96 | Dome CXtra
Test Patterns Service
You can view a variety of test patterns for assessing image quality
using the Test Patterns service. Two categories of test patterns are
installed with the service:
• AAPM (American Association of Physicists in Medicine) TG18
• Miscellaneous patterns such as SMPTE, horizontal and vertical
ramps, and geometric distortions
You can also import custom test patterns in .DCM, .DC3, .JPG, or
.TIF formats, as well as perform visual and interactive evaluations.
NOTE: You can manage custom test patterns only if the program
feature for doing so has been installed.
AAPM TG18 Test Patterns
AAPM TG18 patterns provided with the Test Patterns service are
described in American Association of Physicists in Medicine (AAPM),
Task Group 18 Assessment of Display Performance for Medical
Imaging Systems Pre-print Draft (v9.0), October 9, 2002.
Different pattern sets allow you to assess six different display
characteristics. The table on page 97 shows the six sets of AAPM
TG18 patterns provided with Test Patterns service. Most patterns
are available in a1024 x 1024 size and some are available in a
2048 x 2048 size.
Miscellaneous Test Patterns
The following miscellaneous test patterns are installed with
Test Patterns service.
• Bull’s-eye • Horizontal
Ramp
• Geometrical Distortions Coarse
• Single pixel
• Geometrical Distortions Fine
• SMPTE
• Geometrical Distortions Hs
• Vertical Ramp
