GE Healthcare Brivo XR118, Руководство по обслуживанию

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GE H
EALTHCARE
D
IRECTION
5461425-8EN, R
EVISION
6 B
RIVO
XR118 S
ERVICE
M
ANUAL
Chapter 6 - - Calibration Page 153
PACS / Image Display Test Image
The 12 bands on the left side each have a different brightness. The top six should appear
“dark” and the bottom six “bright”.
Inside each band are five small squares with different intensities (like the 5% / 95% squares in
a SMPTE pattern). The squares provide a quantitative way to compare two images and report
how the PACS Test Images appear.
3.) Testing for an Equal Number of Bands
For the Additional Tests section below, record the following for each image:
a.) The number of distinct bright & dark bands (based on the band intensity)
b.) The number of squares visible in each band For example, if the ramp appears as:
Note: Count bands with distinct gray levels, not simply the number of bands with visible
squares.
For example, if the ramp appears as: