title: In vivo optically encoded photoacoustic flowgraphy.
abstract: We present an optically encoded photoacoustic (PA) flow imaging method based on optical-resolution PA microscopy. An intensity-modulated continuous-wave laser photothermally encodes the flowing medium, and a pulsed laser generates PA waves to image the encoded heat pattern. Flow speeds can be calculated by cross correlation. The method was validated in phantoms at flow speeds ranging from 0.23 to 11  mm/s. Venous blood flow speed in a mouse ear was also measured.
authors: Ruiying
authors: R
authors: Zhang
authors: Lidai
authors: L
authors: Wang
authors: Junjie
authors: J
authors: Yao
authors: Cheng-Hung
authors: CH
authors: Yeh
authors: Lihong V
authors: LV
authors: Wang
mesh_terms: D000818:Animals; D001783:Blood Flow Velocity; D004423:Ear / Q000098:blood supply; D004867:Equipment Design; D018056:Hemorheology; D051379:Mice; D008819:Mice, Nude; D033401:Microscopy, Acoustic / Q000295:instrumentation / Q000379:methods* / Q000706:statistics & numerical data; D055620:Optical Phenomena; D019047:Phantoms, Imaging; D061088:Photoacoustic Techniques / Q000295:instrumentation / Q000379:methods* / Q000706:statistics & numerical data; D012212:Rheology / Q000295:instrumentation / Q000379:methods* / Q000706:statistics & numerical data