Selecting the Optimum
Digital Mammography Monitor
Requirement
1
Requirement
2
Requirement
3
Requirement
4
Requirement
5
High-Resolution
High resolutions are required to display the correct
“information volume” of a digital mammography image.
High-Definition & High-Density
For the detection of mammary gland disorders which
appear as “distortion,” the monitor needs this required
performance in order to display the subtle structures.
Multi-Grayscale
For the detection of small tumors which appear as delicate
“density” differences, the monitor needs the correct display
of extremely subtle grayscale shadings.
Image Sharpness
For detection of subtle masses and calcifications, the
monitor needs to display the outlines of the images with a
high degree of sharpness.
Brightness Uniformity
For correct luminance display of delicate “density”
differences, the monitor needs uniformity in brightness
across the entire screen.
Requirement
DICOM Part 14 Compliance
with Quality Control Software
6
Requirement
7
1
For unified image display between multiple monitors, the monitor is
required to adjust the characteristics to the grayscale standard DICOM
Part 14 through calibration.
Simple Quality Control Procedures
Quality characteristics gradually change over time and therefore in order to
maintain a consistent display, the monitor needs to be quality-controllable.
2
MONOCHROME
LCD MONITOR
Featuring high-resolution, high-definition and multi-grayscale, the RadiForce GS520 is Featuring high-resolution, high-definition and multi-grayscale, the RadiForce GS520 is
designed specifically for digital mammography with a choice of distinctive glare panel to designed specifically for digital mammography with a choice of distinctive glare panel to
meet diversified environment usage.meet diversified environment usage.
High-Resolution for Delicate Grayscale Shadings
When selecting a monitor, it’s important to consider the “information
volume” of the medical images to be displayed.
1760
Medical
Images
(Example)
Monitor
Resolution
Requirement
1
1000
1000
DSA
1280
024
1
512
512
CT
1200
1600
2150
Chest CR
1536
2048
“Information volume” of a digital mammography image
should exceed 5 million pixels. When a lower resolution
monitor displays this “information volume,” the monitor
1914
2294
Mammography
2048
560
2
stretches the information forcing the mosaic to appear as shadings.
With a 2048 x 2560 resolution or 5.24 million pixels, the stretching
effect is minimized and the mosaic becomes suitable for rendering
subtle masses and calcifications, within the mammography image.
2048
5.24 million
Digital
Mammography
pixels
3.14 million
pixels
Displaying
only 72%
2560
2048
1536
Enlarged Image
Enlarged Image
High-Definition and High-Density with Minute Pixels
0.165mm pixel size is the smallest pixel size among current
Requirement
EIZO medical monitors providing high-definition and high-
2
density
display without shadings
appearing granular.
0.249mm 0.207mm 0.165mm
Pixel Size Comparison
12-Bit Simultaneous Grayscale Display
Along with EIZO's new frame rate control technology
Requirement
(patent pending), 4,096 (12-bit) grayscale tones can be
3
displayed simultaneously from an abundant palette of
13,771 tones for high-definition digital mammography.
12-bit graphics board and 12-bit viewer software needed for 12-bit display.
8bit 256 Tones Image 12 b i t4,096 Tones Image
Distinctive Glare Panel
Many current monitors use anti-glare panels, which have a waffled
surface to diffuse the reflection of surrounding light. However, this
also diffuses the light from the monitor’s backlight, which affects the
outline of an image, causing a viewing strain on the observer. With a
distinctive glare panel, there is no diffused reflection by the waffled
surface, and the outline of the image is displayed more clearly.
Therefore, the subtle images such as calcification and masses will be
easier to observe reducing the strain on the observer.
Please note that the reflection of surrounding light may increase when used in a bright environment.
Available with either a glare panel (GS520-CLG, GS520-BLG) or anti-glare panel (GS520-CL, GS520-BL).
Incoming
Light
Reflections
Light from Backlight Light from Backlight
Anti-Glare Panel
Incoming
Light
Reflections
Glare Panel
Sharper Resolution for Clearer Image Outline
Requirement
the anti-glare panel meaning the
glare panel can be expected to
display the outline of a detailed
image more sharply.
MTF (Modulation Transfer Function) is a parameter to
define the display sharpness and resolution of a monitor
4
panel. The glare panel has better MTF characteristics than
Provided by Anjo Kosei Hospital
1.2
1
0.8
0.6
MTF
0.4
0.2
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
Spatial Frequency (Line pairs/mm)
Glare Panel
Anti-Glare Panel
DUE for Brightness Uniformity
To sustain image consistency, brightness uniformity is
Requirement
required for medical imaging monitors. However, unified
5
luminance of the backlight is difficult to attain due to the
characteristics of LCD monitors. The Digital Uniformity Equalizer
(DUE) function provides optimum backlight luminance uniformity.
