ʻO ke kani kani he hawewe ʻenekini elastic ma ke ʻano mea.He ʻano nalu.No laila, hiki ke hoʻohana ʻia e ʻike i ka ʻike physiological a pathological o ke kino kanaka, ʻo ia hoʻi, diagnostic ultrasound.I ka manawa like, he ʻano ikehu.Ke hoʻolaha ʻia kahi ʻano o ka ultrasound i loko o nā mea ola, ma o kā lākou launa pū ʻana, hiki ke hoʻololi i ka hana a me ke ʻano o nā mea ola, ʻo ia hoʻi, ka hopena o ka ultrasonic biological.

ʻO nā hopena o ka ultrasound ma nā pūnaewele ka nui o ka hopena wela, ka hopena cavitation a me ka hopena mechanical.ʻO ka hopena wela, ʻo ia ka wā e hoʻolaha ai ka ultrasound ma ke kikowaena, ke keʻakeʻa nei ka friction i ka haʻalulu molecular i hoʻokumu ʻia e ka ultrasound a hoʻohuli i kahi ʻāpana o ka ikehu i ka wela kiʻekiʻe kūloko (42-43 ℃).No ka mea he 45.7 ℃ ka wela make koʻikoʻi o ka ʻiʻo maʻamau, a ʻoi aku ka kiʻekiʻe o ka naʻau o ka pehu Liu ma mua o ka ʻiʻo maʻamau, ua hoʻopilikia ʻia ka metabolism o nā pūnae Liu pehu i kēia mahana, a ua pili ka synthesis o DNA, RNA a me ka protein. , Pela ka pepehi ana i na ma'i ma'i ma'i me ka pili ole i na kino ma'amau.

ʻO ka hopena Cavitation ka hoʻokumu ʻana o nā vacuoles i nā mea ola ma lalo o ka ultrasonic irradiation.Me ka haʻalulu o nā vacuoles a me kā lākou pahū ikaika, hana ʻia ka puʻe mechanical shear a me ka turbulence, ka hopena i ka pehu ʻana o ke koko Liu, ka ʻili a me ka necrosis.

Eia kekahi, i ka wā e haki ai ka ʻōpū cavitation, hoʻopuka koke ʻo ia i ka wela kiʻekiʻe (e pili ana i 5000 ℃) a me ke kaomi kiʻekiʻe (a hiki i 500 ℃) × 104pa), hiki ke hoʻokaʻawale i ka mahu wai e hana.OH radical a.H ʻātoma.ʻO ka hopena redox i hana ʻia e.OH radical a.Hiki i ka H atom ke alakaʻi i ka polymer degradation, enzyme inactivation, lipid peroxidation a me ka pepehi cell.