Ultrasoundimhando ye elastic mechanical wave mune material medium. Icho chimiro chewave. Nokudaro, inogona kushandiswa kuona ruzivo rwehutano uye pathological yemuviri womunhu, kureva, diagnostic ultrasound. Panguva imwecheteyo, ihwowo chimiro chesimba. Kana imwe dosi ye ultrasound ichipararira muzvisikwa, kuburikidza nekudyidzana kwavo, inogona kukonzera shanduko mukushanda uye chimiro chezvipenyu, kureva, ultrasonic biological effect.

Migumisiro ye ultrasound pamasero inonyanya kusanganisira thermal effect, cavitation effect uye mechanical effect. Mhedzisiro yekupisa ndeyekuti kana ultrasound ichipararira mukati, kukwesha kunotadzisa kuzunguzika kwema molecular kunokonzerwa ne ultrasound uye inoshandura chikamu chesimba mukupisa kwakanyanya kwenzvimbo (42-43 ℃). Nekuda kwekuti tembiricha inouraya yakajairika i45.7 ℃, uye kunzwa kwekuzvimba kweLiu tissue kwakakwira kupfuura kuya kwenyama yakajairwa, mametabolism emasero eLiu akazvimba anokanganiswa nekupisa uku, uye kuumbwa kweDNA, RNA neprotein kunokanganisa, Saka kuuraya maseru egomarara pasina kukanganisa matishu akajairwa.

Cavitation effect ndeyokuti pasi pe ultrasonic irradiation, vacuoles inoumbwa muzvisikwa. Nekuzunguzika kwema vacuoles uye kuputika kwavo kwechisimba, mechanic shear pressure uye mhirizhonga inogadzirwa, izvo zvinoita kuti Liu azvimbe kubuda ropa, kuparara kwetishu uye necrosis.

Uye zvakare, kana bubble recavitation richitsemuka, rinoburitsa tembiricha yakakwira nekukurumidza (inenge 5000 ℃) uye kudzvanywa kwepamusoro (kusvika ku500 ℃) × 104pa), iyo inogona kugadzirwa nekupisa kwekuparadzana kwemhute yemvura OH radical uye H atomu, neOH radical uye The dedoxation reaction inogona kutungamirira kuHmer atomtiation reaction. lipid peroxidation uye kuuraya masero.

报错 笔记