Variance propagation for SPECT with energy-weighted acquisition

Author

Jaszczak, Ronald J. ; Hoffman, David C. ; DeVito, Raymond P.

Author_Institution

Dept. of Radiol., Duke Univ. Med. Center, Durham, NC, USA

Volume

38

Issue

2

fYear

1991

fDate

4/1/1991 12:00:00 AM

Firstpage

739

Lastpage

747

Abstract

The authors compare the noise characteristic of SPECT (single-photon-emission computed tomography) images which are reconstructed from data acquired by both EWA energy-weighted acquisition and normal windowed acquisition (NWA). The comparisons used are propagation of variance and measurement of the noise power spectrum (NPS). For a selected Tl-201 weighing function, the analytically predicted variance (neglecting covariance terms) was compared with the variance from experimental SPECT scans of a phantom. Reasonable agreement was observed between predicted and measured percent rms noise. The NPS for EWA was skewed slightly with respect to the NWA spectrum

Keywords

computerised tomography; radioisotope scanning and imaging; SPECT; energy-weighted acquisition; medical diagnostic imaging; noise characteristic; noise power spectrum; normal windowed acquisition; nuclear medicine; phantom; reconstructed images; rms noise; single-photon-emission computed tomography; variance propagation; Algorithm design and analysis; Buffer storage; Electromagnetic scattering; Event detection; Image reconstruction; Noise measurement; Noise reduction; Optical imaging; Particle scattering; Power measurement;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.289383

Filename

289383