Search Results - "Hanson, Ian M."

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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Machine QA for the Elekta Unity system: A Report from the Elekta MR‐linac consortium by Roberts, David A., Sandin, Carlos, Vesanen, Panu T., Lee, Hannah, Hanson, Ian M., Nill, Simeon, Perik, Thijs, Lim, Seng Boh, Vedam, Sastry, Yang, Jinzhong, Woodings, Simon W., Wolthaus, Jochem W. H., Keller, Brian, Budgell, Geoff, Chen, Xinfeng, Li, X. Allen

“…Over the last few years, magnetic resonance image‐guided radiotherapy systems have been introduced into the clinic, allowing for daily online plan adaption…”
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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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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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Investigating the effect of a magnetic field on dose distributions at phantom-air interfaces using PRESAGE ® 3D dosimeter and Monte Carlo simulations by Costa, Filipa, Doran, Simon J, Hanson, Ian M, Nill, Simeon, Billas, Ilias, Shipley, David, Duane, Simon, Adamovics, John, Oelfke, Uwe

“…Dosimetric quality assurance (QA) of the new Elekta Unity (MR-linac) will differ from the QA performed of a conventional linac due to the constant magnetic…”
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Portal dosimetry for VMAT using integrated images obtained during treatment by Bedford, James L., Hanson, Ian M., Hansen, Vibeke Nordmark

“…Purpose: Portal dosimetry provides an accurate and convenient means of verifying dose delivered to the patient. A simple method for carrying out portal…”
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Clinical implementation and rapid commissioning of an EPID based in-vivo dosimetry system by Hanson, Ian M, Hansen, Vibeke N, Olaciregui-Ruiz, Igor, van Herk, Marcel

“…Using an Electronic Portal Imaging Device (EPID) to perform in-vivo dosimetry is one of the most effective and efficient methods of verifying the safe delivery…”
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Quality of treatment plans and accuracy of in vivo portal dosimetry in hybrid intensity-modulated radiation therapy and volumetric modulated arc therapy for prostate cancer by Bedford, James L, Smyth, Gregory, Hanson, Ian M, Tree, Alison C, Dearnaley, David P, Hansen, Vibeke N

“…Abstract Background and purpose Delivering selected parts of volumetric modulated arc therapy (VMAT) plans using step-and-shoot intensity modulated…”
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Multi-Scale Modelling of the Bound Metal Deposition Manufacturing of Ti6Al4V by Luchinsky, Dmitry G., Hafiychuck, Vasyl, Wheeler, Kevin R., Biswas, Sudipta, Roberts, Christopher E., Hanson, Ian M., Prater, Tracie J., McClintock, Peter V. E.

“…Nonlinear shrinkage of the metal part during manufacturing by bound metal deposition, both on the ground and under microgravity, is considered. A multi-scale…”
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[OA151] Error sensitivity of forward- and back-projection EPID dosimetry for VMAT treatment of the prostate by Bedford, James L., Hanson, Ian M., Hansen, Vibeke N.

“…Volumetric modulated arc therapy (VMAT) treatments may be verified dosimetrically using an electronic portal imaging device (EPID), either using the…”
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Portal dosimetry for VMAT using integrated images obtained during treatment by Bedford, James L., Hanson, Ian M., Hansen, Vibeke Nordmark

“…Purpose: Portal dosimetry provides an accurate and convenient means of verifying dose delivered to the patient. A simple method for carrying out portal…”
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