Technical
Publications
GE
Medical
Systems
0
Direction
Revision
Advantx@ Sentry..
46-019403
1
TI
ree
Automatic Collimator Operation
Models
46-194755G2
46-177099G1946-194750G1,
46-194765G1
46-177098G1, 46-194755G1,
or
46-233718G1;
and
46-194750G3,
or
46-233717Gl
Product
Copyright@
1989
1991
By
General
Electric
Co
Operating
Documentabon
Direction
46-019403
Revision
1
Advantx@ Sentry- Three
Automatic Collimator Operation
Models
46-177099G1, 46-19475OG1, 46-19475OG3, 46-194765Gl
46-177098G1, 46-19475561, 46-194755G2
or
46-23371861,
or
46-233717Gl
and
IMPORTANT!
X-ray equipment if not properly
used may cause injury Accord
ingly, the instructions herein
contained should be thoroughly
read and understood before you
attempt to place this equipment
in
operation The General Elec
tric Company, Medical Systems
Group, will be glad to assist
cooperate in placing this equip
ment
in
use
Although this apparatus incorpo
rates a high degree
against x
useful beam no practical design
of
plete protection Nor can any
practical design compel the
-
radiation other than the
equipment can provide com
of
protection
rn
and
op-
X-RAY
rn
erator to take adequate precau
tions to prevent the possibility of
any persons carelessly, unwisely,
or unknowingly exposing them
selves or others to radiation
-
-
-
-
is
important that everyone hav
It
ing anything to do with x-radiation
be properly trained and fully ac
quainted with the recommenda
tions
of
the National Council on
Radiation Protection and Measure
ments
ports available from NCRP Publica
tions,
Room
20814,
Commission on Radiation Protec
as
published in NCRP Re
7910
101
6
and
PROTECTION
Woodmont Avenue,
Bethesda Maryland
of
the International
tion, and take adequate steps to
insure protection against injury
All
-
-
-
-
-
-
-
-
persons authorized to use the
equipment must be cognizant
the danger
to x
-
radiation and the equipment
sold with the understanding that
the General Electric Company
Medical Systems Group
agents and representatives have
no responsibility for injury or dam
age which may result from expo
sure to x-radiation
Various protective material and
devices are available
that such materials or devices be
used
of
excessive exposure
It
is urged
of
is
its
-
-
*
GE MEDICAL SYSTEMS
REV
1
AUTOMATIC COLLIMATOR OPERATION
ADVANTX SENTRY THREE
DIRECTION
46-01
9403
SECTION
TABLE
OF
CONTENTS
TITLE
REVISION HISTORY
COLLIMATOR CONTROLS AND INDICATORS
OPERATION
OF
CASSETTE SIZE SENSING TRAY
COLLIMATOR MODE OF OPERATION
CONDITIONS FOR MODES
OF
OPERATION
OPERATING PROCEDURES
PRODUCT SPECIFICATIONS
X
RAY TUBE UNIT HOUSING COMPATIBILITY
SERVICE
PMS DATA RECORD
PAGE
111
1
5
7
8
9
14
15
16
17
1/11
(Blank)
.
GE MEDICAL SYSTEMS
REV
1
ADVANTX SENTRY
AUTOMATIC COLLIMATOR OPERATION
DIRECTION 46-
THREE
01 9403
REV
0
1
PAGE REVISION
NUMBER NUMBER
Title Page
X
Ray
Protection 1
I
I1
111
dnd
iv
Dec
Feb
DATE
11
1989
22
1991
1
1
Blank
1
REVISION
REASON FOR CHANGE
The predecessor to this manual,
systems
systems
Add
ments wth inherent filtration General revisions
Thiq
new direction based upon
mist gray models Clarify that collimator meets all regulatory require-
LIST
OF
EFFECTIVE PAGES
PAGE
NUMBER
HISTORY
OM
D5303C
OM
REVISION PAGE
NUMBER NUMBER
was
used for pre-Advantx
5303C
is
written
REVISION
NUMBER
for
Advantx
a
1
thru
21
1
111
GE MEDICAL SYSTEMS
REV
1
ADVANTX SENTRY THREE
AUTOMATIC COLLIMATOR OPERATION
DIRECTION
46-01 9403
.
