NDLI: Influence of collimator hole dimensions on parallel and cone-beam brain SPECT

Content Provider	IEEE Xplore Digital Library
Author	Kamphuis, C. Beekman, F.J. Hutton, B.F.
Copyright Year	2000
Description	Author affiliation: Image Sci. Inst., Utrecht Univ. Hospital, Netherlands (Kamphuis, C.)
Abstract	This study assesses the influence of collimator hole dimensions on the accuracy of brain SPECT. To this end, four low energy, parallel hole (PH) collimators and four low energy, half cone beam (CB) collimators with different hole dimensions were simulated. The simulated projection data were representative of Ultra High Resolution (UHR), High Resolution (HR), Medium Resolution (MR), and General Purpose (GP) collimators. Reconstruction was performed with the Ordered Subsets Expectation Maximization (OS-FM) algorithm with and without correction for the camera response (CRC and NCRC, respectively). The distance-dependent blurring kernel used in CRC matched the blurring used in the simulations. Image accuracy was assessed by calculating contrast-to-noise ratios (CTN) in a phantom containing cold spheres and by calculating Mean Squared Errors (MSE) between the true 3D Hoffman brain phantom and its reconstructions. For the accuracy of PH collimators, results indicate that when NCRC is applied, the UHR collimator results in better CTN ratios and lower MSE than the collimators with lower resolution. However, when CRC is applied, the GP collimator outperforms the higher resolution collimators. For the CB collimators, the low resolution collimators (GP and MR) result in the best CTN ratios and the lowest MSE, regardless if CRC is applied.
Starting Page	1047
Ending Page	1051
File Size	499468
Page Count	5
File Format	PDF
ISBN	0780356969
ISSN	10823654
DOI	10.1109/NSSMIC.1999.845841
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1999-10-24
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Collimators Image reconstruction Cyclic redundancy check Brain modeling Energy resolution Cameras Imaging phantoms Signal resolution Hospitals Medical simulation
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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