Monday, April 27, 2015

Slice registration in unequal detector width scanners

The registration of a certain slice width depends on:

a/ selective activation and combination of detector signals into 4 channels.

b/ precise collimation which sometimes covers parts of the detectors.

Example A/ For 4X5 mm collimation the incoming radiation from the three innermost detectors on each side are summed up into slice B and slice C.

Example B/ For 4X1 mm collimation the next but innermost detectors on each side are partially covered by the collimators thus allowing only a 1 mm wide x-ray beam to hit the 1.5 mm wide detectors.

image

ct scan machines of detector

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Slice registration in unequal detector width scanners
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