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CHAPTER
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Low Contrast Test
(Optional)
This chapter describes how to use the low contrast section of
the phantom set and how to do the low contrast test.
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The availability of the low contrast test is country-specific. It has
to be activated by Siemens Service.
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Low contrast phantom sec-
tion
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The low contrast phantom section consists of a 165 mm diame-
ter, 25 mm thick, water-equivalent, brown plastic cylinder. A
clear plastic insert at the center contains three sets of low con-
trast pins (with diameters of 3, 4, and 5 mm, each set with 4
pins), together with two 20 mm diameter measurement areas.
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Schematic diagram
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The two 20 mm diameter measurement areas are used to estab-
lish low contrast differences between the pins and the sur-
rounding area. The rated contrast between the pins and the sur-
rounding area is 6 HU 1 HU (0.6% 0.1% contrast).
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