ILLUSTRATION
COLLIMATOR CONTROLS AND INDICATORS
15
1
A4
A5
A’
SAMPLE
LABEL
1
r
3A
1v
GE MEDICAL SYSTEMS
REV
1
ADVANTX SENTRY THREE
AUTOMATIC COLLIMATOR OPERATION
DIRECTION
46-01
9403
0
SECTION
COLLIMATOR CONTROLS AND INDICATORS
1
Left thumbwheel prowdes for manual adjustment of longtudinal field size
(left to right dimension as
to increase field size
Upper pointer shows transverse field size, lower pointer shows longtudinal
field size
Field size scale selector
SID,
44 48
use
wth
15"
target tubes One has
other
100
cm, 110 cm
at the time the equipment
a Anode cut off warning label (location shown) indicates anode cut off
point at SID
sion on the longtudinal axls) This applies to 10"
tube targets
Right thumbwheel provides for manual adjustment
(front to back dimension as viewed from front of collimator) Rotate upward
to increase field size
Reduction on off button
manual reduction of field size while operating in the automatic mode (the
on' position) Depress the button a second time to restore
(the
off
position) Replacing a cassette performs the same function as de
pressing the button a second time The amber light flashes when in the
position
60
s
wewed from front
-
Rotate thumbwheel to select scale for the desired
or
72" Two other scale combinations are furnished
40 48
120
cm and 150 cm scales Choice should be made
I
S
installed
of
44'
or
less using a
-
After selecting
of
collimator) Rotate upward
60
'
and
72
"
14
"
x
17" cassette (wth 17 ' dimen
11 O and some 12
of
transverse field size
SID
depress momentarily
orignal field size
for
scales and the
5'
to
permit
on
Key
Swtch - Has three positions
NORMAL
a
OVERRIDE
b
OVERRIDE
c
See Section
NON AUTO Indicator
is in the manual mode It flashes when the REDUCTION
is in the on position
Swtch marked AUX
tube suspensions
REO and must be depressed to couple the dewce It is most important that
this swtch
This swtch has a push-push type action That is the first push activates and
holds swtch in position, and the second push deactivates and releases swtch
See Notes
-
For
normal operation
1
-
For
use
when there
2
-
For
use when the collimator shutters
5
F
-
The amber light is steady
-
May be used
havlng a vertical stereoshifter, this swtch
is
released when stereo work is completed
1
and 2
of
the collimator
is
a cassette size sensing malfunction
for
control
do
not respond
on
when the collimator
ON
OFF
of
compatible options On
is
marked STE
button
1
GE MEDICAL SYSTEMS
REV
1
ADVANTX SENTRY THREE
AUTOMATIC COLLIMATOR OPERATION
DIRECTION
46-01
9403
.
Swtch marked DETENT - Depress when
9
tion at a specific point usually when the focal spot is transversely centered
wth the table top and when the SID beam vertical is
on tube hangers only and applies only when the transverse and vertical locks
On
are released
spare
This swtch has a push
See Notes 1 and
10
Swtch marked
trical angulation lock
late the tube unit about its
angulation lock this
swtch has a momentary
This
depressed
See Notes
Swtch marked VERT - Depress when movlng the tube unit vertically
11
This swtch has a momentary type action (as described in Item
See Notes 1 and
to
1
equipment not havlng electrical detents
-
push type action (as described in Item
2
ANG
-
Applicable to tube hangers and stands hawng an elec
on
the tube support Depress when
short ams
swtch
obtain the function described
and
2
2
IS
a spare
type
it
is desired
On
equipment wthout an electrical
action That
to
stop transverse mo
40
This feature is
this swtch is a
8)
it
is desired to angu
is
the swtch must be held
10)
e
Note
Note
Swtches marked
12
moving
ond time to apply the locks (button out)
lock be applied to maintain the proper SID x ray beam horizontal
These
See Notes 1 and
1
2
Items
Collimators for VRT Tables have different actions and different legends
than described here
limators see Direction
rection
ating Manual)
Items
tor for
the tube unit long~tudinally
swtches have a push-push action (as described
8,
9 10
46-017201
8
9
10
HydradjUSt Table
11
11
LONG
2
and
For
46-017090
(VRT
and
12
and TRANS - Depress to release the locks when
or
transversely (laterally) Depress a sec
It
is
important that the longtudinal
in
item
8)
12
for Models
description
I1
Radiographic and Tomographic Table Oper
are not present
46 23371761
of
these swtches on the VRT Col
(VRT Table Operating Manual)
on
Model
and
46 23371861
46 19476561
Collima
or
Di
a
-
2
GE MEDICAL
REV
1
SYSTEMS
ADVANTX SENTRY THREE
AUTOMATIC COLLIMATOR
DIRECTION
OPERATION
46-01
9403
e
ILLUSTRATION
2
18-
//
li
Note
EXP
13
14
15
The collimator meets all regulatory requirements
tion The removable filtration (described above)
corporated in the Sentry collimator as a user option
that are interested in additional dose sawngs through additional hardening
of
wll
HOLD
improper positioning of some element of the system such as the tube unit
Bucky stand
FIELD LIGHT
