Method for the detection and correction of image distortions in

Details Method for the detection and correction of image distortions in Method for the detection and correction of image distortions in

1997-03-27

1999-02-16

Porta, David P.

X-ray or gamma ray systems or devices

Auxiliary data acquisition or recording

Distance or dimension marker

378 20, 378901, H05G 126

Patent

active

058728295

ABSTRACT:
In medical imaging in which a plurality of images of an object under examination are formed, image distortions are corrected using a phantom body which is present in the examination zone of the imaging device when the images of the object are acquired. It is known that image distortions in computer tomography apparatus are caused, for example, by calibration errors, by deviations from the adjusted table displacement speed, or by bending of the table under the weight of the patient. These image distortions are detected in the image of the phantom body in an acquired image and a correction rule is derived for the correction of image distortions in the entire acquired image. The phantom body is in the form of a frame of three elements of X or N shape, two of which extend parallel to one another and perpendicular to the third.

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patent: 5005578 (1991-04-01), Greer et al.
patent: 5706324 (1998-01-01), Wiesent et al.

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