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首页> 外文会议>Photons Plus Ultrasound: Imaging and Sensing 2006; Progress in Biomedical Optics and Imaging; vol.7, no.9 >Photoacoustic and Thermoacoustic Tomography with both Optical and Electrical Contrasts
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Photoacoustic and Thermoacoustic Tomography with both Optical and Electrical Contrasts

机译：具有光学和电学对比的光声和热声层析成像

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摘要

The absorption of electromagnetic energy causes thermal expansion and induces acoustic waves in biological tissues. Various tissues present particular characteristics in their absorption spectra. To acquire both photoacoustic and thermoacoustic images with multiple contrasts that reflect the absorption of electromagnetic energy, biological tissues are stimulated using laser and microwave pulses, respectively. Muscles with a rich blood supply strongly absorb green optical radiation, which provides excellent optical contrast. High water content tissues, such as connective tissue and muscle tissue, display high contrast to fatty tissues when imaged using microwave radiation. Most cancerous tissues have higher water and ionic concentrations, two characteristics that are also associated with angiogenesis and hemoglobin oxygen saturation. Therefore, cancer diagnosis based on information from tissue properties over an electromagnetic spectrum from microwave to optical bands can be more accurate than was previously available.
机译：电磁能的吸收引起热膨胀并在生物组织中引起声波。各种组织在其吸收光谱中呈现出特定的特征。为了获得具有反映电磁能量吸收的多个对比的光声和热声图像，分别使用激光和微波脉冲刺激生物组织。具有丰富血液供应的肌肉会强烈吸收绿色的光辐射，从而提供出色的光学对比度。当使用微波辐射成像时，高含水量的组织（例如结缔组织和肌肉组织）与脂肪组织显示出高对比度。大多数癌变组织具有较高的水和离子浓度，这两个特征也与血管生成和血红蛋白氧饱和度有关。因此，基于从微波到光学带的电磁频谱上的组织特性信息得到的癌症诊断可以比以前更准确。

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