lates the x ray field at any gven collimator setting The light
seconds Time interval may be reduced by a senweman
Slot
for
a Model
46 23371761
added
the x-ray beam
decrease slightly
b Model
Mammography Collimator For technics below
until
way in a safety interlock prevents exposures about
is not fully inserted
Indicator - Red light
button - Depress momentarily
added filters
46 17709961 46 19475061, 46-19475063, 46 19476561
46 17709861 46 19475561 46-19475562
it
hits the stop
-
Collimator Extra Filtration of
As
additional aluminum filtration is added, contrast
For technics above
on
indicates x ray lockout because of
to
obtain a light
1
2
wth the inherent filtra
IS
a feature that was in
It
is prowded
49
kVp, pull the filter out
49
kVp push the filter all the
or
field
wll
stay on
if
so
desired
3
mm
or
46 23371861
49
kVp
that simu
30 60
AI
may be
for
sites
if
the filter
or
or
3
GE
MEDICAL SYSTEMS
ADVANTX SENTRY THREE
AUTOMATIC COLLIMATOR OPERATION
REV
1
DIRECTION 46-
Rotation Detent Button - Depress button and rotate collimator until approxl
16
mate position desired
tor slightly until latch engages Detents are located at
and
k90°
from the front position
may be screwed in about
button before attempting rotation
Cone Tracks
17
snaps into slot on right track Press latch to release cone
Measuring Tape
18
ing on tape which corresponds to desired source
even
wth
of
end
to measure
-
bottom of collimator housing For accurate measurements tab on
tape must be extended Tape has both an inch and centimeter scale
SID s up
is
reached then release and continue to rotate collima
0
"
k15"
k3Oo
To
obtain more positive latching the button
3
turns Hence
Slide cone into tracks from front of collimator until cone latch
-
Extend tape to film plane and move collimator until mark
to
79
"
(200
cm)
it
wdl
be necessary
for
to
image distance
to
unscrew the
removal
01 9403
545"
(SID)
.,
is
4
GE
MEDICAL
REV
1
SYSTEMS
ADVANTX SENTRY THREE
AUTOMATIC COLLIMATOR OPERATION
DIRECTION
46-01
9403
ILLUSTRATION
CASSETTE
SIZE SENSING
CASSETTE MECHANISM
STAINLESS STEEL
CENTERING ADJUS
3
CASSETTE IN PLACE SWITCH,,
TRAY
TRAY HANDLE
D5303HG
AMPHENAL CONNECTOR
CLAMPING MECHANISM
NTERING SCALE
CLAMPING MECHANISM
CLAMPING LOCK
SECTION
2
OPERATION
Centering
Centering Scale
OF
CASSETTE SIZE SENSING TRAY
To load a cassette pull the tray out
Activate the clamping mechanism by lifting the clamping lock See Illustration
Cassette Size Sensing Tray
Slide the clamping lock to permit inserting the cassette into the clamping mecha
The lock automatically centers the cassette lengthwse in the tray and se
nism
curely holds
it
Center the cassette wth either the centering scale
clamps
Push the clamping lock against the cassette and lock
In-Place swtch
Shelf
A
Centering Shelf is provided to assist you in positioning a cassette in a vertical
bucky The shelf conveniently located
Insert the shelf in the Centering Scale holes that correspond wth the cassette size
selected
in place
D5303HG
of
the bucky
on
the left is removable wth one hand
to
the tray stop
or
the centering notches in the
it
This activates the Cassette-
3
for
5
GE MEDICAL SYSTEMS
ADVANTX
SENTRY
THREE
AUTOMATIC COLLIMATOR OPERATION
REV
1
Place the cassette on the shelf and center
it
wth the heavy Black Center Line
DIRECTION
46-01
9403
of
the
b
u
centering Scale
The top of the cassette
example
also be at ten
if
the shelf is inserted in the ten
(10)
wll
be in line wth the markings
on the scale
(10)
position - the top
on
the Centering Scale
of
the cassette
For
w11
Push the Clamping Mechanism against the cassette and lock the Clamping Lock
Note
To prevent the locking handle from catching on the Bucky frame and poss
ibly being damaged, the handle must be in the locked position before in
-
even
if
setting the tray in the Bucky
a cassette is not in the tray
Normally the tray does not have to be completely removed from the Bucky in order
to load a cassette In most instances cassettes may be inserted in the tray
by
the tray out until movement is stopped
Sufficient space is available for inserting
However
if
it
is desired to remove the tray from the Bucky pull the tray out until
the catch on the bottom
a
cassette when the tray is in this position
is stopped by the catch then press the catch against the tray bottom and hold
by
of
the tray
pulling
it
it
while sliding the tray from the Bucky
This tray has two cassette size sensors
-
one an arm bearing against the side
of
the
tray (senses longtudinal dimension) and the other connected to the rear cassette
clamp (senses transverse dimension)
Note
Be careful not to deform the sensing arm It
s
angular shape
obtaining accurate field limiting Should the arm become bent
replaced attempts should not
The tray must be insetted
all
this is not done the collimator
the
way
wlll
not transfer
be
made to straighten
into the Bucky to make electrical contact
to
the automatic mode
