Midterm Pt. 2
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IF A FILM IMAGE APPEARS DARK, TO PRODUCE A DIAGNOSTIC IMAGE YOU MAY DECIDE TO:
DECREASE MAS
GENERALLY, IF A FILM IMAGE IS DARK THE MAS SHOULD BE
HALVED
IF 400 MA @ 0.03 S PRODUCES A FILM IMAGE OF A KNEE THAT IS JUST A BIT TOO LIGHT TO SEE THE BONY STRUCTURE, THE EXPOSURE FACTORS SHOULD BE CHANGED TO: A. 200 MA @ 0.03 S B. 200 MA @0.12 S
B.
IF A FILM IMAGE HAS TO BE REPEATED BECAUSE IT IS TOO DARK OR TOO LIGHT, THE MAS MUST BE CHANGED BY A FACTOR OF AT LEAST:
2
WITH DIGITAL IMAGING, IF THE MAS IS TOO HIGH THE IMAGE BRIGHTNESS WILL APPEAR:
APPROPRIATE
WITH DIGITAL IMAGING, IF THE KVP IS TOO HIGHTHE IMAGE BRIGHTNESS APPEARS:
APPROPRIATE
KILOVOLTAGE IS NOT USUALLY USED TO ADJUST DENSITY WITH FILM-SCREEN IMAGING BECAUSE: IT AFFECTS CONTRAST AS WELL _______.
DENSITY
THE INVERSE SQUARE LAW DESCRIBES THE RELATIONSHIP BETWEEN _________ AND __________.
DISTANCE AND BEAM INTENSITY
WHAT TYPE OF RELATIONSHIP DOES DISTANCE HAVE WITH X-RAY BEAM INTENSITY?
INVERSE PROPORTIONAL
WHICH OF THE FOLLOWING IS THE CORRECT FORMULA FOR THE INVERSE SQUARE LAW?
I1/I2 = (D2)2/(D1)2
IF THE INTENSITY OF RADIATION AT 36 INCHES IS 480 MR, WHAT IS THE INTENSITY IF THE SID IS INCREASED TO 72 INCHES?
120 MR
IF THE INTENSITY OF RADIATION AT 36 INCHES SID IS 600 MR, WHAT IS THE INTENSITY IF THE DISTANCE IS INCREASED TO 60 INCHES SID?
215.8 MR
IF THE INTENSITY OF RADIATION AT 72 INCHES IS 225 MR, WHAT IS THE INTENSITY IF THE SID IS DECREASED TO 40 INCHES?
728 MR
WHICH OF THE FOLLOWING IS THE CORRECT FORMULA FOR THE MAS/DISTANCE COMPENSATION FORMULA?
MAS1/MAS2 = (SID1)2/(SID2)2
WHAT TYPE OF RELATIONSHIP DOES MAS HAVE WITH SID WHEN THE GOAL IS TO KEEP THE EXPOSURE TO THE IR CONSTANT?
DIRECT PROPORTIONAL
THE MAS/DISTANCE COMPENSATION FORMULA DESCRIBES THE RELATIONSHIP BETWEEN ________ AND __________.
SID; MAS NEEDED TO COMPENSATE FOR CHANGES IN SID
WHEN THE SID IS INCREASED FROM 36 INCHES SID TO 72 INCHES SID, THE MAS MUST BE _____________ TO MAINTAIN EXPOSURE TO THE IR
INCREASED
IF 12 MAS PRODUCE APPROPRIATE FILM DENSITY AT 36 INCHES SID, HOW MUCH MAS IS NEEDED AT 72 INCHES SID TO MAINTAIN THAT AMOUNT OF FILM DENSITY?
48 MAS
IF 32 MAS PRODUCE APPROPRIATE FILM DENSITY AT 72 INCHES SID, HOW MUCH MAS IS NEEDED AT 36 INCHES SID TO MAINTAIN THAT AMOUNT OF FILM DENSITY?
8 MAS
IF 16 MAS PRODUCE APPROPRIATE FILM DENSITY AT 72 INCHES SID, HOW MUCH MAS IS NEEDED AT 48 INCHES SID TO MAINTAIN THAT AMOUNT OF FILM DENSITY?
7 MAS
THE DISTANCE BETWEEN THE OBJECT BEING IMAGED AND THE IMAGE RECEPTOR IS THE:
OID
THE DISTANCE BETWEEN THE X-RAY FOCAL SPOT AND THE IMAGE RECEPTOR IS THE:
SID
AS COMPARED WITH LOWER KVP EXPOSURES, WHEN USING HIGH KVP THE ENERGY OF THE SCATTERED PHOTON IS:
HIGHER
THE BEAM-RESTRICTION DEVICE THAT INCLUDES A VISIBLE LIGHT PROJECTING THE X-RAY FIELD SIZE ONTO THE PATIENT IS THE:
COLLIMATOR