X-ray or gamma ray systems or devices – Specific application – Computerized tomography
Patent
1997-02-19
1998-11-24
Porta, David P.
X-ray or gamma ray systems or devices
Specific application
Computerized tomography
378901, A61B 603
Patent
active
058418300
ABSTRACT:
A radiation source which generates a radiation cone-beam (14) and a two-dimensional radiation detector are spiralled continuously around and longitudinally relative to an imaging volume. Image data from the two-dimensional display is reconstructed (30.sub.1, 30.sub.2, . . . 30.sub.n) into a volumetric, physiological image stored in a subject memory (32). During an interventional surgical procedure with a surgical instrument (42), the x-ray source is gated to operate intermittently, e.g., at 60.degree. angular intervals, at a reduced radiation intensity by an x-ray tube control (40). The additional data is reconstructed into a three-dimensional image representation of the surgical instrument and stored in an instrument memory (34). An operator image selection processor (60) causes data retrieval circuits (62a, 62b) to retrieve like slices or other image representations from the subject and instrument memories. The retrieved data is combined (64) such that a resultant human-readable display (68) shows the instrument superimposed on the anatomical image. The surgical instrument volumetric image is continuously updated such that the display represents a real time display of the surgical instrument illustrating its advancement through the imaging region.
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Voxel Q Visualization System Advertising Brochure, Picker International, Inc. 1994.
Barni John J.
Freeman Kenneth L.
Kaufmann Gary A.
Smith Darrell M.
Bruce David Vernon
Picker International Inc.
Porta David P.
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