DocumentCode :
1144157
Title :
Axial Resolution and the Value of Interpolating Scan in Multislice Positron Computed Tomography
Author :
Senda, Michio ; Yonekura, Yoshiharu ; Tamaki, Nagara ; Tanaka, Yasufumi ; Komori, Masaru ; Minato, Kotaro ; Konishi, Junji ; Torizuka, Kanji
Volume :
4
Issue :
1
fYear :
1985
fDate :
3/1/1985 12:00:00 AM
Firstpage :
44
Lastpage :
51
Abstract :
We have calculated the aperture function of a positron computed tomograph (PCT) with computer simulation, and evaluated the axial resolution of a multislice PCT, Positologica III, both theoretically and experimentally. The axial point spread function (PSF) was approximately a triangle at or near the center of the field, and the sensitivity for the slice decreased significantly as the source moved away off the image plane. Accordingly, there were low sensitivity areas between an in-plane and the adjacent cross-plane. This invisible region was clinically significant if the object was thin enough in the z-axis. In order to fill up the gaps between adjacent slices, it is valuable to move the patient half the slice interval in the z-axis and perform an " interpolating scan."
Keywords :
Apertures; Computed tomography; Computer simulation; Crystals; Gamma ray detection; Gamma ray detectors; Gamma ray effects; Positrons; Scattering; Solids;
fLanguage :
English
Journal_Title :
Medical Imaging, IEEE Transactions on
Publisher :
ieee
ISSN :
0278-0062
Type :
jour
DOI :
10.1109/TMI.1985.4307692
Filename :
4307692
Link To Document :
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