Platform Requirements

1. On-Site Server – Standard Rack Unit

 

Standard Rack Unit is recommended to Level 3 Hospitals.

 

CPU Minimum Recommended
Form Factor

Rack Unit

Standard 2U Form Factor Server Case

Rack Unit

Standard 2U Form Factor Server Case

Processor Intel Skylake Quad Core I7 Intel 4Core Xeon at least 3.2Ghz
Memory 16 GB RAM 32 GB RAM
UPS

Redundant 500W 2U power supply

Hot swappable power supply

Smart UPS

Redundant 500W 2U power supply

Separate Smart UPS 2000W

Hot swappable power supply

Graphics On-board graphics card On-board graphics card
Hard Drive

Motherboard with RAID controller supporting RAID6

RAID 0, 1, 5, 6 capable RAID controller

2 identical HDDs of at least 1TB for RAID 1 archive (4 drives for RAID 6 strongly recommended)*

*Size of the drive may vary depending on the number of modalities, volume of studies stored and how long you want to store the studies

Motherboard with RAID controller supporting RAID6

RAID 0, 1, 5, 6 capable RAID controller

2 identical HDDs of at least 1TB for RAID 1 archive (4 (or more) drives for RAID 6 strongly recommended)*

*Size of the drive may vary depending on the number of modalities, volume of studies stored and how long you want to store the studies

Network Controller Gigabit Ethernet LAN – 2 ports Gigabit Ethernet LAN – 2 ports
Operating System

Ubuntu Server 17.10

120GB SSD for OS

Ubuntu Server 17.10

2 pcs 120GB SSD for OS

(mirrored)

 

Considerations in choosing the type of server to install:

  • Number of concurrent users
  • Volume of cases
  • Required level of redundancy

 

2. On-Site Server – Standard Tower Unit

 

Standard Tower Unit is recommended to Diagnostic facilities, Level 1 and 2 Hospitals.

 

CPU Minimum Recommended
Form Factor Tower Unit Tower Unit
Processor Intel Skylake Quad Core I7 Intel Skylake Quad Core I7 or better
Memory 16 GB RAM 32 GB RAM
UPS

500 W Redundant power supply

Hot swappable power supply (if possible)

Smart UPS

500 W Redundant power supply

Hot swappable power supply (if possible)

Separate Smart UPS 2000W

Graphics On-board graphics card On-board graphics card
Hard Drive

Motherboard with RAID controller supporting RAID6

RAID 0, 1, 5, 6 capable RAID controller

2 identical HDDs of at least 1TB for RAID 1 archive (4 drives for RAID 6 strongly recommended)*

*Size of the drive may vary depending on the number of modalities, volume of studies stored and how long you want to store the studies

Motherboard with RAID controller supporting RAID6

RAID 0, 1, 5, 6 capable RAID controller

2 identical HDDs of at least 1TB for RAID 1 archive (4 (or more) drives for RAID 6 strongly recommended)*

*Size of the drive may vary depending on the number of modalities, volume of studies stored and how long you want to store the studies

Network Controller Gigabit Ethernet LAN – 2 ports Gigabit Ethernet LAN – 2 ports
Operating System

Ubuntu Server 17.10

120GB SSD for OS

Ubuntu Server 17.10

120GB SSD for OS

 

Considerations in choosing the type of server to install:

  • Number of concurrent users
  • Volume of cases
  • Required level of redundancy

 

3. On-Site Server – NUC server

 

NUC server is recommended to diagnostics clinics and level 1 hospitals.

 

CPU Minimum Recommended
Form Factor NUC platform NUC platform
Processor

INTEL NUC NUC6I3SYH

 

Intel Core I3 6100U processor

 

Intel HD 520/SODIMM DDR4/MSATA SSD/2.5″ HDD

HDMI/Mini-DisplayPort, USB3.0

WiFi, GLAN, Power Adapter

INTEL NUC NUC6I3SYH

 

Intel Core I3 6100U processor

 

Intel HD 520/SODIMM DDR4/MSATA SSD/2.5″ HDD

HDMI/Mini-DisplayPort, USB3.0

WiFi, GLAN, Power Adapter

Memory 16 GB RAM 32 GB RAM
Graphics On-board graphics card On-board graphics card
Hard Drive

125 GB SSD for the software

RAID 6 (NAS) – Storage*

*Size of the drive may vary depending on the number of modalities, volume of studies stored and how long you want to store the studies

125 GB SSD for the software

RAID 6 (NAS) – Storage*

*Size of the drive may vary depending on the number of modalities, volume of studies stored and how long you want to store the studies

Operating System Ubuntu Server 17.10 Ubuntu Server 17.10
UPS

500 W Redundant power supply

Smart UPS

500 W Redundant power supply

Smart UPS

 

Considerations in choosing the type of server to install:

