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Fluroscopy

Image Intensification

QuestionAnswer
WHAT IS THE MAJOR PURPOSE OF FLUOROSCOPY? IMAGE OBJECTS IN MOTION (DYNAMIC IMAGING)
rt ONLY PERFORM FLUOROSCOPY FOR DIAGNOSTIC PURPOSES NOT FOR STATIC IMAGING. T/F FALSE - ONLY FOR STATIC IMAGING; NOT A POSITIONING PREVIEW
PRIOR TO THE IMAGE INTENSIFICATION (II) SCREENS WHAT DID WE USE? DARK FLUOROSCOPY - ZINC CADMIUM SULFIDE HAND HELD ATTACHED TO TABLE
WHAT TWO II SCREENS DO WE USE TODAY? INPUT - CESIUM IODIDEOUTPUT - ZINC CADMIUM SULFIDE
LIGHT SENSORS ON THE PERIPHERY OF THE RETNA THAT ARE RESPONSIBLE FOR NIGHT VISION. RODS
LIGHT SENSORS ON CENTER OF RETNA THAT ARE RESPONSIBLE FOR DAY VISION. CONES
NIGHT VISION IS ALSO KNOWN AS _____ _____. SCOPTIC VISION
pHOTOSCOPIC VISION IS ANOTHER NAME FOR ______ ______. DAY VISION
WHAT ARE SOME DISADVANTAGES OF DARK FLUOROSCOPY? LARGE DOSE TO RAD; NEED TO DARK ADAPT EYES; MIRROR OPTICS ONLY ALLOWED FOR ONE VIEWER
DOES THE II OPERATE AT HIGH OR LOW mA? low mA - .5 - 5 mA
WHAT IS INTERMITTENT FLUORO? PULSED FLUORO, SIMPLY TAKING YOUR FOOT OFF THE FLUORO PEDAL, reduce exposure without compromising a procedure
WHAT ALARA STANDARD IS PLACED SO THE RADIOLOGIST AND THE TECHNOLOGISTS ARE AWARE OF THE LENGTH OF TIME THEY HAVE BEEN FLUOROING? 5 MINUTE ALARM
wHAT IS THE MINIMUM SOD FOR THE II SCREEN? C-ARM? 15" AND 12"
WHEN RELEASE THE ____________ WILL AUTOMATICALLY SHUT OFF. HAND OR FOOT DEADMAN SWITCH
WHAT ARE SOME ADVANTAGES TO USING THE II SCREENS? USE PHOTOPIC VISION (DAY CONE VISION); INCREASE VISUAL ACUITY, DOES NOT NEED DARK ADAPTATION, AMPLIFIES BRIGHTNESS, VACUUM TUBE
ABILITY OF THE EYE TO DISCRIMINATE SMALL DETAILS. VISUAL ACUITY
WHAT COMPONENT OF OF THE II HELPS TO MAKE THE TUBE A VACUUM? GLASS ENVELOPE
wHAT MATERIAL IS THE INPUT PHOSPHOR MADE OF? CESIUM IODIDE
WHY IS THE INPUT PHOSPHOR MADE TO MATCH THE SHAPE OF THE OUTPUT PHOSPHOR? IT IS CONCAVE TO DECREASE DISTORTION
XRAYS INTERACT WITH THE INPUT PHOSOPHOR CREATING _________. LIGHT
CHARGED ELECTRODES PLATED ONTO THE INSIDE OF THE GLASS ENVELOPE TO ACCELERTE AND FOCUS ELECTRON STREAM. ELECTROSTATIC FOCUSING LENSES
CONVERT LIGHT TO ELECTRONS FROM INPUT PHOSPHOR. PHOTOCATHODE
WHAT MATERIAL IS THE PHOTOCATHODE MADE OF? PHOTOEMISSIVE CESIUM AND ANTIMONY
THE FOCUSING LENSES FOCUS OPTICALLY, WHAT HAPPENS TO THE IMAGE? THE IMAGE IS INVERTED ON THE OUTPUT PHOSPHOR
