JNM
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

The Journal of Nuclear Medicine Vol. 24 No. 9 822-828
© 1983 by Society of Nuclear Medicine
This Article
Right arrow Full Text (PDF)
Right arrow An erratum has been published
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Gottschalk, S. C.
Right arrow Articles by Wake, R. H.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Gottschalk, S. C.
Right arrow Articles by Wake, R. H.

SPECT Resolution and Uniformity Improvements by Noncircular Orbit

Stephen C. Gottschalk, David Salem, Chun Bin Lim and Robert H. Wake

Technicare Corporation, Solon, Ohio

Correspondence: For reprints contact: Stephen C. Gottschalk, MS, Technicare Corporation, Solon, Ohio 44139.

ABSTRACT

A noncircular orbit implemented by a combination of rotational and translational motions in single photon emission computed tomography improves significantly the image resolution and uniformity. The former is realized by closer access of the detector to the object at each projection angle, and the latter by suppression of ring artifacts through the shifts in the distance between the centers of detector and object. This has been demonstrated by comparing the SPECT images for an elliptical orbit of 40 cm x 30 cm with the equivalent circular orbit of 40 cm diameter, performed by SPECT system with a high resolution collimator. Resolution FWHM improvements were 1.5–2.5 mm. Lesion contrast improved by a factor of 2.8 for a nonradioactive rod of 6 mm diam. In phantom images, the elliptical orbit showed better definition of lesion shape, sharper edge response, and clearly increased detectability. Translational motion reduced ring artifacts, particularly near the image center.




This article has been cited by other articles:


Home page
 JNMHome page
G. Germano
Technical Aspects of Myocardial SPECT Imaging
J. Nucl. Med., October 1, 2001; 42(10): 1499 - 1507.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
JOURNAL OF NUCLEAR MEDICINE TECHNOLOGY THE JOURNAL OF NUCLEAR MEDICINE
Copyright © 1983 by the Society of Nuclear Medicine.