Volumetric-modulated arc therapy planning using multicriteria optimization for localized prostate cancer.

abstract：:The purpose of this study was to determine the reproducibility of patient-specific, intensity-modulated radiation therapy (IMRT) quality assurance (QA) results in a clinical setting. Six clinical patient plans were delivered to a variety of devices and analyses, including 1) radiographic film; 2) ion chamber; 3) 2D di...

journal_title：Journal of applied clinical medical physics

authors： McKenzie EM,Balter PA,Stingo FC,Jones J,Followill DS,Kry SF

更新日期：2014-05-08 00:00:00

abstract：PURPOSE:Prescription practice in SRS plans for brain tumors differs significantly for different modalities. In this retrospective study, the strategies to optimize SRS plans for brain tumors with volumetric arc therapy (VMAT) were presented. METHODS:Fifty clinically treated cases were stratified by the maximum target ...

journal_title：Journal of applied clinical medical physics

authors： Wang D,DeNittis A,Hu Y

更新日期：2020-03-01 00:00:00

abstract：:We describe a method for independently verifying the dose distributions from pre- and post-implant brachytherapy source distributions. Monte Carlo calculations have been performed to characterize the three-dimensional dose distribution in water phantom from a low-energy brachytherapy source. The calculations are perfo...

journal_title：Journal of applied clinical medical physics

authors： DeMarco JJ,Solberg TD,Agazaryan N

更新日期：2003-01-01 00:00:00

abstract：:Documentation is a required component of a residency program, but can be difficult to collect and disseminate, resulting in minimal utilization by residents and faculty. The purpose of this work is to adapt a commercially-available Web-based medical residency management system to improve the learning experience by eff...

journal_title：Journal of applied clinical medical physics

authors： Schubert LK,Miften M

更新日期：2014-11-08 00:00:00

abstract：:This study aimed to verify the accuracy of half-value layer (HVL) measured using the new copper pipe method with the CT ionization chamber while the X-ray tube is rotating and to compare it with the conventional nonrotating method and Monte Carlo simulation method based on the actual measurement and geometry of the ne...

journal_title：Journal of applied clinical medical physics

authors： Okubo R,Matsubara K,Chusin T,Hibino T,Ito Y

更新日期：2019-12-01 00:00:00

abstract：:This study evaluated the extent of improvement in dose predication accuracy achieved by the Fast Monte Carlo algorithm (MC) compared to the Ray Tracing algorithm (RAT) in stereotactic body radiotherapy (SBRT) of non-small cell lung cancer (NSCLC), and how their differences were influenced by the tumor site and size. T...

journal_title：Journal of applied clinical medical physics

authors： Wu VW,Tam KW,Tong SM

更新日期：2013-09-06 00:00:00

abstract：:Physical and dosimetric characteristics of HDMLC were studied for SRS6, 6, and 10 MV X-rays from Novalis Tx. This in-built tertiary collimator consists of 60 pairs (32 × 0.25 cm; 26 × 0.5 cm and 2 × 0.7 cm) of leaves. Properties of HDMLC studied included alignment, readout and radiation field congruence, radiation pen...

journal_title：Journal of applied clinical medical physics

authors： Sharma DS,Dongre PM,Mhatre V,Heigrujam M

更新日期：2011-04-14 00:00:00

abstract：:This work illustrates a procedure to assess the overall accuracy associated with Gamma Knife treatment planning using plugging. The main role of source plugging or blocking is to create dose falloff in the junction between a target and a critical structure. We report the use of MAGAT gel dosimeter for verification of ...

journal_title：Journal of applied clinical medical physics

authors： Natanasabapathi G,Subbiah V,Kale SS,Rath GK,Senthilkumaran S,Thulkar S,Subramani V,Laviraj MA,Bisht RK,Mahapatra AK

更新日期：2012-11-08 00:00:00

abstract：:Multileaf collimator (MLC) tracking represents a promising technique for motion management in radiotherapy. However, the conflict between limited leaf speed/acceleration and the demand for tracking fast target motion is now a prominent issue. Conventional MLCs typically have a maximum leaf speed of 3-4 cm/s and a maxi...

journal_title：Journal of applied clinical medical physics

authors： Zhang X,Ye P,Zhang H

更新日期：2017-01-01 00:00:00

abstract：:This study evaluated unexpected dosimetric errors caused by machine control accuracy, patient setup errors, and patient weight changes/internal organ deformations. Trajectory log files for 13 gynecologic plans with seven- or nine-beam dynamic multileaf collimator (MLC) intensity-modulated radiation therapy (IMRT), and...

