JP6778772B2 - 標的とされた熱ショックタンパク質を刺激する及びタンパク質修復を促進するためのパルス状の電磁療法および超音波治療法 - Google Patents
標的とされた熱ショックタンパク質を刺激する及びタンパク質修復を促進するためのパルス状の電磁療法および超音波治療法 Download PDFInfo
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Description
I(r)=P/(4πr2) [1]
式中、Pは合計の超音波パワーを示す。
rでの持続時間tpの短パルスの終端での温度上昇は以下であり、
dT(tp)=Pαtp/(4πCvr2) [2]
式中、αは吸収係数であり、Cvは比熱容量である。そうであるまで、tpでの熱拡散距離がrに匹敵するようになるところまでrが達成されるまで、または集束ビームの回折限界に到達するまで、これは当てはまる。より短いrについては、温度上昇は、rとは本質的に無関係である。例として、回折限界が、熱拡散によって判定された距離より短い半径方向距離で到達されたと仮定する。ここで、
rdif=(4Dtp)1/2 [3]
であり、式中、Dが熱拡散係数であり、r<rdifに関して、tpでの温度上昇は以下である:
dT(rdif、tp)=3Pα/(8πCvD) r<rdifである場合 [4]
したがって、パルスの終端で、温度上昇を記録することができる:
dtp(r)={Pαtp/(4πCv}[(6/rdif 2)U{rdif−r)+(1/r2)U](r−rdif)] [5]
熱拡散方程式に関するグリーン関数
G(r,t)=(4ΩDt)−3/2 exp[−r2/(4Dt)] [6]
をこの初期の温度分布に適用すると、時間tの焦点r=0での温度dT(t)が、以下であることが分かった:
dT(t)=[dTo/{(1/2)+(π1/2/6)}][(1/2)(tp/t)3/2+(π1/2/6)(tp/t)] [7]
とともに
dTo=3Pα/(8πCvD) [8]
Ω=AN[{tp(2kBTo 2/}(3EdTo)exp[−(E/kB)1/(To+dTo+dTN(NtI))]
+exp[−(E/kB)1/(To+dTN(NtI))]] [12]
式中、以下である:
合計の超音波パワー: 5.8ワット−17ワット
パルス時間 0.5秒
パルス間隔 5秒
合計の列持続時間(N=10) 50秒
より大きな内容積の処置を促進するために、SAPRAシステムを使用することができる。
Claims (4)
- 組織に光刺激を提供するシステムであって、該システムは、
5.8−17ワットの合計のパワー、約0.5秒のパルス持続時間、約5秒のパルスの間隔を有する超音波的または電磁的なパルス状光線を生成する装置、および
組織の領域を光刺激するために装置によって生成されたパルス状光線を組織上に選択的に適用するためのパルス状光線の送達機構を含み、
パルス状光線が、組織の温度上昇を2分以上にわたって摂氏1℃以下に維持しながら、少なくとも摂氏10℃の組織のスパイク温度の上昇をもたらす、システム。 - パルス状光線を生成する装置は、複数の超音波ビームを生成する超音波ジェネレーターを含む、請求項1に記載のシステム。
- 超音波ジェネレーターは超音波振動子を含む、請求項1または2に記載のシステム。
- 超音波ジェネレーターは、約50秒間にわたって一筋の10パルスの超音波ビームを生成する、請求項1から3のいずれか1つに記載のシステム。
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