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PACT creates in vivo 3D functional imaging of the brain
09 Jun 2021
Latest advance from Caltech group demonstrates photoacoustic tomography as route to brain imaging.
Lihong Wang: novel photoacoustic applications
Photoacoustic computed tomography (PACT) builds on the principles of photoacoustic imaging to create images of blood vessels and angiographic structures.
The technique uses non-ionizing laser pulses to briefly heat up an absorbing target before allowing it to cool, causing an expansion that in turn creates an ultrasound signal. That signal can then be reconstructed in a manner analogous to functional MRI, generating an image showing the distribution of optical absorption inside the target.
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