A computational tool for the efficient analysis of dose-volume histograms from radiation therapy treatment plans.

abstract：:The study purpose was to develop and validate a quality assurance test for CT automatic exposure control (AEC) systems based on a set of nested polymethylmethacrylate CTDI phantoms. The test phantom was created by offsetting the 16 cm head phantom within the 32 cm body annulus, thus creating a three part phantom. This...

journal_title：Journal of applied clinical medical physics

authors： Iball GR,Moore AC,Crawford EJ

更新日期：2016-07-08 00:00:00

abstract：:Radiographic film dosimetry provides fast, convenient 2-D dose distributions, but is challenged by the dependence of film response on scatter conditions (i.e., energy dependence). Verification of delivered dose in the surface buildup region is important for intensity modulated radiation therapy (IMRT) when volumes of ...

journal_title：Journal of applied clinical medical physics

authors： Roberson PL,Moran JM,Kulasekere R

更新日期：2008-10-24 00:00:00

abstract：:The dosimetry of very small electron fields can be challenging due to relative shifts in percent depth-dose curves, including the location of dmax, and lack of lateral electronic equilibrium in an ion chamber when placed in the beam. Conventionally a small parallel plate chamber or film is utilized to perform small fi...

journal_title：Journal of applied clinical medical physics

authors： Amin MN,Heaton R,Norrlinger B,Islam MK

更新日期：2010-10-04 00:00:00

abstract：:Highly attenuating radiation treatment couches are no longer useful in the present era of radiotherapy utilizing IMRT and IGRT. Carbon fibers couch tops with its high tensile strength and low density present a useful alternative. The objective of the current study was to quantify the attenuation of megavoltage photons...

journal_title：Journal of applied clinical medical physics

authors： Njeh CF,Raines TW,Saunders MW

更新日期：2009-06-02 00:00:00

abstract：PURPOSE:The purpose of this study was to optimize intra-voxel incoherent motion (IVIM) measurement in diffusion-weighted imaging (DWI) of breast cancer by separating perfusion and diffusion effects through the determination of an optimal threshold b-value, thus benign and cancerous breast tissues can be accurately diff...

journal_title：Journal of applied clinical medical physics

authors： Chen W,Zhang J,Long D,Wang Z,Zhu JM

更新日期：2017-05-01 00:00:00

abstract：:True 3D CT dataset for treatment planning of an oversized patient is difficult to acquire due to the bore size and field of view (FOV) reconstruction. This project aims to provide a simple approach to reconstruct true CT data for oversize patients using CT scanner with limited FOV by acquiring double partial CT (left ...

journal_title：Journal of applied clinical medical physics

authors： Wu H,Zhao Q,Cao M,Das I

更新日期：2012-03-08 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：PURPOSE:We introduce an automated, quantitative image analysis package for gamma camera and single photon emission computed tomography quality control. Our focus was to produce consistent methods that are feasible in clinical settings and use standard phantoms. METHODS:Four gamma cameras were used to acquire planar im...

journal_title：Journal of applied clinical medical physics

authors： Tazegul TE,Polemi AM,Snyder A,Snyder C,Collins PG

更新日期：2020-11-03 00:00:00

abstract：:Substantial disagreement exists over appropriate PET segmentation techniques for non-small cell lung cancer. Currently, no segmentation algorithm explicitly considers tumor motion in determining tumor borders. We developed an automatic PET segmentation model as a function of target volume, motion extent, and source-to...

journal_title：Journal of applied clinical medical physics

authors： Riegel AC,Bucci MK,Mawlawi OR,Ahmad M,Luo D,Chandler A,Pan T

更新日期：2014-01-06 00:00:00

abstract：:This work introduces a new technology for electron intensity modulation, which uses small area island blocks within the collimating aperture and small area island apertures in the collimating insert. Due to multiple Coulomb scattering, electrons contribute dose under island blocks and lateral to island apertures. By s...

journal_title：Journal of applied clinical medical physics

authors： Hogstrom KR,Carver RL,Chambers EL,Erhart K

更新日期：2017-11-01 00:00:00

abstract：:Monte Carlo (MC)-based dose calculations are generally superior to analytical dose calculations (ADC) in modeling the dose distribution for proton pencil beam scanning (PBS) treatments. The purpose of this paper is to present a methodology for commissioning and validating an accurate MC code for PBS utilizing a parame...

