X-ray CT apparatus and X-ray diagnosis apparatus

摘要

An X-ray CT apparatus includes: an X-ray detector in which detecting elements that detect X-rays are arranged in a body-axis direction and a rotation direction; an acquiring unit that acquires signals of the X-rays detected by at least one group of detecting elements which includes a predetermined quantity of detecting elements and in which detecting elements are arranged in at least the rotation direction and that, when reading the signals detected by the detecting elements arranged in the rotation direction from the X-ray detector, sequentially reads the signals at times that vary among the detecting elements arranged in the rotation direction; a correction signal acquiring unit that, in accordance with the signal reading times, acquires correction signals used in a correcting process performed when an image is generated; and an image generating unit that generates the image by applying each correction signal to a corresponding one of the signals.

主权项

1. An X-ray CT apparatus comprising:
an X-ray tube configured to generate X-rays by rotating around a body axis of a subject; an X-ray detector in which a plurality of detecting elements each of which is configured to detect X-rays that have passed through the subject are arranged in a body-axis direction of the subject and in a rotation direction in which the X-ray tube rotates; an acquiring unit configured to acquire signals of the X-rays detected by at least one group of detecting elements which includes a predetermined quantity of detecting elements and in which a plurality of detecting elements are arranged in at least the rotation direction; an image generating unit configured to generate an image by using the signals acquired by the acquiring unit; and a correction signal acquiring unit configured to acquire correction signals used in a correcting process performed when the image is generated by the image generating unit, wherein when reading the signals detected by a plurality of detecting elements arranged in the rotation direction from the X-ray detector, the acquiring unit sequentially reads the signals at times that vary among the detecting elements arranged in the rotation direction, the correction signal acquiring unit individually acquires the correction signals corresponding to the times at which the signals are read, and the image generating unit generates the image by applying each of the correction signals to a corresponding one of the signals that were sequentially read at the reading times.