Professor Richard Dewhurst BSc, PhD, DSc
CPhys, CEng, FInstP, FInstNDT

Portrait  
Professor
Tel: +44 (0)161 306 4886
E-Mail: richard.dewhurst@manchester.ac.uk

Recent Publications
 

Roles:
European and Reviews Editor of Measurement Science and Technology
Fellow, Institute of Physics
Fellow, British Institute of NDT
Emeritus Professor, University of Manchester

Profile
Richard Dewhurst has been Professor of Instrumentation, with research in the area of measurement science and technology. Activities have included the development of sensor systems using laser-generated ultrasound, ultrasound and related instrumentation, and the development of optical sensing systems. A range of techniques have been exploited. They have included optical scattering and absorption phenomena, optical or ultrasonic spectroscopy and ultrasonic imaging methods. From these studies, new materials characterisation have been performed in solids, liquids and soft tissue; with applications to the non-destructive evaluation (NDE) of materials.

He is best known for his work in laser ultrasound. In the 1980s, his research group pioneered quantitative measurements in laser-generated ultrasound. Studies at first concentrated on laser ultrasound in opaque solids. These measurements, together with associated modelling, were the knowledge base that was a pre-requisite for much of the international research activity in laser-ultrasound that has continued to the present time, with significant applications in the aerospace industry. The field has developed from a scientific curiosity to an engineering measurement technology.

His interests are focused on measurement techniques for non-destructive evaluation (NDE). They offer new approaches to the characterisation of materials, and include research into miniaturised instrumentation for near-infrared spectroscopic measurements, and photoacoustics for potential healthcare applications. His group was the first to show that transient photoacoustics may be used to assess post-mortem arterial disease, with the potential of the technique to go in vivo by exploiting miniaturised probes. In ophthalmic measurements, metrology of the eye has been demonstrated with both porcine and bovine eyes. Photoacoustic skin tissue measurements have been undertaken, with measurements mainly in phantoms.

Signal and image processing plays a significant role in evaluation processes. Systems have exploited signal processing and image processing, such as the generation of B- , C- and D-scans to aid interpretation of defects or disease. Synthetic focusing aperture techniques (SAFT) and (F-SAFT) have been developed to enhance image resolution.

He was a founding member of the DTI M62 Sensors and Control Club, and has been both a Council Member of the British Institute of NDT, and of the Institute of Physics. He is a Fellow of the Institute of Physics, a Fellow of the British Instutute of NDT, and a College Member of EPSRC. Within the Institute of Physics, he is a member of the Materials and Characteristion Group where for two periods of office he has served as Chairman. He is presently the European and Reviews Editor of the international academic journal, Measurement Science and Technology (MST), published by the Institute of Physics.

In 1994, he won an award for Best Paper from the American Society for Non-destructive Testing (NDT); and in 1999 was awarded a similar prize from the Institute of Measurement and Control, UK. In 2003, he was awarded the highest ranking Prize, the Roy Sharpe Prize, from the British Institute of NDT for his research work on non-contact NDT, and for his involvement in the research of laser generation and detection of ultrasound. More recently, in 2005, he was part of a five-man UK EPSRC delegation to China to initiate research collaborations into non-destructive evaluation (NDE). From 2004-2007, he served on Program Committee for the Biomedical Optics Conference held in San Jose, organised by SPIE. In 2008, he served on the Scientific Advisory Committee for the first International Conference on Laser-Ultrasound, held in Montreal.

He has now retired to become Emeritus Professor at the University of Manchester.

Recent
Publications

RECENT PUBLICATIONS


140. “Application of a laser/EMAT system using shear and LS mode-converted waves”
P R Murray and R J Dewhurst
Ultrasonics, 40, 771-776, 2002.

141. “Estimation of wall thinning in mild steel using laser-ultrasound Lamb waves and a non-steady state photo-emf detector.
A S Murfin and R J Dewhurst
Ultrasonics, 40, 777-781, 2002.

142. “Non-contact laser/EMAT measurement systems for ultrasound B-scan imaging”
R J Dewhurst and P R Murray,
Review of Progress in Quantitative Non-destructive Evaluation, edited by D O Thompson and D E Chimenti, AIP, New York, 21, 348-355, 2002.

