Radiology Board Practice Questions - Saudi Board Diagnostic Radiology Final Written Exam

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Which of the following ultrasound parameters is the primary determinant of the Mechanical Index (MI), which monitors the potential for non-thermal bioeffects like cavitation?

Spatial-peak temporal-average intensity (ISPTA). Center frequency of the transducer. Peak negative (rarefactional) pressure. Pulse repetition frequency (PRF).

Correct Answer:

Peak negative (rarefactional) pressure.

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