Board of Directors

Board of Directors


Roger Allen AM


BA (Hons), FACS

Roger joined the Board in June 2010 and was appointed Chairman in October 2015. Roger is a highly experienced entrepreneur and investor in early-stage growth companies in Australia and internationally. He built Computer Power Group (CPG) in the 1970s from a small start-up to a worldwide group of 3,000 people operating from 50 offices in 12 countries, listing on the ASX in 1987. In 1996 he co-founded Allen & Buckeridge, an early-stage venture capital fund with offices in Silicon Valley and Australia. He is dedicated to social entrepreneurship, especially to enterprises focused on indigenous economic development and digital health.

Roger has served on two Prime Ministers’ Science and Technology Councils and Advisory Boards, and was Deputy Chairman of Austrade from 1990 to 1997. Currently an adjunct professor in the Business School of the University of Technology Sydney, he has also lectured occasionally at the School of Entrepreneurship at INSEAD. Roger has been awarded the top two lifetime awards in the IT industry (CSIRO Tony Benson award and the Pearcey Medal for lifetime achievement) as well as an Order of Australia Honour for his services to the IT sector through leadership roles, venture capital investment and professional development, and in recognition of his support of the indigenous community and philanthropic interests. He is based in Sydney, Australia.

Roger is a member of the Audit and Risk Committee.


Ralph Highnam

Executive Director and CEO

BSc (Hons) 1st Class, MSc, PhD

Ralph, a founding Director of VHT, has been at the forefront of the digital breast imaging field for over 25 years. Initially a research scientist at the University of Oxford, Ralph’s innovative work in quantitative breast imaging technology led him to form first OXIVA Limited and then Mirada Solutions with Professor Sir John Michael Brady. Under Ralph’s leadership Mirada became the number-one provider of image registration and fusion tools before being acquired by CTI Molecular Imaging Inc. and later Siemens Medical Solutions USA, Inc.

Before founding VHT in 2009, Ralph consulted for many of the world’s top medical imaging companies, including R2, Siemens, Hologic and Dexela, as well as many leading breast screening programs. During this time, he continued his academic research as part of an international circle of collaborators.

Ralph is the author of numerous articles and, with Brady, the seminal book Mammographic Image Analysis. As CEO of VHT, Ralph is dedicated to providing the most accurate measurements possible of breast composition (“breast density”) in order to improve the health outcomes of women around the world. Based in Wellington, New Zealand, in 2015 he was named a Wellingtonian of the Year finalist.

Mike Brady

Professor Sir Mike Brady

Non-Executive Director

FREng, FMedSci, HonFIE

Mike, a founding director of VHT, is currently Professor of Oncological Imaging at the University of Oxford, having recently retired after 25 years as Professor of Information Engineering. He served for 20 years as a non-executive director and deputy chairman of the FTSE 250 company Oxford Instruments plc and for 10 years as a non-executive director of AEA Technology plc.

Mike is founding director of Perspectum Diagnostics, which performs liver image analysis by MRI, and Mirada Medical Limited, which develops medical image analysis software and is installed in almost 2000 hospitals worldwide; ScreenPoint, which develops machine learning methods for computer-aided diagnosis in mammography; Optellum, which develops software to classify lung nodules in CT; and Guidance Navigation Holdings, which develops systems to aid navigation of vessels near large structures.

Mike is the author of over 750 articles and 35 patents in computer vision, robotics, medical image analysis and artificial intelligence, and the author or editor of 10 reference books. He is based in Oxford, UK.

John Pavlidis 1

John Pavlidis

Non-Executive Director


John joined the VHT board in early 2015 with more than 25 years of medical device experience as an executive and company director, John currently serves as the President and CEO of VytronUS, Inc., a venture-backed start-up using novel catheter-based ultrasound and robotics technology to treat atrial fibrillation, a cardiac arrhythmia.

Prior to VytronUS, John was the President and CEO of Endoscopic Technologies, Inc., a leader in minimally invasive and endoscopic treatment of atrial fibrillation. Since 2007, John has also served on the board of directors of several health technology start-up companies, including U-systems, Inc., which pioneered automated breast ultrasound imaging as an adjunct to mammography for breast cancer screening and was acquired by GE Healthcare in 2012.

Previously, John served as President and CEO of R2 Technology Inc., the pioneer and leader in computer-aided detection of breast cancer, until Hologic Inc. acquired the company in 2006. Before joining R2 Technology, John was the president of the Ultrasound group at Siemens Healthcare, where he led the acquisition and integration of Acuson and subsequent growth of that company to $1 billion in revenue. He is based in Silicon Valley, California.


John Diddams

Non-Executive Director


John is the principal of an Australian CPA firm that provides companies with corporate advisory services. John has extensive knowledge and practical experience in the application of Australian corporations law, ASX Listing Rules, international accounting standards and corporate governance principles.

Over the past 25 years John has managed the processes to raise capital, perform due diligence and seek ASX listing for a number of enterprises, including IPOs for a wide range of diverse offerings. These include oil and gas interests, food and retail, a fine wool processing plant, an innovative telephony product, a biotech company, an Internet advertising initiative, a dental device for snoring and sleep apnoea, an indoor skydiving company, the NZ developer of the Martin Jetpack, Skydive the Beach Group Limited (now renamed Experience Co Limited) and most recently, Oliver’s Real Food Limited.

John is currently a Non-Executive Director of ASX-listed Experience Co Limited, an adventure tourism business operating in Australia and New Zealand and a Non-Executive Director of Oliver's Real Food Limited, a healthy fast food chain operating on the highways in south-eastern Australia.

John is Chair of the Audit and Risk Committee and is based in Sydney, Australia.

Lyn Swinburne

Lyn Swinburne AM

Non-Executive Director

Hon Doc (Social Sciences)

Lyn joined the Board in December 2015. Lyn is a prominent women’s advocate, inspirational speaker and long-standing spokesperson on behalf of Australians personally affected by cancer. Following her own diagnosis and treatment for breast cancer, in 1998 Lyn founded Breast Cancer Network Australia (BCNA), the peak national breast cancer consumer organisation with more than 130,000 members.

The creator of the Field of Women concept, Lyn led the development of BCNA’s Seat at the Table program, which provides trained and supported consumer representatives at advisory and decision-making forums nationally. She has been an invited public speaker at medical conferences globally and across Australia.

Lyn has received numerous awards for her work: in 2006 she was named an Australian of the Year finalist and appointed a Member of the Order of Australia, and in 2007 she was named Melburnian of the Year. More recently she was awarded an Honorary Doctorate from Swinburne University for advancing the cause of women affected by breast cancer. She has been appointed to a number of boards, including the National Breast and Ovarian Cancer Centre and Cancer Australia, by various national Health Ministers.

Lyn retired from her role as CEO of BCNA at the end of 2011 and is currently Chair of the Board of the Royal Women’s Hospital in Melbourne. She is based in Melbourne, Australia.

Lyn is a member of the Audit and Risk Committee.


Paul Reid

Non-Executive Director

BSc (Hons) Maths & Stats

Paul joined the Board in March 2018 and brings extensive commercial experience gained across a range of technology businesses, including SaaS businesses. Paul is currently Chair of Figured, Pukeko Pictures and Netlogix Holdings; Director for NZX-listed Comvita; and advisory board member to DOT Loves Data.

He has held a number of key executive roles in the transformation of businesses including NZ Post Group, Air New Zealand, MetService and Carter Holt Harvey. Paul is based in Wellington, New Zealand.