Search Results - "Herk, Marcel van"

Frameless Stereotactic Body Radiotherapy for Lung Cancer Using Four-Dimensional Cone Beam CT Guidance by Sonke, Jan-Jakob, Ph.D, Rossi, Maddalena, R.T.T, Wolthaus, Jochem, M.Sc, van Herk, Marcel, Ph.D, Damen, Eugene, Ph.D, Belderbos, Jose, M.D., Ph.D

“…Purpose To quantify the localization accuracy and intrafraction stability of lung cancer patients treated with frameless, four-dimensional (4D) cone beam…”
Get full text

Acute Toxicity After Image-Guided Intensity Modulated Radiation Therapy Compared to 3D Conformal Radiation Therapy in Prostate Cancer Patients by Wortel, Ruud C., MD, Incrocci, Luca, MD, PhD, Pos, Floris J., MD, PhD, Lebesque, Joos V., MD, PhD, Witte, Marnix G., PhD, van der Heide, Uulke A., PhD, van Herk, Marcel, PhD, Heemsbergen, Wilma D., PhD

“…Purpose Image-guided intensity modulated radiation therapy (IG-IMRT) allows significant dose reductions to organs at risk in prostate cancer patients. However,…”
Get full text

Variability of Four-Dimensional Computed Tomography Patient Models by Sonke, Jan-Jakob, Ph.D, Lebesque, Joos, Ph.D., M.D, van Herk, Marcel, Ph.D

“…Purpose To quantify the interfractional variability in lung tumor trajectory and mean position during the course of radiation therapy. Methods and Materials…”
Get full text

Respiratory correlated cone beam CT by Sonke, Jan-Jakob, Zijp, Lambert, Remeijer, Peter, van Herk, Marcel

“…A cone beam computed tomography (CBCT) scanner integrated with a linear accelerator is a powerful tool for image guided radiotherapy. Respiratory motion,…”
Get full text

Setup Uncertainties of Anatomical Sub-Regions in Head-and-Neck Cancer Patients After Offline CBCT Guidance by van Kranen, Simon, M.Sc, van Beek, Suzanne, R.T.T, Rasch, Coen, M D., Ph.D, van Herk, Marcel, Ph.D, Sonke, Jan-Jakob, Ph.D

“…Purpose To quantify local geometrical uncertainties in anatomical sub-regions during radiotherapy for head-and-neck cancer patients. Methods and Materials…”
Get full text

Deformable Image Registration for Adaptive Radiation Therapy of Head and Neck Cancer: Accuracy and Precision in the Presence of Tumor Changes by Mencarelli, Angelo, MSc, van Kranen, Simon Robert, MSc, Hamming-Vrieze, Olga, MD, van Beek, Suzanne, MSc, Nico Rasch, Coenraad Robert, PhD, MD, van Herk, Marcel, PhD, Sonke, Jan-Jakob, PhD

“…Purpose To compare deformable image registration (DIR) accuracy and precision for normal and tumor tissues in head and neck cancer patients during the course…”
Get full text

Comparison of Different Strategies to Use Four-Dimensional Computed Tomography in Treatment Planning for Lung Cancer Patients by Wolthaus, Jochem W.H., M.Sc, Sonke, Jan-Jakob, Ph.D, van Herk, Marcel, Ph.D, Belderbos, José S.A., M.D., Ph.D, Rossi, Maddalena M.G., D.C.R. (R.), R.T.T, Lebesque, Joos V., M.D., Ph.D, Damen, Eugène M.F., Ph.D

“…Purpose To discuss planning target volumes (PTVs) based on internal target volume (PTVITV ), exhale-gated radiotherapy (PTVGating ), and a new proposed…”
Get full text

Quantification of the Variability of Diaphragm Motion and Implications for Treatment Margin Construction by Rit, Simon, Ph.D, van Herk, Marcel, Ph.D, Zijp, Lambert, B.Sc, Sonke, Jan-Jakob, Ph.D

“…Purpose To quantify the variability of diaphragm motion during free-breathing radiotherapy of lung patients and its effect on treatment margins to account for…”
Get full text

A simple backprojection algorithm for 3D in vivo EPID dosimetry of IMRT treatments by Wendling, Markus, McDermott, Leah N., Mans, Anton, Sonke, Jan-Jakob, van Herk, Marcel, Mijnheer, Ben J.

