LRA 211 RADIOLOGY IMAGE FINAL
EXAM PART 2 (GOODLUCK)
QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS 100%
CORRECT!!!
1. The protective tube housing helps to:
Answer: ✔✔
o Keep the tube cool
o Prevent electrical shocks to the radiographer
o Limit leakage radiation
Explanation:
The protective tube housing serves several important functions:
o Cooling the tube: The housing is designed to dissipate the heat
produced during x-ray production, often with oil or other cooling
mechanisms.
o Preventing electrical shocks: The housing is insulated to protect the
radiographer from electric shock hazards.
o Limiting leakage radiation: The housing helps to reduce the amount
of x-ray radiation that escapes the tube, thereby ensuring safety for
both the patient and the radiographer.
2. By regulation, x-ray tube leakage radiation can be no more than:
Answer: ✔✔ 100 mR/hour @ 1 meter
Explanation:
Leakage radiation refers to the x-rays that escape the tube housing (not
directed at the patient or image receptor). By regulation, the leakage
radiation must not exceed 100 mR/hour at a distance of 1 meter from the
, tube. This limit is set to ensure that unnecessary radiation exposure to staff
and others in the area is minimized.
3. The primary purpose of the glass or metal enclosure is to:
Answer: ✔✔ Maintain a vacuum within the tube
Explanation:
The glass or metal enclosure of the x-ray tube maintains a vacuum inside
the tube. This is crucial because it prevents the electrons from interacting
with gas molecules as they travel from the cathode to the anode, allowing for
efficient production of x-rays. Without a vacuum, the electron flow would be
hindered, and the tube's efficiency would decrease.
4. The target window is usually approximately:
Answer: ✔✔ 5 cm²
Explanation:
The target window is the area of the x-ray tube through which the x-rays
exit the tube. The size of this window is typically around 5 cm². This small
size allows for a concentrated beam of x-rays to pass through while
minimizing the amount of material the x-rays must pass through (reducing
unnecessary absorption).
The rotating anode design uses a disc whose core is made of -
ANSWER✔✔molybdenum
Tungsten is used to coat the anode disc because it has. -ANSWER✔✔a high
atomic number
The portion of the induction motor that is outside the tube enclosure is the -
ANSWER✔✔stator
EXAM PART 2 (GOODLUCK)
QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS 100%
CORRECT!!!
1. The protective tube housing helps to:
Answer: ✔✔
o Keep the tube cool
o Prevent electrical shocks to the radiographer
o Limit leakage radiation
Explanation:
The protective tube housing serves several important functions:
o Cooling the tube: The housing is designed to dissipate the heat
produced during x-ray production, often with oil or other cooling
mechanisms.
o Preventing electrical shocks: The housing is insulated to protect the
radiographer from electric shock hazards.
o Limiting leakage radiation: The housing helps to reduce the amount
of x-ray radiation that escapes the tube, thereby ensuring safety for
both the patient and the radiographer.
2. By regulation, x-ray tube leakage radiation can be no more than:
Answer: ✔✔ 100 mR/hour @ 1 meter
Explanation:
Leakage radiation refers to the x-rays that escape the tube housing (not
directed at the patient or image receptor). By regulation, the leakage
radiation must not exceed 100 mR/hour at a distance of 1 meter from the
, tube. This limit is set to ensure that unnecessary radiation exposure to staff
and others in the area is minimized.
3. The primary purpose of the glass or metal enclosure is to:
Answer: ✔✔ Maintain a vacuum within the tube
Explanation:
The glass or metal enclosure of the x-ray tube maintains a vacuum inside
the tube. This is crucial because it prevents the electrons from interacting
with gas molecules as they travel from the cathode to the anode, allowing for
efficient production of x-rays. Without a vacuum, the electron flow would be
hindered, and the tube's efficiency would decrease.
4. The target window is usually approximately:
Answer: ✔✔ 5 cm²
Explanation:
The target window is the area of the x-ray tube through which the x-rays
exit the tube. The size of this window is typically around 5 cm². This small
size allows for a concentrated beam of x-rays to pass through while
minimizing the amount of material the x-rays must pass through (reducing
unnecessary absorption).
The rotating anode design uses a disc whose core is made of -
ANSWER✔✔molybdenum
Tungsten is used to coat the anode disc because it has. -ANSWER✔✔a high
atomic number
The portion of the induction motor that is outside the tube enclosure is the -
ANSWER✔✔stator
