X-ray or gamma ray systems or devices – Electronic circuit – With display or signaling
Patent
1996-08-09
1997-07-01
Wong, Don
X-ray or gamma ray systems or devices
Electronic circuit
With display or signaling
378 9811, H05G 164
Patent
active
056446136
ABSTRACT:
A method of producing a road-mapped image of a body portion for monitored guidance of a catheter therethrough, the method including providing a first X-ray transmission frame of the body portion, injecting contrast-enhancing material into a blood vessel in the body portion, irradiating the body portion with X-ray radiation for a first irradiation session, producing a series of second X-ray transmission frames of the body portion during the first irradiation session, forming a series of third, subtracted, frames each third frame corresponding to the difference between a respective second frame and the first frame, selecting one of the third frames, irradiating the body portion with X-ray radiation for a second irradiation session, guiding the catheter through a blood vessel in the body portion during the irradiation session, producing a first, dynamic, X-ray transmission image including a plurality of fourth frames of the body portion during the second irradiation session and forming a second, dynamic, image of the body portion including a series of fifth, subtracted, frames each fifth frame corresponding to the difference between a respective fourth frame and the second frame corresponding to the selected one of the third frames.
REFERENCES:
patent: 4555728 (1985-11-01), Fenster et al.
patent: 5161178 (1992-11-01), Honda et al.
CMT-Medical Technologies Ltd.
Wong Don
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