  • Number of concurrent users
  • Volume of cases
  • Required level of redundancy

 

4.  Radiology Reading Station – Standard (all modalities, except Mammography)

 

CPU Minimum Recommended
Processor Intel Skylake Quad Core I7 Intel Skylake Quad Core I7
Memory 8 GB RAM 16 GB or higher
Graphics 1GB Video RAM, DirectX 10 compatible discrete graphics card with capability to support at least 2 monitors simultaneously

NVidia GT970 graphics card or better

1GB Video RAM, DirectX 10 compatible discrete graphics card with capability to support at least 2 monitors simultaneously

Hard Drive 125 GB SSD 250 GB SSD or higher
Browser Google Chrome 64-bit (standard across all operating systems) Google Chrome 64-bit (standard across all operating systems)
Operating System Windows, Mac OS, Linux, Android Windows, Mac OS, Linux, Android
Dual Monitor Options

Dual QHD monitors (2560 x 1440)

1 QHD monitor and 1 4k (UHD) monitor

1 WQHD + 1 HD

2 WQHD

2 HD

Dual QHD monitors (2560 x 1440)

1 QHD monitor and 1 4k (UHD) monitor

1 WQHD + 1 HD

2 WQHD

2 HD

 

5. Radiology Reading Station – NUC (all modalities, except Mammography)

 

CPU Minimum Recommended
Processor

Intel NUC NUC6I7KYK1

Intel Core I7 6770HQ

Intel Iris Pro 580/SODIMM DDR4/ MSATA SSD/2.5″ HDD

HDMI/Mini-DisplayPort/USB3.0

WiFi/GLAN/Power Adapter

Intel NUC NUC8i7HNK Hades Canyon

Intel Core i7-8705G

Radeon™ RX Vega M GL Graphics, 4GB HBM2, DDR4, 2x M.2

Memory 8 GB RAM 16 GB or higher
Hard Drive 125 GB SSD 250 GB SSD or higher
Browser Google Chrome 64-bit (standard across all operating systems) Google Chrome 64-bit (standard across all operating systems)
Operating System Windows, Mac OS, Linux Windows, Mac OS, Linux

Dual

Monitor

Options

Dual QHD monitors (2560 x 1440)

1 QHD monitor and 1 4k (UHD) monitor

1 WQHD + 1 HD

2 WQHD

2 HD

Dual QHD monitors (2560 x 1440)

1 QHD monitor and 1 4k (UHD) monitor

1 WQHD + 1 HD

2 WQHD

2 HD

 

6.  Dedicated Mammography Reading Station

 

CPU Minimum Recommended
Processor Intel Skylake Quad Core I7 Intel Skylake Quad Core I7
Memory 32 GB RAM 32 GB or higher
Graphics

1GB Video RAM, DirectX 10

compatible discrete graphics card with capability to support at least 2 monitors simultaneously

NVidia GT970 graphics card or better

1GB Video RAM, DirectX 10 compatible discrete graphics card with capability to support at least 2 monitors simultaneously

Hard Drive 250 GB SSD 250 GB SSD or higher
Browser Google Chrome 64-bit (standard across all operating systems) Google Chrome 64-bit (standard across all operating systems)
Operating System Windows, Mac OS, Linux Windows, Mac OS, Linux
Dual Monitor Options

Dual QHD monitors (2560 x 1440)

1 QHD monitor and 1 4k (UHD) monitor

Dual 1 4k (UHD) monitor

1 QHD monitor and 1 4k (UHD) monitor

 

7. Clerk and RadioTechnologist Workstation

 

CPU Minimum
Processor Intel Skylake Quad Core I7
Memory 8 GB RAM
Hard Drive 250 GB SSD
Brower Google Chrome 64-bit (standard across all operating systems)
Operating System Windows, Mac OS, Linux, Android
Monitor Full HD monitors (1920 x 1080 Pixel resolution)
Accessories

CD writer

Printer

 

 

 

1. Display characteristics:

a. Luminance response:

The brightness and contrast of grayscale medical images result from the luminance in relation to the image gray level values [8].

