Low dose CT denoising

摘要

A system includes a source that rotates about an examination region and emits radiation that traverses the examination region, a radiation sensitive detector array that detects radiation traversing the examination region and generates projection data indicative of the detected radiation, and a projection data de-noiser that de-noises the projection data, wherein the de-noiser de-noises a projection based on a number of detected photons for the projection.

主权项

1. A system, comprising:
a source that rotates about an examination region and emits radiation that traverses the examination region; a radiation sensitive detector array that detects radiation traversing the examination region and generates projection data indicative of the detected radiation; evaluator that determines whether a projection is de-noised based on the number of detected photons for the projection; and a projection data de-noiser that de-noises the projection data based on the number of detected photons for the projection, wherein at least one projection includes a number of detected photons that satisfies a predetermined number of photons threshold and is not de-noised, and at least one projection includes a number of detected photons that does not satisfy the predetermined number of photons threshold and is de-noised.