it
IS
important in
it
must be
of
operation
If
6
GE
MEDICAL
REV
1
SYSTEMS
ADVANTX SENTRY THREE
AUTOMATIC COLLIMATOR OPERATION
DIRECTION 46-
01
9403
0
SECTION
COLLIMATOR MODES
OPERATING MODE KEY SWITCH FUNCTION INDICATOR
Automatic
Reduction
X
Manual
System Failure
3
ON
Ray Lock Out
NORMAL Position
OFF
NORMAL Position
OVERRIDE
OVERRIDE
OF
OPERATION
1
Position*
2
Position*
Automatic limiting of the field size to the size of the NON
film Response to film size dimensions of
ches
Manual adjustment of the field size to an area smaller NON
than the film size provided Adjustment of field size to Light flashes
a size greater than
automatic mode) Field size automatically returns to
full
film size when the cassette
button is depressed a second time
Rad x-ray exposure
not proper or certain other equipment position
quirements not satisfied
details)
Manual adjustment of the field size over the
of blade travel provided
Cassette size sensing malfunction Permits manual NON-AUTO (Amber)
adjustment of the field size over the
travel
Permit hand
malfunction (See Illustration
-
driving
full
film
not
possible (while
IS
changed or when
not
possible because SID setting
(See
following section for
of
blades in case of collimator NON-AUTO (Amber)
7)
full
5
range
to
17
in- Light OFF
in
the
re Light ON
full
range NON-AUTO (Amber)
of
blade Light
-
AUTO (Amber)
-
AUTO (Amber)
EXP
HOLD (Red)
ON
Light
ON
Light ON
e
'Key is not removable from the switch when in this position
7
GE MEDICAL SYSTEMS
REV
1
ADVANTX SENTRY THREE
AUTOMATIC COLLIMATOR OPERATION
DIRECTION 46-
01 9403
i
SECTION
CONDITIONS
SET-UP
Tube Unit over horizontal
table or Ven Bucky
Stand Bucky
Table at
chest
holder
Table
4
80-90"
unit
cassette (film)
verbcal
10-80"
V
FOR
verbcal
or
10-80"
MODES
or
T
OF
OPERATION
MODE (A)
Automatic
Manual
-
Ray
X
Lockout
Automatic
Manual
X
-
Ray
Lockout
Manual Not at preset SID positions
CONDITIONS FOR MODE
1
Key switch in NORMAL position
2 Table or Bucky horizontal within
3 Cassette in tray tray in Bucky
-
ray beam veri
4 X
downward
5
Table top in lowest position
Stand Bucky
or at alt position above
6 SID36 ormore
Any one or more of conditions 2 3 4 and 6
violated
Key switch in NORMAL position
Condition
met (D)
1
Key switch
2 Table or Bucky vertical within
3 Cassette in tray tray
place
4
X
ray beam horizontal within
rected toward Bucky or film
5
Bucky Stand Bucky
right position
6 SID at preset value (B)
Any
one or more of Conditions 2 3 and
lated
Condition
and/or Condition 6 violated with Conditions
2 3
and4met
19
5
violated with Conditions 2 and 3
in
NORMAL position
5
violated with Condition 3 met
within
5
from floor
in
~10"
L
10
"
directed
19
5
10"
in
Bucky or film in
&loo
or
180"
from up
FUNCTION
Automatic Operation
1
Manual Operation
~
Automatic Operation
di
-
-
Manual Operation
4
vio
-
No Rad X
sure Permitted
1
Manual Operation
-
Ray Expo
I
X-Ray
Table
80-90"
T
System Failure
(A)
As conditions are met or not the system automatically switches from manual (NON-AUTO) or x-ray lockout
automatic mode and vice versa
(B) Selection of 3 SID
60
(or
72
)
for automatic operation For Advantx systems using Release 12 x and later Applications software manual operation
is permitted from
(C)
Key
(D)
switch in
If
table top is elevated x-ray lockout will occur if Conditions 2 3 and 4 have been met
%inch to 35-inch SID x-ray beam horizontal X-ray
OVERRIDE
-
Ray
X
Override
Override 2
s
for x ray beam horizontal technics made when equipment is installed usually these SID s are
1
and
At preset SID
Other conditions for auto mode operation
in manual mode
1
Conditions for auto mode apply except key
switch must be
Any Key Switch
2
positions
positions with x-ray beam with-
in
OVERRIDE 1 position (C)
in
OVERRIDE2 position (C)
does
not override x-ray lockout
No Rad X
sure Permitted
No Rad X
sure Permitted
Manual operation for
cassette size sensing
malfunction
Hand operation of
blades for collimator
drive malfunction
is
locked out at all other SID s beam horizontal
-
Ray
-
Ray Expo
Expo
-
-
-
(EXP
INDICATOR
Amber
Off
Red
Off
Amber On
Red
Off
Amber On
Red On
Amber
Off
Red
Off
Amber On
Red
Off
Amber On
Red On
Amber On
Red
Off
Amber On
Red On
Amber
Off
Red
On
Amber On
off
Red
Amber On
Red
Off
HOLD) to the
40
48
and
8
GE
MEDICAL
REV
1
SECTION 5
OPERATING PROCEDURES
SYSTEMS
ADVANTX SENTRY THREE
AUTOMATIC COLLIMATOR OPERATION
4
DIRECTION 46-
01
9403
ILLUSTRATION
4
A
AUTOMATIC MODE - TABLE
4
I
-
I
X-RAY TABLE
A-
1
OR
BUCKY STAND, HORIZONTAL TECHNICS
111
VERTICAL
-
BUCKY
STAND
Angulate the table or Stand Bucky to horizontal
Table top must be in its lowest position (if applicable) Bucky Stand must
5
"
be 19
Engage appropriate patient support devlces
Place loaded cassette in tray and insert the tray
See Section
Admit patient and position tube unit, beam vertical, directed downward
*loo
Use FIELD LIGHT to precisely center the tube unit over the point