journal_title：Journal of applied clinical medical physics

authors： Huang S,Kang M,Souris K,Ainsley C,Solberg TD,McDonough JE,Simone CB 2nd,Lin L

更新日期：2018-09-01 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：:This study details the generation, verification, and implementation of a treatment planning system (TPS) couch top model for patient support system used in conjunction with a dedicated stereotactic linear accelerator. Couch top model was created within the TPS using CT simulation images of the kVue Calpyso-compatible ...

journal_title：Journal of applied clinical medical physics

authors： Gardner SJ,Gulam M,Song K,Li H,Huang Y,Zhao B,Qin Y,Snyder K,Kim J,Gordon J,Chetty IJ,Wen N

更新日期：2015-07-08 00:00:00

abstract：:The purpose of this work is to evaluate the volumetric-modulated arc therapy (VMAT) multicriteria optimization (MCO) algorithm clinically available in the RayStation treatment planning system (TPS) and its ability to reduce treatment planning time while providing high dosimetric plan quality. Nine patients with locali...

journal_title：Journal of applied clinical medical physics

authors： Ghandour S,Matzinger O,Pachoud M

更新日期：2015-05-08 00:00:00

abstract：BACKGROUND:We study the changes in organs-at-risk (OARs) morphology as contoured on serial MRIs during chemoradiation therapy (CRT) of glioblastoma (GBM). The dosimetric implication of assuming non-deformable OAR changes and the accuracy and feasibility of semi-automatic OAR contour propagation are investigated. METHO...

journal_title：Journal of applied clinical medical physics

authors： Lee S,Stewart J,Lee Y,Myrehaug S,Sahgal A,Ruschin M,Tseng CL

更新日期：2019-12-01 00:00:00

abstract：:The case of a 50-year-old man affected by a rhabdomiosarcoma metastatic lesion in the left flank Is reported. The patient was addressed to 50.4 Gy radiotherapy with concomitant chemotherapy in order to locally control the lesion. A Tri-60-Co magnetic resonance hybrid radiotherapy unit was used for treatment delivery a...

journal_title：Journal of applied clinical medical physics

authors： Massaccesi M,Cusumano D,Boldrini L,Dinapoli N,Fionda B,Teodoli S,Azario L,Mattiucci GC,Balducci M,Cellini F,Valentini V

更新日期：2019-06-01 00:00:00

abstract：PURPOSE:To evaluate the quality of patient-specific complicated treatment plans, including commercialized treatment planning systems (TPS) and commissioned beam data, we developed a process of quality assurance (QA) using a Monte Carlo (MC) platform. Specifically, we constructed an interface system that automatically c...

journal_title：Journal of applied clinical medical physics

authors： Lee B,Jeong S,Chung K,Yoon M,Park HC,Han Y,Jung SH

更新日期：2019-10-01 00:00:00

abstract：:A custom-made computer program, SWIMRT, to construct "multileaf collimator (MLC) machine" file for intensity-modulated radiotherapy (IMRT) fluence maps was developed using MATLAB and the sliding window algorithm. The user can either import a fluence map with a graphical file format created by an external treatment-pla...

journal_title：Journal of applied clinical medical physics

authors： Chow JC,Grigorov GN,Yazdani N

更新日期：2006-05-25 00:00:00

abstract：:The purpose of this study was to evaluate the dose differences introduced by the TMR 10 and the convolution dose calculation algorithms in GammaPlan version 10, as compared to the TMR classic algorithm in the previous versions of GammaPlan. Computed axial tomographic images of a polystyrene phantom and a human head we...

journal_title：Journal of applied clinical medical physics

authors： Xu AY,Bhatnagar J,Bednarz G,Niranjan A,Flickinger J,Lunsford LD,Huq MS

更新日期：2014-09-08 00:00:00

abstract：:High dose rate (HDR) brachytherapy often involves optimization routines to calculate the dwell times and positions of a radioactive source along specified applicator paths. These routines optimize the dwells in such a way as to deliver the prescribed dose at one or more points while satisfying various constraints. The...

