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45 Cards in this Set
- Front
- Back
THE NEGATIVE TERMINAL OF THE XRAY TUBE IS THE ?
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CATHODE
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THE FILAMENT IS ACTUALLY A _ OF WIRE.
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SMALL THIN COIL
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THE MATERIAL OF CHOICE IN THE FILAMENT ?
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TUNGSTEN
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IN A CONVENTIONAL DUAL FOCUS XRAY TUBE, HOW MANY FILAMENTS ARE THERE?
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2
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0NE OF THE PRIMARY CAUSES OF PREMATURE RUBE FAILURE IS THE RADIOGRAGHER'S HABIT OF
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HOLDING DOWN THE THE ROTOR SWITCH PRIOR TO MAKING AN EXPOSURE
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WHEN AN XRAY TUBE IS OPERATING AT THE MAXIMUM TUBE CURRENT FOR A GIVEN FILAMENT CURRENT, IT IS SAID TO BE OPERATING ON ? CURRENT AT THIS PIONT AN INCREASE IN KVP WILL NOT INCREASE TO TUBE MA
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SATURATION
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THE POSITIVE SIDE OF THE XRAY TUBE IS THE ?
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ANODE
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EARLY XRAY TUBES WERE CALLED CROOKES TUBES AND HAD A COLD FILAMENT.MODERN DAY TUBES ARE TERMED ?, NAMED FOR THE DEVELOPER OF THE TUBE AND HAVE THESE TYPES OF TUBES HAVE A ? FILAMENT.
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COOLIDGE,HOT
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THE METAL SHROUD(CUP) AROUND THE FILAMENT IS CALLED THE ?
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FOCUSING CUP -CHARGE ELECTRONS
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THE FOCUSING CUP IS MADE OF NICKEL AND ITS PURPOSE IS TO ?
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FOCUS ELECTRONS, NARROW THE THERMIONIC CLOUD AS IT IS DRIVEN TOWARD THE ANODE.
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THE POSITIVE SIDE OF THE XRAY TUBE IS THE ?
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ANODE (SOURCE OF XRAY PRODUCTION)
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THE ANODE ASSEMBLY CONSISTS OF THE ?,?,?
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ANODE,STATOR,ROTOR
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THE TYPE XRAY TUBE IN WHICH THE TARGET CONTINUALLY "TURNS A NEW FACE" TO THE ELECTRON BEAM DURING EXPOSURE IS CALLED A ? TUBE
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ROTATING
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THE ATOMIC NUMBER OF TUNGSTEN IS ?
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74
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WHY IS TUNGSTEN THE METAL OF CHOICE FOR THE SOURCE OF XRAY PHOTONS FOR 3 PRIMARY REASONS?
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*HIGH ATOMIC #
*HIGH MELTING PT *DIFF TO VAPORIZE |
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AFTER LONG AND HARD USE THE TARGET OF AN XRAY TUBE DEVELOPES TINY DEPRESSIONS WHICH MAY EFFECT THE OUTPUT. THIS CONDITION IS CALLED ?
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PITTING "CRATERS"
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TO ASSIST IN THE DISSIPATION OF HEAT IN HEAVY LOAD SITUATIONS, SPECIALIZED ANODES MAY HAVE THE ANODE DISK BACKED BY A THICKER LAYER OF
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MOLYBDEUM, OR GRAHITE
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SHOULD ANODES BE WARMED UP REGULARLY? IF SO WHY?
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YES, TO MAINTAIN A STRONG VACCUM INSIDE THE ENVELOP, TO PREVENT FROM CRACKING OR PITTING
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THE PHYSICAL AREA OF THE FOCAL TRACK THAT IS IMPACTED IS TERMED THE ? WHILE THE AREA THAT IS PROJECTED OUT OF THE TUBE TOWARD THE OBJECT BEING RADIOGRAPHED IS TERMED ?
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ACTUAL FOCAL SPOT
EFFECTIVE FOCAL SPOT |
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THE PART OF THE ANODE WHERE THE HIGH-VOLTAGE ELECTRONS BOMBARD IS TERMED THE ?
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TARGET FOCUS, FOCAL SPOT, OR FOCAL PIONT
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AS THE ANODE TARGET ANGLE INCREASES, WHAT HAPPENS TO THE EFFECTIVE FOCAL-SPOT SIZE?
