Philips Medical Systems
540 Alder Dr.
Milpitas, CA 95035
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Philips provides this document without warranty of any kind, either implied or expressed,
including, but not limited to, the implied warranties of merchantability and fitness for a particular
purpose.
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Philips has taken care to ensure the accuracy of this document. However, Philips assumes no
liability for errors or omissions and reserves the right to make changes without further notice to
any products herein to improve reliability, function, or design. Philips may make improvements
or changes in the product(s) or program(s) described in this document at any time.
About This Document
This document provides site planning information for customers planning to purchase a Skylight
camera and their facility engineers, structural engineers, site planners and architects.
CAD Drawings
Drawings in a DWG format for the Skylight system are downloadable from the following website
for architects planning room layouts:
Figure 1-1 on page 1-3 illustrates the Skylight components described below.
The Skylight system consists of an overhead frame supported by four 4" diameter
steel posts.
The system images patients as they lie on a patient table inside the frame.
A carriage translates along the overhead frame
and supports two image-collecting detectors.
The detectors can move up and down, in and
out, and rotate around their own axis. This
allows the detectors to image patients from
above, below, or from the sides of a patient.
Prior to imaging a patient, nuclear medicine
technologists attach a pair of “collimators” on
the detectors. Collimators are 21" x 26" (53cm x
66cm) sheets of lead. Several different types of
collimators exist; collimators weigh between
110 and 260 lbs (50 and 118 kg).
When a pair of collimators are not on the detectors, technologists will store the
collimators in a floor-mounted, collimator exchanger on one side of the Skylight
frame.
The system also includes two “towers” containing electronic components: the PC
tower and the power tower.
The PC tower contains image processing and networking equipment.
The power tower contains an uninterruptible power supply (UPS) and other power
supplies.
Collimator
Detector
In/Out
Up/
Down
The PC tower, power tower, collimator exchanger and vanity covers fill one side of
the Skylight frame.
1-1
Section 1: General Requirements
Clinical Operation
Although not shown in Figure 1-1, a desktop processing station (a PegBlade) must
be located outside the frame, but preferably in the same room. From the PegBlade,
physicians view and interpret images produced by the system.
Patients to be imaged by the Skylight system receive a small intravenous injection
of a gamma-ray-emitting radionuclide. The collimators contain a pattern of
gamma-ray admitting holes perpendicular to the imaging surface of the detectors.
The detectors sense the radiation that passes through holes in the collimators.
The detectors transmit electronic data to image processors in the PC tower. The
image processors produce images for physician interpretation on the PegBlade
processing station.
The Skylight system performs these types of clinical studies:
•Emission Computed Tomography (ECT) -- the carrriage remains in one
position while the detectors rotate around the patient’s torso. Image
processors produce a set of three dimensional tomographic images. The
images show radionuclide concentration in parallel slices of the patient’s
internal organs.
•Total Body -- the carrriage translates along the length of the patient (usually
head to toe). One detector scans above the patient table; the other scans
below patient table. The image processors produce two images (anterior and
posterior) showing radionuclide concentration in the patient’s skeleton and
other tissue.
•Static (Spot) or Dynamic -- the carriage and detectors remain fixed positions
near the patient. The system produces either a single image (static), or a
sequence of images (dynamic) showing the flow of radionuclide within the
patient over time.
1-2
Frame
Frame
Support
Post
(1 of 4)
Carriage Motion
Carriage
Section 1: Room Requirements
Power
Tower
Exchanger
Support
Post
Detector #1
Patient Table
Note:
Covers around front posts and
filling all open spaces above
Power Tower, PC Tower and
Exchanger are not shown.
Detector #2
(see detail)
Collimator
Detector
Collimator
Exchanger
Vanity
Cover
PC
Tower
In/Out
Up/
Down
Detector #2 Detail
(Detector #1 is similar)
Figure 1-1. Skylight Camera System.
1-3
Section 1: General Requirements
Collimator Exchanger
Technologists store collimators in vertical drawers of the collimator exchanger.
To transfer a collimator from an exchanger drawer to a detector, an operator will
swing the drawer 90° into the room, translate the carriage to the exchanger, and
move a detector next to a drawer as Figure 1-2 illustrates.
All Skylight systems come with a two-drawer collimator exchanger. That exchanger
will hold four pairs of collimators.
Customers may purchase a second, one-drawer collimator exchanger. The onedrawer exchanger will hold two more pairs of collimators. As Figure 1-3 shows, the
one-drawer collimator exchanger resides on the same wall as the two-drawer
exchanger.
Skylight Models
The Skylight system comes in one of four models:
•a 9 foot Skylight,
•a 9 foot California (seismic) Skylight,
•an 8 foot Skylight,
•an 8 foot California (seismic) Skylight.
The California (seismic) models have thicker-walled steel posts and three top braces
above the Skylight frame.
Vibration Specifications
Nuclear medicine cameras do not have floor vibration specifications. This is
because:
•image collection durations are long (10 - 300 seconds, or more) and floor
vibration durations are much smaller,
•vibrations are typically sinusoidal and, therefore, tend to cancel out, and
•the patient table and detector/gantry assemblies are both floor mounted and
tend to vibrate together.