Ambient luminance (Lamb)​: When the power to the display device is off, the display surface will still show some brightness due to diffusely reflected room lighting. This is called the ambient luminance. The ambient luminance should be less than one-fourth of the luminance of the darkest gray level.
Minimum luminance (Lmin)​: Since the contrast response of the adapted human visual system is poor in very dark regions, the luminance of the lowest gray value, Lmin, should not be extremely low. The minimum luminance including a component from ambient lighting, L’min = Lmin + Lamb, should be at least 1.0 cd/m2 for diagnostic interpretation and 0.8 cd/m2 for other uses.
Maximum luminance (Lmax)​: The perceived contrast characteristics of an image depend on the ratio of Lmax (the luminance for the maximum gray value) to Lmin. This is the luminance ratio TECHNICAL STANDARD Electronic Practice / 9 (LR), which is not the same as the contrast ratio often reported by monitor manufacturers. Ideally, all display devices in a facility should have the same LR so that the presentation is consistent for all viewers of a study. The LR must be large for good image contrast; however, an excessively large LR will exceed the range of the adapted human visual system. A LR of 350, which is equivalent to a film OD range from 0.20 to 2.75, is effective. For acceptable contrast, LR should always be greater than 250. The Lmax of diagnostic monitors used for interpretation should be at least 350 cd/m2 with an L’min of 1.0 cd/m2. For the interpretation of mammograms, Lmax should be at least 420 cd/m2 with an L’min of 1.2 cd/m2. The monitors used for other purposes should have an Lmax of at least 250 cd/m2 with an L’min of 0.8 cd/m2. For brighter monitors, L’min, should be proportionately larger to maintain the same LR.
Luminance versus gray level​: In addition to having similar LR, the luminance of intermediate gray values between L’min and Lmax should follow the same response function for all monitors in a facility. It is recommended that the DICOM grayscale display function (GSDF) be used to set the intermediate gray values.
Calibration​: The luminance response, LR and GSDF, of some medical and professional graphics monitors can be selected using the monitor on screen display (OSD) controls. Other medical/professional devices require software from the monitor manufacturer to load look-up tables (LUTs) to the monitor that set the luminance of each gray level. For business class monitors used by technologists and clinical care staff, the calibration can be achieved by loading a LUT to the driver of the graphic control card.

2. Quality control​:

All display devices should be periodically checked to verify that the luminance response is

correct. Basic verification can be done using a visual test pattern designed for evaluating contrast response. Advanced tests, done on an annual or quarterly basis, measure the luminance in relation to gray value and evaluate the contrast. The contrast response of monitors used for diagnostic interpretation should be within 10% of the GSDF over the full LR. For other uses, the contrast response should be within 20% of the GSDF over the full LR.

3. White point​:

The color characteristics of a display with respect to the presented color space are not considered in this technical standard. However, the white point associated with presentation of grayscale images is important for medical imaging systems. It is recommended that monitors be set to a white point corresponding to the CIE daylight standard D65 white point. This corresponds to a color temperature of about 6,500 degrees K. b. Pixel pitch and display size The spacing of pixel structures, referred to as the pixel pitch, determines how much detail can be presented. The size of the active display region, in combination with pixel pitch, determines the number of pixels in the display device. While it has been common to classify monitors based on the number of pixels (i.e.,1 megapixel (MP), 2 MP, 3 MP, or 5 MP), it is recommended that the pixel pitch and display size be used when considering the capabilities of a particular device.

4. Pixel pitch​:

The pixel pitch of a monitor determines the maximum spatial frequency that can be presented in an image. Using the sampling theorem, the maximum spatial frequency that can be described by digital signals with a constant pitch, P in mm, is 1/(2P) cycles/mm. It is desirable to have the pixel pitch sufficiently small so as to present all of the spatial frequencies that the human visual system can perceive. At an arm’s length viewing distance (2/3 meter, 60 cm), the eye can perceive displayed spatial frequencies up to a maximum of 2.5 cycles/mm. For monitors used in diagnostic interpretation, it is recommended that the pixel pitch be about 0.200 mm and not larger than 0.210 mm. For this pixel pitch, individual pixels and their substructure are not visible and images have continuous tone appearance. No advantage is derived from using a smaller pixel pitch since higher spatial frequencies are not perceived.

5. Electronic Practice TECHNICAL STANDARD​:

For the presentation of images with acquired detector element size different from the pixel pitch, zoom and pan display features should be used rather than moving closer to a display. Since the human visual system has maximum contrast sensitivity at about 0.5 cycles/mm, image zoom with interpolation can often reveal subtle detail not seen at true size. Monitors used by technologists and clinical care staff are often not viewed at a desk, and the viewing distance is larger than for diagnostic interpretation. For these monitors, a pixel pitch of 0.250 mm (not larger than 0.300 mm) is appropriate.

6. Display size​:

When interpreting images, the attention of the viewer is not limited to the center of the display but extends to the edges as well via peripheral vision. Good visualization of the full scene is achieved when the diagonal display distance is about 80 percent of the viewing distance. At 2/3 meter, this corresponds to a diagonal size of 53 cm (21 inches). Monitors with a pixel array size of 1,500 x 2,000 and a pixel pitch of 0.210 will have a diagonal size of 52.5 cm. An aspect ratio, width to height, of 3:4 or 4:5 is well suited for the presentation of radiographic images. Such a portrait presentation requires image rotation from the graphic controller. However, the displays currently being manufactured typically have a wide format, 16:9 or 16:10. These can be used similar to a dual monitor workstation if the application software can present images in two regions with 8:9 or 8:10 aspect ratio.