Kabushiki Kaisha Toshiba

Tatsuya Ban

Masahiro Ozaki

Manabu Hiraoka

Yusuke Toki

Takeo Nabatame

Masao Yamahana

Hiroyuki Onuki

Ichiro Yamagishi

Masakuni Fujise

Makoto Hayashibara

Yoshihiko Aochi

Tetsuro Hada

Kyojiro Nambu

A computer tomography apparatus of the present invention can select one of an ON state in which X-ray radiation is performed to continuously acquire projection data and an OFF state in which acquisition of projection data is stopped, and even in the OFF state, rotation of an X-ray tube is continued, thus allowing quick switching from the OFF state to the ON state.

Computer tomography apparatus

In a helical dyamic scanning X-ray CT imaging system, an X-ray source is continuously moved on the same orbit during plural helical scanning operations by controlling a projection direction and a translation of a biological body that is to be examined medically. The helical dynamic scanning X-ray CT imaging system includes a system for helically scanning the biological body as the body is translated along a Z-axis to obtain projection image data of the body along the helically scanned path. Radiation is projected from a radiation source to the biological body being translated along the Z-direction as the radiation source simultaneously moves around the translated biological body. The helical scanning process is carried out during at least first and second helical scanning operations while detecting a radiation angle of the radiation source being detected. The helical scanning process is controlled in such a manner that a first projection angle of the radiation source at a first starting position of the first helical scanning operation is coincident with a second projection angle of the radiation source at a second starting position of the second helical scanning operation.

Computerized tomographic imaging method and system for acquiring CT

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Utsunomiya, Japan

Tatsuya Ban