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YvesDeDeene's De Gersem:W [3 articles]

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	Clinical delivery of intensity modulated conformal radiotherapy for relapsed or second-primary head and neck cancer using a multileaf collimator with dynamic control Radiotherapy and Oncology, Vol. 50, No. 3. (1 March 1999), pp. 301-314. by Wilfried De Neve, Wezner De Gersem, Sylvie Derycke, et al.Gert De Meerleer, Mieke Moerman, Marie-Thélèse Bate, Bart Van Duyse, Luc Vakaet, Yves De Deene, Bart Mersseman, Carlos De Waeter posted to intensity modulated radiotherapy by YvesDeDeene on 2008-09-09 17:02:56 Abstract Copy My Attachments My Copy Abstract Background and purpose: Concave dose distributions generated by intensity modulated radiotherapy (IMRT) were applied to re-irradiate three patients with pharyngeal cancer. Patients, materials and methods: Conventional radiotherapy for oropharyngeal (patients 1 and 3) or nasopharyngeal (patient 2) cancers was followed by relapsing or new tumors in the nasopharynx (patients 1 and 2) and hypopharynx (patient 3). Six non-opposed coplanar intensity modulated beams were generated by combining non-modulated beamparts with intensities (weights) obtained by minimizing a biophysical objective function. Beamparts were delivered ...
	Validation of MR-based polymer gel dosimetry as a preclinical three-dimensional verification tool in conformal radiotherapy Magnetic Resonance in Medicine, Vol. 43, No. 1. (2000), pp. 116-125. by Y. De Deene, C. De Wagter, B. Van Duyse, et al.S. Derycke, B. Mersseman, W. De Gersem, T. Voet, E. Achten, W. De Neve posted to no-tag by YvesDeDeene on 2008-09-09 17:01:38 Abstract Copy My Attachments My Copy Abstract The aim of this work was to investigate MR-based polymer gel dosimetry as a three-dimensional (3D) dosimetry technique in conformal radiotherapy. A cylindrical container filled with polymer gel was placed in a water-filled torso phantom to verify a treatment plan for the conformal irradiation of a mediastinal tumor located near the esophagus. Magnetic resonance spin-spin relaxation rate images were acquired and, after calibration, converted to absorbed dose distributions. The dose maps were compared with dose distributions measured using radiographic film. The ...
	Application of monomer/polymer gel dosimetry to study the effects of tissue inhomogeneities on intensity-modulated radiation therapy (IMRT) dose distributions Radiotherapy and Oncology, Vol. 67, No. 1. (April 2003), pp. 119-128. by Koen Vergote, Yves De Deene, Filip Claus, et al.Werner De Gersem, Bart Van Duyse, Leen Paelinck, Eric Achten, Wilfried De Neve, Carlos De Wagter posted to dosimetry gel by YvesDeDeene on 2008-09-09 16:53:29 Abstract Copy My Attachments My Copy Abstract Background and purpose: When planning an intensity-modulated radiation therapy (IMRT) treatment in a heterogeneous region (e.g. the thorax), the dose computation algorithm of a treatment planning system may need to account for these inhomogeneities in order to obtain a reliable prediction of the dose distribution. An accurate dose verification technique such as monomer/polymer gel dosimetry is suggested to verify the outcome of the planning system. Materials and methods: The effects of low-density structures: (a) on narrow high-energy (18 MV) photon beams; ...

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