Srinath Rajagopal

Srinath Rajagopal

Position: PhD Alumni
Email: srinath.rajagopal.14@ucl.ac.uk

About

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.

M. Bakaric; P. Fromme; A. Hurrell; S. Rajagopal; P. Miloro; B. Zeqiri; B. T. Cox; B. E. Treeby

Measurement of the temperature-dependent output of lead zirconate titanate transducers Journal Article

In: Ultrasonics, 114 , pp. 106378, 2021.

Links | BibTeX

2.

S. Rajagopal; B. T. Cox

Modelling laser ultrasound waveforms: The effect of varying pulse duration and material properties Journal Article

In: Journal of the Acoustical Society of America, 149 (3), pp. 2040-2054, 2021.

Abstract | Links | BibTeX

3.

S. Rajagopal; B. T. Cox

100 MHz bandwidth planar laser-generated ultrasound source for hydrophone calibration Journal Article

In: Ultrasonics, 108 , pp. 106218, 2020.

Links | BibTeX

4.

S. Rajagopal; T. Sainsbury; B. E. Treeby; B. T. Cox

Laser generated ultrasound sources using carbon-polymer nanocomposites for high frequency metrology Journal Article

In: J. Acoust. Soc. Am., 144 (2), pp. 584-597, 2018.

Links | BibTeX

5.

T. Koukoulas; S. Robinson; S. Rajagopal; B. Zeqiri

A comparison between heterodyne and homodyne interferometry to realise the SI unit of acoustic pressure in water Journal Article

In: Metrologia, 53 (2), pp. 891–898, 2016.

Links | BibTeX

6.

S. Rajagopal; N. Sadhoo; B. Zeqiri

Reference characterisation of sound speed and attenuation of the IEC agar-based tissue-mimicking material up to a frequency of 60 MHz Journal Article

In: Ultrasound Med. Biol., 41 (1), pp. 317–333, 2015.

Links | BibTeX

7.

D. A. Kenwright; N. Sadhoo; S. Rajagopal; T. Anderson; C. M. Morgan; P. W. Hadoke; G. A. Gray; B. Zeqiri; P. R. Hoskins

Acoustic assessment of a konjac–carrageenan tissue-mimicking material at 5–60 MHz Journal Article

In: Ultrasound Med. Biol., 40 (12), pp. 2895–2902, 2014.

Links | BibTeX

8.

S. Rajagopal; B. Zeqiri; P. N. Gelat

Calibration of miniature medical ultrasonic hydrophones for frequencies in the range 100 to 500 kHz using an ultrasonically absorbing waveguide Journal Article

In: IEEE Trans. Ultrason. Ferroelectr. Freq. Control, 61 (5), pp. 765–778, 2014.

Links | BibTeX

9.

T. Koukoulas; S. Rajagopal; S. Robinson; B. Moss; B. Zeqiri; P. Theobald

Primary ultrasonic interferometer photodiode characterization using frequency-modulated laser wavefront radiation Journal Article

In: Metrologia, 50 (6), pp. 572–579, 2013.

Links | BibTeX

10.

B. Zeqiri; G. Zauhar; S. Rajagopal; A. Pounder

Systematic evaluation of a secondary method for measuring diagnostic-level medical ultrasound transducer output power based on a large-area pyroelectric sensor Journal Article

In: Metrologia, 49 (3), pp. 368–381, 2012.

Links | BibTeX

11.

S. Rajagopal; A. Shaw

The buoyancy method - a potential new primary ultrasound power standard Journal Article

In: Metrologia, 49 (3), pp. 327–339, 2012.

Links | BibTeX

12.

J. W. Hand; A. Shaw; N. Sadhoo; S. Rajagopal; R. J. Dickinson; L. R. Gavrilov

A random phased array device for delivery of high intensity focused ultrasound Journal Article

In: Phys. Med. Biol., 54 (19), pp. 5675–5693, 2009.

Links | BibTeX

Conference Publications

1.

S. Rajagopal; T. Sainsbury; B. E. Treeby; B. T. Cox

Laser generated ultrasound sources using polymer nanocomposites for high frequency metrology Conference

IEEE International Ultrasonics Symposium, 2017.

Links | BibTeX

2.

B. Karaboce; Y. Gulmez; S. Rajagopal; A. Shaw

Instantaneous input electrical power measurements of HITU transducer Conference

Advanced Metrology for Ultrasound in Medicine, Journal of Physics: Conference Series, 279 , 2011.

Links | BibTeX

3.

K. V. Jenderka; G. Durando; B. Karaboce; S. Rajagopal; A. Shaw

Inter-laboratory comparison of HITU power measurement methods and capabilities Conference

Advanced Metrology for Ultrasound in Medicine, Journal of Physics: Conference Series, 279 , 2011.

Links | BibTeX

4.

P. Morris; A. Hurrell; E. Z. Zhang; S. Rajagopal; P. C. Beard

A Fabry-Perot Fibre-Optic Hydrophone for the Measurement of Ultrasound Induced Temperature Change Conference

IEEE International Ultrasonics Symposium, 2006.

Links | BibTeX

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