Search Results - "Bedford, James L"

Treatment planning for volumetric modulated arc therapy by Bedford, James L.

“…Purpose : Volumetric modulated arc therapy (VMAT) is a specific type of intensity-modulated radiation therapy (IMRT) in which the gantry speed, multileaf…”
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Recent developments in non-coplanar radiotherapy by Smyth, Gregory, Evans, Philip M, Bamber, Jeffrey C, Bedford, James L

“…This paper gives an overview of recent developments in non-coplanar intensity modulated radiotherapy (IMRT) and volumetric modulated arc therapy (VMAT). Modern…”
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Commissioning of Volumetric Modulated Arc Therapy (VMAT) by Bedford, James L., Ph.D, Warrington, Alan P., M.Sc

“…Purpose Volumetric modulated arc therapy (VMAT) involves the simultaneous use of dynamic multileaf collimator (DMLC) techniques and gantry arcing; appropriate…”
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Comparison of forward- and back-projection in vivo EPID dosimetry for VMAT treatment of the prostate by Bedford, James L, Hanson, Ian M, Hansen, Vibeke N

“…In the forward-projection method of portal dosimetry for volumetric modulated arc therapy (VMAT), the integrated signal at the electronic portal imaging device…”
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Dynamic tumor tracking using the Elekta Agility MLC by Fast, Martin F., Nill, Simeon, Bedford, James L., Oelfke, Uwe

“…Purpose: To evaluate the performance of the Elekta Agility multileaf collimator (MLC) for dynamic real‐time tumor tracking. Methods: The authors have developed…”
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Functional lung avoidance in radiotherapy using optimisation of biologically effective dose with non-coplanar beam orientations by Bedford, James L, Ahmed, Merina

“…In external beam radiotherapy for non-small cell lung cancer, dose to functioning lung should be minimised to reduce lung morbidity. This study aimed to…”
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Trajectory optimization for dynamic couch rotation during volumetric modulated arc radiotherapy by Smyth, Gregory, Bamber, Jeffrey C, Evans, Philip M, Bedford, James L

“…Non-coplanar radiation beams are often used in three-dimensional conformal and intensity modulated radiotherapy to reduce dose to organs at risk (OAR) by…”
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A recurrent neural network for rapid detection of delivery errors during real-time portal dosimetry by Bedford, James L., Hanson, Ian M.

“…•Real-time portal dosimetry can detect errors in volumetric modulated arc therapy.•Neural networks avoid false positive errors during intrafraction portal…”
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Effect of MLC tracking latency on conformal volumetric modulated arc therapy (VMAT) plans in 4D stereotactic lung treatment by Bedford, James L, Fast, Martin F, Nill, Simeon, McDonald, Fiona M.A, Ahmed, Merina, Hansen, Vibeke N, Oelfke, Uwe

“…Abstract Background and purpose The latency of a multileaf collimator (MLC) tracking system used to overcome respiratory motion causes misalignment of the…”
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Development and Evaluation of Multiple Isocentric Volumetric Modulated Arc Therapy Technique for Craniospinal Axis Radiotherapy Planning by Lee, Young K., Ph.D, Brooks, Corrinne J., B.Sc, Bedford, James L., Ph.D, Warrington, Alan P., M.Sc, Saran, Frank H., M.D., F.R.C.R

“…Purpose To develop and compare a volumetric modulated arc therapy (VMAT) technique with conventional radiotherapy for craniospinal irradiation with respect to…”
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Calculation of absorbed dose in radiotherapy by solution of the linear Boltzmann transport equations by Bedford, James L

“…Over the last decade, dose calculations which solve the linear Boltzmann transport equations have been introduced into clinical practice and are now in…”
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Helical Volumetric Modulated Arc Therapy for Treatment of Craniospinal Axis by Bedford, James L., Ph.D, Lee, Young K., Ph.D, Saran, Frank H., M.D., F.R.C.R, Warrington, Alan P., M.Sc

“…Purpose Volumetric modulated arc therapy (VMAT) can be used with multiple isocenters to provide an effective treatment of the craniospinal axis. Additional…”
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Comparison of inverse-planned three-dimensional conformal radiotherapy and intensity-modulated radiotherapy for non–small-cell lung cancer by Christian, Judith A., M.R.C.P., F.R.C.R., M.D, Bedford, James L., Ph.D, Webb, Steve, D.Sc., Ph.D, Brada, Michael, F.R.C.R., F.R.C.P

“…Purpose: Lungs are the major dose-limiting organ during radiotherapy (RT) for non–small-cell lung cancer owing to the development of pneumonitis. This study…”
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Dosimetric accuracy of delivering SBRT using dynamic arcs on Cyberknife by Bedford, James L., Nill, Simeon, Oelfke, Uwe

“…Purpose Several studies have demonstrated potential improvements in treatment time through the use of dynamic arcs for delivery of stereotactic body radiation…”
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Effective avoidance of a functional spect-perfused lung using intensity modulated radiotherapy (IMRT) for non-small cell lung cancer (NSCLC): An update of a planning study by Lavrenkov, Konstantin, Singh, Shalini, Christian, Judith A, Partridge, Mike, Nioutsikou, Elena, Cook, Gary, Bedford, James L, Brada, Michael

“…Abstract IMRT and 3-dimensional conformal radiotherapy (3-DCRT) plans of 25 patients with non-small cell lung (NSCLC) were compared in terms of planning target…”
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Treatment of lung cancer using volumetric modulated arc therapy and image guidance: a case study by Bedford, James L, Nordmark Hansen, Vibeke, McNair, Helen A, Aitken, Alexandra H, Brock, Juliet E C, Warrington, Alan P, Brada, Michael

“…Volumetric modulated arc therapy (VMAT) is a radiotherapy technique in which the gantry rotates while the beam is on. Gantry speed, multileaf collimator (MLC)…”
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Treatment planning optimization with beam motion modeling for dynamic arc delivery of SBRT using Cyberknife with multileaf collimation by Bedford, James L., Tsang, Henry S., Nill, Simeon, Oelfke, Uwe

“…Purpose The use of dynamic arcs for delivery of stereotactic body radiation therapy (SBRT) on Cyberknife is investigated, with a view to improving treatment…”
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Optimisation of a composite difference metric for prompt error detection in real-time portal dosimetry of simulated volumetric modulated arc therapy by Bedford, James L, Hanson, Ian M

“…In real-time portal dosimetry, thresholds are set for several measures of difference between predicted and measured images, and signals larger than those…”
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A method to verify sections of arc during intrafraction portal dosimetry for prostate VMAT by Bedford, James L, Hanson, Ian M

“…This study investigates the use of a running sum of images during segment-resolved intrafraction portal dosimetry for volumetric modulated arc therapy (VMAT),…”
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Sinogram analysis of aperture optimization by iterative least-squares in volumetric modulated arc therapy by Bedford, James L

“…Iterative least-squares (ILS) has been used in CT image reconstruction for many years and has also been successfully applied to fluence optimization in…”
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