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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

Academics should strive to work with students towards publishing, says NRF-rated researcher
2017-07-17

Description: Dr Rodwell Makombe Tags: National Research Foundation University of the Free State Qwaqwa Campus Department of English  

Dr Rodwell Makombe, Y-gegradeerde navorser.
Foto: Thabo Kessah


“The National Research Foundation (NRF) is a prestigious research institution and to be recognised by such an institution means that my work is worthwhile. This alone motivates me to do more research.” This is how Dr Rodwell Makombe reflected on his recent recognition as an NRF-rated researcher – one of the few on the Qwaqwa Campus. He is a Senior Lecturer in the Department of English at the University of the Free State’s Qwaqwa Campus.

“This recognition is indeed an important milestone in my research career. It means that my efforts as a researcher are recognised and appreciated. The financial research incentive will enable me to engage in more research, attend conferences, and so forth,” he said.

Comparing research in the Humanities and Sciences

Dr Makombe’s research area is broadly postcolonial African literature, but he is particularly interested in postcolonial literatures and resistance cultures. He is currently working on a book project entitled Visual Cultures of the Afromontane.

When asked what he thought about Natural Sciences being in the lead as far as research is concerned, he said that this is mainly caused by funding opportunities.

“It means that my efforts as a
researcher are recognised and
appreciated.”

“It is easier to access funding for research in the Natural Sciences than for the Humanities. Researchers in the Humanities usually do research without any form of funding. However, there are also differences in the way research is done in the Sciences than in the Humanities. Science researchers tend to work together on different projects, which make it easier for them to have their names on publications, no matter how small their contribution. This is also connected to the issue of funding,” he added. 

He continued: “Since research in the Humanities is largely unfunded, it is difficult for researchers to establish research groups. Another issue is that most academics in the Humanities do not necessarily teach modules within their research interests. Therefore, they tend to be overloaded with work as they have to do research in one area and teach in another area.”

NRF-rating and funding

For Dr Makombe, the solution to this challenge lies in academics in the Humanities working towards publishing with their students. “This way,” he said, “both the students and the academics will get publications that will help them to get NRF-rating and other forms of research funding. Modules in the Humanities need to be aligned to academics’ research interests to avoid mismatches between teaching and research.” 

He previously worked at the University of Fort Hare and the Durban University of Technology and has published several articles in both local and international journals.

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