Paul Evans

Paul Evans

Professor of Applied Imaging Science

School of Science & Technology

Staff Group(s)
Computing and Technology

Role

Paul Evans is Distinguished Professor of Applied Imaging Science and Head of the Imaging Science Group. He is the Prime and Principal Investigator for a $4.4 million programme of research to develop next-generation 3D material specific X-ray scanners

Career overview

He is founder of HALO X-ray Technologies Ltd.

Distinguished Professor Evans was winner of the Institute of Physics (IOP) Dennis Gabor Medal and Prize for the industrial application of physics (2017). Professor Evans was also the winner of the Times Higher Education THE Prize for Outstanding contribution to innovation and technology (2016).  His research group spearheaded the Queen’s Anniversary Prize awarded to Nottingham Trent University for world class research, “safety and Security of Citizens” (2015).

Research areas

Professor Evans’ areas of research include the design of vision systems and 3D image sensor packages for visual inspection, the extraction of coordinate data and materials discrimination information. This includes projects involving:

3D X-ray Imaging

Employing three interrelated techniques; Kinetic Depth Effect or KDEX Imaging, Laminography and Binocular Stereoscopic Imaging. A major advance is the production of dynamic imagery from a single X-ray source and a static arrangement of linear X-ray sensors. The image capture time is the same as conventional 2D X-ray systems. This work is in collaboration with the UK Home Office Science and Technology Group.

X-ray Diffraction (XRD) and Absorption Tomography

This work was originally funded under the Innovative Research Call (IRC) part of the UK CONTEST strategy in partnership with the DHS. Ongoing work is funded by the Department of Homeland Security, Science and Technology Directorate, Homeland Security Advanced Research Projects Agency, Explosives Division through the Advanced X-ray Material Discrimination Program; contract HSHQDC-15-C-B0036.

X-ray Materials Identification

Novel techniques for the identification of materials employing coherently scattered X-rays are currently under investigation and development. This project is funded under the Innovative Research Call in Explosives and Weapons Detection (2007), a cross-government programme sponsored by Home Office Scientific Development Branch (HOSDB); Department for Transport (DfT); Centre for the Protection of National Infrastructure (CPNI); and Metropolitan Police Service (MPS).

Image Processing

The synthesis of intermediary view X-ray images from a sequence of sensor views is under investigation. This work is in collaboration with the UK Home Office Science and Technology Group and the US Department of Homeland Security. The programme is funded by the EPSRC.

X-ray Sensors

A new type of materials discriminating sensor, which reduces the total number of scintillation elements by 50%, has been developed. The resultant imaging performance is comparable to conventional dual-energy sensors and has formed the basis for a commercial product. This work was funded by the EPSRC and undertaken in collaboration with the UK Home Office Science and Technology Group.

X-ray Materials Discrimination

A range of image processing techniques utilising basis materials decomposition (BMD) for improved materials discrimination is under investigation. This work is in collaboration with the UK Home Office Science and Technology Group and was originally funded by the EPSRC.

Psychological Human Factors Evaluation

This research is funded by the Science and Technology Directorate within the USA Dept of Homeland Security and is in collaboration with the UK Home Office Science and Technology Group. Our work seeks to evaluate the contributions of depth information to the detection and identification of objects in X-ray scans of luggage.

Key research grants include:

J.P.O. Evans; HALO X-ray Imaging; Department of Homeland Security, Science and Technology Directorate, Homeland Security Advanced Research Projects Agency, Explosives Division through the Advanced X-ray Material Discrimination Program; contract HSHQDC-15-C-B0036 (2015-ongoing) $4.4 Million.

J.P.O. Evans; ACID - Accelerated Contraband Identification by Diffraction (ACID); STFC CLASP (2016-2017) £108k.

K Rogers (Cranfield U); J.P.O. Evans (NTU); N. Stone (Exeter U); R. M Martin (Bristol U); P. Zioupos (Cranfield U); Grant title: Point-of-Care High Accuracy Fracture Risk Prediction (EP/K020196/1); Collaborators: HALO X-ray Technologies Ltd; Radius Diagnostics Ltd; EPSRC; (2013-16); £776k (£302k to NTU).

S. Godber (HALO X-ray Technologies Ltd); J.P.O. Evans (NTU); K Rogers (Cranfield U) ; HALO Tunable X-ray Technology - High Speed Materials ID (TSB 131257); Tech. Inspired CRD (Fast track) – Electron., sensors & photonics; TSB; (2013-14); £150k.

J.P.O. Evans; HALO Tomography, Innovative Research Call in Explosives & Weapons Detection, Home Office Explosives & Weapons Detection Programme part of the UK CONTEST strategy; Home Office Scientific Development Branch (HOSDB), Dept for Transport (DfT), Centre for the Protection of National Infrastructure (CPNI), Metropolitan Police Service (MPS), US Dept of Homeland Security (DHS); (2011-14); £400k.

J.P.O. Evans; HotSpot X-ray Diffraction Imaging for Materials ID Innovative Research Call in Explosives & Weapons Detection, Home Office Explosives & Weapons Detection Programme part of the UK CONTEST strategy; Home Office Scientific Development Branch (HOSDB), Dept for Transport (DfT), Centre for the Protection of National Infrastructure (CPNI), Metropolitan Police Service (MPS); (2008–11); £452k.

