Motion Correction in PET/CT Images.
- Author:
Sang Keun WOO
1
;
Gi Jeong CHEON
Author Information
1. Molecular Imaging Research Center, Radiological and Medical Sciences Research Institute, Korea Institute of Radiological and Medical Sciences, Seoul, Korea. larry@kcch.re.kr
- Publication Type:Review
- Keywords:
PET/CT;
motion;
registration;
motion correction;
respiratory motion;
attenuation correction
- MeSH:
Positron-Emission Tomography and Computed Tomography
- From:Nuclear Medicine and Molecular Imaging
2008;42(2):172-180
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PET/CT fused image with anatomical and functional information have improved medical diagnosis and interpretation. This fusion has resulted in more precise localization and characterization of sites of radio-tracer uptake. However, a motion during whole-body imaging has been recognized as a source of image quality degradation and reduced the quantitative accuracy of PET/CT study. The respiratory motion problem is more challenging in combined PET/CT imaging. In combined PET/CT, CT is used to localize tumors and to correct for attenuation in the PET images. An accurate spatial registration of PET and CT image sets is a prerequisite for accurate diagnosis and SUV measurement. Correcting for the spatial mismatch caused by motion represents a particular challenge for the requisite registration accuracy as a result of differences in PET/CT image. This paper provides a brief summary of the materials and methods involved in multiple investigations of the correction for respiratory motion in PET/CT imaging, with the goal of improving image quality and quantitative accuracy.
