Three-dimensional restoration of single photon emission computed tomography images

Journal Article · Sat Oct 01 04:00:00 EDT 1994 · IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/23.317385· OSTI ID:6861795

Boulfelfel, D; Rangayyan, R M ^[1]; Hahn, L J; Kloiber, R ^[2]

---

1. Univ. of Calgary, Alberta (Canada). Dept. of Electrical and Computer Engineering
2. Foothills Hospital, Calgary, Alberta (Canada). Division of Nuclear Medicine

Restoration of single photon emission computed tomography (SPECT) images is usually performed either on two-dimensional (2-D) projection images (pre-reconstruction restoration) or on SPECT slices (post-reconstruction restoration). This study presents the application of a three-dimensional (3-D) filter in restoring SPECT images. The 3-D filter is shown to perform better than the 2-D methods because it takes into consideration the interslice information in the filtering process and has a relatively space-invariant blur function. To reduce the space-variance of the 3-D point spread function (PSF), conjugate projections were combined by geometric averaging before reconstruction. The authors investigated the potential of 3-D Wiener and power spectrum equalization (PSE) filters. These filters were applied to SPECT images of a resolution phantom and a large, truncated cone phantom containing two types of cold spots: a sphere, and a triangular prism. The filters were also applied to clinical images of the liver and spleen. The images were acquired on an ADAC GENESYS camera. A comparison was performed between results obtained in this study and those obtained by 2-D pre-reconstruction restoration and 2-D post-reconstruction restoration filters. Quantitative analysis of the 3-D restored images performed through measurement of root mean squared (RMS) errors and contrast ratios showed a considerable reduction in error and increase in contrast over images restored using the two other methods.

• OSTI ID: 6861795
• Journal Information: IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States) Vol. 41:5; ISSN 0018-9499; ISSN IETNAE
• Country of Publication: United States
• Language: English

Related Subjects

550601* -- Medicine-- Unsealed Radionuclides in Diagnostics
62 RADIOLOGY AND NUCLEAR MEDICINE
BODY
COMPUTERIZED TOMOGRAPHY
DIAGNOSTIC TECHNIQUES
DIGESTIVE SYSTEM
EMISSION COMPUTED TOMOGRAPHY
FILTERS
GLANDS
IMAGE PROCESSING
LIVER
OPTIMIZATION
ORGANS
PERFORMANCE TESTING
PROCESSING
SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY
SPLEEN
TESTING
TOMOGRAPHY