THE PHOTO CATHODE IS COATED ON THE ________ OF THE TUBE. INPUT SIDE
WHERE IS THE ANODE LOCATED? IS IT A ROTATING OR FIXED TARGET? IN FRONT OF THE OUTPUT PHOSPHOR; FIXED
WHAT IS THE CONSTANT POTENTIAL DIFFERENCE WITHIN THE II? 25 kVp
WHAT MATERIAL IS USED FOR THE OUTPUT PHOSPHOR? ZINC CADMIUM SULFIDE
WHAT IS PLACED UNDER THE OP TO ABSORB ISOTROPIC LIGHT AND DECREASE BACKFLOW TO IP? OPAQUE FILTER
BRIGHTNESS GAIN INCREASE IN IMAGE INTENSITY
UNIT OF LIGHT CANDELLA
CONVERSION EFFICIENCY FLUX GAIN
AUTOMATICALLY ADJUSTS TECHNIQUE TO MAINTAIN DENSITY AND CONTRAST. AUTOMATIC BRIGHTNESS CONTROL (ABC) OR AUTOMATIC DOSE CONTROL (ADC) OR AUTOMATIC BRIGHTNESS STABILIZATION (ABS)
A SLOW RESPONSE TIME IS TERMED ______. LAG
PINCUSION EFFECT EDGE DISTORTION DUE TO CURVE AND REPULSION OF ELECTRONS
REDUCTION OF IMAGE BRIGHTNESS AT THE PERIPHERY COMPARED TO THE IMAGE CENTER. VIGNETTING
QUANTUM MOTTLE BLOTCHY, GRAINY APPEARANCE
WHAT ARE THE TWO TYPES OF VIDEO CAMERA TUBES? VIDICON AND PLUMBICON (FASTER RESPONSE TIME)
WHAT IS THE PURPOSE OF THE VIDEO CAMERA TUBE? MOUNTED ON TOP OF II; CONVERTS LIGHT IMAGE INTO VIDEO SIGNAL
HOW DO THEY VIDEO CAMERA TUBES AVOID FLICKER? BY DIVIDING THE SCREEN IN 1/2
TO ALLOW FOR SPOT FILMS, USE _____ _____. BEAM SPLITTERS
What is the leakest link in the system that causes a loss of resolution? tv monitor
WHAT ARE THE ADVANTAGES AND DISADVANTAGES OF PHOTO SPOT FILMS AND CASSETTE SPOT FILMS? PHOTO - ADV. LESS INTERUPTION OF FLUORO TIME; NO INCREASE IN PT. DOSE; DISADV. IMAGE SIZE IS SMALLCASSETTE - ADV. BIGGER IMAGE; DISADV. INTERRUPTION OF FLUORO TIME; INCREASE IN EXPOSURE
THE HIGHEST ENERGY OF SCATTER OCCURS AT ____ DEGREES TO THE PATIENT AND LOWEST AT ____ TO THE TECH. 180-90
WITH VIGNETTING YOU GET A LOSS OF ________, WHILE WITH PINCUSHIONING YOU GET A LOSS OF ______. BRIGHTNESS, RESOLUTION
HOW DO YOU DETERMINE FLUX GAIN? NUMBER OF OUTPUT LIGHT PHOTONS OVER THE NUMBER OF INPUT XRAY PHOTONS
oUTPUT PHOSPHOR ILLUMINATION OVER INPUT EXPOSURE RATE CONVERSION FACTOR
MINIFICATION GAIN TIMES FLUX GAIN. BRIGHTNESS GAIN
WHAT CCD STAND FOR? CHARGED COUPLED DEVICE VIDEO CAMERA
sEMICONDUCTOR THAT SOTRES A CHARGE FROM LIGHT ON A PHOTOSENSITIVE SURFACE. STORES FREED ELECTRONS AS LATENT IMAGE; ELIMINATES LAG; converts analog to electronic signal CCD
Created by: sr4095 on 2009-01-08



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