PHOTON-COUNTING TYPE X-RAY COMPUTED TOMOGRAPHY APPARATUS AND METHOD

摘要

A photon-counting type X-ray computed tomography apparatus that comprises a high-voltage generator to generate a voltage signal, an X-ray tube to emit X-rays when the X-ray tube receives the voltage signal from the high-voltage generator, an X-ray detector to detect photons derived from the X-rays emitted from the X-ray tube, and circuitry to count a number of the detected photons with respect to a plurality of energy bands, detect a number of photons in a first energy band that exceeds an energy level corresponding to a voltage value of the voltage signal, and changing a number of photons at a second energy band based on the detected number of photons in the first energy band, to correct for operational limitations of the X-ray detector.

主权项

1. A photon-counting type X-ray computed tomography apparatus, comprising:
a high-voltage generator configured to generate a voltage signal; an X-ray tube configured to emit X-rays when the X-ray tube receives the voltage signal from the high-voltage generator; an X-ray detector configured to detect photons derived from the X-rays emitted from the X-ray tube; and circuitry configured to
count a number of the detected photons with respect to a plurality of energy bands,detect a number of photons at a first energy band that exceeds an energy level corresponding to a voltage value of the voltage signal, andchanging a number of photons at a second energy band, based on the detected number of photons at the first energy band, to correct for operational limitations of the X-ray detector.