Frequency, pulse length, and the mechanical index
Frequency, pulse length, and the mechanical index
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DOI：
10.1121/1.1901757
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发表时间：
2005-07-01
期刊：
影响因子：
--
通讯作者：
Church, CC
中科院分区：
文献类型：
--
作者：
Church, CC
As currently defined, the mechanical index (MI) uses only two parameters, peak rarefactional pressure and center frequency. The effect of another important factor, the pulse length (L-P), was investigated by numerical computations for cavitation threshold (P-t) similar to the analytical work underlying the MI. The effect of LP on P-t is small for the original threshold criterion (maximum temperature, T-max=5000 K), but can be substantial for the often-used criterion on maximum radius, R-max=2R(0). The potential for bioeffects produced by purely mechanical means (R-max) increases with LP, while those mediated by sonochemicals (T-max) does not. (C) 2005 Acoustical Society of America.
