IMAGE ACQUSITION TIME IMAGE ACQUSITION TIME ( CAPTURE) IN FLUORO( CAPTURE) IN FLUORO
1/SEC TO 10/SEC
TUBE INTERROGATION TUBE INTERROGATION TIMETIME
THE TIME REQUIRED FOR THE X-RAY TUBE TO BE SWITCHED ON
EXTINCTION TIMEEXTINCTION TIME
THE TIME REQUIRED FOR THE X-RAY TUBE TO BE SWITCHED OFF
GENERATORS IN DIGITAL GENERATORS IN DIGITAL FLUOROSCOPYFLUOROSCOPY
THREE PHASE
HIGH FREQUENCY
EXTINCTION TIME < 1 ms
IN 1980 CCD REPLACED IN 1980 CCD REPLACED THE CAMERA IN VIDEO THE CAMERA IN VIDEO
SYSTEMSYSTEM
I.I. AND CCDI.I. AND CCD
LIGHT
SIGNAL
CCD SYSTEM ADVANTAGE CCD SYSTEM ADVANTAGE OVER CAMERA SYSTEMOVER CAMERA SYSTEM
HIGH DQE LOW LEVEL OF ELECTRONIC NOISE HIGH SPATIAL RESOLUTION NO LAG OR BLOOMING NO MAINTENANCE UNLIMITED LIFE UNAFFECTED BY MAGNETIC FIELD LINEAR RESPONSE LOWER DOSE
RESPONSE OF CCD- RESPONSE OF CCD- LINEARLINEAR
FUTURE – CCD REPLACED FUTURE – CCD REPLACED BY SILICON PIXEL BY SILICON PIXEL
DETECTORSDETECTORS
VIDEO SYSTEM IN DFVIDEO SYSTEM IN DF
525 LINE SYSTEM
IMAGE FORMATIONIMAGE FORMATION
TEMPORAL SUBTRACTION
ENERGY SUBTRACTION
TEMPORAL SUBTRACTIONTEMPORAL SUBTRACTION
IMAGE OBTAINED AT ONE TIME IS SUBTRACTED FROM THE IMAGE OBTAINED AT THE LATER TIME
ENERGY SUBTRACTIONENERGY SUBTRACTION
USES TWO DIFFERENT X-RAY BEAMS ALTERNATELY TO PROVIDE A SUBTRACTION IMAGE RESULTING FROM DIFFERENCES IN PHOTOELECTRIC INTERACTION