1. Biomedical photoacoustic imaging by Paul Beard Interface Focus Volume 1(4):602-631 August 6, 2011 ©2011 by The Royal Society

2. Absorption coefficient spectra of endogenous tissue chromophores. Paul Beard Interface Focus 2011;1:602-631 ©2011 by The Royal Society

3. PAT detection geometries. Paul Beard Interface Focus 2011;1:602-631 ©2011 by The Royal Society

4. Backprojection PAT image reconstruction for a planar detection geometry. Paul Beard Interface Focus 2011;1:602-631 ©2011 by The Royal Society

5. PAT breast scanner with hemispherical detection geometry [27]. Paul Beard Interface Focus 2011;1:602-631 ©2011 by The Royal Society

6. PAT whole body small animal scanner based on a spherical detection geometry [62]. Paul Beard Interface Focus 2011;1:602-631 ©2011 by The Royal Society

7. PAT cylindrical scanner for small animal brain imaging [64] (a) experimental arrangement. Paul Beard Interface Focus 2011;1:602-631 ©2011 by The Royal Society

8. Use of a conventional ultrasound imaging probe for PA imaging. Paul Beard Interface Focus 2011;1:602-631 ©2011 by The Royal Society

9. (left) In vivo PAT images and (right) corresponding US images of a vein at the interior part of the medial lower leg obtained using a linear ultrasound array [44]. Paul Beard Interface Focus 2011;1:602-631 ©2011 by The Royal Society

10. (a) Schematic of FP-based photoacoustic scanner used to acquire a three-dimensional image of the vasculature in the palm [45]. Paul Beard Interface Focus 2011;1:602-631 ©2011 by The Royal Society

11. Acoustic-resolution photoacoustic microscopy (AR-PAM) system used for imaging the skin vasculature [94]. Paul Beard Interface Focus 2011;1:602-631 ©2011 by The Royal Society

12. Optical-resolution photoacoustic microscopy (OR-PAM) scanner used for in vivo imaging of the mouse ear [118]. Paul Beard Interface Focus 2011;1:602-631 ©2011 by The Royal Society

13. Dual mode intravascular PA and US imaging probe used to image ex vivo human coronary arteries [127]. Paul Beard Interface Focus 2011;1:602-631 ©2011 by The Royal Society

14. Photoacoustic imaging of lipid-rich atheromatous plaques [132]. Paul Beard Interface Focus 2011;1:602-631 ©2011 by The Royal Society

15. Combined ultrasound and PA imaging of a coronary artery stent embedded in a tissue phantom [173]. Paul Beard Interface Focus 2011;1:602-631 ©2011 by The Royal Society

16. In vivo photoacoustic ocular imaging: (a) PA vertical B-scan image acquired along the horizontal red line in (c) showing retinal blood vessel and the underlying retinal pigment epithelium (RPE) in the rat eye [120]. Paul Beard Interface Focus 2011;1:602-631 ©2011 by The Royal Society