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Published January 2007 | Published
Journal Article Open

Photoacoustic imaging of the microvasculature with a high-frequency ultrasound array transducer


Visualization of microvascular networks could provide new information about function and disease. We demonstrate the capabilities of a 30-MHz ultrasound array system for photoacoustic microscopy of small (≤300μm) vessels in a rat. 3D images obtained by translating the array in the elevation direction are compared with photographs of excised skin. The system is shown to have 100-μm lateral resolution, 25-μm axial resolution, and 3-mm imaging depth. To our knowledge this is the first report on photoacoustic microscopy of the microvasculature with a high-frequency array transducer. It is anticipated that the system can be used for studying and diagnosing a number of diseases including cancer, atherosclerosis, dermatological disorders, and peripheral microvascular complications in diabetes.

Additional Information

© 2007 SPIE. Paper 06299LRR received Oct. 24, 2006; revised manuscript received Dec. 21, 2006; accepted for publication Dec. 22, 2006; published online Mar. 1, 2007. This project was sponsored by NIH grants R01 EB000712 and R01 NS46214.

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