NDLI: 3D geometric normalization for the high resolution quad-HIDAC PET scanner

Content Provider	IEEE Xplore Digital Library
Author	Huaxia Zhao Reader, A.J.
Copyright Year	2002
Description	Author affiliation: Dept. of Instrum. & Anal. Sci., Univ. of Manchester Inst. of Sci. & Technol., UK (Huaxia Zhao; Reader, A.J.)
Abstract	The high sensitivity, high resolution, quad-HIDAC PET scanner consists of 4 main detector banks which each contain either 4 or 8 detector modules, with 2 converter planes in each module. Coincidences are collected between opposite detector banks only, and not all lines of response (LORs) which are measurable by the system pass through the same number of detector planes, due to the finite axial extent of the stack of detector planes. Therefore, in order to utilize all the acquired data, it is necessary to account for this sensitivity variation for the system LORs. Existing reconstruction methods for the quad-HIDAC have not accounted for this, resulting in typically /spl sim/14% of the data being rejected in the 16-module quad-HIDAC and /spl sim/24% being rejected in the 32-module quad-HIDAC. This work presents the sensitivity calculation which is necessary to compensate for under-sampled LORs, by evaluating the solid angle as a function of position throughout the field of view - which gives rise to a correction scheme for incorporation into iterative list-mode reconstruction algorithms. This allows all the acquired data to be used in the image reconstruction process.
Starting Page	1142
Ending Page	1146
File Size	346084
Page Count	5
File Format	PDF
ISBN	0780373243
ISSN	10823654
DOI	10.1109/NSSMIC.2001.1009752
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-11-04
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Positron emission tomography Detectors Geometry Image reconstruction Reconstruction algorithms Solids Transmission line matrix methods Biomedical measurements Helium Animals
Content Type	Text
Resource Type	Article

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