NDLI: Optimal camera placement for cardiac imaging using rotating multi-segment slant-hole single photon emission computed tomography

Content Provider	IEEE Xplore Digital Library
Author	Yuchuan Wang Tsui, B.M.W. Baird, W.H.
Copyright Year	2003
Description	Author affiliation: Dept. of Radiol., Johns Hopkins Med. Institutions, Baltimore, MD, USA (Yuchuan Wang; Tsui, B.M.W.)
Abstract	Rotating multi-segment slant-hole (RMSSH) collimators provide much higher detection efficiency and allow fully 3D cardiac SPECT using a much lower number of camera positions as compared to conventional low-energy high-resolution parallel-hole collimators. In this study, the effects of number and placement of camera positions in RMSSH SPECT for cardiac imaging were studied, to achieve the best possible reconstruction image quality with minimal image artifacts. Both simulation and phantom experiments were performed. A modified SIMIND Monte-Carlo code and the realistic 3D NURBS-based Cardiac-Torso (NCAT) phantom were used in simulation studies. A GE 400AC/T camera equipped with a 4-segment slant-hole collimator with a 32.5/spl deg/ slant-angle and a Data Spectrum anthropomorphic torso phantom with cardiac insert were used in phantom experiments. Ectomography (single camera position) and RMSSH (two to three camera positions) projection data of the heart were simulated and acquired from different camera positions, and then reconstructed using an iterative OS-EM algorithm for comparison. For incomplete angle RMSSH SPECT of the heart, Ectomography gives noticeable image artifacts and distortions at any camera position. RMSSH SPECT images obtained using two camera positions 90/spl deg/ apart show significant improvements as compared with only one camera position used in Ectomography, and those placed symmetrically with respect to the long axis of the heart give the best image quality. For complete angle RMSSH SPECT acquisition of the heart using three camera positions, all combinations of camera positions that satisfy Orlov's condition show similar images that are of higher quality and quantitative accuracy than that from incomplete angle acquisitions. We conclude that the number and placement of camera positions in cardiac RMSSH SPECT should be chosen carefully for best reconstructed image and quantitative accuracy.
Starting Page	769
Ending Page	773
File Size	1035561
Page Count	5
File Format	PDF
ISBN	0780376366
DOI	10.1109/NSSMIC.2002.1239436
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-11-10
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cameras Single photon emission computed tomography Imaging phantoms Heart Collimators Image reconstruction High-resolution imaging Image quality Anthropomorphism Torso
Content Type	Text
Resource Type	Article

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