143. “A laser-ultrasound/EMAT imaging system”
R J Dewhurst and S Boonsang, Conference Proceedings of NDT 2002, British Institute of NDT Annual Conference, 47-52, 2002.

144. Enhancement of laser-ultrasound/EMAT signals form Rayleigh wave interaction at surface features”
S Boonsang and R J Dewhurst, Appl Phys Lett,, 82, 3348 –3350, 2003.

145. “Ophthalmic methods”,
P A Payne, R J Dewhurst, E S Rosen, A Fink, and A Sadr,
Official Journal of Patents, British Patent No 2 342 718, 17pp, 19th February 2003.
Also granted US Patent No 6652459, 25th November 2003.

146. “A laser-ultrasound/EMAT imaging system for near surface examination of defects”
R J Dewhurst, S Boonsang, and P R Murray,
Nondestructive Characterization of Materials XI, edited by R E Green, B B Djordjvic and M P Hentschel, Springer, Germany, 13 – 19, 2003

147. “Apparatus and methods for analyzing bodily tissue”
R J Dewhurst and P A Payne, WO 03/011126, 13th February 2003.

148. “An algorithm development environment for an on-line FT-NIR spectrometer”
D. Kalamatianos, JM Edmunds, PE Wellstead, S Christie, MS Thorniley, RJ Dewhurst, Proc of SPIE, 5201, 138-145, 2003.

149. “Removal of Chewing Gum”
R J Dewhurst, L Li, and B McPhail
UK Patent No 0126763.2, submitted 3rd April 2003.

150. “Photoacoustic imaging using a frequency domain synthetic aperture focusing technique”
S Boonsang, J Zainal and R J Dewhurst, Conference Proceedings of NDT 2003, British Institute of NDT Annual Conference, 221-227, 2003.

151. “Modeling of near-field and far-field diffraction effects for optoacoustic measurements in tissue”
S Boonsang and R J Dewhurst, Proc SPIE, 5486, 257-266, 2004.

152. “Photoacoustic imaging using a frequency domain synthetic aperture focusing technique”
S Boonsang, J Zainal and R J Dewhurst, Proc SPIE, 5486, 267-273, 2004.

153 “Characterisation and evaluation of portable FT-NIR instrumentation for life science measurements”
D Kalamatianos, R J F Houston, J Edmunds, D Allen, P E Wellstead, M S Thorniley and R J Dewhurst,
Proc SPIE, 5486, 35-42, 2004.

154. “Synthetic aperture focusing techniques in time and frequency domains for photoacoustic imaging”
S Boonsang, J Zainal and R J Dewhurst, Insight, 46, 196-199, 2004.

155. “Real –time measurement of acoustic field displacements using ultrasonic vibrometry”, A. Kannath and R. J. Dewhurst, Measurement Science and Technology, 15, N59-N66, 2004.

156. The use of X-ray microtomography to determine relationships between microstructure and mechanical behaviour in nuclear graphite” L J Babout, A Hodgkins, R J Dewhurst, T J Marrow, A Fok, B J Marsden, and P M Mummery, Proc of the 2nd International Topical Meeting on High Temperature Reactor Technology, Beijing, China, 2004, paper E23, 1-10, 2004.

157. “Enhancement of laser-ultrasound/electromagnetic acoustic transducer signals from Rayleigh wave interaction with surface-breaking artificial defects”
S Boonsang and R J Dewhurst, Ultrasonics, 53, 512-523, 2005.

158. “Pulsed photoacoustic signal characterisation incorporating near- and far-field diffraction effects.”
S Boonsang and R J Dewhurst, Measurement Science and Technology, 16, 885-899, 2005.

159. NDT in China – from West to East.
R J Dewhurst, Insight, 47, 366-367, 2005.

160. “A new magnetic configuration for a small in-plane EMAT applied to laser-ultrasound measurements: modeling and validation”
B Dutton, S Boonsang and R J Dewhurst, Sensors and Actuators A 125, 249-259, 2006.

161. “A sensitive electromagnetic acoustic transducer for picometer scale ultrasonic displacement measurements”
S Boonsang and R J Dewhurst, Sensors and Actuators, 127, 345-354, 2006.

162. “Decay of photoacoustic signal from biological tissue irradiated by near infra-red laser pulses”
G Gondek, T Li, R J M Lynch and R J Dewhurst, J Biomedical Optics, 11(5), 054036-4, 2006.

