Contrast formation in fluoroscopic videodensitometry. III. Relation between roentgen tube potential and exposure rate to produce constant video level.
The exposure rate required to produce a prescribed value of the video level in a vidicon television chain during fluoroscopy was measured for water layers and copper filters of varying thickness. The reduction of the patient exposure rate was found to be so large that, in spite of a reduction of the iodine extinction to 20 to 50 per cent of the value at 40 to 50 kV, examinations of the circulatory system are recommended to be performed at 100 kV with slight copper filtering.
D015502:Absorptiometry, Photon; D005471:Fluoroscopy; D006801:Humans; D011829:Radiation Dosage; D013679:Technology, Radiologic; D013690:Television; D013997:Time Factors