2031142-A is referenced by 42 patents.

Particulate sources of signals which can be detected outside the body of a patient are introduced into the circulating blood and are tracked in three dimensions in the region of the heart using suitable detectors (7, 7', 8, 8') disposed about the patient's chest. This permits the sequence of positions of each particle to be recorded as a function of time as each particle flows through a coronary vessel. Data analyses of these recordings of particle positions provide information about the velocity of blood flow through, and the course of each coronary artery. This velocity information is used to determine the extent, severity and location of stenotic lesions of the coronary arteries. The sources preferably contain a positron emitter and their position is determined from produced pairs of gamma rays.

Apparatus and method for examining a blood vessel of interest using radiation detected outside the body
Application Number
GB19780037906 19780923
Publication Number
2031142 (A)
Application Date
September 23, 1978
Publication Date
April 16, 1980
Shaw R
G01B 13/00
G01F 01/70
G06F 19/00
G01T 01/00
G01F 01/704
A61B 06/00
A61B 05/026
G06F 19/00
G01T 01/29
G01F 01/704
A61B 06/00
A61B 05/0275
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