Measurement arrangement for acquiring a signal corresponding to

Details Measurement arrangement for acquiring a signal corresponding to Measurement arrangement for acquiring a signal corresponding to

1990-10-17

1992-02-18

Cohen, Lee S.

Surgery

Truss

Pad

128782, A61B 508

Patent

active

050885014

ABSTRACT:
An arrangement for acquiring a signal corresponding to respiratory motion includes a pneumatic respiratory belt which generates a mechanical pressure signal and a pressure transducer which converts the incoming mechanical pressure signal into an optical signal using a flexible membrane, which is deformed by the pressure signal, and which has a reflective surface thereon so that a modulated light signal is generated corresponding to the pressure signal. The transducer can be constructed avoiding metallic materials, thereby permitting the transducer to be disposed in the radio frequency field of a magnetic resonance imaging tomography apparatus, and thus in the immediate proximity of the respiratory belt. The pressure signals from the belt, since they must travel only a relatively short distance to the transducer, do not significantly deteriorate and thus the sensitivity of the measuring arrangement is increased.

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patent: 4989612 (1991-02-01), Fore
"Optical Multimode Fiber Sensors: A Review", Spenner et al., Laser und Optoelektronik, Vol. 3 1983 pp. 226-234.
"Fiber-Optic Diaphragm-Curvature Pressure Transducer" Lawson et al., Optics Letters, Vol, 8, No, 5, May, 1983, pp. 286-288.

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