摘要
Single-photon emission computed tomography (SPECT) is based on the measurement of radiation emitted by a radiotracer injected into the patient Because of photoelectric absorption and Compton scatter, the γ photons are attenuated inside the body before arriving at the detector. A quantitative reconstruction must consider the attenuation, which is usually non-uniform. Novikov had derived an explicit formula for non-uniformly attenuated SPECT reconstruction of parallel-beam collimators. In this paper, we extend their researches to variable focal-length fan-beam collimators, and derived a ray-driven analytical variable fan-beam reconstruction formula with non-uniform attenuation. Its accuracy is demonstrated by computer simulation experiments*.
| 源语言 | 英语 |
|---|---|
| 页 | 731-735 |
| 页数 | 5 |
| 出版状态 | 已出版 - 2002 |
| 已对外发布 | 是 |
| 活动 | 2002 IEEE Nuclear Science Symposium Conference Record - Norfolk, VA, 美国 期限: 10 11月 2002 → 16 11月 2002 |
会议
| 会议 | 2002 IEEE Nuclear Science Symposium Conference Record |
|---|---|
| 国家/地区 | 美国 |
| 市 | Norfolk, VA |
| 时期 | 10/11/02 → 16/11/02 |