发明名称 |
Method and apparatus for photothermal therapy with adjustable spatial and/or temporal beam profile |
摘要 |
The safe therapeutic window for laser medicine (a ratio of the threshold power for detrimental outcome to that of a desired outcome) tends to decrease as pulse length decreases. This problem is addressed by use of beam shapes and/or pulse shapes that improve temperature uniformity in the treated tissue. A beam shape with an adjustable on-axis intensity minimum improves spatial temperature uniformity in treated tissue. A pulse shape with a relatively intense early part (to set the temperature rise), followed by a less intense late part having decreasing intensity with time (to maintain a constant or nearly constant temperature rise) improves temporal temperature uniformity in the treated tissue. A therapeutic window (TW) of at least 3 is often required to provide a sufficient safety margin in practice. In one experiment, it was demonstrated that the minimum pulse length to provide a TW of 3 could be decreased from 20 ms to 10 ms following these principles.
|
申请公布号 |
US2010168724(A1) |
申请公布日期 |
2010.07.01 |
申请号 |
US20090653652 |
申请日期 |
2009.12.15 |
申请人 |
SRAMEK CHRISTOPHER K;PALANKER DANIEL V |
发明人 |
SRAMEK CHRISTOPHER K.;PALANKER DANIEL V. |
分类号 |
A61B18/18 |
主分类号 |
A61B18/18 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|