NDLI: Adaptation of a Fast 3D PET Reconstruction Algorithm to an Inverse-Geometry CT System

Content Provider	IEEE Xplore Digital Library
Author	Mazin, S.R. Pelc, N.J.
Copyright Year	2006
Description	Author affiliation: NovaRay, Inc., Palo Alto, CA (Mazin, S.R.; Pelc, N.J.)
Abstract	Inverse-geometry CT (IGCT) is a new type of volumetric CT geometry. Volumetric coverage and high isotropic resolution demand a fast 3D reconstruction algorithm. The purpose of this work is to evaluate a very fast algorithm based on Defrise's Fourier Rebinning (FORE) algorithm for PET. IGCT employs a large array of focal spots opposite a detector array that shares the same axial extent as the source but is much smaller in the transverse direction. A single rotation is sufficient to acquire a 10 cm thick volume with isotropic resolution. A 3D reconstruction algorithm was developed based on FORE. For comparison, a Feldkamp-like algorithm was developed that generates an average of Feldkamp reconstructions from each source row. Projection data for a numerical torso phantom and a numerical "Defrise" phantom were simulated under the IGCT geometry. To evaluate the FORE algorithm on a real data set, a prototype IGCT system was assembled involving a 100times100 scanned-anode source array and a 48times48 photon-counting detector array mounted on a C-arm system (NovaRay, Inc., Palo Alto, CA). An anthropomorphic phantom containing a real porcine heart was scanned in a step-and-shoot mode with the C-arm in a horizontal orientation. The FORE algorithm averaged 30 sec/slice while Feldkamp averaged 30 min/slice. Like Feldkamp, FORE suffers from cone-beam blurring in z, however it does not suffer from cone-beam streaking artifacts. FORE proved to be both fast and reasonably accurate.
Starting Page	2268
Ending Page	2275
File Size	1063413
Page Count	8
File Format	PDF
ISBN	1424405602
ISSN	10957863
DOI	10.1109/NSSMIC.2006.354366
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-10-29
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Positron emission tomography Reconstruction algorithms Sensor arrays Computed tomography Imaging phantoms Geometry Detectors Torso Solid modeling Prototypes rebinning volume CT inverse-geometry CT reconstruction algorithm
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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