Optimization of signal detection in SPECT

Author

Vaslow, Dale F. ; Wilson, Douglas G. ; Rowe, Bruce ; Wilson, Michael A. ; Bianco, Jesus A.

Author_Institution

Dept. of Radiol., Wisconsin Univ., Madison, WI, USA

Volume

8

Issue

4

fYear

1989

fDate

12/1/1989 12:00:00 AM

Firstpage

313

Lastpage

321

Abstract

Parallel-hole collimators of varying design are discussed, using the display signal-to-noise ratio of R.F. Wagner et al. (Med. Phys., vol.6, p.83-94, 1979) to obtain contrast-detail diagrams and analytical expressions for the signal-to-noise ratio in SPECT (single-photon-emission computed tomography). It is concluded: (1) that the detectability of deeply embedded small objects (more than ~10 cm deep) may be improved only slightly by improvements in the resolution and geometric efficiency of parallel-hole collimators; (2) that a long-bore collimator outperforms a low-energy general-purpose collimator for objects smaller than ~2 cm, but only to a minor degree; and (3) that for improvement of small object detectability by SPECT, the most fruitful technological pursuit would probably involve development of focused collimators

Keywords

computerised tomography; optimisation; radioisotope scanning and imaging; SPECT; analytical expressions; contrast-detail diagrams; display signal-to-noise ratio; focused collimators; geometric efficiency; medical diagnostic imaging; nuclear medicine; parallel-hole collimators; resolution; signal detection optimisation; single-photon-emission computed tomography; Cameras; Displays; Frequency; Low-frequency noise; Object detection; Optical collimators; Signal detection; Signal resolution; Signal to noise ratio; Spatial resolution;

fLanguage

English

Journal_Title

Medical Imaging, IEEE Transactions on

Publisher

ieee

ISSN

0278-0062

Type

jour

DOI

10.1109/42.41484

Filename

41484