Photoacoustic imaging is a biomedical imaging modality based on the photoacoustic effect. In photoacoustic imaging, non-ionizing laser pulses are delivered into biological tissues. Some of the delivered energy will be absorbed and converted into heat, leading to transient thermoelastic expansion and thus wideband (i.e. MHz) ultrasonic emission. The generated ultrasonic waves are detected by ultrasonic transducers and then analyzed to produce images.
Photoacoustic Imaging System
1. Optical contrast for blood and molecular imaging.
2. High-resolution at depth.
3. Real-time Non-invasive.
4. Anatomical, functional and molecular data.
Applications and Uses
Photoacoustic imaging is a new in vivo hybrid imaging modality that
combines the sensitivity and contrast of optical imaging with the depth
and resolution of ultrasound. When pulsed laser light illuminates
tissue, the optical absorbers there (such as hemoglobin) undergo
thermoelastic expansion, generating an acoustic pressure wave
which is detected with an ultrasound transducer.
The Vevo LAZR system incorporates photoacoustic imaging into
high-resolution ultrasound. The ultrasound imaging provides a
high-resolution frame-of-reference for identifying anatomy, while
the photoacoustic imaging enables functional measurements such
as oxygen saturation, total hemoglobin and the microdistribution
Editor: Xiaofang Tan