J.P.O. Evans; Scatter enhanced 3D X-ray imaging (EP/F017596/1); Collaborators: Home Office Science & Technology Group, US Dept of Homeland Security (DHS), Durham Scientific Crystals Ltd, EPSRC; (2008-11); £306k (+Linked EPSRC EP/F017804/1 with K. Rogers at Cranfield U £138k)

J.P.O. Evans; EPSRC: Dynamic 3D imaging for X-ray security screening: crime feasibility study (EP/C520351/1); Collaborators: US Dept of Homeland Security (DHS), Home Office Science & Technology Group, 3DX-Ray Ltd; EPSRC; (2005-06) £61K (+ £13K cash from 3DX-ray Ltd)

J.P.O. Evans; Grant title: Kinetic Depth X-ray (KDEX) Imaging for Security Screening; Collaborators: Home Office Science & Technology Group, Sponsor: Science & Technology Directorate within the USA Dept of Homeland Security; Rolling 2004 to 2010; $458k

J.P.O. Evans; Grant title: Dynamic Stereoscopic X-ray Acquisition System; Home Office Science & Technology Group (funded via the DETR); (2000 to 2002); £62k.

J.P.O. Evans; Introduction of motion parallax into line-scan X-ray images; Home Office Science & Technology Group; (2000); £45k.

J.P.O. Evans; Integrated Stereoscopic X-ray Camera (GR/N08858/01) (assessed overall as Outstanding); Collaborator: Home Office, e2v Technologies plc, Image Scan Holdings plc; EPSRC; (2000-2002); £50k.

Opportunities to carry out postgraduate research towards an MPhil / PhD or MSc by research exist in all the areas identified above. Further information may be obtained from the Doctoral School.

External activity

  • Chartered Engineer (CEng)
  • Member of Institute of Engineering and Technology (MIET)
  • CTO of HALO X-ray Technologies Ltd
  • Member of US DHS’ Transportation Security Laboratory Human Factors Program
  • Counter-terrorism strategy (CONTEST)
  • Invited to speak at CED (Concealed Explosives Detection) Conference 2016 Invited by Chair, Downing College, Cambridge
  • Invited to speak at the Royal Institution of Great Britain; Faraday Theatre  Innovative Research Call in Explosives and Weapons Detection Showcase (2014) by the IRC panel representing; Home Office, DfT, CPNI, Dstl, MPS, US DHS
  • Invited to speak at the Gordon Research Conference on: Detecting Illicit Substances: Explosives & Drugs; Switzerland (2013)
  • Invited to speak at Central Hall Westminster (2011) Home Office Innovative Research Call conference (2011)
  • Invited personally by the UK Government Chief Scientific Adviser (GCSA) and Head of the Government Office for Science onto a National Panel of Experts (2010)
  • Invited Lecturer for University of Surrey (2004)
  • Invited Lecturer for Long term Research Principal Investigators Meeting (Atlantic City, US, 2004)
  • Programme Committee Member and Session Chair for SPIE International Symposium on Optical Science and Technology (2002-2003)
  • Invited Lecturer for SIRA General Meeting (2002)
  • Invited Lecturer for Society for Information Display (SID) (2000-2001)

Publications

Sporadic absorption tomography using a conical shell X-ray beam. Elarnaut F, Evans JPO, Downs D, Dicken AJ, Godber SX, Rogers KD, Optics Express, 2017, 25 (26)

Depth resolved snapshot energy-dispersive X-ray diffraction using a conical shell beam. Dicken AJ, Evans JPO, Rogers KD, Prokopiou D, Godber SX, Wilson M, Optics Express, 2017, 25 (18), 21321-21328

X-ray absorption tomography employing a conical shell beam. Evans JPO, Godber SX, Elarnaut F, Downes D, Dicken AJ, Rogers KD, Optics Express, 2016, 24 (25)

Energy-disperse X-ray diffraction using an annular beam. Dicken A, Evans JPO, Rogers KD, Greenwood C, Godber SX, Prokopiou D, Stone N, Clement JG, Lyburn I, Martin RM, Zioupos P, Optics Express, 2015, 23 (10), 13443-13454

X-ray diffraction from bone employing annular and semi-annular beams. Dicken AJ, Evans JPO, Rogers KD, Stone N, Greenwood C, Godber SX, Prokopiou D, Clement JG, Lyburn ID, Martin RM, Zioupos P, Physics in Medicine and Biology, 2015, 60 (15), 5803-5812

X-ray diffraction tomography employing an annular beam. Evans P, Rogers K, Dicken A, Godber S, Prokopiou D, Optics Express, 2014, 22 (10), 11930-11944

Combined X-Ray Diffraction And Kinetic Depth Effect Imaging. Evans P, Godber S, Chan JW, Rogers K, Rogers J, Dicken A, Optics Express, 2011, 19 (7)

High Intensity X-Ray Diffraction In Transmission Mode Employing An Analogue Of Poisson’s Spot. Evans P, Chan JW, Rogers K, Dicken A, Rogers J, Aip Applied Physics Letters, 2010, 97, (20)

Focal Construct Geometry – A Novel Approach To The Acquisition Of Diffraction Data. Evans P, Chan JW, Rogers J, Rogers K. Appl. Cryst, 2010, 43, 264-268

Position Determination Of Scatter Signatures - A Novel Sensor Geometry. Evans P, Chan JW, Rogers J, Rogers K, Dicken A, Talanta - The International Journal Of Pure And Applied Analytical Chemistry, 2010, 83 (2), 431-435

Wire transfer function analysis for castellated dual-energy X-ray detectors. Chan JW, Evans JPO, Yen SY, Monteith A, Applied Optics, 43 (35), 6413-6420

Stereoscopic imaging using folded linear dual-energy X-ray detectors. Evans JPO, Measurement Science and Technology, 2002, 12 (9), 1388-1397

See all of Paul Evans's publications...