Srinath Rajagopal

Position: PhD Student
Room: Malet Place Engineering Building, 3.09
Address: Department of Medical Physics and Biomedical Engineering
University College London
Malet Place Engineering Building
Gower Street, London, WC1E 6BT


I joined the Department of Medical Physics and Biomedical Engineering at University College London (UCL) in October 2014. I am currently pursuing my PhD part-time and I am based full-time at the National Physical Laboratory (NPL), where I am a Senior Research Scientist within the Acoustics group. The financial support to undertake my PhD with UCL is provided by NPL. For my PhD, I am interested in developing photoacoustic sources capable of generating broad bandwidth (0-100MHz), planar (several millimetres) and high amplitude (> 2 MPa) ultrasound pulse for applications in ultrasound metrology. The sources are nanocomposites made of multi-walled carbon nanotubes and various polymeric materials. The physical makeup of the desired photoacoustic source is aided by k-Wave toolbox.

Journal Publications

1.T. Koukoulas, S. Robinson, S. Rajagopal, B. Zeqiri (2016): A comparison between heterodyne and homodyne interferometry to realise the SI unit of acoustic pressure in water. In: Metrologia, 53 (2), pp. 891–898, 2016. (Type: Journal Article | Links | BibTeX)
2.S. Rajagopal, N. Sadhoo, B. Zeqiri (2015): Reference characterisation of sound speed and attenuation of the IEC agar-based tissue-mimicking material up to a frequency of 60 MHz. In: Ultrasound Med. Biol., 41 (1), pp. 317–333, 2015. (Type: Journal Article | Links | BibTeX)
3.D. A. Kenwright, N. Sadhoo, S. Rajagopal, T. Anderson, C. M. Morgan, P. W. Hadoke, G. A. Gray, B. Zeqiri, P. R. Hoskins (2014): Acoustic assessment of a konjac–carrageenan tissue-mimicking material at 5–60 MHz. In: Ultrasound Med. Biol., 40 (12), pp. 2895–2902, 2014. (Type: Journal Article | Links | BibTeX)
4.S. Rajagopal, B. Zeqiri, P. N. Gelat (2014): Calibration of miniature medical ultrasonic hydrophones for frequencies in the range 100 to 500 kHz using an ultrasonically absorbing waveguide. In: IEEE Trans. Ultrason. Ferroelectr. Freq. Control, 61 (5), pp. 765–778, 2014. (Type: Journal Article | Links | BibTeX)
5.T. Koukoulas, S. Rajagopal, S. Robinson, B. Moss, B. Zeqiri, P. Theobald (2013): Primary ultrasonic interferometer photodiode characterization using frequency-modulated laser wavefront radiation. In: Metrologia, 50 (6), pp. 572–579, 2013. (Type: Journal Article | Links | BibTeX)
6.B. Zeqiri, G. Zauhar, S. Rajagopal, A. Pounder (2012): Systematic evaluation of a secondary method for measuring diagnostic-level medical ultrasound transducer output power based on a large-area pyroelectric sensor. In: Metrologia, 49 (3), pp. 368–381, 2012. (Type: Journal Article | Links | BibTeX)
7.S. Rajagopal, A. Shaw (2012): The buoyancy method - a potential new primary ultrasound power standard. In: Metrologia, 49 (3), pp. 327–339, 2012. (Type: Journal Article | Links | BibTeX)
8.J. W. Hand, A. Shaw, N. Sadhoo, S. Rajagopal, R. J. Dickinson, L. R. Gavrilov (2009): A random phased array device for delivery of high intensity focused ultrasound. In: Phys. Med. Biol., 54 (19), pp. 5675–5693, 2009. (Type: Journal Article | Links | BibTeX)

Conference Publications

1.S. Rajagopal, T. Sainsbury, B. E. Treeby, B. T. Cox (2017): Laser generated ultrasound sources using polymer nanocomposites for high frequency metrology. IEEE International Ultrasonics Symposium, 2017. (Type: Conference | Links | BibTeX)
2.B. Karaboce, Y. Gulmez, S. Rajagopal, A. Shaw (2011): Instantaneous input electrical power measurements of HITU transducer. Advanced Metrology for Ultrasound in Medicine, Journal of Physics: Conference Series, 279 , 2011. (Type: Conference | Links | BibTeX)
3.K. V. Jenderka, G. Durando, B. Karaboce, S. Rajagopal, A. Shaw (2011): Inter-laboratory comparison of HITU power measurement methods and capabilities. Advanced Metrology for Ultrasound in Medicine, Journal of Physics: Conference Series, 279 , 2011. (Type: Conference | Links | BibTeX)
4.P. Morris, A. Hurrell, E. Z. Zhang, S. Rajagopal, P. C. Beard (2006): A Fabry-Perot Fibre-Optic Hydrophone for the Measurement of Ultrasound Induced Temperature Change. IEEE International Ultrasonics Symposium, 2006. (Type: Conference | Links | BibTeX)