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RAD Review

Rising Senior Exam 2016

QuestionAnswer
The protective tube housing helps to: a. keep the tube cool b. prevent electrical shocks to the radiographer c. limit leakage radiation d. all of the above D. all of the above -Keep the tube cool -prevent electrical shocks to the radiographer -limit leakage radiation
By regulation, x-ray tube leakage radiation can be no more than: 100 mR per hour
The positive end of the x-ray tube is the: a. anode b. cathode c. filament d. envelope A. anode
The cathode includes the: a. envelope b. filaments c. focusing cup d. B and C
The primary purpose of the glass or metal enclosure is to: a. insulate against electrical shock b. maintain a vaccuum c. allow the heat to dissipate d. none of the above B. maintain a vaccuum
An issue with using glass envelopes is that they: a. lose their resistance to heat over time b. are very expensive to purchase c. break into small pieces of glass when they break d. allow vaporized tungsten to coat the inside of the glass. D. allow vaporized tungsten to coat the inside of the glass
The area of the envelope where x-rays should exit the tube is the: a. door b. window c. trap d. gate
The anode serves a(n): a. target to stop the electrons traveling from the cathode b. electrical conductor c. heat conductor d. all of the above
Tungsten is used to coast the anode disc because it: a. has a high melting point b. has a low melting point c. has a low atomic number d. does not conduct heat well
The portion of the induction motor that is outside the tube enclosure is the: a. rotor b. stator c. disc d. bearings
The motor that turns the anode operates through: a. the use of a transformer b. the physical connection between rotor and stator c. self-induction d. mutual induction
The primary advantage of a rotating anode is that it allows: a. a greater heat capacity at the anode b. less heat capacity at the anode c. greater heat capacity at the cathode d. less heat capacity at the cathode
The effective focal spot is the: a. same as the actual focal spot b. actual area where the electrons hit the target c. actual size of the origin of the x-ray beam d. size of origin of the x-ray beam as seen from below the tube
The size of the actual focal spot depends on
The best situation is to have a ________ actual focal spot and a ________ effective focal spot.
Most x-ray tube target angles range between: 7-18 degrees (with 12 being the most popular)
The relationship between the actual focal spot size, effective focal spot size, and anode target angle is called
The smaller the anode angle
Based on the anode heel effect, an image taken at 40" SID may demonstrate
An x-ray tube with two filaments is called a: dual-focus tube
The purpose of the focusing cup is to
The focusing cup is made of
Thermionic emission is
The space charge effect describes
The electrons in the tube current travel
Of all the energy involved in x-ray productions, 99% is converted to heat
X-rays are produced by
Characteristic x-ray photons result
The process of a series of outer-shell electrons filling inner-shell vacancies right after the other is called: characteristic cascade
The total number of x-ray photons in a beam is referred to as the: a. x-ray quality b. x-ray number c. x-ray quantity d. x-ray beam
Which of the following factors affect beam quantity? a. kVP b. distance c. filtration d. all of the above
Which of the following is the primary factor controlling quantity? a. kVP b. mAs c. distance d. filtration
To double the beam quantity: a. halve the mAs b. leave the mAs as is and reduce the kVp c. double the mAs d. increase the mAs by a factor of 4
If kVp is doubled, the quantity of radiation increases by a factor of
Which of the following results in the equivalent of doubling the mAs if the original kVp is 80? a. 85 kVp b. 92 kVp c. 120 kVp d. 160 kVp
It is recommended that kVp not be used to control beam quantity because: a. if affects the scatter production b. it affeects the penetrability c. it is less predictable in how changing the kVp affects the image d. all of the above
As the distance increases, the beam quantity reaching a specific area: a. increases b. decreases c. stays the same d. doubles
The inverse square law describes the relationship between __________ and beam intensity. a. kVp b. distance c. exposure time d. kVp
If the intensity of the beam is 900mR at a distance of 21 inches, what does the distance need to be for the intensity to measure 100 mR?
Filtration place in the path of the x-ray beam: a. absorbs low-energy photons b. absorbs high-energy photons c. increases patient dose d. reduces the quantity of radiation by a factor of 2
The prupose of beam filtration is to: a. control beam quantity b. reduce patient dose c. reduce the wear and tear on the tube d. all of the above
Beam quality refers to: a. the energy level of the radiation b. the amount of radiation c. how useful the radiation is d. all of the above
The primary controlling factor for beam quality is: a. mAs b. kVp c. distance d. filtration
As the kVp increases: a. beam energy decreases b. beam energy increases c. beam penetrability increases d. B and C
Half-value layer (HVL) is used to measure: a. beam intensity b. beam quantity c. beam quality d. all of the above
One HVL reduces the intensity of the x-ray beam to ______ of its original. a. one fourth b. one third c. one half d. two thirds
The beam that is found leaving the collimator is called the: a. collimator beam b. remnant beam c. primary beam d. transmitted beam
The cardinal rule for Radiation Protection revolves around which of the following? 1. Time 2. Distance 3. Shielding a. 2 only b. 1 and 3 c. 2 and 3 d. 1, 2, and 3
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