Set
(Red) lights should be off
Position Bucky directly under the point of interest using FIELD LIGHT as
a guide Bucky centering light facilitates longtudinal alignment of focal spot
wth cassette in Bucky
Select technic factors at x ray control make the exposure and remove the
cassette
*Check that there are no other cassettes or film in place in other dewces
*
'After setting the SID a smaller field size can
depressing the REDUCT
manually See Section 1, Item
from the floor (legs down) or at an alternate position above 19
2
for
SID
above
operation
36
"
At this point, the
of
the cassette size sensing tray
NON
AUTO (Amber) and EXP
If
this is not the case, refer to Section
ON
OFF button and adjusting
5
The amber light should flash
*loo
all
the
way into the Bucky
of
be
obtained by momentarily
the
collimator blades
5
"
interest
HOLD
4
**
9
GE
MEDICAL SYSTEMS
REV
1
ADVANTX SENTRY THREE
AUTOMATIC COLLIMATOR OPERATION
DIRECTION
46-01 9403
ILLUSTRATION
I
B AUTOMATIC MODE - TABLE
5
I
X-RAY TABLE VERTICAL BUCKY STAND
1
Angulate the table to
-
4
OR
BUCKY STAND VERTICAL TECHNICS
90
"
vertical
go+/-1
or
Stand Bucky to
1-c
oo
otl-loo
1
41
0"
Oo
\
OR
position
180'
Elevate Bucky
vlces
as
position
2
Place loaded cassette in tray and push tray
See Section 2 for operation of the cassette size sensing tray
3
Admit patient and adjust Bucky position to coincide wth the point
Secure patient
4
Align tube unit
The x ray tube unit must be positioned
*loo
from the horizontal, directed toward the Bucky Use the FIELD LIGHT
andlor correlation scales
of
the distances (such as 40 ' 48
was installed
At
this point, both
lights should be
5
Select technic factors at the x ray control make the exposure and remove
the cassette
'Check that there are no other casettes
to
approximate height required and engage patient support de
appropriate The Stand Bucky must be at the upright
all
the
way
into the Bucky
suppon devlces
wth the Bucky and set SID
to
-
must be greater than
NON
AUTO (Amber) and EXP HOLD (Red) indicator
off
If this is not the case
if
any
so
the central x ray beam wll be wthin
align laterally and longtudinally Set
',
or
60
)
selected at the time the equipment
36'
check Section
or
film in place in other dewces
4
(0")
**
or
of
interest
SID
180"
at one
'After setting the SID a smaller field size can be obtained
ON
depressing the REDUCT
manually
See Section
10
OFF button and adjusting the collimator blades
1,
Item 5 The amber light should flash
by
momentarily
GE
MEDICAL
REV
1
SYSTEMS
ADVANTX SENTRY THREE
AUTOMATIC COLLIMATOR OPERATION
DIRECTION 46
-
01
9403
ILLUSTRATION
CHEST
UNIT
6
n
CHEST
UNIT
a
AUTOMATIC MODE
C
-
WALL
MOUNTED CASSE’ITE HOLDERS
1
Place loaded cassette in holder or advance film to exposure area
Make sure there are no other cassettes in place in other devlces
2
Admit patient and adjust height of cassette
Secure patient support devlces as appropriate
3
Align tube unit wth cassette
The x ray tube unit must be positioned
from horizontal
and/or correlation height scales for lateral and vertical alignment wth the cas
sette or film Set SID at one of the distances (greater than
the time the equipment was installed (such as
At this point both
lights should be
4
Select technic factors at the x ray control make the exposure and remove
the cassette or transport the film into the take up magazine
‘To obtain a
button and adjust the collimator blades manually See Section
amber light should flash
directed toward the cassette
NON
off
If
smaller
field size momentarily depress the REDUCT
or
AUTO
this is not the case, check Section
OR
OTHER CHEST UNITS
film and set
so
the x ray beam
(Amber) and
or
film holder
SID
**
wll
be wthin
or
film Use the FIELD LIGHT
36”)
selected at
60
’
or
72
48
EXP
HOLD
’)
(Red) indicator
4
ON
1
Item 5 The
*loo
OFF
11
GE MEDICAL SYSTEMS
D
MANUAL
MODE
OPERATION
ADVANTX SENTRY THREE
AUTOMATIC COLLIMATOR OPERATION
The manual mode of operation may be used for special technics
tem failure as indicated in Section
Summary of conditions one
the manual
1
No
tray in Bucky, tray in Bucky wth no cassette in place
(NON
AUTO)
or
mode amber light on
3
and 4 and Section
more
of
which
wll
cause the collimator to go into
or
5
F
below
or
no film in expo
in case of sys
sure position
2
Tube unit positioned outside of
3
Table
or
Bucky outside of
4
SID less than
5
Key switch in OVERRIDE
Other than one
or
36
"
(x ray locked out at less than
more
of
the above exceptions the set up procedure is the same
*loo
limits from horizontal
*loo
limits from horizontal
1
or
2
positions
or
vertical
20
beam horizontal)
or
vertical
as for automatic mode operation Operate the collimator manually as follows
1
Verify positioning by using the FIELD LIGHT
2
Measure SID by using the measuring tape Reference Section 1 Item
Extend tab on end of tape and measure to film plane
top and add the distance to the film plane) Film plane
