Boots – shoes – and leggings
Patent
1990-08-14
1993-11-16
Envall, Jr., Roy N.
Boots, shoes, and leggings
36441317, 36441319, G06F 1500
Patent
active
052629465
ABSTRACT:
The radiation source (22) rotates around a patient on a patient couch (30) as the couch is advanced through an examination region (14). Radiation detectors (24) detect radiation that has passed through the patient along rays of a plurality of fan shaped views. Each view is identifiable by its angular position around the examination region and its longitudinal position in the spiral and each ray is identifiable by its angular position in the fan. An interpolator (46) interpolates views collected over more than two revolutions of spiral path using an interpolation function (FIGS. 1A-1D). A set of interpolated views is reconstructed (54) into a series of image representations representing parallel planar slices through the imaged volume. In some reconstructions, particularly reconstructions in which a 180.degree. based reconstruction algorithm is used or the energy of the x-ray beam is varied, the filter function is varied from ray to ray within each view. A projection filter can also be varied from view to view in order to emphasize structures along various axes of a subject. A cardiac or other physiological condition monitor (90) monitors for movement of the subject so that one or more of the rotational speed of the x-ray source, movement of the patient table, energy of the x-ray beam, or filter function can be varied accordingly.
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"World's Fastest CT" advertising brochure of Picker International, Inc.
Bai Ari M.
Envall Jr. Roy N.
Picker International Inc.
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