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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

Guidelines for diminishing the possible impact of power interruptions on academic activities at the UFS
2008-01-31

The Executive Management of the UFS resolved to attempt to manage the possible impact of power interruptions on teaching and learning proactively. Our greatest challenge is to adapt to what we cannot control at present and, as far as possible, refrain from compromising the quality of teaching and learning at the UFS.

First the following realities are important:

  • There is no clarity regarding the period of disruption. It is possible that it may last for a few months to approximately five years.
  • At present Eskom (as well as Centlec) is not giving any guarantees that the scheduled interruptions will be adhered to. It comes down to this that the power supply may be interrupted without notice, but can also be switched back on in an unpredictable manner.
  • Certain scheduled teaching-learning activities/classes, etc. may (initially) be affected very negatively, as the UFS is working according to a scheduled weekly module timetable at present.
  • During the day certain venues with natural lighting and ventilation may remain suitable for contact sessions, while towards evening venues will no longer be suitable for the presentation of classes.
  • Lecturers will have to fall back on tried and tested presentation methods not linked to electricity, without neglecting innovative technology-linked presentation methods, or will have to schedule alternative teaching-learning activities for lost teaching-learning time.

Against the background of the above-mentioned realities, we secondly request you to comply with the following guidelines as far as possible:

  1.  In addition to your module work programme, develop an alternative programme (which can, for example, among others, consist of additional lectures or a more rapid work rate) in which provision is made for a loss of at least two weeks’ class/contact time during the semester. Consult Centlec’s schedule of foreseen power interruptions for this planning.
  2. Should it appear that your class(es) will probably be disrupted seriously by the scheduled power interruptions, you should contact your dean for possible rescheduling of your timeslot and a supplementary timetable. A prescheduled supplementary timetable for Friday afternoons and Saturdays and/or other suitable times will be compiled for this purpose in co-operation with faculties.
  3. The principle of equivalent educational treatment of day and evening lectures must be maintained at all times. Great sensitivity must be shown by, for instance, not only rescheduling the lectures of evening students - given specifically the sensitivity regarding language and the distribution of day and evening lectures.
  4. In the case of full-time undergraduate courses, no lectures should be cancelled beforehand, even when a power interruption is announced, as power interruptions sometimes do not take place or are of shorter duration than announced. If the power supply is interrupted, it should not be accepted that it will remain off and that subsequent lectures will not take place. Should a power interruption occur in a venue, lecturers and students must wait for at least ten minutes before the lecture is cancelled. Should natural lighting and ventilation make it possible to continue with the lecture, it should be done.
  5. Our point of departure is that no student must be able to use the power interruptions and non-presentation/cancellation of lectures as an argument for having failed modules, for poor academic performance or to negotiate for a change of examination scheduling.

Thirdly we wish to make suggestions regarding teaching and learning strategies (which can be especially useful in case of a power interruption).

  • Emphasise a greater measure of self-activity (self-initiative) on the part of students in this unpredictable environment right from the start.
  • Also emphasise the completion of assessment assignments in good time, so that students cannot use power interruptions as an excuse for late submission. Flexibility will, however, have to be maintained.
  • Place your PowerPoint presentations and any other supplementary learning materials on the web.
  • Use the opportunity to stimulate buzz groups, group work, panel discussions and peer evaluation.

Please also feel free to consult Dr Saretha Brussow, Head: Teaching, Learning and Assessment Division at the Centre for Higher Education Studies and Development, about alternative teaching, learning and assessment strategies. Phone extension x2448 or send an email to sbrussow.rd@ufs.ac.za .

Thank you for your friendly co-operation!

Prof. D. Hay
 

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