An investigation of filter choice for filtered back-projection reconstruction in PET

被引：12

作者：

Farquhar, TH ^{[1
]}

Chatziioannou, A ^{[1
]}

Chinn, G ^{[1
]}

Dahlbom, M ^{[1
]}

Hoffman, EJ ^{[1
]}

机构：

[1] Univ Calif Los Angeles, Sch Med, Dept Med & Mol Pharmacol, Div Nucl Med & Biophys, Los Angeles, CA 90095 USA

来源：

IEEE TRANSACTIONS ON NUCLEAR SCIENCE | 1998年 / 45卷 / 03期

关键词：

D O I：

10.1109/23.681991

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A key parameter in the practical application of filtered back-projection (FBP), the standard clinical image reconstruction algorithm for positron emission tomography (PET), is the choice of a low-pass filter window function and its cut-off frequency. However, the filter windows and cut-off frequencies for clinical reconstruction are usually chosen empirically, based on a small sample of images and filters. By considering the features of the signal and noise spectra in a sinogram, the desired image resolution, and the signal-to-noise ratio (SNR) of the filtered sinogram, a methodology for informed selection of a filter function and cut-off frequency for FBP was investigated. Simulations of sinogram data similar to whole body or cardiac studies provided information on the signal and noise frequency-domain spectra of noisy projection data. The improvements in SNR with different filter windows and cut-off frequencies were evaluated and compared. The projection spectrum SNR measure did not prove to be an accurate indicator of subjective image quality or lesion detectability with variations in Poisson noise and image resolution.

引用

页码：1133 / 1137

页数：5

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