Yokogawa Medical Systems, Limited

Ge Yokogawa Medical Systems, Limited

Yasuro Takiura

Kenjiro Fujita

Keiki Yamaguchi

Toru Shimazaki

Takao Higashiizumi

Yoshihiko Watanabe

Makoto Gono

Yusuke Satta

To make it possible to decrease an X-ray exposure on an operator and to obtain an image of high quality upon fluoroscopy operation an X-ray tube is rotated to acquire data, an X-ray radiation dose is set to '0' in a predetermined angular range including an angle at which the alignment of the X-ray tube with the operator's hand is brought about, and the X-ray radiation dose is set to an ordinary one at an angle in a range other than that angular range. The predetermined angular range is established using a light beam which enables to see what part of the field has no X-ray radiation exposure, thereby increasing his safety.

Fluoroscopy method and X-ray CT apparatus

An image forming apparatus is capable of starting image reconstruction simultaneously with the start of scan. A pipe-line system image forming apparatus having an intermediate buffer between a date acquition device and an image reconstruction device, and the apparatus is characterized in that there is provided a path for supplying data from the data acquisition device directly to the image reconstruction device, whereby the first scan data is sent also to the image reconstruction device simultaneously with sending data to the intermediate buffer so as to immediately start image reconstruction according to the scan data.

Image forming apparatus

Received ultrasonic phase matching circuit

Image reconstruction data processing unit

A radiation CT system packs projection data and reads the data in a DMA mode, and separates the packed data into individual data items through format conversion when the data are to be processed. The system has a memory for storing raw projection data and processed image data for one full image. With this arrangement, a high speed processing program for image reconstruction can be executed exclusively for image reconstruction immediately after scanning operation has started. During image reconstruction processing, no data transfer to and from an external memory is performed, thereby to reduce the period of time required for image reconstruction after data have been collected.

Computer tomography system wherein preprocessing, convolution and back

Growing community of inventors

Tokyo, Japan

Yasuro Takiura