Photoacoustic imaging
Photoacoustic Imaging
Photoacoustic imaging (pronunciation: /ˌfəʊtəʊəˈkuːstɪk ˈɪmɪdʒɪŋ/) is a medical imaging technique that combines ultrasound and laser-induced photoacoustic effects to create detailed images of the internal structures of the body.
Etymology
The term "photoacoustic" is derived from the Greek words "photo-", meaning light, and "acoustic", meaning sound. This reflects the technique's use of light and sound waves to create images.
Technique
In photoacoustic imaging, a short laser pulse is directed at the tissue. The absorbed light is converted into heat, leading to a rapid thermal expansion that generates an ultrasound wave. This wave is then detected by an ultrasound transducer and used to create an image.
Applications
Photoacoustic imaging is used in various medical fields, including oncology, cardiology, and neurology. It can provide detailed images of blood vessels, tumors, and other structures, making it a valuable tool for diagnosis and treatment planning.
Advantages
Compared to other imaging techniques, photoacoustic imaging offers several advantages. It can provide high-resolution images at greater depths than optical imaging techniques, and it does not require the use of ionizing radiation, unlike X-ray or CT scan.
Related Terms
External links
- Medical encyclopedia article on Photoacoustic imaging
- Wikipedia's article - Photoacoustic imaging
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