Donald William Snyder

US Patent:

39768856, Aug 24, 1976

Filed:

Mar 18, 1975

Appl. No.:

5/559411

Inventors:

Carl J. Brunnett - Mayfield Heights OH
Jerome R. Cox - St. Louis MO
Donald L. Snyder - Clayton MO
Rodney A. Mattson - Mentor OH

Assignee:

Picker Corporation - Cleveland OH

International Classification:

G01N 2500

US Classification:

250445T

Abstract:

An improved method and apparatus for transaxial tomographic scanning of a patient. A scanning system is provided having a rotatably mounted X-ray radiation source/detector pair which orbits and radially scans the patient in the plane of orbit. The source provides a plurality of beams of radiation having axes in the orbital plane. The beams pass through the patient to an array of detectors each of which is aligned with one of the beams. Radiation intensity data is collected at predetermined orientations of each beam/detector pair as the assembly orbits about the patient. In a preferred embodiment the rotatably mounted source-detector pair is rotated as a unit through a preselected rotation angle. phi. about an axis effectively passing through the source. The axis and the source-detector pair connected to it are then orbited around the patient through an orbit angle. gamma.

US Patent:

40084000, Feb 15, 1977

Filed:

Nov 28, 1975

Appl. No.:

5/635952

Inventors:

Carl J. Brunnett - Mayfield Heights OH
Jerome R. Cox - St. Louis MO
Donald L. Snyder - Clayton MO
Rodney A. Mattson - Mentor OH

Assignee:

Picker Corporation - Cleveland OH

International Classification:

G01M 2300

US Classification:

250445T

Abstract:

A dual axial scanner in a transverse tomography system collects nonredundant data throughout one or more substantially 360. degree. orbital scan paths with uniform motion about a patient. A set of N X-ray beams scans the patient in a manner to allow collection of two sets of non-redundant data corresponding to a pair of 180. degree. scans in each 360. degree. scan. Overall time to conduct the study is decreased, and the number of required accelerations and decelerations of the assemblies is minimized. Adjacent beams of radiation are separated by an angle. alpha. , which is one degree in the preferred embodiment to provide a radiation field of ##EQU1## degrees on either side of a center of the radiation field. The source and detector assemblies are positioned prior to the first orbit such that the field center is offset a distance D from a center of orbit lying in the orbital plane. The source and detector assemblies are mounted for rotation through a rotation angle. phi. sub.

Author:

Donald L. Snyder

ISBN #:

0471810215

Author:

Donald L. Snyder

ISBN #:

0819416266

Author:

Donald L. Snyder

ISBN #:

3540975772

Author:

Donald Rowe Snyder

ISBN #:

0070595186

Author:

Donald C. Snyder

ISBN #:

0788171674

Author:

Donald R. Snyder

ISBN #:

0819409308

Author:

Donald R. Snyder

ISBN #:

0819419087

Author:

Donald R. Snyder

ISBN #:

0819425958