journal_title：Journal of applied clinical medical physics

authors： Utena Y,Takatsu J,Sugimoto S,Sasai K

更新日期：2021-01-10 00:00:00

abstract：PURPOSE/OBJECTIVES:To present our linac-based SRS procedural technique for medically and/or surgically refractory trigeminal neuralgia (TN) treatment and simultaneously report our clinical outcomes. MATERIALS AND METHODS:Twenty-seven refractory TN patients who were treated with a single fraction of 80 Gy to TN. Treatm...

journal_title：Journal of applied clinical medical physics

authors： Pokhrel D,Sood S,McClinton C,Saleh H,Badkul R,Jiang H,Stepp T,Camarata P,Wang F

更新日期：2017-03-01 00:00:00

abstract：:The purpose of this study was to assess treatment margins in free-breathing irradiation of pancreatic cancer after bone alignment, and evaluate their impact on conformal radiotherapy. Fifteen patients with adenocarcinoma of the head of the pancreas underwent implantation of single fiducial marker. Intrafraction uncert...

journal_title：Journal of applied clinical medical physics

authors： Solla I,Zucca S,Possanzini M,Piras S,Pusceddu C,Porru S,Meleddu G,Farace P

更新日期：2013-07-08 00:00:00

abstract：:The image-guided radiotherapy technique (IGRT) makes use of imaging devices to verify the positions of the target volume and organs at risk during the treatment sessions. In this work we evaluate the image quality provided by an imaging system based on a kilovoltage cone-beam CT, and explore its ability to perform IGR...

journal_title：Journal of applied clinical medical physics

authors： Garayoa J,Castro P

更新日期：2013-01-07 00:00:00

abstract：:Intraoperative electron radiation therapy (IOERT) cannot usually benefit, as conventional external radiotherapy, from software systems of treatment planning based on computed tomography and from common dose verify procedures. For this reason, in vivo film dosimetry (IVFD) proves to be an effective methodology to evalu...

journal_title：Journal of applied clinical medical physics

authors： Severgnini M,de Denaro M,Bortul M,Vidali C,Beorchia A

更新日期：2014-01-08 00:00:00

abstract：PURPOSE:Segmentation of liver organ and tumors from computed tomography (CT) scans is an important task for hepatic surgical planning. Manual segmentation of liver and tumors is tedious, time-consuming, and biased to the clinician experience. Therefore, automatic segmentation of liver and tumors is highly desirable. It...

journal_title：Journal of applied clinical medical physics

authors： Alirr OI

更新日期：2020-10-01 00:00:00

abstract：:The necessity to build or adapt radiotherapy rooms in reduced areas leads to the search for unconventional solutions for shielding projects. In most cases, adding metals to the primary barriers is the best alternative to shield rooms properly. However, when photons with energies equal or higher than 10 MV interact wit...

journal_title：Journal of applied clinical medical physics

authors： Rezende GF,Da Rosa LA,Facure A

更新日期：2014-11-08 00:00:00

abstract：:The primary study objective was to assess radiation doses using a modified form of the Imaging Performance Assessment of Computed Tomography (CT) scanner (ImPACT) patient dosimetry for cardiac applications on an Aquilion ONE ViSION Edition scanner, including the Ca score, target computed tomography angiography (CTA), ...

journal_title：Journal of applied clinical medical physics

authors： Kobayashi M,Asada Y,Matsubara K,Suzuki S,Koshida K,Matsunaga Y,Haba T,Kawaguchi A,Toyama H,Kato R

更新日期：2016-07-08 00:00:00

abstract：PURPOSE:To determine the optimal dose-volume constraint for laryngeal sparing using three commonly employed intensity modulated radiation therapy (IMRT) approaches in patients with oropharyngeal cancer treated to the bilateral neck. MATERIALS AND METHODS:Thirty patients with stage II-IVA oropharynx cancers received de...

journal_title：Journal of applied clinical medical physics

authors： Wilke C,Takiar V,Wang H,Moreno AC,Tung SS,Quinlan-Davidson SR,Garden AS,Rosenthal DI,Fuller CD,Gunn GB,Reddy JP,Morrison WH,Wang C,Zhao G,Hutcheson KA,Phan J

更新日期：2020-12-05 00:00:00

abstract：:The purpose of this study was to develop and validate cardiac computed tomog-raphy (CT) quantitative analysis software with a patient-specific, 17-segment myocardial model that uses electrocardiogram (ECG)-gated cardiac CT images to differentiate between normal controls and severe aortic stenosis (AS) patients. ECG-ga...

journal_title：Journal of applied clinical medical physics

authors： Jung J,Kim YH,Kim N,Yang DH

更新日期：2016-09-08 00:00:00

abstract：:A method to evaluate the electron beam energy constancy by employing the computed radiography (CR) system has been developed. In this method, a right triangular plastic wedge is used to produce a curve of the CR storage phosphor plate signal versus the wedge thickness. The curve, which resembles the percentage depth i...