Without DUE With DUE
100%
70%
lower
CCD Camera
Brightness Map
Input Level 80% = 204/255
100%
70%
lower
CCD Camera
Brightness Map
Input Level 80% = 204/255
Calibration Mode Selection
Selectable with the front panel buttons, the CAL Switch function
allows for various calibration modes of different modalities such as
digital mammography, CR, and CT images. Furthermore, with
ScreenManager Pro for Medical installed, auto mode settings can be
made with the Auto CAL Switch function.
Change modes
with one touch.
Mammo Mode
Brightness : 500 cd/m
Grayscale : DICOM Part 14
CR Mode CT/MRI Mode
2
Brightness : 450 cd/m
Grayscale : DICOM Part 14
2
Brightness : 350 cd/m
Grayscale : γ= 2.2
2
Brightness Stabilization
At startup or upon wakeup, the EIZO patented drift correction
function quickly stabilizes the brightness level. In addition, a sensor
measures the backlight brightness and compensates for brightness
fluctuations caused by the ambient temperature and the passage of time.
This brightness stabilization function is EIZO patented technology (Japan patent numbers 3171808 and
3193315, US patent number 6188380).
Brightness (cd/m2)
Other Manufacturer's Monitor
with Drift Correction
Main Board
EIZO RadiForce Monitors
with Drift Correction
Seconds
Drift Correction Comparison
Backlight
Sensor
Hole for
Light
Transmission
Backside
of Panel
Backlight Saver
With ScreenManager Pro for Medical utility software
installed, the Backlight Saver function allows for the monitor’s
backlight to turn off when the screen saver is activated and
the monitor’s backlight to turn on when the computer comes
out of the screen saver mode. This function helps to reduce
power consumption when the monitor is used for a prolonged
period of time.
RegularUse
18 hours / day
Cuts power consumption
by 11%
16 hours / day
Backlights
switch off
automatically
2 hours
Compatibility with Various Graphics Boards
Supports various input signals for compatibility with a wide
range of graphics boards so the user can select the board
according to budget and performance requirements. This
includes single link and dual link signals, as well as packedpixel signal for users requiring 12-bit or 10-bit simultaneous
display.
Full 5-Year Warranty
EIZO and its authorized distributors offer a five-year
limited warranty for RadiForce GS520.
Brightness Stability Within Usage Time Guaranteed
EIZO's confidence in its product quality extends to brightness
stability which is also covered during the usage time specified in the
warranty.
Same Brightness !
3
4
Displaying the Optimum Digital Mammography Image
EIZO offers all the necessary components for correct digital mammography image display.
Accessories
Dual Height Adjustable Stand
Digital Mammography Monitor
●An option of An option of clear clear base and base and
blueblue base backlights are available. base backlights are available.
●Paired monitors which provides the same Paired monitors which provides the same
color and grayscale for two monitors co l o r an d gr a y scal e fo r two moni t o rs
bundled as a pair in one box, also available.bundled as a pair in one box, also available.
Standard Configuration
Quality Control Sensor
Once attached to the top of the monitor the
Clip-On Swing Sensor G1 can remain in place
and is ready for use. This saves the time and
trouble of attaching
and removing it
whenperforming
quality control tasks.
Quality Control Tool
EIZO's easy-to-use RadiCS quality control
software performs precise calibration conforming
to DICOM Part 14 and enables quality control
complying with ACR Practice Guideline and
other QC standard for digital mammography
monitors.
Mount two panels in either portrait or landscape
orientation.
Panel Protector
Protect against scratches and dust with high light
transmission panel.
Monitor Cleaning Kit
Keep your screen free from dust and fingerprints with
this screen cleaner kit. Includes pump spray and cloth.
(Bundled with GS520-CLG and GS520-BLG.)
Quality Control of Digital Mammography Monitor
As with the use of film mammography, image quality testing of
the monitor at installation and regularly during use should be
carried out. This ensures that the monitor maintains a consistent
display of quality digital mammography.
■ACR “Practice Guideline for Determinants of Image
Quality in Digital Mammography”
A guideline established by the American College of Radiology
(ACR) in cooperation with the American Association of
Physicists in Medicine (AAPM), Radiological Society of North
America (RSNA), and Society for Imaging Informatics in
Medicine (SIIM).
