Question
Thermal ablation of abnormal tissue using this non-invasive, non-ionizing technique can be used to treat conditions ranging from fibroids to essential tremors. For 10 points each:
[10e] Name this technique in which acoustic energy is used to destroy tissues. This technology is also used to image fetuses.
ANSWER: ultrasound [accept US; accept high-intensity focused ultrasound or HIFU; accept magnetic resonance guided focused ultrasound or MRgFUS]
[10m] Mechanical, as opposed to thermal, destruction of tissue in ultrasound ablation primarily occurs via this process. Collapse of regions generated by this process can create enough energy to emit light in a process called sonoluminescence.
ANSWER: cavitation
[10h] Numerical models of ultrasound ablation may use the Pennes “bio” form of this equation, which modifies this equation with a blood perfusion term. This equation can be derived by combining Fourier’s law with a continuity equation for energy.
ANSWER: heat equation [accept bioheat equation]
<AY, Physics>
Summary
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