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15 September 2022 | Story André Damons | Photo André Damons
Dr Osayande Evbuomwan, Prof Willy Vangu and Dr Gerrit Engelbrecht
Dr Osayande Evbuomwan, nuclear medicine specialist and Senior Lecturer, left, and Dr Gerrit Engelbrecht, Clinical Head of the Department of Nuclear Medicine at the UFS, right, with Prof Willy Vangu, Chief Specialist and Head of Nuclear Medicine at the University of the Witwatersrand, after his lecture.

There is no doubt that an institution like the University of the Free State (UFS), with its calibre and pedigree, needs a PET/CT machine (medical-imaging device that simultaneously and clearly reveals both anatomical details and metabolic processes within the body), particular in oncology, in improving the management of patients. 

This is according to Prof Willy Vangu, Chief Specialist and Head of Nuclear Medicine at the University of the Witwatersrand, who was a guest lecturer on 8 September 2022 at the Department of Nuclear Medicine at the UFS.

Positron emission tomography (PET) is a type of nuclear medicine imaging modality that measures the metabolic activity of the cells of body tissues. PET imaging is useful in the evaluation of patients with neurological, cardiac, infection, inflammation, and most importantly oncological conditions. Through its ability to detect metabolic changes very early, it can detect disease conditions that might not be easily detected on other forms of anatomical imaging.

Role of PET/CT in different clinical scenarios

In his lecture, Prof Vangu talked about the role of PET/CT in different clinical scenarios. By giving practical examples, he explained the role of PET/CT in different aspects of clinical medicine, including brain imaging for dementia, movement disorder and cerebrovascular reserve. 

“Looking at dementia, we will focus on one of diseases that is today becoming a major source of health concern, Alzheimer's disease. The latest Alzheimer's report that was published in 2018 stated that there are 50 million individuals currently suffering from Alzheimer's. They forecast that in 30 years we are going to have more than 150 million people suffering from this disease. PET/CT imaging can identify very early the typical patterns associated with all the different types of dementias, including Alzheimer's disease…”

For cardiac application, Prof Vangu said there are so many indications for PET/CT in cardiac imaging. One of the most important is the assessment of myocardial viability, in patients who have suffered from cardiomyopathy due to ischemic heart disease. PET/CT offers a noninvasive method of identifying viable myocardium that would benefit from revascularisation, with a very high diagnostic accuracy. 

Prof Vangu, who is also the head of nuclear medicine at the Charlotte Maxeke Johannesburg Academic and Chris Hani Baragwanath hospitals as well as head of the department for radiation sciences at the University of the Witwatersrand, said PET has been around for many years and is not something new. However, in clinical practice, PET imaging became significant with a breakthrough that occurred with the production of the glucose analogue tracer, 18F-fluorodeoxyglucose (FDG). This tracer in PET/CT imaging has revolutionised the management of cancer patients for the oncologist. It offers the ability of more accurate cancer staging, assessment of treatment response, assessment of disease recurrence and in some situations, surveillance. It has the ability to predict early which cancer patients will benefit from a particular drug, thereby giving the oncologist an idea on either to de-escalate treatment or change to a second line regimen very early on in the management. 

PET-CT scan imaging machine

An internet example of an image taken by a PET/CT machine. Photo for illustration: A PET/CT Imaging machine.


PET/CT came onto the market only in the year 2001, when it was launched for the first time by David Townsend (a physicist) and Ronald Nutt (electrical engineer). As at today, almost every institution in the country has at least one PET/CT machine.


“Looking at clinical applications, which is really the crux of the lecture today, there are so many clinical applications to talk about. You need a full week of a PET/CT symposium to go through all of them (and) maybe that might not even be enough. We can at least from this talk have an idea on how PET/CT can be applied in clinical medicine,” said Prof Vangu.

No other road for the university but to get a PET/CT machine

He also showed the impact and results that PET/CT imaging had in the management of infection and inflammation including TB. He said the role of PET/CT in TB is for monitoring of treatment, identification of extrapulmonary TB and prognosis. 

In concluding his lecture, he said there is no other road for the university but to get a PET/CT machine. “There is no argument about it. The institution needs it to improve the management of patients, especially the oncology and cardiology patients. Confidently making the decision on which patients to treat, how to treat them, identifying and evaluating their true response to therapy requires a PET/CT machine.

“I am happy to hear that the policy- and decisions-makers in the province and the university are looking forward to having a PET/CT machine,” he said later. 

Dr Osayande Evbuomwan, nuclear medicine specialist and Senior Lecturer, and Dr Gerrit Engelbrecht, Clinical Head of the Department of Nuclear Medicine at the UFS, are both looking forward of having a PET/CT in the department because in addition to its use in clinical setting, it has a huge role to play in research and training postgraduate students, as PET/CT imaging makes up a huge chunk of the postgraduate training curriculum

News Archive

“Every journey begins with the first steps” – Marguerite van der Merwe
2016-07-08

Description: Marguerite van der Merwe Tags: Marguerite van der Merwe

Marguerite van der Merwe, recipient of University of the
Free State Chancellor’s Medal, with Chancellor
Dr Khotso Mokhele, at the Winter Graduation ceremony.

Photo: Johan Roux

Marguerite van der Merwe has dedicated her life to the enrichment and increased quality of life for others. At the University of the Free State’s Winter Graduations on 30 June 2016, Van der Merwe and her brother, Anthony Douglas Osler, were both honoured with Chancellor’s Medals for exceptional service to South Africa and the world beyond our borders. In the early 1980s, she learned about the Alexander Technique and her life since then has been about perfecting the technique and sharing it with others. The Alexander Technique teaches people of any age, gender, occupation or interest, how to be posture-aware and perfect, how to be aware and alert, and how to be calm and discriminating, all of which are part of a practical teaching to integrate these qualities consciously into all our daily human activities.  

She walks the walk

She understood the Alexander Technique to be the perfect way to develop the body both physically and mentally, as it develops the higher mental faculties like focus, attention, awareness, consciousness, discrimination, and unfolding of the psyche, thus developing the human potential holistically as a spiritual way of being. She received her training for the technique in Cape Town and London, thereafter she published The Art of Walking, a guide to the Alexander Technique.

Van der Merwe is an internationally-certified teacher of the Alexander Technique, has been offering this work and its application in the spheres of health, education, and performance skills for 30 years, both nationally and internationally.

Van der Merwe says that the South African higher education system should encompass a holistic approach to teaching and educating. Education should envisage a modern vision of education that supports the evolution of the potential of the human being as a holistic system – a competent, skilled, caring, kind individual, developed in physical, mental, emotional and sensorial aspects. She believes that students thus educated will model ‘wholeness’ and ‘humanness’ as they take their place in society, business, education, and entrepreneurship.

Enriching women’s potential

Apart from The Art of Walking, Van der Merwe published EVE-OLUTION, a book to inspire women to listen to their intuition, and empower women to repossess their bodily wisdom, freedom, and authenticity. Van der Merwe proclaims that it is important to liberate women to take charge of their own bodies, minds, and souls. The purpose of the book is to ensure that young women soak up wisdom and encouragement and for older women to express their wisdom, which needs to be respected and listened to.

“Females and feminine roles in society and family are being liberated and acknowledged in the actions of many women as we stand for equal opportunity, equal power, and equality in many fields,” says Van der Merwe.
“Our young women in business and the higher education fraternity, for one, are strong in their views, beautiful in their presence, outspoken in leadership,” Van der Merwe concluded.

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