THE ACCURACY OF SPECT BRAIN ACTIVATION IMAGES - PROPAGATION OF REGISTRATION ERRORS

被引:5
|
作者
SYCHRA, JJ
PAVEL, DG
CHEN, Y
JANI, A
机构
[1] University of Illinois Hospital, Department of Radiology, Room 2500, 1740 West Taylor Street, Chicago
关键词
D O I
10.1118/1.597412
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
Functional single photon emission computed tomography (SPECT) images of brain activation are based on a comparison of base line and activation images. The correctness of the functional images depends, among other factors, on the accurate spatial registration (alignment) of the base line and activation image data. The relationship between the registration errors and the errors of the resulting functional images is studied. It is shown that misregistration errors as small as a shift by 1/8 pixel or rotation by 1 degrees result in 5%-10% errors of the pixel values of functional SPECT images of regional blood flow (the ratio and the relative difference images).
引用
收藏
页码:1585 / 1590
页数:6
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