High-Performance Graphics Board
Four options are available:
Bit
Compatible Operating System
Frame Buffer Memory
Maximum Disply Resolutions
Output Terminals
Scanning Frequency (H, V)
Maximum Power Consumption
5
Bus Interface
12-bit /10-bit / 8-bit
Windows XP / 2000 Professional
128 MB
PCI 32-bit (33 MHz / 66 MHz)
2048 x 2560
DVI-I x 2
Dot Clock
Up to 148 MHz
103.9 kHz
50 Hz
16.8 watts
10-bit / 8-bit
Windows XP / 2000 Professional
256 MB
PCI 32-bit (33 MHz) / 64-bit (66 MHz)
2048 x 2560
DVI-I x 2
Up to 148 MHz
103.9 kHz
50 Hz
40 watts
8-bit
Windows XP
1 GB
PCI Express x 16
2048 x 2560
DVI-D x 2
214.25 MHz
131 kHz
50 Hz
75 watts
8-bit
Windows XP
256 MB
PCI Express x 16 / x 1
2048 x 2560
DVI-D x 2
162 MHz
75 kHz
60 Hz
22 watts
■EUREF “European Guidelines for Quality Assurance
in Breast Cancer Screening and Diagnosis”
A standard issued by the European Commission in
cooperation with the European Reference Organization for
Quality Assured Breast Screening and Diagnostic Services
(EUREF), and European Breast Cancer Network (EBCN),
European Society of Mastology (EUSOMA).
■PAS 1054
“Requirements and Testing of Digital Mammography
Equipment” established by the Normenausschusses
Radiologie (DIN NAR) in cooperation with the Deutschen
Röntgengesellschaft (DRG) and others. In line with the
QS-RL (Qualitätssicherungs-Richtlinie) quality assurance
ordinance, it is mandatory in Germany to refer to this
standard when conducting monitor quality assurance.
6
54 cm 21.3"
Monochrome LCD Monitor
Model Variations
Cabinet Color
Panel
Active Display Size (H x V)
Viewable Image Size
Native Resolution
Pixel Pitch
Grayscale Tones
Viewing Angles (H, V)
Brightness
Recommended Brightness
for Calibration
Contrast Ratio
Response Time
Scanning Frequency (H, V)
Dot Clock
Input Signals
Input Terminal
USB Ports
USB Standard
Power Requirements
Power Consumption
Power Save Mode
Sensor
Power Management
OSD Languages
Net Weight
Hole Spacing
Certifications and Standards
Supplied Accessories
GS520-CLG: Clear Base with Glare Panel
GS520-BLG: Blue Base with Glare Panel
GS520-CL: Clear Base
GS520-BL: Blue Base
Black
TFT Monochrome LCD Panel (IPS)
337.9 x 422.4 mm
Diagonal: 540 mm
2048 x 2560
0.165 x 0.165 mm
4,096 from a palette of 13,771 tones
170°, 170°
2
700 cd/m
(typical)
2
500 cd/m
800:1 (typical)
100 ms (typical)
31- 135 kHz, 19-51 Hz
Frame synchronous mode: 49 - 51 Hz
300 MHz
DVI Standard 1.0
DVI-D 24 pin
1 upstream, 2 downstream
Standard Rev. 2.0
AC 100 -120 V, 200 -240 V: 50 / 60 Hz
90 watts
Less than 1.2 watts
Backlight Sensor
DVI DMPM
English, French, German, Italian, Japanese,
Simplified Chinese, Spanish, Swedish,
Traditional Chinese
With Stand: 9.6 kg
Without Stand: 6.6 kg
VESA standard (100 x 100 mm)
CE (Medical Device Directive), TÜV/GM
(EN60601-1), cTÜVus (UL60601-1, CSA C22.2
No. 601-1), CB (IEC60601-1), VCCI-B, FCC-B,
Canadian ICES-003-B, c-Tick, FDA 510(k) for
Mammography and General Radiography,
RoHS
AC power cord, user's manual, signal cable
(DVI-D ~ DVI-D), USB cable, EIZO LCD Utility
Disk (RadiCS LE, ScreenManager Pro for
Medical software), ScreenCleaner (GS520-CLG,
GS520-BLG only), warranty card
EIZO NANAO CORPORATION supports Pink Ribbon activities.
Dimensions
[
Unit: mm
35°35
]
°
Height Adjustment 82
512.5
272.5
32.5
325.5
388
340
90°
40°
88
61.5
424
480
17.6
208.5
Copyright © 2008 EIZO NANAO CORPORATION. All rights reserved.
(
080202) Printed in Japan, 2, 2008, 3.5K
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