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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

Socially inclusive teaching provides solution to Grade 4 literacy challenges
2017-01-23

 Description: Motselisi Malebese Tags: Motselisi Malebese

Mots’elisi Malebese, postdoctoral Fellow of the Faculty
of Education at the University of the Free State (UFS) tackles
Grade 4 literacy challenges.
Photo: Rulanzen Martin

Imagine a teaching approach that inculcates richness of culture and knowledge to individual learners, thus enhancing equity, equality, social justice, freedom, hope and fairness in terms of learning opportunities for all, regardless of learners’ diversity.

This teaching strategy was introduced by Mots’elisi Malebese, postdoctoral Fellow of the Faculty of Education at the University of the Free State (UFS), whose thesis focuses on bringing together different skills, knowledge and expertise in a classroom environment in order to enhance learners’ competence in literacy.

A teaching approach to aid Grade 4 literacy competency
Titled, A Socially Inclusive Teaching Strategy to Respond to Problems of Literacy in a Grade 4 Class, Malebese’s post-doctoral research refers to an approach that improves listening, speaking, reading, writing, technical functioning and critical thinking. Malebese, who obtained her PhD qualification in June this year, says her research confirmed that, currently, Grade 4 is a bottleneck stage, at which learners from a low socio-economic background fall behind in their learning due to the transition from being taught in their home language to English as a medium of instruction.

Malebese, says: “My study, therefore, required practical intervention through participatory action research (PAR) to create conditions that foster space for empowerment.”

PAR indoctrinates a democratic way of living that is equitable, liberating and life-enhancing, by breaking away from traditional teaching methods. It involves forming coalitions with individuals with the least social, cultural and economic power.

Malebese’s thesis was encouraged by previous research that revealed that a lack of readiness for a transitional phase among learners, teachers’ inability to teach literacy efficiently, and poor parental involvement, caused many learners to experience a wide variety of learning barriers.

A co-teaching model was adopted in an effort to create a more socially inclusive classroom. This model involves one teacher providing every learner with the assistance he or she needs to succeed, while another teacher moves around the room and provides assistance to individual learners.

“Learners’ needs are served best by allowing them to demonstrate understanding in a variety of ways, because knowledge is conveyed and accomplished through collaborative work,” Malebese said.

She believes the most important benefit of this model is assuring that learners become teachers of their understanding and experiences through gained knowledge.

Roleplayers get involved using diverse expertise in their field
Teachers, parents and several NGOs played a vital role in Malebese’s study by getting involved in training, sewing and cooking clubs every weekend and during school holidays. English was the medium of teaching and learning in every activity. A lodge, close to the school, offered learners training in mountain biking and hiking. These activities helped learners become tour guides. Storyteller Gcina Mhlophe presented learners with a gift of her latest recorded storytelling CD and books. Every day after school, learners would read, and have drama lessons once a week.

AfriGrow, an organisation that works with communities, the government and the corporate sector to develop sustainable community-driven livelihoods through agricultural and nutrition programmes, provided learners with seedlings, manure and other garden inputs and training on how to start a sustainable food garden. The children were also encouraged to participate in sporting activities like soccer and netball.

“I was aware that I needed a large toolbox of instructional strategies, and had to involve other stakeholders with diverse expertise in their field,” Malebese said.

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