| 摘要 |
In positron emission tomography, a nuclear medicine scanner is utilized to detect gamma-ray events resulting from positron annihilation events. Molecules with known behaviors are tagged with radioactive isotopes which decay into gamma-ray pairs which are detected coincidentally, i.e. in a near-simultaneous fashion, by radiation detectors. A temporal recorder and a subject support monitor indicate the time and position of the subject when the coincident gamma-rays were detected. A storage buffer collects gamma-ray detection times and locations along with support positions. Every 1/100<SUP>th</SUP>- 1/10<SUP>th </SUP>second, a batch of data collected in the buffer is reconstructed into overlapping portions of an image memory as the support moves continuously through the scanner. |
