https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 The effect of the horizontal metallic drive on reference dosimetry in the SNC 3D scanner water tank https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39546 Wed 27 Jul 2022 14:27:52 AEST ]]> AAPM medical physics practice guideline 13.a: HDR brachytherapy, part A https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:50486 Wed 26 Jul 2023 19:04:21 AEST ]]> A novel quality assurance procedure for trajectory log validation using phantom-less real-time latency corrected EPID images https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46306 2 sliding window (SW) field moving at 2.5 cm/s orthogonal to the row readout direction. The latency of each panel type was determined by averaging the results of two panels of the same type. Geometric correction was achieved by computing leaf positions with respect to the projected isocenter position as a function of gantry angle. This was determined by averaging the central axis position of fields at two collimator positions of 90° and 270°. The radiological to physical leaf end position was determined by comparison of the measured gap with that determined using a feeler gauge. The radiological to physical leaf position difference was found to be 0.1 mm. With geometric and latency correction, the proposed method was found to be improve the ability to detect dynamic MLC positions from 1.0 to 0.2 mm for all leaves. Latency and panel residual geometric error correction improve EPID-based MLC position measurement. These improvements provide for the first time a trajectory log QA procedure.]]> Wed 15 May 2024 15:47:58 AEST ]]> Evaluation of the truebeam machine performance check (MPC): OBI X-ray tube alignment procedure https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36226 Wed 11 Mar 2020 11:50:42 AEDT ]]> A system for real-time monitoring of breath-hold via assessment of internal anatomy in tangential breast radiotherapy https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:45758 Wed 11 Jan 2023 10:15:35 AEDT ]]> Evaluation of the truebeam machine performance check (MPC): mechanical and collimation checks https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:31160 Wed 11 Apr 2018 17:08:02 AEST ]]> Isocenter verification for linac-based stereotactic radiation therapy: review of principles and techniques https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:16119 Wed 11 Apr 2018 17:07:42 AEST ]]> An investigation of gantry angle data accuracy for cine-mode EPID images acquired during arc IMRT https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:17095 Wed 11 Apr 2018 15:05:03 AEST ]]> Time-resolved beam symmetry measurement for VMAT commissioning and quality assurance https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:26075 Wed 11 Apr 2018 11:58:43 AEST ]]> Investigation on the performance of dedicated radiotherapy positioning devices for MR scanning for prostate planning https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:28129 3. The external body deformation caused a mean dose reduction of 0.6 ± 0.3 Gy, while the coverage reduced by 22% ± 13% and 27% ± 6% in V₉₈ and V₁₀₀, respectively. A dedicated MR simulation setup for prostate radiotherapy is essential to ensure the agreement between planning anatomy and treatment anatomy. The image signal was reduced after applying the coil mount, but no significant effect was found on prostate contouring.]]> Wed 11 Apr 2018 09:52:08 AEST ]]> Gantry angle determination during arc IMRT: evaluation of a simple EPID-based technique and two commercial inclinometers https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:17096 Wed 11 Apr 2018 09:43:42 AEST ]]> Technical note: TROG 15.01 SPARK trial multi-institutional imaging dose measurement https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:33853 Wed 04 Sep 2019 10:04:12 AEST ]]> Validation of virtual water phantom software for pre-treatment verification of single-isocenter multiple-target stereotactic radiosurgery https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:49000 Wed 03 May 2023 12:03:21 AEST ]]> Real-time intrafraction prostate motion during linac based stereotactic radiotherapy with rectal displacement https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:33946 Wed 02 Mar 2022 14:29:12 AEDT ]]> Non-contrast based approach for liver function quantification using Bayesian-based intravoxel incoherent motion diffusion weighted imaging: A pilot study https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:53472 Tue 28 Nov 2023 15:54:21 AEDT ]]> Predictive quality assurance of a linear accelerator based on the machine performance check application using statistical process control and ARIMA forecast modeling https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39845 Tue 19 Jul 2022 08:45:26 AEST ]]> Insensitivity of machine log files to MLC leaf backlash and effect of MLC backlash on clinical dynamic MLC motion: An experimental investigation https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:52542 Tue 17 Oct 2023 10:18:54 AEDT ]]> EPID-based dosimetry to verify IMRT planar dose distribution for the aS1200 EPID and FFF beams https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:29751 Tue 16 Mar 2021 10:50:28 AEDT ]]> An EPID-based system for gantry-resolved MLC quality assurance for VMAT https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:25773 Tue 16 Mar 2021 10:50:09 AEDT ]]> The dosimetric impact of control point spacing for sliding gap MLC fields https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:29466 Tue 16 Mar 2021 10:49:48 AEDT ]]> Impact of backscattered radiation from the bunker structure on EPID dosimetry https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:17097 Tue 04 Apr 2023 19:30:17 AEST ]]> Evaluation of the truebeam machine performance check (MPC) geometric checks for daily IGRT geometric accuracy quality assurance https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:34651 Tue 03 Sep 2019 18:31:40 AEST ]]> Evaluation of the TrueBeam machine performance check (MPC) beam constancy checks for flattened and flattening filter-free (FFF) photon beams https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:34557 Tue 03 Sep 2019 18:30:21 AEST ]]> Beam focal spot position: the forgotten linac QA parameter. An EPID-based phantomless method for routine Stereotactic linac QA https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:34143 Tue 03 Sep 2019 18:26:27 AEST ]]> A novel and independent method for time-resolved gantry angle quality assurance for VMAT https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:34236 Tue 03 Sep 2019 18:22:44 AEST ]]> A proposed method for linear accelerator photon beam steering using EPID https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:35008 Thu 30 May 2019 14:44:50 AEST ]]> An investigation of gantry angle data accuracy for cine-mode EPID images acquired during arc IMRT https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:19103 Thu 30 Jul 2015 09:51:11 AEST ]]> VMAT linear accelerator commissioning and quality assurance: dose control and gantry speed tests https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:27239 Thu 24 Sep 2020 12:32:14 AEST ]]> Remote dosimetric auditing of clinical trials: the need for vendor specific models to convert images to dose https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:37396 Thu 05 Nov 2020 10:18:02 AEDT ]]> Voxel-based supervised machine learning of peripheral zone prostate cancer using noncontrast multiparametric MRI https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:42724 Thu 01 Sep 2022 13:18:31 AEST ]]> Electron beam energy QA - a note on measurement tolerances https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:25823 Sat 24 Mar 2018 07:34:43 AEDT ]]> Determination of the electronic portal imaging device pixel-sensitivity-map for quality assurance applications. Part 1: Comparison of methods https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:51889 Fri 22 Sep 2023 09:22:44 AEST ]]> Determination of the electronic portal imaging device pixel-sensitivity-map for quality assurance applications. Part 2: Photon beam dependence https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:51888 Fri 22 Sep 2023 09:22:04 AEST ]]> A virtual audit system for intensity-modulated radiation therapy credentialing in Japan Clinical Oncology Group clinical trials: A pilot study https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:51080 Fri 18 Aug 2023 09:31:34 AEST ]]> Varian ethos online adaptive radiotherapy for prostate cancer: Early results of contouring accuracy, treatment plan quality, and treatment time https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:45741 Fri 04 Nov 2022 10:13:02 AEDT ]]>