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LRA 225 EXAMPREP UPDATED COMPLETE QUESTIONS AND VERIFIED SOLUTIONS

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LRA 225 EXAMPREP UPDATED COMPLETE QUESTIONS AND VERIFIED SOLUTIONS

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LRA 225 EXAMPREP UPDATED COMPLETE
QUESTIONS AND VERIFIED SOLUTIONS

●● Why is conventional skull radiography less common?
Answer: Due to CT and MRI


●● Why must technologists still learn skull radiography?
Answer: Needed in rural/remote areas and basic competency


●● What is the most common skull type?
Answer: Mesocephalic


●● What defines a mesocephalic skull?
Answer: Width is 75-80% of length


●● What is a brachycephalic skull?
Answer: Short and broad skull


●● What is a dolichocephalic skull?
Answer: Long and narrow skull


●● What is the average skull width?

, Answer: 6 inches (15 cm)


●● What is the average skull length?
Answer: 7.5 inches (19 cm)


●● What is the average skull height?
Answer: 9 inches (23 cm)


●● What is the petrous angle for a mesocephalic skull?
Answer: 47°


●● What is the petrous angle for a brachycephalic skull?
Answer: ~54°


●● What is the petrous angle for a dolichocephalic skull?
Answer: ~40°


●● What skull type is standard positioning based on?
Answer: Mesocephalic


●● What rotation is needed for TMJ (Law method) in a mesocephalic
skull?

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