Image Intensification
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| WHAT IS THE MAJOR PURPOSE OF FLUOROSCOPY? | IMAGE OBJECTS IN MOTION (DYNAMIC IMAGING)
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| rt ONLY PERFORM FLUOROSCOPY FOR DIAGNOSTIC PURPOSES NOT FOR STATIC IMAGING. T/F | FALSE - ONLY FOR STATIC IMAGING; NOT A POSITIONING PREVIEW
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| PRIOR TO THE IMAGE INTENSIFICATION (II) SCREENS WHAT DID WE USE? | DARK FLUOROSCOPY - ZINC CADMIUM SULFIDE HAND HELD ATTACHED TO TABLE
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| WHAT TWO II SCREENS DO WE USE TODAY? | INPUT - CESIUM IODIDEOUTPUT - ZINC CADMIUM SULFIDE
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| LIGHT SENSORS ON THE PERIPHERY OF THE RETNA THAT ARE RESPONSIBLE FOR NIGHT VISION. | RODS
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| LIGHT SENSORS ON CENTER OF RETNA THAT ARE RESPONSIBLE FOR DAY VISION. | CONES
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| NIGHT VISION IS ALSO KNOWN AS _____ _____. | SCOPTIC VISION
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| pHOTOSCOPIC VISION IS ANOTHER NAME FOR ______ ______. | DAY VISION
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| WHAT ARE SOME DISADVANTAGES OF DARK FLUOROSCOPY? | LARGE DOSE TO RAD; NEED TO DARK ADAPT EYES; MIRROR OPTICS ONLY ALLOWED FOR ONE VIEWER
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| DOES THE II OPERATE AT HIGH OR LOW mA? | low mA - .5 - 5 mA
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| WHAT IS INTERMITTENT FLUORO? | PULSED FLUORO, SIMPLY TAKING YOUR FOOT OFF THE FLUORO PEDAL, reduce exposure without compromising a procedure
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| 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
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| wHAT IS THE MINIMUM SOD FOR THE II SCREEN? C-ARM? | 15" AND 12"
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| WHEN RELEASE THE ____________ WILL AUTOMATICALLY SHUT OFF. | HAND OR FOOT DEADMAN SWITCH
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| 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
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| ABILITY OF THE EYE TO DISCRIMINATE SMALL DETAILS. | VISUAL ACUITY
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| WHAT COMPONENT OF OF THE II HELPS TO MAKE THE TUBE A VACUUM? | GLASS ENVELOPE
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| wHAT MATERIAL IS THE INPUT PHOSPHOR MADE OF? | CESIUM IODIDE
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| WHY IS THE INPUT PHOSPHOR MADE TO MATCH THE SHAPE OF THE OUTPUT PHOSPHOR? | IT IS CONCAVE TO DECREASE DISTORTION
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| XRAYS INTERACT WITH THE INPUT PHOSOPHOR CREATING _________. | LIGHT
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| CHARGED ELECTRODES PLATED ONTO THE INSIDE OF THE GLASS ENVELOPE TO ACCELERTE AND FOCUS ELECTRON STREAM. | ELECTROSTATIC FOCUSING LENSES
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| CONVERT LIGHT TO ELECTRONS FROM INPUT PHOSPHOR. | PHOTOCATHODE
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| WHAT MATERIAL IS THE PHOTOCATHODE MADE OF? | PHOTOEMISSIVE CESIUM AND ANTIMONY
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| THE FOCUSING LENSES FOCUS OPTICALLY, WHAT HAPPENS TO THE IMAGE? | THE IMAGE IS INVERTED ON THE OUTPUT PHOSPHOR
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| THE PHOTO CATHODE IS COATED ON THE ________ OF THE TUBE. | INPUT SIDE
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| WHERE IS THE ANODE LOCATED? IS IT A ROTATING OR FIXED TARGET? | IN FRONT OF THE OUTPUT PHOSPHOR; FIXED
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| WHAT IS THE CONSTANT POTENTIAL DIFFERENCE WITHIN THE II? | 25 kVp
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| WHAT MATERIAL IS USED FOR THE OUTPUT PHOSPHOR? | ZINC CADMIUM SULFIDE
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| WHAT IS PLACED UNDER THE OP TO ABSORB ISOTROPIC LIGHT AND DECREASE BACKFLOW TO IP? | OPAQUE FILTER
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| BRIGHTNESS GAIN | INCREASE IN IMAGE INTENSITY
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| UNIT OF LIGHT | CANDELLA
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| CONVERSION EFFICIENCY | FLUX GAIN
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| AUTOMATICALLY ADJUSTS TECHNIQUE TO MAINTAIN DENSITY AND CONTRAST. | AUTOMATIC BRIGHTNESS CONTROL (ABC) OR AUTOMATIC DOSE CONTROL (ADC) OR AUTOMATIC BRIGHTNESS STABILIZATION (ABS)
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| A SLOW RESPONSE TIME IS TERMED ______. | LAG
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| PINCUSION EFFECT | EDGE DISTORTION DUE TO CURVE AND REPULSION OF ELECTRONS
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| REDUCTION OF IMAGE BRIGHTNESS AT THE PERIPHERY COMPARED TO THE IMAGE CENTER. | VIGNETTING
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| QUANTUM MOTTLE | BLOTCHY, GRAINY APPEARANCE
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| WHAT ARE THE TWO TYPES OF VIDEO CAMERA TUBES? | VIDICON AND PLUMBICON (FASTER RESPONSE TIME)
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| WHAT IS THE PURPOSE OF THE VIDEO CAMERA TUBE? | MOUNTED ON TOP OF II; CONVERTS LIGHT IMAGE INTO VIDEO SIGNAL
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| HOW DO THEY VIDEO CAMERA TUBES AVOID FLICKER? | BY DIVIDING THE SCREEN IN 1/2
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| TO ALLOW FOR SPOT FILMS, USE _____ _____. | BEAM SPLITTERS
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| What is the leakest link in the system that causes a loss of resolution? | tv monitor
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| 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
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| THE HIGHEST ENERGY OF SCATTER OCCURS AT ____ DEGREES TO THE PATIENT AND LOWEST AT ____ TO THE TECH. | 180-90
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| WITH VIGNETTING YOU GET A LOSS OF ________, WHILE WITH PINCUSHIONING YOU GET A LOSS OF ______. | BRIGHTNESS, RESOLUTION
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| HOW DO YOU DETERMINE FLUX GAIN? | NUMBER OF OUTPUT LIGHT PHOTONS OVER THE NUMBER OF INPUT XRAY PHOTONS
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| oUTPUT PHOSPHOR ILLUMINATION OVER INPUT EXPOSURE RATE | CONVERSION FACTOR
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| MINIFICATION GAIN TIMES FLUX GAIN. | BRIGHTNESS GAIN
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| WHAT CCD STAND FOR? | CHARGED COUPLED DEVICE VIDEO CAMERA
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| 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
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