PHYSICS
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| CONTROLLING FACTOR OF CONTRAST | KVP IS MAIN CONTROLLING FACTOR (HAS IN DIRECT RELATIONSHIP TO CONTRAST)
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| FILTRATION | BEAM ATTENUATORS (DECREASE SKIN EXPOSURE TO PATIENT)
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| GRIDS TO DENSITY | INCREASE IN GRID RATIO WILL DECREASE
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| RECORDED DETAIL (CAN BE AFFECTED BY) | SID, OID, FOCAL SPOT, & MOTION
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| SID & DETAIL | DIRECTLY PROPORTIONAL (MORE DISTANCE = MORE DETAIL)
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| OID & DETAIL | INDIRECTLY PROPORTIONAL (LESS DISTANCE = MORE DETAIL) LESS MAGNIFICATION
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| DISTORTION TYPES | SHAPE (ELONGATION/FORSHORTENING)OR SIZE DISTORTION(MAGNIFICATION)
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| GREATER SID | LESS MAGNIFICATION (INDIRECT RELATIONSHIP)
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| GREATER OID | GREATER MAGNIFICATION (DIRECT RELATIONSHIP)
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| DENSITY | OVERALL BLACKNESS PRODUCED ON THE IMAGE
(A LOT OF DENSITY = DECREASE IN BRIGHTNESS)
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| FACTORS THAT AFFECT DENSITY | MAS, SID, KVP, GRIG, FILTRATION, BEAM RESTRICTION, FILM SCREEN COMBO
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| MAS | AMOUNT OF RADIATION EXPOSURE
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| MAS TO DENSITY | HAS DIRECT PROPORTIONAL (INCREASE IN MAS = INCREASE IN )
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| DOUBLE MAS = DOUBLE DENSITY | 20 MAS 80 KVP
40 MAS 80 KVP (DOUBLED MAS)
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| MAS TO CONTRAST | HAS NO AFFECT ON MAS
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| KVP | ENERGY
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| KVP TO DENSITY | HAS DIRECT RELATIONSHIP / NOT PROPORTIONAL (DOUBLE DENSITY-INCREASE KVP BY 15%)
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| DOUBLE KVP = 15% INCREASE | 20 MAS 80 KVP
20 MAS 92KVP (DOUBLED DENSITY)
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| CONTROLLING FACTOR OF CONTRAST | KVP IS MAIN CONTROLLING FACTOR (HAS IN DIRECT RELATIONSHIP TO CONTRAST)
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| KVP TO CONTRAST | INCREASE TO KVP = DECREASE TO CONTRAST
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| SID | SOURCE TO IMAGE DISTANCE
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| SID TO CONTRAST | SID HAS NO AFFECT
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| GRID | ELIMINATES SCATTER RADIATION PRIOR TO INTERACTING WITH IR
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| FILTRATION TO DENSITY | FILTRATION INCREASE WILL DECREASE
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| FILTRATION TO LOW ENERGY | ABSORBS LOW ENERGY TO PATIENT BUT NOT GO FOR IMAGE
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| BEAM RESTRICTION | COLLIMATION (LESS AREA FOR PHOTONS TO REACH)
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| INCREASE BEAM RESTRICTION (COLLIMATE SMALLER) | DECREASES FIELD SIZE, DECREASES DENSITY
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| COLLIMATION TO DENSITY | INDIRECT RELATIONSHIP TO DENSITY
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| INCREASE BEAM RESRTICTION | DECREASE SCATTER , INCREASE CONTRAST, DIRECT RELATIONSHIP
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| ANODE HEEL EFFECT | A PHENOMENON IN WHICH THE THE INTENSITY OF THE X-RAY BEAM IS GREATER TOWARDS THE CATHODE SIDE OF THE TUBE. THE VARIATION IN X-RAY INTENSITY ALONG THE LONGITUDINAL TUBE AXIS
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| CONTRAST | DEGREE OF DIFF BETWEEN ADJACENT DENSITIES
(RESULT OF TISSUE DIFFERENTIAL ABSORPTION OF THE XRAY PHOTONS)
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| HIGH CONTRAST SHORT SCALE = LOW KVP | RADIOGRAPH WITH FEW DENSITIES BUT GREAT DIFF BETWEEN THEM - HAND, TIB/FIB
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| LOW CONTRAST HIGH SCALE = HIGH KVP | RADIOGRAPH WITH LARGE NUMBER OF DENSITIES WITH LITTLE DIFF AMONG THEM - CHEST, PELVIS
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| CONTRAST IS AFFECTED BY | TISSSUE THICKNESS, DENSITY, EFECTIVE AUTOMIC NUM.
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| QUALITY OF BEAM (CONTRAST) | AFFECTS ATTENUATION WHICH IN RETURN AFFECTS SUBJECT CONTRAST
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| CHEST XRAY HAS HIGH OR LOW CONTRAST | LOW CONTRAST (DIFF TISSUE THICKNESS, AUTOMIC #)
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| ABDOMEN WOULD HAVE HIGH OR LOW CONTRAST | LOW CONTRAST (ORGANS ARE SIMILAR)
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| OID | OBJECT IMAGE DISTANCE (SPACE FROM SUBJECT TO IR)
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| OID TO CONTRAST | IF OID INCREASES, CONTRAST WILL INCREASE BECAUSE OF THE AIR GAP. ROOM FOR THE SCATTER PHOTONS TO DIVERGE
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| KVP FACTS | INCREASE KVP = INCREASE IN DENSITY
KVP IS THE SQUARE OF DENSITY
INCREASE KVP = DECREASE IN CONTRAST
NOTHING TO DETAIL
NOTHING TO DISTORTION
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| MAS FACTS | DOUBLE MAS = DOUBLE DENSITY
NO AFFECT ON ON CONTRAST
NOTHING ON DETAIL
NOTHING ON DISTORTION
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| TUBE PART ANGLE | INCREASE ANGLE = DECREASE DENSITY
INCREASE ANGLE = DECREASE DETAIL
INCREASE ANGLE = INCREASE DISTORTION
NOTHING TO CONTRAST
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| FOCAL SPOT SIZE | INCREASE FOCAL SPOT = DECREASE DETAIL
NOTHING TO DENSITY
NOTHING TO CONTRAST
NOTHING TO DISTORTION
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| OID FACTS | INCREASE TO OID = DECREASE TO DENSITY
INCREASE TO OID = INCREASE TO CONTRAST
INCREASE TO OID = INCREASE TO DISTORTION
INCREASE TO OID = DECREASE TO DETAIL
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| SID FACTS | INCREASE SID = DECREASE TO DENSITY
INCREASE SID = DECREASE TO DISTORTION
INCREASE SID = INCREASE TO DETAIL
NOTHING TO CONTRAST
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| BEAM RESTRICTION (COLLIMATION) | INCREASE BEAM RESTRICTION = DECREASE DENSITY
INCREASE BEAM RESTRICTION = INCREASE CONTRAST
NOTHING ON DETAIL
NOTHING ON DISTORTION
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| FILTRATION FCATS | NCREASE FILTRATION = DECREASE CONTRAST
INCREASE FILTRATION = DECREASE DENSITY
NOTHING ON DISTORTION
NOTHING ON DETAIL
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| GRID FACTS | INCREASE GRID = DECREASE DENSITY
INCREASE GRID = INCREASE CONTRAST
NOTHING TO DETAIL
NOHTING TO DISTORTION
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