Title:
X-RAY CT DEVICE
Document Type and Number:
Japanese Patent JP3168824
Kind Code:
B2
Abstract:
PURPOSE: To provide an image having no artifact even when helical scanning pitch is enlarged by moving a testee in Z-direction, during the rotation of an X-ray tube and an X-ray detector, by the distance for one rotation to perform a helical scanning, and moving the X-ray focus at high speed during the rotation.
CONSTITUTION: This X-ray CT device has an X-ray tube 11 rotated to draw a circular track on one plane and having an X-ray focus reciprocated at high speed in the direction right-angled to the rotating plane, and an X-ray detector 12 having a number of detecting elements two-dimensionally arranged in two directions of the rotating plane inward direction and the direction rightangled to the plane. A testee 14 laid in the space between the X-ray tube 11 and the X-ray detector 12 is relatively moved to the both 11, 12 in the direction right- angled to the rotating plane, during the rotation of the X-ray tube 11, by at least the width for one piece or more of the direction right-angled to the rotating plane of each detecting element per rotation, and the X-ray detection data is spirally reverse-projected to reconfigure a three-dimensional image related to the testee.
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Inventors:
Shiro Oikawa
Application Number:
JP11476594A
Publication Date:
May 21, 2001
Filing Date:
April 30, 1994
Export Citation:
Assignee:
SHIMADZU CORPORATION
International Classes:
A61B6/02; A61B6/03; G01N23/04; H05G1/26; H05G1/52; (IPC1-7): A61B6/03
Domestic Patent References:
| JP678914A | ||||
| JP5184563A |
Attorney, Agent or Firm:
Yusuke Sato