Mariza Vorster

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OBJECTIVES We sought to determine whether taking oral erythromycin prior to SPECT myocardial perfusion imaging with Tc99m-sestamibi would reduce the amount of interfering extra-cardiac activity and improve the image quality. METHODS A total of 96 patients who were routinely referred for myocardial perfusion imaging were randomly assigned to one of two(More)
The giant radio galaxy M 87 with its proximity (16 Mpc), famous jet, and very massive black hole ((3 − 6) × 10 9 M) provides a unique opportunity to investigate the origin of very high energy (VHE; E>100 GeV) γ-ray emission generated in relativistic outflows and the surroundings of super-massive black holes. M 87 has been established as a VHE γ-ray emitter(More)
Introduction: A 37-year-old man was referred for PET/CT with the following diagnostic challenge: a longstanding smoking history, histologically confirmed TB and sarcoidosis with worsening chest-related symptoms and a non-responsive right upper lobe lung lesion (as detected on CT). Materials and Methods: PET/CT imaging was performed with 18 F-FDG and(More)
Prostate-specific membrane antigen (PSMA), a type II glycoprotein, is highly expressed in almost all prostate cancers. By playing such a universal role in the disease, PSMA provides a target for diagnostic imaging of prostate cancer using positron emission tomography/computed tomography (PET/CT). The PSMA-targeting ligand Glu-NH-CO-NH-Lys-(Ahx)-HBED-CC(More)
Single-photon emission computed tomography-computed tomography (SPECT-CT) allows for physiological and anatomical co-registration in sentinel lymph node (SLN) mapping and offers additional benefits over conventional planar imaging. However, the clinical relevance when considering added costs and radiation burden of these reported benefits remains somewhat(More)
An annihilation signal of dark matter is searched for from the central region of the Milky Way. Data acquired in dedicated on-off observations of the Galactic center region with H.E.S.S. are analyzed for this purpose. No significant signal is found in a total of ∼9  h of on-off observations. Upper limits on the velocity averaged cross section, ⟨σv⟩, for the(More)
Introduction: Spinal tuberculosis is a serious health care problem and diagnosis is often difficult because many diseases may have similar imaging findings. Hence the need to describe findings of spinal tuberculosis with 2-[fluorine 18]fluoro-2-deoxy-D-glucose (FDG) positron emission tomography (PET) when compared to CT. Materials and Methods: Sixteen(More)
Bladder artifact during bone single-photon emission computed tomography (SPECT) is a common source of error. The extent and severity of bladder artifacts have been described for filtered back projection (FBP) reconstruction. Ordered subset expectation maximization (OSEM) may help to address this problem of bladder artifacts, which render up to 20% of the(More)
Background: Survival with anaplastic thyroid cancer is dependent on how rapid multimodality treatment (chemotherapy, radiotherapy and surgery) and thus accurate assessment of the extent of the disease critical to predict prognosis and therapy planning. Methods & Results: We present a case of anaplastic cancer in a 54-year-old woman who presented with a(More)
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