Christina Leitzen

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BACKGROUND AND PURPOSE Diffusion weighted imaging (DWI) as a functional MR technique allows for both qualitative and quantitative assessment of tumour cellularity and changes during therapy. The objective of this study was to evaluate changes of apparent diffusion coefficient (ADC) in biopsy proven prostate cancer (PCa) under intensity modulated(More)
PURPOSE determine the value of MR studies in patients undergoing radiotherapy for glioblastomas pre and during radiotherapy to predict the clinical course. PATIENTS AND METHODS MR follow-up studies were performed in 33 patients with glioblastomas before radiotherapy, after 30 Gy, after 60 Gy, and in the treatment follow-up. Findings on MR were categorized(More)
OBJECTIVE Taste dysfunction is a common side effect during irradiation of head and neck. Our aim was to determine the time-dependent course and a possible dependency of this side effect to the radiation-dose during irradiation with helical tomotherapy. PATIENTS AND METHODS 31 patients with malignant tumours in the region of head and neck received an(More)
OBJECTIVE Optimization of a specially developed automatic microaspirator for fine-needle aspiration of suspicious thyroid nodules. PATIENTS, METHOD In a preliminary test biopsy effectiveness was evaluated in 20 native resected thyroid glands in vitro with both a Cameco® gun and a specially designed microaspirator respectively. In addition in both(More)
BACKGROUND We observed visual sensations (VSs) in patients undergoing intensity modulated radiotherapy (IMRT) of the brain without the beam passing through ocular structures. We analyzed this phenomenon especially with regards to reproducibility, and origin. METHODS AND FINDINGS Analyzed were ten consecutive patients (aged 41-71 years) with glioblastoma(More)
BACKGROUND AND PURPOSE Patient immobilization during brain tumor radiotherapy is achieved by employing different mask systems. Two innovative mask systems were developed to minimize the problems of claustrophobic patients. Our aim was to evaluate whether the quality of patient immobilization using the new mask systems was equivalent to the standard mask(More)
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