Frederik De Keyzer

Robert Hermans4
Vincent Vandecaveye4
Harriet C Thoeny3
4Robert Hermans
4Vincent Vandecaveye
3Harriet C Thoeny
Learn More
OBJECTIVE To evaluate 3 Tesla (T) whole-body diffusion-weighted magnetic resonance imaging (WB DWI) for early treatment assessment in aggressive non-Hodgkin lymphoma (NHL). METHODS Fourteen patients with NHL treated with standard chemotherapy underwent 3-T WB DWI before and 2 and 4 weeks during treatment, using b-values of 0-1000 s/mm(2) from which the(More)
PURPOSE To determine how the ADC value of parotid glands is influenced by the choice of b-values. MATERIALS AND METHODS In eight healthy volunteers, diffusion-weighted echo-planar imaging (DW-EPI) was performed on a 1.5 T system, with b-values (in seconds/mm2) of 0, 50, 100, 150, 200, 250, 300, 500, 750, and 1000. ADC values were calculated by two(More)
PURPOSE To evaluate the function of the parotid glands before and during gustatory stimulation, using an intrinsic susceptibility-weighted MRI method (blood oxygenation level dependent, BOLD-MRI) at 1.5T and 3T. MATERIALS AND METHODS A total of 10 and 13 volunteers were investigated at 1.5T and 3T, respectively. Measurements were performed before and(More)
Technologic advances enable performance of diffusion-weighted imaging (DWI) at ultrahigh b-values, where standard monoexponential model analysis may not apply. Rather, non-Gaussian water diffusion properties emerge, which in cellular tissues are, in part, influenced by the intracellular environment that is not well evaluated by conventional DWI. The novel(More)
PURPOSE In head and neck cancer, diffusion weighted MRI (DWI) can predict response early during treatment. Treatment-induced changes and DWI-specific artifacts hinder an accurate registration between apparent diffusion coefficient (ADC) maps. The aim of the study was to develop a registration tool which calculates and visualizes regional changes in ADC. (More)
INTRODUCTION To examine the feasibility and results of calculating the volume of lumbar vertebral bodies in normal patients and patients with suspected hypoplasia of L5. METHODS Lumbar multi-detector CT was performed in 38 patients with bilateral spondylolysis and hypoplasia of L5 and in 38 normal patients. Lumbar vertebral body volume of L3, L4 and L5(More)
In patients with head and neck squamous cell carcinoma (SCC), nodal metastases are an adverse prognostic factor compromising long term patient survival. Therefore, accurate detection of regional nodal metastases is required for optimization of treatment. Computed tomography (CT) and magnetic resonance imaging (MRI) remain the primary imaging modalities for(More)
  • J F Griffith, A T Ahuja, A C W Chan, E Ng, S F Leung, C N Ng +60 others
  • 2004
Objectives: To determine (a) the relationship between primary oesophageal or stomach tumour location, tumour histology and the prevalence of metastatic neck nodes and (b) the effect metastatic neck node detection has on tumour staging. Patients and methods: Imaging and histological features of 308 patients with oesophageal cancer and 229 patients with(More)
  • 1