163. “Anisotropy measurements in metal alloys using a laser/electromagnetic acoustic transducer array system
B Dutton and R J Dewhurst, Applied Physic Letters, 89, 101916-3, 2006.

164. “Modelling of magnetic fields to enhance the performance of an in-plane EMAT for laser-generated ultrasound”
B. Dutton, S. Boonsang and R.J. Dewhurst, Ultrasonics, 44, e657- e665, 2006.

165. “Amplitude decay of photoacoustic signals in biological tissue when irradiated by nanosecond laser pulses”
R J Dewhurst, T Li, and G Gondek., Proc of SPIE, Vol 2437-74, 12pp, 2007.

166. “Graphite anisotropy measurements using laser-generated ultrasound”,
B Dutton and R J Dewhurst, Journal of Optics A: Pure and Applied Optics, 9, S7-S118, 2007.

167. “Announcing the 2006 Measurement Science and Technology Outstanding Paper Awards”
J Foss, R J Dewhurst, K Fujii and P Regtien, Measurement Science and Technology , (editorial), 18, 7, 3pp, 2007.

168. “A laser-ultrasound system for characterisation of rear surface defects: image processing based on the generalized Radon transform”,
S Boonsang, B Dutton, R J Dewhurst, Ultrasonics , in preparation.

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RECENT CONFERENCES


129. “Laser-ultrasound imaging: from TOFD in NDT to measurements in biotissue”, R J Dewhurst , J Zainal and S Boonsang, BINDT, Harrogate, 13th-15th September 2005.

130. “A novel electromagnetic acoustic transducer for biomedical photoacoustic imaging”
S Boonsang and R J Dewhurst, 12th Int'l Conference on BioMedical Engineering (ICBME 2005), Singapore, 7th-10th December, 2005.

131. “Laser-generated ultrasound for velocity anisotropy measurements” B Dutton and R J Dewhurst, Photonics NW 06, Manchester, April 2006.

132. “Photoacoustic imaging systems for detection of small features in engineering materials and tissue phantoms” R Dewhurst, G Gondek and T Li, Photonics NW 06, Manchester, 28th April 2006.

133. “Transient photoacoustic signal decay in bio-tissue irradiated in vitro by Nd:YAG laser pulses”
G Gondek, T Li, RJM Lynch, and R J Dewhurst, Photon 06, Manchester, 4th -7th September 2006.

134. “Graphite anisotropy measurements using laser-generated ultrasound” B Dutton and R J Dewhurst, Photon 06, Manchester, 4th -7th September 2006.

135. “Photoacoustic imaging in biological tissue: features and issues” T Li, G Gondek and R J Dewhurst, Biophotonics: Technology and Applications, IOP Meeting, London, 7th December 2006.

136. “Amplitude decay of photoacoustic signal generated in biological tissue when irradiated by nanosecond laser pulses” R J Dewhurst, T Li, and G Gondek , BIOS 2007, San Jose, 20-25th Jan, 2007.

137. “Photoacoustics: a new imaging modality”, R J Dewhurst, Imaging Event, Manchester, 28th Feb 2007.

138. “Laser-ultrasound imaging for non-destructive testing”, R J Dewhurst, G Gondek , B Dutton and T Li, International Scientific Advisory Board, Poster, Photon Science Institute, Manchester, 15th March 2007.

139. “Laser/EMAT measurement systems for materials evaluation” R Dewhurst and B Dutton, Sensors & their Applications XIV, Liverpool John Moores University 11th – 13th September 2007. Journal of Physics: Conference Series, 76 (2007) 012013.

140. “Advanced photoacoustic imaging in biological tissue”, T Li and R J Dewhurst, Anglo-French Physical Acoustics Conference, Ashford, Kent, 16th-18th January, 2008.

141. INVITED “The potential of medical imaging using laser-generated ultrasound”, R J Dewhurst, Rank PrizeMini-Symposium on the topic of 'Optical Aspects of Non-destructive Testing' , Grasmere, Cumbria 19th - 22nd May 2008.

142. “Photoacoustic imaging and pressure predictions in biological tissue”, T Li and R J Dewhurst, Rank PrizeMini-Symposium on the topic of 'Optical Aspects of Non-destructive Testing' , Grasmere, Cumbria 19th - 22nd May 2008.