Selecting the Optimum
Digital Mammography Monitor
Requirement
High-Resolution
High resolutions are required to display the correct
“information volume” of a digital mammography image.
1
High-Definition & High-Density
For the detection of mammary gland disorders which
Requirement
appear as “distortion,” the monitor needs this required
2
performance in order to display the subtle structures.
Multi-Grayscale
For the detection of small tumors which appear as delicate
Requirement
“density” differences, the monitor needs the correct display
3
of extremely subtle grayscale shadings.
Image Sharpness
For detection of subtle masses and calcifications, the
Requirement
monitor needs to display the outlines of the images with a
4
high degree of sharpness.
Brightness Uniformity
For correct luminance display of delicate “density”
Requirement
differences, the monitor needs uniformity in brightness
5
across the entire screen.
DICOM Part 14 Compliance
with Quality Control Software
For unified image display between multiple monitors, the monitor is
required to adjust the characteristics to the grayscale standard DICOM
Part 14 through calibration.
Requirement
6
Requirement
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.
7
1
2
MONOCHROME
LCD MONITOR
Featuringg high-resolution, hiigh-defiinition and muulti-graysscale, thee RadiForcce GS520 is
designed specifically for diggiittaall mmaammmmooggrraapphhyy wwiitthh aa cchhooiiccee ooff ddiissttiinnccttiivvee ggllaarree ppaanneell ttoo
meet diversified environment usage.
Backlight Saver
High-Resolution for Delicate Grayscale Shadings
12-Bit Simultaneous Grayscale Display
DUE for Brightness Uniformity
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.
When selecting a monitor, it’s important to consider the “information
volume” of the medical images to be displayed.
Along with EIZO's new frame rate control technology
(patent pending), 4,096 (12-bit) grayscale tones can be
displayed simultaneously from an abundant palette of
Requirement
To sustain image consistency, brightness uniformity is
required for medical imaging monitors. However, unified
luminance of the backlight is difficult to attain due to the
Requirement
3
5
1914
1760
13,771 tones for high-definition digital mammography.
characteristics of LCD monitors. The Digital Uniformity Equalizer
(DUE) function provides optimum backlight luminance uniformity.
1000
Medical
Images
(Example)
12-bit graphics board and 12-bit viewer software needed for 12-bit display.
512
Without DUE
With DUE
D S A
1280
C T
Chest CR
Mammography
100%
100%
1536
2048
1200
Regular Use
Cuts power consumption
by 11%
2 hours
70%
70%
Monitor
Resolution
lower
lower
8bit
256 Tones Image
4,096 Tones Image
12 bit
18 hours / day
16 hours / day
Backlights
switch off
automatically
=
=
Input Level 80% 204/255
CCD Camera
Brightness Map
Input Level 80% 204/255
CCD Camera
Brightness Map
Distinctive Glare Panel
“Information volume” of a digital mammography image
should exceed 5 million pixels. When a lower resolution
monitor displays this “information volume,” the monitor
Requirement
Calibration Mode Selection
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.
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.
1
Compatibility with Various Graphics Boards
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.
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 packed-
pixel signal for users requiring 12-bit or 10-bit simultaneous
display.
Mammo Mode
CR Mode
CT/MRI Mode
2048
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).
5.24million
pixels
Incoming
Light
Light from Backlight
Light from Backlight
Incoming
Light
Change modes
with one touch. Brightness : 500 cd/m2
Enlarged Image
Brightness : 450 cd/m2
Grayscale : DICOM Part 14 Grayscale : DICOM Part 14 Grayscale : γ=2.2
Brightness : 350 cd/m2
1536
Reflections
Reflections
Digital
Mammography
Full 5-Year Warranty
3.14 million
pixels
Brightness Stabilization
Displaying
only 72%
EIZO and its authorized distributors offer a five-year
limited warranty for RadiForce GS520.
Anti-Glare Panel
Glare Panel
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.
Enlarged Image
Sharper Resolution for Clearer Image Outline
High-Definition and High-Density with Minute Pixels
Brightness Stability Within Usage Time Guaranteed
MTF (Modulation Transfer Function) is a parameter to
define the display sharpness and resolution of a monitor
panel. The glare panel has better MTF characteristics than
Requirement
0.165mm pixel size is the smallest pixel size among current
EIZO medical monitors providing high-definition and high-
density display without shadings appearing granular.
Requirement
This brightness stabilization function is EIZO patented technology (Japan patent numbers 3171808 and
3193315, US patent number 6188380).
