LOW NOISE TRANSMISSION SCAN SIMULTANEOUS WITH POSITRON EMISSION TOMOGRAPHY

摘要

A method and device is described for correcting PET images for the attenuation of effects of the tissues and periodic movements of the patient. The device provides gamma-rays for image registration along with the CT scan. The gamma-rays are detected by the same detectors that form the emission PET scan. The device for generating the gamma-rays is a rod that contains an array of detectors, and a radioactive source that emits two rays in coincidence with each other. One of these rays is a gamma ray, and the other can be a beta ray, an alpha ray, or a low energy x-ray. The position of the rod, which is moveable within the ring of the PET scanner, is monitored so that its position can be coordinated with the signals generated from the ring detectors.

主权项

1. A Positron Emission Tomography (PET) device comprising
multiple scan detectors configured to detect radiation emitted from a patient's body placed within the PET device, a first radioactive material having been previously placed into said body; and at least one emission detector structure positioned within the PET device and spaced from the first scan detectors, the at least one emission detection structure comprising a second radioactive material and at least one emission detector, said at least one emission detector configured to detect one or more short range radiation emitted from the second radioactive material and to generate a signal in response to said detected emissions from said second radioactive material, said second radioactive material emitting at least a gamma ray substantially simultaneous with at least one short range emission.