US PATENT SUBCLASS 378 / 4
.~ Computerized tomography

Current as of: June, 1999
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378 /   HD   X-RAY OR GAMMA RAY SYSTEMS OR DEVICES

1  DF  SPECIFIC APPLICATION {14}
4.~ Computerized tomography {13}
5  DF  .~.~> Energy discriminating
6  DF  .~.~> Fluorescence or scatter mapping
7  DF  .~.~> Scatter compensating
8  DF  .~.~> Object responsive
9  DF  .~.~> Plural sources
10  DF  .~.~> Nonrotating source or detector
11  DF  .~.~> Source or detector translation within plane {3}
15  DF  .~.~> Continuous mechanical rotation
16  DF  .~.~> Beam energy or intensity control
17  DF  .~.~> Tiltable or nonvertical examination plane
18  DF  .~.~> With tissue equivalent material
19  DF  .~.~> Beam detection system
20  DF  .~.~> Object positioning or aligning

DEFINITION

Classification: 378/4

Computerized tomography:

(under subclass 1) Subject matter employing computer processing of X-ray absorption or transmission data to produce an image of a cross section of an object.

(1) Note. Specifically described computer systems or algorithms which meet the general definition of Class 364 and do not include significant tomography structure should be placed in Class 364 in accordance with section II, B of that class definition.

(2) Note. The devices found herein usually include some mechanism which allows relative movement between the source or detector of X-rays and the object being examined. The tomos:graphic movement is typically produced by holding the object stationary and moving the X-ray source and the detector simultaneously in opposite directions about a pivot point lying in a plane through the object.

SEE OR SEARCH THIS CLASS, SUBCLASS:

21+, for noncomputerized tomography.

901, for a cross-reference art collection of tomography programs or processors.

SEE OR SEARCH CLASS

364, Electrical Computers and Data Processing Systems, 413.23, for algorithms and computer systems used in

tomography.

600, Surgery,

437+, for ultrasonic computer tomography.

708, Electrical Computers: Arithmetic Processing and Calculating,

813+, for analog computations of convolution data.