X-ray computed tomography apparatus and multi-spectra correction using a radiation pre-filter
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United States of America Patent
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May 11, 2004
Grant Date -
Mar 20, 2003
app pub date -
Oct 10, 2002
filing date -
Sep 29, 2000
priority date (Note) -
Expired
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Abstract
An X-ray computed tomography apparatus has a beam filter arrangement with regions of different filter material or/and different thickness profile of the filter material. This beam filter arrangement is disposed in the beam path preceding an examination subject. For multi-spectra beam hardening correction with estimation of the base material lengths, the computed tomography apparatus is fashioned for implementing projections of the examination subject with different effective material thickness or/and different effective material of the beam filter arrangement.
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