Search Results - "Mohajer, Jonathan"

Automatic reconstruction of the delivered dose of the day using MR-linac treatment log files and online MR imaging by Menten, Martin J., Mohajer, Jonathan K., Nilawar, Rahul, Bertholet, Jenny, Dunlop, Alex, Pathmanathan, Angela U., Moreau, Michel, Marshall, Spencer, Wetscherek, Andreas, Nill, Simeon, Tree, Alison C., Oelfke, Uwe

“…•Novel dose reconstruction workflow based on log files and online MR imaging.•Intrafractional motion and dose changes were clinically meaningless in most…”
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Daily adaptive radiotherapy for patients with prostate cancer using a high field MR-linac: Initial clinical experiences and assessment of delivered doses compared to a C-arm linac by Dunlop, Alex, Mitchell, Adam, Tree, Alison, Barnes, Helen, Bower, Lorna, Chick, Joan, Goodwin, Edmund, Herbert, Trina, Lawes, Rebekah, McNair, Helen, McQuaid, Dualta, Mohajer, Jonathan, Nilawar, Rahul, Pathmanathan, Angela, Smith, Gillian, Hanson, Ian, Nill, Simeon, Oelfke, Uwe

“…•MR-guided radiotherapy for prostate cancer can be delivered using a high filed MR-linac.•Comparison of estimated delivered dose between MR-guided adapted…”
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Feasibility of MR-guided ultrahypofractionated radiotherapy in 5, 2 or 1 fractions for prostate cancer by Mohajer, Jonathan, Dunlop, Alex, Mitchell, Adam, Goodwin, Edmund, Nill, Simeon, Oelfke, Uwe, Tree, Alison

“…•Deliverable plans for 1 and 2 fraction SBRT can be created for the Unity MR-Linac.•Dose constraints and objectives from HDR and SBRT clinical studies were…”
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Developing and validating a simple urethra surrogate model to facilitate dosimetric analysis to predict genitourinary toxicity by Ratnakumaran, Ragu, Mohajer, Jonathan, Withey, Samuel J., H. Brand, Douglas, Lee, Ernest, Loblaw, Andrew, Tolan, Shaun, van As, Nicholas, Tree, Alison C.

“…•The urethra maybe an important organ-at-risk in prostate SBRT.•However, the urethra is invisible on CT planning scans.•We develop and validate a simple…”
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Bladder filling in patients undergoing prostate radiotherapy on a MR-linac: The dosimetric impact by Smith, Gillian Adair, Dunlop, Alex, Barnes, Helen, Herbert, Trina, Lawes, Rebekah, Mohajer, Jonathan, Tree, Alison C., McNair, Helen A.

“…•Patient compliance with bladder filling varies.•The majority of dose constraints can be achieved despite variations in bladder filling.•For patients on the…”
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Measurement and Incorporation of Laryngeal Motion Using cine-MRI on an MR-Linear Accelerator to Generate Radiation Therapy Plans for Early-stage Squamous Cell Cancers of the Glottis by Gupta, Amit, McQuaid, Dualta, Dunlop, Alex, Barnes, Helen, Mohajer, Jonathan, Smith, Gillian, Nartey, Jayde, Morrison, Kian, Herbert, Trina, Alexander, Sophie, McNair, Helen, Newbold, Kate, Nutting, Chris, Bhide, Shreerang, Harrington, Kevin Joseph, Wong, Kee Howe

“…Swallow-related motion of the larynx is most significant in the cranio-caudal directions and of` short duration. Conventional target definition for radical…”
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Biological effects of static magnetic field exposure in the context of MR-guided radiotherapy by Mohajer, Jonathan Kim, Nisbet, Andrew, Velliou, Eirini, Ajaz, Mazhar, Schettino, Giuseppe

“…The clinical introduction of MRI-guided radiotherapy has prompted consideration of the potential impact of the static magnetic field on biological responses to…”
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Dosimetric comparison of automatically propagated prostate contours with manually drawn contours in MRI-guided radiotherapy: A step towards a contouring free workflow? by Sritharan, Kobika, Dunlop, Alex, Mohajer, Jonathan, Adair-Smith, Gillian, Barnes, Helen, Brand, Douglas, Greenlay, Emily, Hijab, Adham, Oelfke, Uwe, Pathmanathan, Angela, Mitchell, Adam, Murray, Julia, Nill, Simeon, Parker, Chris, Sundahl, Nora, Tree, Alison C.

