NDLI: Step-and-shoot versus continuous helical pinhole SPECT for improved axial resolution

Content Provider	IEEE Xplore Digital Library
Author	Patil, N.H. Metzler, S.D.
Copyright Year	2004
Description	Author affiliation: Biomed. Eng. Dept., Duke Univ., Durham, NC, USA (Patil, N.H.)
Abstract	Pinhole SPECT provides high-resolution, high-sensitivity images of small animals and small human organs like the thyroid. Helical-orbit scans with continuous linear-stage motion and step-and-shoot camera motion have been used to provide complete sampling and improve the axial resolution compared to circular orbit scans. In step-and-shoot motion (SSM), the camera rotates by predefined steps; between the steps the stationary camera acquires projection data for a given scan time. The linear stage continues to move even when the camera is stepping. This may result in the loss of axial resolution. Experimental and simulation studies were performed. Combinations of SSM and continuous motion (CM) of the linear stage with SSM of the camera were compared for various number of views using 360 deg. circular orbit The axial resolution of the reconstructed images was evaluated for comparison. The difference in axial resolution achieved using CM and SSM of the linear stage is similar for experimental data. At the current axial resolution that has been achieved, SSM and CM acquisition yield similar resolutions. Independent improvements in axial resolution may show differences in axial resolution for the two acquisition methods. Using a 60-view scan might yield similar results to a 180-view scan at a reduced total acquisition time.
Starting Page	2422
Ending Page	2426
File Size	808211
Page Count	5
File Format	PDF
ISBN	0780387007
ISSN	10823654
e-ISBN	0780387015
DOI	10.1109/NSSMIC.2004.1462745
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-10-16
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cameras Robot vision systems Head Imaging phantoms Humans Animal structures Telephony Motion control Image sampling Image resolution
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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