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IT INCREASES, THEY WORK HAND IN HAND
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THE EFFECTIVE SPOT IS ? THAN THE ACTUAL FOCAL SPOT SIZE?
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SMALLER, "LINE FOCUS PRINCIPLE"
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THE ANGLE OF THE ANODES RANGE FROM ? TO ? DEGRESS WITH ? DEGREES BEING THE MOST COMMON DIAGNOSTIC RADIOGRAPHY TARGET ANGLE.
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7,17,12
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A VERY SMALL FOCAL SPOT, USUALLY A FRACTION OF A MILLIMETER IN SIZE IS TERMED A ?
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FRACTIONAL FOCAL SPOT
.1-3 MM "SPECIAL PROCEDURE" |
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FOR THE BEST DETAIL, WHAT SIZE FOCAL SPOT MUST BE USED ?
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SMALL
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THE HEEL EFFECT RESULTS IN HIGHER INTENSITY XRAY ON THE ? SIDE OF THE CENTRAL AXIS OF THE XRAY BEAM
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CATHODE
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WHAT IS THE FUNCTION OF THE STATOR?
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TO TURN IN THE ANODE
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THE COMMON ROTATING ANODES REVOLVE AT ? REVOLUTIONS PER MIN WHICH HIGH-SPEEDING ROTATING ANODES OPERATE AT ? RPM TO ASSIST IN DISSIPATING HEAT.
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3,200-3,600
10,000-12,000 |
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THE PRIMARY FUNCTION OF THE ENVELOP IS TO ? AS THIS GREATLY INCREASES THE EFFICIENCY OF THE TUBES OPRERTATION
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CREATE AND MAINTAIN A VACCUM *ELIMINATE TUNGSTEN
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XRAYS EMITTED FROM THE ANODE ARE EMITTED IN ALL DIRECTIONS, AND IS REFERRED TO AS ?
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ISTROPICALLY
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ANY PHOTONS THAT ESCAPE THE PROTECTIVE HOUSING EXCEPT AT THE PORT ARE TERMED ?
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LEAKAGE RADIATION
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LEAKAGE RADIATION MUST NOT EXCEED ?
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100MR/HR AT 1 METER AWAY
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AN XRAY TUBE IS USUALLY IMMERSED IN OIL FOR THE PURPOSE ? AND ?
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ABSORBS HEAT, INSULATE HEAT
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THE SAFE LIMIT WITHIN WHICH A TUBE MAYBE OPERATED CAN DETERMINED BY MAKING USE OF THE ?
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TUBE RADIATING CHART
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HOW ARE HEAT UNITS CALCULATED?
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KVP*MA*TIME*1 1.35 1.41 1.45
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THE MAXIUMUM SAFE EXPOSURE FOR AN XRAY TUBE IS ? WITH A SMALL FOCUS THAN WITH A LARGE ONE?
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LESSER
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THE ACTUAL TARGET OF AN XRAY TUBE IS COMPOSED OF WHAT SUBSTANCES?
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TUNGSTEN
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THE HIGH VOLTAGE CURRENT PASSES THRU AN XRAY TUBE IN WHICH DIRECTION?
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CATHODE TO ANODE
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AN INCREASE IN KV ACROSS THE XRAY TUBE RESULTS IN ?
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RADIATION OF SHORTER WAVE LENGTHS
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THAT PORTION OF THE XRAY TUBE CONSISTING OF A METAL FILAMENT THAT EMITS ELECTRONS WHEN HEATED IS THE ?
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CATHODE
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THE QUANTITY OF XRAYS RECEIVED AT A GIVEN PIONT IS PRIMARILY DEPENDENT UPON
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THE MILLIAMPERE SECONDS OR mA
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THE SOURCE OF ELECTRONS IN A ROTATING ANODE TUBE IS TUBE ?
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FILAMENT
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IN A XRAY TUBE, IF A KV IS APPLIED, THE ELECTRONS ARE DRIVEN TO THE ?
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ANODE
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THE ABILITY OF THE ANODE TO DISSIPATE HEAT IS MEASURED IN:
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HEAT UNITS
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THE COOLING CHARACTERISTICS OF AN XRAY TUBE ARE REFERRED TO AS THE ?
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HEAT DISSIPATION RATE
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