课题基金 / 基金详情

EXCITATION WAVELENGTH DEPENDENT RAMAN SPECTROSCOPY OF ARTERY

EXCITATION WAVELENGTH DEPENDENT RAMAN SPECTROSCOPY OF ARTERY
激发波长相关的动脉拉曼光谱
批准号:
6121224
负责人:
JASON MOTZ
金额:
$1.63万
依托单位国家:
美国
项目类别:
财政年份:
1999
资助国家:
美国
项目状态:
已结题
起止时间:
1999-06-01 至 2000-05-31

项目摘要

项目成果

JASON MOTZ的其他基金

相关文献

中文摘要
翻译
我们建立了惯性约束机理的理论
英文摘要
We have formulated the theory of inertially confined mechanism for ablation of biological tissues. The motivation behind this theory is the observation that the energy density (E) absorbed in the tissue subsurface at ablation threshold (for short pulses) is typically ten times smaller than that required for vaporization, and of the order E ~ 200-300 J/cm3. Thus vaporization alone is inadequate to explain pulsed ablation, and other physical mechanisms must be responsible for tissue removal on this short time scale. By studying the steam tables (water is used as a thermodynamic model for soft tissue), one finds that an increase in energy density of 300 J/cm3, under conditions of constant volume, is sufficient to generate a pressure of 900 bars in the tissue. The condition of constant volume is assumed because, for short pulses (less than several hundred nanoseconds), the tissue is inertially confined (it lacks sufficient time to expand). Ablation occurs when the lase r-induced pressure exceeds a threshold value (which is dependent on the structural properties of the tissue) and proceeds through a disassembly of the tissue at the microcracks and subsequent acceleration away from the crater due to the pressure gradient.
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OPTICAL FIBER PROBE FOR BIOMEDICAL RAMAN SPECTROSCOPY
OPTICAL FIBER PROBE FOR BIOMEDICAL RAMAN SPECTROSCOPY
DEVELOPMENT OF RAMAN SPECTROSCOPY FOR IN VIVO DIAGNOSIS OF ATHEROSCLEROSIS
EXCITATION WAVELENGTH DEPENDENT RAMAN SPECTROSCOPY OF ARTERY