X-ray or gamma ray systems or devices – Specific application – Computerized tomography
Patent
1978-09-11
1982-12-21
Willis, Davis L.
X-ray or gamma ray systems or devices
Specific application
Computerized tomography
378 16, 378901, 364414, A61B 600
Patent
active
043653391
ABSTRACT:
In a tomographic apparatus and method for reconstructing two dimensional planar slices from linear projections of non-absorbed radiation useful in the fields of medical radiology, microscopy, and non-destructive testing, a beam of radiation in the shape of a fan is passed through an object lying in the same quasi plane as the object slice and non-absorption thereof is recorded on oppositely situated detectors aligned with said source of radiation. There is relative rotation between the source-detector configuration and the object within the quasi-plane. Periodic values of the detected radiation are taken, convolved with certain functions, and back-projected to produce a two-dimensional output picture on a visual display illustrating a facsimile of the object slice. A series of two-dimensional pictures obtained simultaneously or serially can be combined to produce a three-dimensional portrayal of the entire object. The invention is the first device which uses a fan beam source of radiation coupled with the application of a convolution method of data reduction with no intervening reordering of fan beam rays, thereby eliminating errors and delays in computation time which would be involved in such reordering. The invention is the first method for providing an exact reconstruction of a two-dimensional picture of an object slice from a series of one-dimensional projections of radiation not absorbed by the slice when the superior fan beam source is employed.
REFERENCES:
patent: 3866047 (1975-02-01), Hounsfield
patent: 4051378 (1977-09-01), Krippner
Nunan Craig S.
Pavkovich John M.
Bigelow Dana F.
General Electric Company
Grigsby T. N.
Stoner Douglas E.
Willis Davis L.
LandOfFree
Tomographic apparatus and method for reconstructing planar slice does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tomographic apparatus and method for reconstructing planar slice, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tomographic apparatus and method for reconstructing planar slice will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-409408