Image display apparatus for radiation diagnosis

Details Image display apparatus for radiation diagnosis Image display apparatus for radiation diagnosis

1990-10-26

1992-11-03

Porta, David P.

X-ray or gamma ray systems or devices

Electronic circuit

Exposure timer

378 62, 358111, H05G 164

Patent

active

051611783

ABSTRACT:
Image data of a plurality of frames obtained upon irradiating a radiation onto an object to be examined, the object being injected with a catheter in a blood vessel thereof, are converted into digital image of a plurality of frames by an A/D. Digital image data of a first predetermined frame and digital image data of a second predetermined frame prior to the first predetermined frame, which are converted by the A/D, are alternately stored in first and second memories. A difference between the digital image data of the first predetermined frame output from the A/D and the digital image data of the second predetermined frame output from the one of first and second memories is calculated by a subtractor to obtain subtraction image data denoting a motion of the catheter. This subtraction image data is multiplied by a multiplier with a predetermined weighting factor input by a console to emphasize the subtraction image data, thereby displaying subtraction image data emphasized in correspondence with the catheter motion on a TV monitor.

REFERENCES:
patent: 4398213 (1983-08-01), Haendle et al.
patent: 4459990 (1984-07-01), Barnea
patent: 4581635 (1986-04-01), Franke
patent: 4618976 (1986-10-01), Haendle et al.
patent: 4636850 (1987-01-01), Stewart
patent: 4663773 (1987-05-01), Haendle et al.
patent: 4868857 (1989-09-01), Dobbins, III

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