“…•The prostate demonstrates inter- and intra-fractional changes.•Adaptive radiotherapy can play an important role in treating prostate cancer.•Manual…”
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Interobserver variation of clinical oncologists compared to therapeutic radiographers (RTT) prostate contours on T2 weighted MRI by Adair Smith, Gillian, Dunlop, Alex, Alexander, Sophie E., Barnes, Helen, Casey, Francis, Chick, Joan, Gunapala, Ranga, Herbert, Trina, Lawes, Rebekah, Mason, Sarah A., Mitchell, Adam, Mohajer, Jonathan, Murray, Julia, Nill, Simeon, Patel, Priyanka, Pathmanathan, Angela, Sritharan, Kobika, Sundahl, Nora, Westley, Rosalyne, Tree, Alison C., McNair, Helen A.

“…•The majority of radiographers prostate and seminal vesicle contours are within a range of clinicians’ contours.•DSC of radiographer prostate and seminal…”
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Laser-free pelvic alignment in an online adaptive radiotherapy environment by Barnes, Helen, Mohajer, Jonathan, Dunlop, Alex, Adair Smith, Gillian, Herbert, Trina, Lawes, Rebekah, Tree, Alison, McNair, Helen

“…•The MR Linac is a novel laser-free online adaptive radiotherapy environment.•An audit of MR Linac pelvic set-up accuracy and time was conducted to establish a…”
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940: Implementing plan of the day for cervix cancer: which contouring method and margins to use by Wang, Lei, Mohajer, Jonathan, McNair, Helen, Harris, Emma, Lalondrelle, Susan

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Analysis of rectal dose during prostate stereotactic body radiotherapy in MR-guided radiotherapy by Sritharan, Kobika, Dunlop, Alex, Mitchell, Adam, Mohajer, Jonathan, Smith, Gillian, Tree, Alison

“…Abstract only 242 Background: The Unity MR-Linac combines a 7-MV Linac with 1.5T magnetic resonance (MR) imaging capability and it enables adaptive…”
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Implementing Plan of the Day for Cervical Cancer: A Comparison of Target Volume Generation Methods by Wang, Lei, Mohajer, Jonathan, McNair, Helen, Harris, Emma, Lalondrelle, Susan

“…Owing to substantial interfraction motion in cervical cancer, plan-of-the-day (PotD) adaptive radiation therapy may be of benefit to patients. Implementation…”
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2289: Initial Evaluation of Radiographer Target Volume Online Contouring for Bladder MRIgRT by Williams, Bethany, Mohajer, Jonathan, Alexander, Sophie, Barnes, Helen, Boodhoo, Shabanaz, Casey, Francis, Chick, Joan, Dunlop, Alex, Herbert, Trina, Huddart, Robert, Ingle, Manasi, Nartey, Jayde, Nill, Simeon, Patel, Priyanka, Smith, Gillian, Stankiewicz, Hubert, Hafeez, Shaista, McNair, Helen

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Evaluation of therapeutic radiographer contouring for magnetic resonance image guided online adaptive prostate radiotherapy by Adair Smith, Gillian, Dunlop, Alex, Alexander, Sophie E., Barnes, Helen, Casey, Francis, Chick, Joan, Gunapala, Ranga, Herbert, Trina, Lawes, Rebekah, Mason, Sarah A., Mitchell, Adam, Mohajer, Jonathan, Murray, Julia, Nill, Simeon, Patel, Priyanka, Pathmanathan, Angela, Sritharan, Kobika, Sundahl, Nora, Tree, Alison C., Westley, Rosalyne, Williams, Bethany, McNair, Helen A.

“…•Radiographer prostate contours are comparable to clinicians.•Prostate and organs at risk can be contoured online by radiographers.•Plans created from…”
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Development of Prostate Bed Delineation Consensus Guidelines for Magnetic Resonance Image-Guided Radiotherapy and Assessment of Its Effect on Interobserver Variability by Sritharan, Kobika, Akhiat, Hafid, Cahill, Declan, Choi, Seungtaek, Choudhury, Ananya, Chung, Peter, Diaz, Juan, Dysager, Lars, Hall, William, Huddart, Robert, Kerkmeijer, Linda G W, Lawton, Colleen, Mohajer, Jonathan, Murray, Julia, Nyborg, Christina J, Pos, Floris J, Rigo, Michele, Schytte, Tine, Sidhom, Mark, Sohaib, Aslam, Tan, Alex, van der Voort van Zyp, Jochem, Vesprini, Danny, Zelefsky, Michael J, Tree, Alison C

“…The use of magnetic resonance imaging (MRI) in radiotherapy planning is becoming more widespread, particularly with the emergence of MRI-guided radiotherapy…”
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