Cardiac imaging with CT scanner

Details Cardiac imaging with CT scanner Cardiac imaging with CT scanner

1979-12-26

1985-10-15

Smith, Alfred E.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

128653, 128661, 378 95, A61B 502, A61B 600, H05G 144

Patent

active

045478929

ABSTRACT:
The patient's ECG signal is employed in a traverse-and-rotate type CT scanner as a time base for triggering the beginning of a traverse such that the traveling beam reaches the heart at a desired phase of the cardiac cycle. For a purely-rotational-type CT scanner, continuously generated scan data is only stored for corresponding phases of successive cardiac cycles. Alternatively, gating of the beams themselves can be controlled by the ECG signal. The use of a pacemaker to stabilize the cardiac period is described along with a system for recognizing unacceptable variations in the cardiac period. In a traverse-and-rotate-type fan-beam CT scanner, the effective beam width is narrowed to hasten the traverse of the heart.

REFERENCES:
patent: 3924131 (1975-12-01), Hounsfield
patent: 3952201 (1976-04-01), Hounsfield
patent: 3954098 (1976-05-01), Dick et al.
patent: 3993995 (1976-11-01), Kaplan et al.
patent: 4031395 (1977-06-01), Le May
patent: 4037585 (1977-07-01), Gildenberg
patent: 4126785 (1978-11-01), Hounsfield
patent: 4143273 (1979-03-01), Richey et al.
patent: 4150293 (1979-04-01), Franke

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