Qifa Zhou, Sienting Lau, Dawei Wu, K. Kirk Shung, Piezoelectric Films for High Frequency Ultrasonic Transducers in Biomedical Applications, Progress in Material Science, Vol. 56, 139-174, 2011. Bin Rao, Konstantin Maslov, Amos Danielli, Ruimin Chen, K. Kirk Shung, Qifa Zhou, and Lihong V. Wang, Real-time four-dimensional optical-resolution photoacoustic microscopy with Au nanoparticle-assisted subdiffraction-limit resolution, Optics Letters, 36(7), pp. 1137-1139, 2011. Huihua Kenny Chiang, Qifa Zhou, M. Susan Mandell, M. Tsou, S. Lin, K. Kirk Shung, Chien Kun Ting, Eyes in the needle: Novel Epidural Needle with Embedded high-frequency ultrasound transducer- Epidual access in porcine model, Anesthesiology, Vol. 114, No. 6, 114, 2011. Xiang Li, Jiechen Yin, Changhong Hu, Qifa Zhou, K. Kirk Shung and Zhongping Chen, High-resolution co-registered intravascular imaging with integrated ultrasound and optical coherence tomography probe, Applied Physics Letters, 97, 133702, 2010. Naoki Matsuoka, Dong-Guk Paeng, Ruimin Chen, Hossein Ameri, Walid Abdallah, Qifa Zhou, Amani Fawzi, K. Kirk Shung, Mark Humayun, “Ultrasonic Doppler Measurements of Blood Flow Velocity of Rabbit Retinal Vessels Using a 45 MHz Angled Needle Transducer”, “Graefes” Archive for Clinical and Experimental Ophthalmology, DOI10.1007/s004/7-009-1298-9, 2010. S. Jiao, M. Jiang, J. Hu, A. Fawzi, Q. F. Zhou, K. K. Shung, C. A. Puliafito, and H. F. Zhang, "Photoacoustic ophthalmoscopy for in vivo retinal imaging," Optics Express, 18(4), 3967-3972, 2010. Jing Wang, Tan Liu, Shuliang Jiao, Ruimin Chen, Qifa Zhou, K. Kirk Shung, Lihong V. Wang, and Hao F. Zhang, “Saturation effect in functional photoacoustic imaging”, Journal of Biomedical Optics, 15 (2), 010512-1, 2010. Jiechen Yin, Hao-Chung Yang, Xiang Li, Jun Zhang, Qifa Zhou, Changhong Hu, K. KirkShung, and Zhongping Chen, Integrated intravascular optical coherence tomography (OCT) - ultrasound (US) imaging system, Journal of Biomedical Optics, Vol. 15, No. 1. 010512-1, 2010. B. P. Zhu, J. X. Han, J. Shi, K. K. Shung, Q. Wei and Y. H. Huang, M. Kosec, Q. F. Zhou., Lift-off PMN-PT Thick Film for Transducer and Ultrasonic Biomicroscopy, J. American Ceramic Society, Vol. 93, No. 10, 2929-31, 2010 2010. Qifa Zhou, Dawei Wu, Changgeng Liu, Benpeng Zhu, Frank Djuth and K. Kirk. Shung, Micro-machined High Frequency (80 MHz) PZT Thick Film Linear Arrays, IEEE Transactions on ultrasonics, Ferroelectrics, and Frequency, Vol. 57, No. 10, 2213-20, 2010. Joon-Mo Yang, Konstantin Maslov, Hao-Chung Yang, Qifa Zhou, K. Kirk Shung, and Lihong V. Wang, Photoacoustic endoscopy, Optics Letters, 34(10), pp. 1591-1593, 2009. Chih-Chung Huang, Ruimin Chen, Po-Hsiang Tsui, Qifa Zhou, Mark S. Humayun, and K. Kirk Shung, Measurements of attenuation coefficient for evaluating the hardness of cataract lens by a high frequency ultrasonic needle transducer, Physics in Medicine and Biology, 54, pp.5981–5994, 2009. Ping Sun, Yolanda Zhang, Fei Yu, Elizabeth Parks, Althea Lyman, C. Wu, Chang-Hong Hu, Qifa Zhou, Kirk Shung, Ching-Ling Lien, Tzung K. Hsiai , Electrocardiograms to study post- ventricular amputation of Zebrafish Heart, Annual of Biomedical Engineering, 37(5):890-901, 2009.