journal_title：Journal of applied clinical medical physics

authors： Cai YC,Ge Y,Bernard D,Turian J,Chu JCH

更新日期：2009-10-15 00:00:00

abstract：:We report our technique for hemibody skin electron irradiation with a custom-made plywood shield. The technique is similar to our clinical total skin electron irradiation (TSEI), performed with a six-pair dual field (Stanford technique) at an extended source-to-skin distance (SSD) of 377 cm, with the addition of a ply...

journal_title：Journal of applied clinical medical physics

authors： Rivers CI,AlDahlawi I,Wang IZ,Singh AK,Podgorsak MB

更新日期：2016-11-08 00:00:00

abstract：:The American Association of Physicists in Medicine (AAPM) is a nonprofit professional society whose primary purposes are to advance the science, education and professional practice of medical physics. The AAPM has more than 8,000 members and is the principal organization of medical physicists in the United States. The...

journal_title：Journal of applied clinical medical physics

authors： Smilowitz JB,Das IJ,Feygelman V,Fraass BA,Kry SF,Marshall IR,Mihailidis DN,Ouhib Z,Ritter T,Snyder MG,Fairobent L,AAPM Medical Physics Practice Guideline Task Group.

更新日期：2015-09-08 00:00:00

abstract：:Independent treatment planning system (TPS) check with Mobius3D software, log files based quality assurance (QA) with MobiusFX, and phantom measurement-based QA with ArcCHECK were performed and cross verified for head-and-neck (17 patients), chest (16 patients), and abdominal (19 patients) cancer patients who underwen...

journal_title：Journal of applied clinical medical physics

authors： Han C,Yi J,Zhu K,Zhou Y,Ai Y,Zheng X,Xie C,Jin X

更新日期：2020-10-01 00:00:00

abstract：:Magnetic Resonance Imaging (MRI) is increasingly being used for improving tumor delineation and tumor tracking in the presence of respiratory motion. The purpose of this work is to design and build an MR compatible motion platform and to use it for evaluating the geometric accuracy of MR imaging techniques during resp...

journal_title：Journal of applied clinical medical physics

authors： Torfeh T,Hammoud R,El Kaissi T,McGarry M,Aouadi S,Fayad H,Al-Hammadi N

更新日期：2018-03-01 00:00:00

abstract：PURPOSE:Volumetric modulated arc therapy (VMAT) is gaining popularity for stereotactic treatment of lung lesions for medically inoperable patients. Due to multiple beamlets in delivery of highly modulated VMAT plans, there are dose delivery uncertainties associated with small-field dosimetry error and interplay effects...

journal_title：Journal of applied clinical medical physics

authors： Pokhrel D,Visak J,Sanford L

更新日期：2020-07-01 00:00:00

abstract：:The purpose of this study was to demonstrate that Monte Carlo treatment planning systems require tissue characterization (density and composition) as a function of CT number. A discrete set of tissue classes with a specific composition is introduced. In the current work we demonstrate that, for megavoltage photon radi...

journal_title：Journal of applied clinical medical physics

authors： Demol B,Viard R,Reynaert N

更新日期：2015-09-08 00:00:00

abstract：PURPOSE:To investigate the effect of the marker placement on the correlation relationship between the motions of external markers and the internal target under different breathing patterns for several lung cancer patients. METHOD AND MATERIAL:To monitor and record simultaneous motions of internal target and associated...

journal_title：Journal of applied clinical medical physics

authors： Yan H,Zhu G,Yang J,Lu M,Ajlouni M,Kim JH,Yin FF

更新日期：2008-04-16 00:00:00

abstract：:The objectives of this project are to quantify the dose reduction effect provided by a lead shield for patients with cardiac implantable electronic devices (CIED) during a clinically realistic radiation treatment on phantom and to provide a simple model of dose estimation to predict dose received by CIED in a wide ran...

journal_title：Journal of applied clinical medical physics

authors： Bourgouin A,Varfalvy N,Archambault L

更新日期：2015-11-08 00:00:00

abstract：:A spreadsheet-based model for economically characterizing the operation of a radiation treatment program has been used to perform a quantitative financial analysis of scheduled and unscheduled downtime. The incremental cost of downtime is broken down into three categories: remuneration of in-house or third party servi...

journal_title：Journal of applied clinical medical physics

authors： Dunscombe P,Roberts G,Valiquette L

更新日期：2000-04-01 00:00:00

abstract：PURPOSE:The purpose of this study was to introduce a new algorithm for automated measurement of the modulation transfer function (MTF) using an edge of a readily available phantom and to evaluate the effect of reconstruction filter and field of view (FOV) on the spatial resolution in the CT images. METHODS:Our automat...

journal_title：Journal of applied clinical medical physics

authors： Anam C,Fujibuchi T,Budi WS,Haryanto F,Dougherty G

更新日期：2018-11-01 00:00:00