Evaluation of a pinhole collimator for I-131 SPECT head imaging

Journal Article · Thu Aug 01 04:00:00 EDT 1996 · IEEE Transactions on Nuclear Science

DOI:https://doi.org/10.1109/23.531887· OSTI ID:379762

Gilland, D R; Johnson, E L; Turkington, T G; Coleman, R E; Jaszczak, R J ^[1]

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1. Duke Univ. Medical Center, Durham, NC (United States). Dept. of Radiology

The performance of a pinhole collimator for I-131 SPECT of the head was evaluated. The evaluation included planar and SPECT spatial resolution, sensitivity in air and in water, septal penetration, reconstructed image quality, and activity quantitation within a simple phantom that models tumor uptake in the head. The pinhole collimator was compared to medium and high energy parallel hole collimators. The pinhole collimator demonstrated improved resolution/sensitivity trade-off compared with the parallel hole collimators over the range of distances relevant to head imaging. In planar point source images the pinhole collimator showed reduced penetration effects although in reconstructed images penetration effects were not apparent for either pinhole or high energy parallel hole collimators. Comparable activity quantitation accuracy was observed with all collimators. The accuracy was dependent on the segmentation threshold and calibration procedure. These results indicate that the pinhole collimator can provide improved performance over conventional parallel hole collimators for I-131 imaging in the head.

• DOE Contract Number: FG05-89ER60894
• OSTI ID: 379762
• Report Number(s): CONF-951073--
• Journal Information: IEEE Transactions on Nuclear Science, Journal Name: IEEE Transactions on Nuclear Science Journal Issue: 4Pt1 Vol. 43; ISSN 0018-9499; ISSN IETNAE
• Country of Publication: United States
• Language: English

Related Subjects

55 BIOLOGY AND MEDICINE
BASIC STUDIES
COLLIMATORS
HEAD
IMAGE PROCESSING
IODINE 131
PERFORMANCE
SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY