X-ray CT apparatus and image processing apparatus

摘要

According to one embodiment, an X-ray CT apparatus includes an generation unit, detection unit, processing unit, and reconstruction unit. The generation unit irradiates an object with X-rays. The detection unit includes detection elements corresponding to a plurality of channels, which output detection signals upon detecting X-rays. The processing unit smoothes projection data constituted by numerical values corresponding to signals output from the elements so as to more strongly smooth a portion exhibiting a larger amount of change in the numerical value. The reconstruction unit reconstructs an image by using a plurality of projection data smoothed by the image processing unit.

主权项

1. An X-ray CT apparatus comprising:
an X-ray generation unit configured to irradiate an object with X-rays; an X-ray detection unit including X-ray detection elements corresponding to a plurality of channels, which are arrayed in a predetermined direction to output detection signals upon detecting X-rays transmitted through the object; an image processing unit configured to smooth projection data constituted by numerical values corresponding to detection signals output from the X-ray detection elements corresponding to the plurality of channels so that for all values of a change in the numerical value in a channel direction, the greater the change in the numerical values in the channel direction, the greater a smoothing strength to the projection data; and a reconstruction unit configured to reconstruct an image by using a plurality of projection data smoothed by the image processing unit.