Kabushiki Kaisha Toshiba

Toshiba Medical Systems Corporation

Clay Christopher Smith

Satoru Ohishi

Akira Adachi

Thomas Charles Judd

The influences of the vibrations and the like of a rotational radiography system are corrected with respect to a projection image for each projection direction which contains an artificial artifact, and volume data containing only a ring artifact is generated by image reconstruction using the projection images. A ring center is determined by using this volume data, and polar coordinate conversion of an actual radiographed image is executed by using the ring center as an origin, thereby extracting a signal (ring artifact) parallel to an angular axis.

Rotation center identifying method and apparatus, ring artifact correction method, and X-ray diagnostic apparatus employing the same

An X-ray computed tomography apparatus including an X-ray source, a data acquisition unit, an X-ray detection unit, a reconstruction unit, a creation unit, and a display unit. An X-ray radiated toward an object by the X-ray source is detected to generate a corresponding signal by the X-ray detection unit. According to the signal, data is acquired by the data acquisition unit. A reconstruction unit reconstructs a tomographic image, while a creation unit creates a plane image based on the acquired data A display unit displays the tomographic image and the plane image.

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Buffalo Grove, IL, United States of America

Clay Christopher Smith