1-4
Section 1: General Requirements
Collimator exchanger drawer
swung 90° around exchanger
support post to transfer
collimators from or to Detectors
Detector #2 in position
to transfer a collimator
to or from the collimator
exchanger
Figure 1-2. Collimator Exchange Operation.
Exchanger
Support Post
(two drawer)
Two-Drawer
Collimator
Exchanger
One-Drawer
Collimator
Exchanger
(optional)
Exchanger
Support Post
(one drawer)
Figure 1-3. One-Drawer and Two-Drawer Collimator Exchangers
1-5
Section 1: General Requirements
Power Requirements
The power requirements for a Skylight camera and PegBlade are as follows:
Skylight Camera PegBlade
Input Voltage:208 - 240 V - dedicated120 V
(International)208 - 240 V - dedicated220 V
Peak/Quiescent Current:15 A / 4.8 A5 A / NA
(International)15 A / 4.8 A2.5 A / NA
Phase:Single PhaseSingle Phase
Receptacle:HardwiredNEMA 5-15
Note: The Skylight camera includes a UPS and provides power to the detectors,
carriage, patient table, towers, acquisition terminal and collimator exchanger. An
optional cardiac gate can plug into a 115 volt receptacle on the patient table.
The camera room HVAC system must maintain the temperature between 60°- 75° F
(16° - 24° C) with less than 10° F (6° C) variation per hour. Humidity must be
between 20% - 75%.
These requirements must be met on a 24 hours per day, 7 days per week basis.
Magnetic Field Limitations
To avoid image quality and video monitor problems, the Skylight system must not
be in an area with a magnetic field greater than 1 Gauss.
Floor Levelness
The floor under the four Skylight frame posts, the collimator exchanger post(s) and
the patient table must all be at the same level ±1".
1-6
Room Layout
Room Size Requirements
Section 2
9 Ft Skylight
W x D x H _ W x D x H _
Minimum Size 12'-6"x 14' x 9'12'-6" x14'x 8'
381cm x 427cm x 274cm 381cm x 427cm x 244cm
Recommended Size 16'-7"x 16'-10" x 9' 16'-7" x 16'-10" x 8'
505cm x 513cm x 274cm 505cm x 513cm x 244cm
Figure. 2-1 illustrates a minimum room size. In such rooms, the site must provide a
separate, nearby room for the PegBlade processing station.
Figures 2-2 and 2-3 illustrates two recommended room sizes. Such rooms facilitate
patient access and technologist/physician convenience. To keep frame support posts
close to walls, Philips installers can extend one of the frame support posts from 20" to
36" in either the X or Y direction from the normal post position (Figure 2-2 & 2-3).
8 Ft Skylight
Equipment Sizes (9 ft and 8 ft Skylights)
W x D x H Wt
Skylight System1 11'-10" x 13'-6" see Fig 2-4 & 2-5 see pg 6-3 361cmx 411cm
PegBlade CPU 18" x 18" x 5" 27lb
(placed on customer’s desktop) 46cm x 46cm x 13cm 12kg
PegBlade monitor 20" x 20" x 20" 69lb
(placed on customer’s desktop) 51cm x 51cm x 51cm 32kg
Codonics Printer (option) 17" x 21" x 12" 55lbs
(placed on customer’s desktop) 43cm x 53cm x 30cm 25kg
Important: Unless the floor is a reinforced concrete slab poured on grade, a licensed
structural engineer must
_______
1
At installation, Philips must lay a 11'-9.3" x 13'-5.4" rectangular metal drill template on the floor
(see Section3). There must be no objects at floor level to interfere with this template.
evaluate floor loading capacity. See Section 6.
2-1
Section 2: Room Layout
Minimum (12'-6" x 14') Room Restrictions:
• Anchor plate for frame support posts placed 1"
from wall on side of Two-Drawer Collimator Exchanger
(instead of more desireable 3" placement),
• Acquisition Terminal placed outside of room,
• Processing Station placed in separate, nearby room,
• Display Panel and Boom tied in one position
(instead of allowing desireable free rotation of boom),
• Doors cannot swing into room.
12'-6" (381cm)
From Main
Electrical
Panel
1" (3cm)*
4" (10 cm)*
Collimator Exchanger:
Drawer #1 & Drawer #2
J
Power
Tower
11'-10" (361cm)
Two Drawer:
6'-9" (206 cm)
PC
Tower
Preferred side
of table for
patient access
4" (10 cm)*
Anchor Plate for Frame
Support Post (4 places)
Opening must be
curtain, sliding
door or pocket
door which does
not open into
Skylight frame.
C
L
Frame
14' (427cm)
13'-6" (411cm)
Patient Table
6'-9" (206 cm)
5'-11" (180 cm)
5"
(13 cm)*
* For a 9' Seismic Skylight,
all anchor plates must be at least 8" from all walls.
For an 8'
all anchor plates must be at least 6" from all walls.
J
Electrical Junction Box for hardwiring to 10' Skylight cord
Circuit Breaker, 208-240 VAC, 30 Amp, single phase