LMRT STATE EXAM 2024 ACTUAL EXAM 200

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LMRT STATE EXAM 2024 ACTUAL EXAM 200+

QUESTIONS AND CORRECT DETAILED

ANSWERS AGRADE

According to the Bergonie-Tribondeau law, which of the following types of cells are most radiosensitive?

• brain cells
• embryonic tissue cells
• cells of the gastric mucosa
• skin cells - ANSWER✅✅b. embryonic tissue cells

Which type of x-ray photon interaction with the body is primarily responsible for the radiation dose absorbed by the patient?

• compton
• photoelectric
• coherent
• characteristic - ANSWER✅✅photoelectric

What is the NCRP (report #102) recommendation for lead equivalency of aprons used for personnel protection?

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• 0.05 mm
• 0.25 mm
• 0.5 mm
• 1.0 mm - ANSWER✅✅0.5 mm

What is erythema as it relates to radiation exposure?

• loss of hair caused by high radiation dose
• loss of hair caused by a long term low radiation dose
• reddening of the skin caused by a high radiation dose
• reddening of the skin caused by a long term low radiation dose - ANSWER✅✅reddening of

the skin caused by a high radiation dose What is the guiding philosophy of radiation protection?

• ALARMA- as long as radiographs are made accesible
• ALARA- as low as reasonably achievable
• ALAIS- as long as ionization are small
• ALAP- as low as possible - ANSWER✅✅ALARA- as low as reasonably achievable

which of the following statements reflects current scientific opinion regarding the effects of diagnostic levels of ionization radiation?

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• it is carcinogenic after a certain number of examinations have been performed
• spontaneous abortion will occur if the patient is pregnant
• depression of the white blood cells count is followed by acute gastrointestinal distress
• there is an increased risk of cancer, leukemia, birth defects, and cataracts -

ANSWER✅✅there is an increased risk of cancer, leukemia, birth defects, and cataracts Which of the following changes will decrease patient dose?

• using faster speed class imaging system
• increasing kVp using the 15% rule, while decreasing the mAs to compensate

3. increasing grid ratio to 16:1 ratio - ANSWER✅✅1 and 2 only

When radiation exposure occurs during pregnancy, the greatest risk of birth defects occurs

when the exposure:

• exceeds 5 rad to the uterus
• occurs within the first trimester of pregnancy
• occurs within the third trimester of pregnancy - ANSWER✅✅1 and 2 only

At what kVp levels do compton interactions occur?

• they do not occur with x-ray exposure
• they occur below the diagnostic radiology kVp range
• they occur above diagnostic radiology kVp range
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