X-ray CT apparatus

Details X-ray CT apparatus X-ray CT apparatus

2007-05-24

2010-10-12

Glick, Edward J (Department: 2882)

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

Reexamination Certificate

active

07813471

ABSTRACT:
An X-ray CT apparatus is provided, having a function for deciding an X-ray imaging condition prior to scanning, the X-ray imaging condition allowing an acquisition of contrast to noise ratio appropriate for identifying a diagnostic object. Prior to the real scan, a three-dimensional model of an object is estimated from scanogram projection data of the object, a contrast to noise ratio enabling identification of the diagnostic object is calculated, based on the diagnostic object size set by an operator via an operating device when planning the scan, the three-dimensional model, and a standard imaging condition that is stored in a storage device. Then, an optimum irradiated X-ray condition (tube current and tube voltage) is calculated for achieving the contrast to noise ratio enabling identification. The X-ray condition being calculated is displayed in the form of information such as image SD value and exposure dose, under the calculated X-ray condition and under other condition.

REFERENCES:
patent: 2002/0075997 (2002-06-01), Unger et al.
patent: 2003/0016778 (2003-01-01), Tachizaki et al.
patent: 2004/0086076 (2004-05-01), Nagaoka et al.
patent: 2005/0008115 (2005-01-01), Tsukagoshi
patent: 2006/0018425 (2006-01-01), Nabatame
patent: 11-299765 (1999-11-01), None
patent: 2006-116137 (2006-05-01), None

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