on the Monitrol Table is
3
Turn the FIELD SIZE SCALE SELECTOR to correspond wth the SID
2
5
on the Bucky Stand
(or
measure to table
-
table top distance
2
"
18
E
TOMOGRAPHY
F
SYSTEM FAILURE
1
Refer to Section
4
Turn the thumbwheels Section 1 Items 1 and
2
indicate the cassette size being used
Item 3 for explanation of this feature
4,
so
that the pointers Item
Check
wth FIELD LIGHT
Operate the system in the same manner as for the automatic mode The
requirement
excursion
1
If
correspond
RIDE
2
If the collimator blades do not respond in either manual
they can be operated
key swtch to OVERRIDE
This means
for
alignment of the x ray beam is automatically by passed during the
so
the collimator
wll
stay in the automatic mode
the cassette size sensing feature malfunctions (failure
wth the cassette
1
position and operate in the manual mode per Section
or
film size) turn the key swtch
wth a screwdriver as shown on Illustration 7 Turn the
2
position before using the screwdriver
of
Operating the Collimator should be used in
of
the light field to
to
the OVER
5
D
above
or
automatic mode
case
Emergency only Excessive Hand Driving may result in Destruction
the Motor Drives within the Collimator Immediately call a GE Repre
sentative to obtain Service
'Call a GE representative to obtain service
*loo
of
of
12
GE
MEDICAL
REV
1
SYSTEMS
-
ADVANTX SENTRY THREE
-1
AUTOMATIC COLLIMATOR OPERATION
DIRECTION
46-01
9403
0
ILLUSTRATION
OPERATION WITH
PRY PLUG BUTTON
OUT WITH SCREWDRIVER
7
A
KEY
SWITCH IN OVERRIDE 2 POSITION
PRY
PLUG BUTTON
WITH
OUT
SCREWDRIVE
B
ENGAGE
GEAR AND TURN T-HANDLE HEX WRENCH
UNTIL DESIRED FIELD
T-HANDLE
HEX
WRENCH
IS
OBTAINED
I
N
SLOT
I
N
C
Refer
to
Illustration
collimator trim cover
Depress the rotational detent button and rotate the collimator
position Refer
of
the rear
the collimator Look into the opening In each cover and locate the
slotted gear (see Illustration
gear and turn the
Replace the plug buttons and rotate the collimator back
7 A and remove the plug button in the right side of the main
to
Illustration
T
handle hex wrench until the desired field coverage is obtained
7 B and remove the plug button in the trim cover on
7
C)
Engage a T handle hex wrench In the slot in each
90
"
from the front
to
the front position
13
GE MEDICAL SYSTEMS
REV
1
ADVANTX SENTRY
AUTOMATIC COLLIMATOR OPERATION
DIRECTION
THREE
46-01
9403
e
SECTION
PRODUCT SPECIFICATIONS
6
A high intensity
illumination Distinct shadow crosshairs indicate the field center
ing light is
Full
prowded
angle tubes and
The collimator includes a handle for manipulation of the tube hanger
Tube hanger
front of the collimator
The collimator can be rotated and locked positively at
f90"
Response time for
seconds
Maximum rating of the diagnostic source assembly is
Model
46 23371761
of aluminum equivalent at
serting the 1 mm and/or 2 mm aluminum filters
GE
Quartzline@ Lamp wth provlsions for long life is used for field
A
Bucky center
provlded
17' x 17
"
for tubes
to
aid in longtudinal focal spot Bucky alignment
radiographic coverage at a
wth a
15
"
target angle
16
" x 16'
at
40
SID for
40'
source
(14' x 14
12
5"
to
image distance (SID)
'
at
40
'
SID for
target angle tubes)
or
or
tube stand locks are controlled by the pushbutton swtches on the
0"
k15"
*30°
from the front position
mammum
to
minimum openings and vlce versa is less than
150
kVp
46 17709961 46 19475061 46-19475063 46 19476561
Collimator Minimum inherent filtration
150
kVp Additional filtration may be obtained by in
of
the collimator is
11
"
target
tube stand
k45"
and
1
or
1
5
mm
is
5
Model
phy Collimator Minimum inherent filtration
num equivalent below
bringmg the minimum inherent filtration
equivalent at
1
phy at each
The nameplate bearing equipment model number and serial number is located on
the lower rear of the collimator
The cassette tray contains
cassettes from
Cassettes must meet ASA specification
1-1/8
46 17709861 46 19475561 46-19475562
of
50
kVp Above
150
kVp (A safety interlock prevents exposures above
5
mm AI filter is not fully inserted This insures proper beam quality for radiogra
kVp range)
provlsions for sensing cassette size, and accommodates
5
"
x
7
"
to
14 x 17'
'
greater in length and wdth than the film)
49
kVp the
of
the collimator to
PH
or
46 23371861
the collimator
1
5
mrn filter must be inserted
3
21 1957
Mammogra
is 0 1
mm of alumi
1
6
mm of aluminum
49
kVp
if
the
(The cassette must be
14
ADVANTX SENTRY THREE
GE
MEDICAL SYSTEMS
REV
6
1
AUTOMATIC COLLIMATOR OPERATION
DIRECTION
46-01 9403
@
SECTION
X
RAY
TUBE UNIT HOUSING COMPATIBILITY
7
For
compatibility data, see the system pre installation manual
for
the system being
installed or modified Refer to Sentry Three Automatic Collimator Planning Direc
46-017 158
tion
Section 2 Compatibility
GE MEDICAL SYSTEMS
REV
1
ADVANTX SENTRY THREE
AUTOMATIC COLLIMATOR OPERATION