EIZO's confidence in its product quality extends to brightness
stability which is also covered during the usage time specified in the
warranty.
4
2
Brightness (cd/m2)
the anti-glare panel meaning the
glare panel can be expected to
display the outline of a detailed
image more sharply.
Provided by Anjo Kosei Hospital
Other Manufacturer's Monitor
with Drift Correction
1.2
Glare Panel
Anti-Glare Panel
1
0.249 mm
0.207 mm
0.165 mm
Main Board
0.8
0.6
0.4
0.2
0
Same Brightness !
EIZO RadiForce Monitors
with Drift Correction
Backlight
Sensor
Pixel Size Comparison
Hole for
Light
Transmission
0.0
0.5
1.0
1.5
2.0
2.5
3.0 3.5
Seconds
Drift Correction Comparison
Backside
of Panel
Spatial Frequency (Line pairs/mm)
3
4
Displaying the Optimum Digital Mammography Image
Accessories
EIZO offers all the necessary components for correct digital mammography image display.
Dual Height Adjustable Stand
Quality Control Sensor
Digital Mammography Monitor
Mount two panels in either portrait or landscape
orientation.
● An opttion of clear baase and
blue base backlights are available.
Panel Protector
● Paired monitors which provides the same
color andd grayscalle for twoo mmonitors
bundlled as aa pair in onee box,, alsoo aavailable.
Protect against scratches and dust with high light
transmission panel.
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
Monitor Cleaning Kit
and removing it
whenperforming
quality control tasks.
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.)
Standard Configuration
Quality Control Tool
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.
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.
■ 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).
■ EUREF “European Guidelines for Quality Assurance
in Breast Cancer Screening and Diagnosis”
High-Performance Graphics Board
Four options are available:
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
Bit 12-bit /10-bit / 8-bit
Compatible Operating System Windows XP / 2000 Professional
Frame Buffer Memory 128 MB
Bus Interface PCI 32-bit (33 MHz / 66 MHz)
Maximum Disply Resolutions 2048 x 2560
Output Terminals DVI-I x 2
Dot Clock Up to 148 MHz
Scanning Frequency (H, V) 103.9 kHz
50 Hz
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
8-bit
Windows XP
1 GB
PCI Express x 16
2048 x 2560
DVI-D x 2
214.25 MHz
131 kHz
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
“ 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.
50 Hz
75 watts
Maximum Power Consumption 16.8 watts
40 watts
5
6
54 cm 21.3"
Monochrome LCD Monitor
Model Variations
GS520-CLG: Clear Base with Glare Panel
GS520-BLG: Blue Base with Glare Panel
GS520-CL: Clear Base
GS520-BL: Blue Base
Cabinet Color
Black
Panel
TFT Monochrome LCD Panel (IPS)
337.9 x 422.4 mm
Diagonal: 540 mm
2048 x 2560
Active Display Size (H x V)
Viewable Image Size
Native Resolution
Pixel Pitch
0.165 x 0.165 mm
4,096 from a palette of 13,771 tones
170°, 170°
Grayscale Tones
Viewing Angles (H, V)
Brightness
700 cd/m2 (typical)
500 cd/m2
Recommended Brightness
for Calibration
Contrast Ratio
800:1 (typical)
Response Time
100 ms (typical)
Scanning Frequency (H, V)
31-135 kHz, 19-51 Hz
Frame synchronous mode: 49 - 51 Hz
Dot Clock
300 MHz
Input Signals
DVI Standard 1.0
DVI-D 24 pin
Input Terminal
USB Ports
1 upstream, 2 downstream
Standard Rev. 2.0
AC 100-120 V, 200-240 V: 50 / 60 Hz
90 watts
USB Standard
Power Requirements
Power Consumption
Power Save Mode
Sensor
Less than 1.2 watts
Backlight Sensor
DVI DMPM
Power Management
OSD Languages
English, French, German, Italian, Japanese,
Simplified Chinese, Spanish, Swedish,
Traditional Chinese
Net Weight
With Stand: 9.6 kg
Without Stand: 6.6 kg
Hole Spacing
VESA standard (100 x 100 mm)
Certifications and Standards
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
EIZO NANAO CORPORATION supports Pink Ribbon activities.
Supplied Accessories
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
[
]
Dimensions Unit:mm
388
340
40°
88
61.5
Height Adjustment 82
90°
°
°
35
35
Copyright © 2008 EIZO NANAO CORPORATION. All rights reserved.
17.6
325.5
208.5
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080202 Printed in Japan, 2, 2008, 3.5K
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