“…Treatment plans are usually designed, optimized, and evaluated based on the total 3D dose distribution, motivating a total 3D dose verification. The purpose of…”
Get full text

Urinary Obstruction in Prostate Cancer Patients From the Dutch Trial (68 Gy vs. 78 Gy): Relationships With Local Dose, Acute Effects, and Baseline Characteristics by Heemsbergen, Wilma D., Ph.D, Al-Mamgani, Abrahim, M.D, Witte, Marnix G., Ph.D, van Herk, Marcel, Ph.D, Pos, Floris J., M.D., Ph.D, Lebesque, Joos V., M.D., Ph.D

“…Purpose To investigate the relationship between late urinary obstruction and the details of the dose distribution of irradiated prostate cancer patients,…”
Get full text

Effects of Setup Errors and Shape Changes on Breast Radiotherapy by van Mourik, Anke, Ph.D, van Kranen, Simon, M.Sc, den Hollander, Suzanne, M.Sc, Sonke, Jan-Jakob, Ph.D, van Herk, Marcel, Ph.D, van Vliet-Vroegindeweij, Corine, Ph.D

“…Purpose The purpose of the present study was to quantify the robustness of the dose distributions from three whole-breast radiotherapy (RT) techniques…”
Get full text

Regional analysis of volumes and reproducibilities of automatic and manual hippocampal segmentations by Bartel, Fabian, Vrenken, Hugo, Bijma, Fetsje, Barkhof, Frederik, van Herk, Marcel, de Munck, Jan C

“…Precise and reproducible hippocampus outlining is important to quantify hippocampal atrophy caused by neurodegenerative diseases and to spare the hippocampus…”
Get full text

Mid-ventilation CT scan construction from four-dimensional respiration-correlated CT scans for radiotherapy planning of lung cancer patients by Wolthaus, Jochem W H, Schneider, Christoph, Sonke, Jan-Jakob, van Herk, Marcel, Belderbos, José S A, Rossi, Maddalena M G, Lebesque, Joos V, Damen, Eugène M F

“…Four-dimensional (4D) respiration-correlated imaging techniques can be used to obtain (respiration) artifact-free computed tomography (CT) images of the…”
Get more information

A fast algorithm for gamma evaluation in 3D by Wendling, Markus, Zijp, Lambert J., McDermott, Leah N., Smit, Ewoud J., Sonke, Jan-Jakob, Mijnheer, Ben J., van Herk, Marcel

“…The γ -evaluation method is a tool by which dose distributions can be compared in a quantitative manner combining dose-difference and distance-to-agreement…”
Get full text

Acute Esophagus Toxicity in Lung Cancer Patients After Intensity Modulated Radiation Therapy and Concurrent Chemotherapy by Kwint, Margriet, MSc, Uyterlinde, Wilma, MSc, Nijkamp, Jasper, PhD, Chen, Chun, PhD, de Bois, Josien, RTT, Sonke, Jan-Jakob, PhD, van den Heuvel, Michel, MD, PhD, Knegjens, Joost, MD, van Herk, Marcel, PhD, Prof. Dr, Belderbos, José, MD, PhD

“…Purpose The purpose of this study was to investigate the dose-effect relation between acute esophageal toxicity (AET) and the dose-volume parameters of the…”
Get full text

Evaluating principal component analysis models for representing anatomical changes in head and neck radiotherapy by Argota-Perez, Raul, Robbins, Jennifer, Green, Andrew, Herk, Marcel van, Korreman, Stine, Vásquez-Osorio, Eliana

“…Anatomical changes during radiotherapy pose a challenge to robustness of plans. Principal component analysis (PCA) is commonly used to model such changes. We…”
Get full text

Accurate two-dimensional IMRT verification using a back-projection EPID dosimetry method by Wendling, Markus, Louwe, Robert J. W., McDermott, Leah N., Sonke, Jan-Jakob, van Herk, Marcel, Mijnheer, Ben J.

“…The use of electronic portal imaging devices (EPIDs) is a promising method for the dosimetric verification of external beam, megavoltage radiation therapy—both…”
Get full text

Kilo-Voltage Cone-Beam Computed Tomography Setup Measurements for Lung Cancer Patients; First Clinical Results and Comparison With Electronic Portal-Imaging Device by Borst, Gerben R., M.D, Sonke, Jan-Jakob, Ph.D, Betgen, Anja, R.T.T, Remeijer, Peter, Ph.D, van Herk, Marcel, Ph.D, Lebesque, Joos V., M.D., Ph.D

“…Purpose: Kilovoltage cone-beam computed tomography (CBCT) has been developed to provide accurate soft-tissue and bony setup information. We evaluated clinical…”
Get full text

Dynamic Collimator Angle Adjustments During Volumetric Modulated Arc Therapy to Account for Prostate Rotations by de Boer, Johan, MSc, Wolf, Anne Lisa, PhD, Szeto, Yenny Z., MSc, van Herk, Marcel, PhD, Sonke, Jan-Jakob, PhD

“…Purpose Rotations of the prostate gland induce considerable geometric uncertainties in prostate cancer radiation therapy. Collimator and gantry angle…”
Get full text

The Influence of a Dietary Protocol on Cone Beam CT–Guided Radiotherapy for Prostate Cancer Patients by Smitsmans, Monique H.P., M.Sc, Pos, Floris J., M.D., Ph.D, de Bois, Josien, R.T.T, Heemsbergen, Wilma D., Ph.D, Sonke, Jan-Jakob, Ph.D, Lebesque, Joos V., M.D., Ph.D, van Herk, Marcel, Ph.D

“…Purpose To evaluate the influence of a dietary protocol on cone beam computed tomography (CBCT) image quality, which is an indirect indicator for short-term…”
Get full text