DIRECTION
46-01
9403
b
SECTION
8
SERVICE
Preventive Maintenance
Note
Qualified Service
In order to assure continued safe performance of this x ray equipment a preven
tive maintenance program must
supply
or
arrange for this semce
be
established It is the owner s responsibility to
Maintenance procedures for the Sentry Three Automatic Collimator are required
of
three months after completion
These maintenance procedures are described in Chapter
matic Collimator Semce Manual Direction
rection
46-0
194
19
Advantx PM Schedules available from representatives of GE
installation and every six months thereafter
4
of Sentry Three Auto
46-001414
(SM
D5303C)
and in Di
Medical Systems
A
maintenance check list PMS Data Record - Sentry Three Automatic Collima
tor is a guide
this operation manual (This PMS Data Record was formerly called Form
Before filling out the PMS Data Record make copies
Safe equipment performance also requires the use of
trained on medical x ray apparatus
tain a world
to
typical maintenance tasks It is provided as the last five pages
of
F3557)
of
it
for future use
semce personnel specially
GE
Medical Systems and its associates main
wde organization of stations from which skilled x ray service may be
obtained If desired arrangements can usually be made to have preventive and/or
emergency
semce performed on a contract basis A GE representative will be glad
to discuss this plan
User Service and Maintenance
Cleanliness is a prime rule in maintaining equipment At least once a month exter
nal surfaces should be wped using a cloth moistened in clean water to remove any
foreign material that may have accumulated
kind as they may dull the finish
paste wax Do not use a wax containing a cleaning substance Do not use wax on the
dial
General Electric x ray equipment contains operation safeguards to ensure maw
mum safety Aside from routine maintenance any abnormal noise
unusual performance should be reponed immediately
representative Before calling for
operated in accordance
or
light field wndow
Do
not use cleaners or solvents
or
blur the lettering Polish wth PURE liquid
semce however be sure the equipment is being
wth the foregoing instructions
vlbration or
to
a GE Medical Systems
of
any
or
16
GE
MEDICAL
REV
1
SYSTEMS
PMS DATA RECORD
DATE
OF
INSPECTION
MODEL AND SERIAL NUMBER Collimator
ADVANTX SENTRY THREE
AUTOMATIC COLLIMATOR
DIRECTION
I
OPERATION
46-01
9403
Page 1 of
5
Use this form in conjunction
descriptive words such as
OK
indicated
A
MAINTENANCE
1
Cleaning and lubrication
-
COLLIMATOR
a Ends of movlng shafts
b Blade pivot points
c Ball and socket joint
d Pulleys gears and bushings
e Pointer tracks
2
Inspection
a Interface
(1)
(2)
wth tube unit
Mounting screw tightness
Interface plate condition
b Steel drive cables
(1)
Condition
(2)
Tension
wth PMS work and functional checks Under RECORD INFORMATION enter
,
Adjusted Lubed’
or
N/A
if
not applicable Enter measurements made
if
so
of
Tightness
c
screws and other
assembly hardware
Electrical connectors and harness leads
d
(1)
Condition
(2)
Cleanliness
e
Dress away
parts and light
from
mowng
box
of
light field wndow
and mirror
f
Engagement
of
blade drive
motor output gears
g Adjust drive spring cable
tension
List test equipment used,
PMS PERFORMED
if
necessary
BY
wth serial numbers
This record should be filed in room wth x ray room log form No
17
F3219
This page may be copied permission has
been granted
by
the General Electric
Co
GE MEDICAL SYSTEMS
REV
1
B
MAINTENANCE - CASSETTE SIZE SENSING TRAY
1
Inspection
a Tray plug and Bucky receptacle
(1) Condition
(2)
‘Float” freely in the horizontal
and vertical directions
wth no
binding
Bucky pin and pad assembly
b
(1)
Condition
’
(2)
direction
Floats
freely in the horizontal
wth no binding
c Condition of gears pulleys, sensing
arm steel cables and pots inside
mechanism compartment
2
Cleaning
Contact surfaces of tray plug and
a
Bucky receptacle
b Inside of mechanism compartment
3
Lubrication
Tray plug contact surfaces
a
(WD
40
spray lubricant)
ADVANTX SENTRY THREE
AUTOMATIC COLLIMATOR OPERATION
DIRECTION
46-01
9403
b
In general, moving parts of the cassette
tray should not require lubrication during
the life of the tray
C
FUNCTIONAL
1
Functional Performance
a Table horizontal techniques
Techniques involwng an
b
c Off table radiography involwng
Vertical Bucky Stand
Off table radiography involwng
d
17”
2
Field Light Operation
a Field light
Light field quality (uniform bright
b
ness sharply defined edges)
c Voltage across lamp’ VAC
3
Film quality (uniform density, no radiation
cut
off
not excessive)
CHECKS
*
angulating table
flxed
image receptor size chest unit
‘
on” time interval sec
sharply defined edges penumbra
14
‘
x
18
This page may be copied permission has
been granted by the General Electric
Co
GE
MEDICAL
REV
1
4
Alignment
AUTO RAD COLLIMATOR-TO-TABLE BUCKY
SYSTEMS
and
Field
Sizing.
