X-ray computerized tomography apparatus and method for controlling the same
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United States of America Patent
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May 12, 1998
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N/A
app pub date -
Apr 22, 1996
filing date -
Jul 10, 1995
priority date (Note) -
Expired
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Abstract
An X-ray computerized tomography apparatus having an X-ray tube or detector constantly rotated an around an object for acquiring data during specific phase segments of the motion of the object. A period h and a phase are detected from R waves of an electrocardiogram. Searching is then done through a table to provide delay time d, measuring time e, rotating time k (being an integer not a multiple of period h), and counts n corresponding to the period h to the expression below: k=(h-e)/(1-M); wherein M is (0.ltoreq.M<1). n is obtained as an integer greater than k/(h-k). In operation, while the tube or detector is continuously rotated over k, X-rays are emitted at d. Data is measured during e, at the end of which the emission of X-rays is stopped. This is repeated as often as n until image reconstruction is acquired.
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