journal_title：Journal of applied clinical medical physics

authors： Lachaine ME,Gorman JC,Palisca MG

更新日期：2003-04-01 00:00:00

abstract：:Special attention is required in planning and administering radiation therapy to patients with cardiac implantable electronic devices (CIEDs), such as pacemaker and defibrillator. The range of dose to CIEDs that can induce malfunction is large among CIEDs. Clinically significant defects have been reported at dose as l...

journal_title：Journal of applied clinical medical physics

authors： Yan H,Guo F,Zhu D,Stryker S,Trumpore S,Roberts K,Higgins S,Nath R,Chen Z,Liu W

更新日期：2018-01-01 00:00:00

abstract：PURPOSE:Previous studies suggest that within radiation oncology, medical physicists (MP) experience high workloads. Little is known about how MPs use social support (SS) in times of stress. METHODS:In collaboration with the Workgroup on Prevention of Medical Error, the American Association of Physicists in Medicine ad...

journal_title：Journal of applied clinical medical physics

authors： Johnson J,Ford E,Yu J,Buckey C,Fogh S,Evans SB

更新日期：2019-09-01 00:00:00

abstract：:We have investigated the combined effect of tissue heterogeneity and its variation associated with geometric error in stereotactic body radiotherapy (SBRT) for lung cancer. The treatment plans for eight lung cancer patients were calculated using effective path length (EPL) correction and Monte Carlo (MC) algorithms, w...

journal_title：Journal of applied clinical medical physics

authors： Kang KM,Jeong BK,Choi HS,Yoo SH,Hwang UJ,Lim YK,Jeong H

更新日期：2015-09-08 00:00:00

abstract：:Our institution performs in vivo verification measurement for each of our total body irradiation (TBI) patients with optically stimulated luminescent dosimeters (OSLD). The lung block verification measurements were commonly higher than expected. The aim of this work is to understand this discrepancy and improve the ac...

journal_title：Journal of applied clinical medical physics

authors： Narayanasamy G,Cruz W,Saenz DL,Stathakis S,Papanikolaou N,Kirby N

更新日期：2016-05-08 00:00:00

abstract：:In order to locate lung tumors on kV projection images without internal markers, digitally reconstructed radiographs (DRRs) are created and compared with projection images. However, lung tumors always move due to respiration and their locations change on projection images while they are static on DRRs. In addition, gl...

journal_title：Journal of applied clinical medical physics

authors： Rozario T,Bereg S,Yan Y,Chiu T,Liu H,Kearney V,Jiang L,Mao W

更新日期：2015-05-08 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：BACKGROUND:We analyzed the clinical and imaging characteristics of patients with breast ductal carcinoma in situ with microinvasion (DCISM) and breast ductal carcinoma in situ (DCIS). METHODS:We analyzed the records of 40 patients diagnosed with DCISM and 61 patients with DCIS who were hospitalized at Shengjing Hospit...

journal_title：Journal of applied clinical medical physics

authors： Han S,Qiu F,Han Y,Xu Y,Yin J,Xing F,Bian X,He G

更新日期：2020-12-17 00:00:00

abstract：:This is a proof-of-concept study demonstrating the capacity for modulated electron radiation therapy (MERT) dose distributions using 3D printed bolus. Previous reports have involved bolus design using an electron pencil beam model and fabrication using a milling machine. In this study, an in-house algorithm is present...

journal_title：Journal of applied clinical medical physics

authors： Su S,Moran K,Robar JL

更新日期：2014-07-08 00:00:00

abstract：:This study investigates the dosimetry and radiobiological model variation when a second photon arc was added to prostate volumetric-modulated arc therapy (VMAT) using the single-arc technique. Dosimetry and radiobiological model comparison between the single-arc and double-arc prostate VMAT plans were performed on fiv...

journal_title：Journal of applied clinical medical physics

authors： Chow JC,Jiang R

更新日期：2013-05-06 00:00:00

abstract：BACKGROUND AND PURPOSE:Along with the increasing demand for high-quality radiotherapy and the growing number of high-precision radiotherapy devices, precise radiotherapy workflow management and accurate time evaluation of the entire radiotherapy process are crucial to providing appropriate, timely treatment for cancer ...

journal_title：Journal of applied clinical medical physics

authors： Guo C,Huang P,Li Y,Dai J

更新日期：2020-09-01 00:00:00