ADVANTX SENTRY THREE
AUTOMATIC COLLIMATOR OPERATION
DIRECTION
46-01
Page
3
9403
of 5
SOURCE - RECEPTOR
CONFIGURATION
Beam Angulation
;ID
Error
CENTER
g~~:p~[
LIGHT
TO
X-RAY
Error
-IELD
SIZE
NDICATOR
Error
SIZE
I-
SIZE
Error{
Indicated
Actual
-
[
Incheskm
4
1
%SID
r
Incheslcm
%SID
Total
I
ncheslcm
Total Lat
1
{
Total
Incheslcm
Total Long
%SID
Indicated
Actual
Lat I nches/cm
Lat
4
I
Long Inches/cm
[
Long
Film Size
~~ ~~
Measured
Field Size
Lat
Lat
_________~
Long Incheslcm
Long,
Total
Lat
Long
-
_.
%SID
%SID
Incheslcm
%SID
%SID
%SID
%SID
OVERHEAD MOUNTED TUBE UNIT & TABLE IMAGE RECEPTOR
I
(1
7%
maxJ
(1
8%
Mxj
(1
8%
MxJ
(1
8%~)
I
(1
7%m)
(1
7%
max
J
I
Vert
24x30cm 35x43cm
10 x12
I
14
x17
I
!
I
MIN
SID
Horlz
MAX
!
t
@
I
SID
(1)
I
12
8%
(2
8%
(38%max)
Vert
MAX
man
man
SID
b
)
(1)Test
All
on both
calculabons must
SS
and LS document worst case
be
in inches
or
cm
19
This
page may
been granted
be
copied permission has
by
the General Electric
Co
GE MEDICAL SYSTEMS
ADVANTX SENTRY THREE
AUTOMATIC COLLIMATOR OPERATION
REV
1
4
Alignment and Field Sizing (Continued)'
AUTO RAD COLLIMATOR TO CHEST UNIT
I
SID
CENTER
TO
CENTER
LIGHT
TO
X-RAY
(1)
I
SOURCE - RECEPTOR
CON FI GU
Beam Angulation
(
Error
4
r
Error
4
I
c
Error( Total
I
I
RAT1 ON
Indicated
Actual
Incheskm
%SID
Inches/cm
%SID
Total Lat
Inches/cm
Total Lat %SID
Long
Incheskm
I
(1
(1
(1
I
7%
8%
8%
W)
fn%J
max)
DIRECTION
OR
VBS
OVERHEAD MOUNTED TUBE UNIT & TABLE IMAGE RECEPTOR
Horiz
SID1
I
SID
2
46-01
Vert
.
9403
FIELD SIZE Indicated
INDICATOR
I
I
(1)
Error
I
I
SIZE
.
-
SIZE
I
Error
I
I
(1)
NOTE
Do
All
calculabons must
Actual
Lat
r
Lat %SID
4
I
Long Incheskm
I
Film
Measured
Field
(
Lat
I
Lat %SID
4
Long Incheskm
i
Long
[
Total
not repeat
be
Incheskm
Size
Inches/cm
rf
already
in inches or crn
Size
%SID
%SID
performed
I
(1
8%
max)
(1
7%
Mx)
I
'88',':im
I
I
on previous
24x30cm 35x43cm
I
10
X12
I
14 x17
I
I
page
I
I
I
.''
' '
'
'."'
.''
'
"""
'
-
I
I
I
I I
I
I
(2
8%
max
)
12
8%
max
I
13
8%
max
)
20
This page may be copied permission has
been granted by the General Electric Co
GE MEDICAL
4
REV
e
SYSTEMS
1
5
Blade Response
a Damping
b
Smoothness
of
operation
c SID Compensation
6
Alignment
7
Operation of Filter Interlock
wth
Extension Cylinder
Mammography Collimator
8
Collimator Rotation
of
a Smoothness
operation
b Detent action
Movlng effort
c
9
Cassette Size Sensing Tray
-
Cassette Clamping
a Cassette clamp alignment
b
Clamping force
10
Beam Quality - Half Value Layer of
Useful
Beam(check per Direction
System Field Tests
for
HHS
or
-
46-01 3894,
Compliance
Cone
ADVANTX SENTRY THREE
h
AUTOMATIC COLLIMATOR OPERATION
DIRECTION 46-
Page
01
lbs
9403
5
of 5
(kg)
mm
)
*
*Results must also be recorded on Data Record Form
F3382,
“Data Record for HHS Field Tests”
21
This page may
been granted
be
copied permission has
by
the General Electric
Co
Loading...