Gantry angle determination during arc IMRT: evaluation of a simple EPID-based technique and two commercial inclinometers.

abstract：:A thermobrachytherapy surface applicator (TBSA) was developed for simultaneous heat and brachytherapy treatment of chest wall (CW) recurrence of breast cancer. The ability to comfortably secure the applicator over the upper torso relative to the CW target throughout treatment is assessed on volunteers. Male and postma...

journal_title：Journal of applied clinical medical physics

authors： Arunachalam K,Craciunescu OI,Markewitz EJ,Maccarini PF,Schlorff JL,Stauffer PR

更新日期：2012-09-06 00:00:00

abstract：:Peripheral lung lesions treated with a single fraction of stereotactic ablative body radiotherapy (SABR) utilizing volumetric modulated arc therapy (VMAT) delivery and flattening filter-free (FFF) beams represent a potentially high-risk scenario for clinically significant dose blurring effects due to interplay between...

journal_title：Journal of applied clinical medical physics

authors： Burton A,Offer K,Hardcastle N

更新日期：2020-08-01 00:00:00

abstract：:This study aims to evaluate the potential jaw-tracking advantage using control point sequences of volume volumetric modulated arc therapy (VMAT) planning. VMAT plans for patients with prostate and head and neck (H&N) cancers were converted into new static arc (SA) plans. The SA plan consisted of a series of static fie...

journal_title：Journal of applied clinical medical physics

authors： Kim JI,Park JM,Park SY,Choi CH,Wu HG,Ye SJ

更新日期：2014-03-06 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：:This study extends the 'zero scan' method for CT imaging of polymer gel dosimeters to include multislice acquisitions. Multislice CT images consisting of 24 slices of 1.2 mm thickness were acquired of an irradiated polymer gel dosimeter and processed with the zero scan technique. The results demonstrate that zero scan...

journal_title：Journal of applied clinical medical physics

authors： Kakakhel MB,Kairn T,Charles P,Trapp JV

更新日期：2014-07-08 00:00:00

abstract：:The purpose of this study was to investigate amplitude gating combined with a coached breathing strategy for 10 MV flattening filter-free (FFF) volumetric-modulated arc therapy (VMAT) on the Varian TrueBeam linac. Ten patient plans for VMAT SABR liver were created using the Eclipse treatment planning system (TPS). The...

journal_title：Journal of applied clinical medical physics

authors： Viel F,Lee R,Gete E,Duzenli C

更新日期：2015-07-08 00:00:00

abstract：:The purpose of this study is to simulate random and systematic RapidArc delivery errors for external beam prostate radiotherapy plans in order to determine the dose sensitivity for each error type. Ten prostate plans were created with a single 360° arc. The DICOM files for these treatment plans were then imported into...

journal_title：Journal of applied clinical medical physics

authors： Oliver M,Bush K,Zavgorodni S,Ansbacher W,Beckham WA

更新日期：2011-05-20 00:00:00

abstract：:In this project, we investigated the use of an electronic portal imaging device (EPID), together with the treatment planning system (TPS) and MLC log files, to determine the delivered doses to the patient and evaluate the agreement between the treatment plan and the delivered dose distribution. The QA analysis results...

journal_title：Journal of applied clinical medical physics

authors： Defoor DL,Vazquez-Quino LA,Mavroidis P,Papanikolaou N,Stathakis S

更新日期：2015-05-08 00:00:00

abstract：:The purpose was to assess the variability in automated translational head/neck setup corrections computed from several different imaging modalities and rigid registration methods using patient anatomy. Shifts were calculated using three commercial and one in-house automated rigid registration methods for nine head/nec...

journal_title：Journal of applied clinical medical physics

authors： Dogan N,Song S,Saleh H,Wu J,Murphy MJ

更新日期：2010-10-13 00:00:00

abstract：:The monochromatic images acquired by Gemstone spectral imaging (GSI) mode on the GE CT750 HD theoretically determines the computed tomography (CT) number more accurately than that of conventional scanner. Using the former, the CT number is calculated from (synthesized) monoenergetic X-ray data. We reasoned that the mo...

journal_title：Journal of applied clinical medical physics

authors： Yagi M,Ueguchi T,Koizumi M,Ogata T,Yamada S,Takahashi Y,Sumida I,Akino Y,Konishi K,Isohashi F,Tomiyama N,Yoshioka Y,Ogawa K

更新日期：2013-09-06 00:00:00

abstract：:While a few physicists have designed new plan check automation solutions for their clinics, fewer, if any, managed to adapt existing solutions. As complex and varied as the systems they check, these programs must gain the full confidence of those who would run them on countless patient plans. The present automation ef...

journal_title：Journal of applied clinical medical physics

authors： Halabi T,Lu HM

更新日期：2014-07-08 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：:Performing a procedure on the wrong patient or site is one of the greatest errors that can occur in medicine. The addition of automation has been shown to reduce errors in many processes. In this work we explore the use of an automated patient identification process using optical surface imaging for radiotherapy treat...

journal_title：Journal of applied clinical medical physics

authors： Wiant DB,Verchick Q,Gates P,Vanderstraeten CL,Maurer JM,Hayes TL,Liu H,Sintay BJ

更新日期：2016-03-08 00:00:00

abstract：:In radiation therapy, a secondary independent dose verification is an important component of a quality control system. Mobius3D calculates three-dimensional (3D) patient dose using reference beam data and a collapsed cone convolution algorithm and analyzes dose-volume histogram automatically. There are currently no pu...

journal_title：Journal of applied clinical medical physics

authors： Kodama T,Saito Y,Hatanaka S,Hariu M,Shimbo M,Takahashi T

更新日期：2019-05-01 00:00:00

abstract：INTRODUCTION:Aim of this study is to dosimetrically characterize a new inorganic scintillator designed for magnetic resonance-guided radiotherapy (MRgRT) in the presence of 0.35 tesla magnetic field (B). METHODS:The detector was characterized in terms of signal to noise ratio (SNR), reproducibility, dose linearity, an...

journal_title：Journal of applied clinical medical physics

authors： Cusumano D,Placidi L,D'Agostino E,Boldrini L,Menna S,Valentini V,De Spirito M,Azario L

更新日期：2020-09-01 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

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：:Significant controversy surrounds the 2012 / 2014 decision announced by the Trustees of the American Board of Radiology (ABR) in October of 2007. According to the ABR, only medical physicists who are graduates of a Commission on Accreditation of Medical Physics Education Programs, Inc. (CAMPEP) accredited academic or ...

journal_title：Journal of applied clinical medical physics

authors： Mills MD,Thornewill J,Esterhay RJ

更新日期：2010-04-12 00:00:00

abstract：:Optimal choice of beam energy in radiation therapy is easy in many well-documented cases, but less obvious in some others. Low-energy beams may provide better conformity around the target than their high-energy counterparts due to reduced lateral scatter, but they also contribute to overdosage of peripheral normal tis...

journal_title：Journal of applied clinical medical physics

authors： St-Hilaire J,Sévigny C,Beaulieu F,Gingras L,Tremblay D,Beaulieu L

更新日期：2009-09-03 00:00:00

abstract：PURPOSE:This study aimed to evaluate dosimetric differences of intensity-modulated radiation therapy (IMRT) in target and normal tissues after breast-conserving surgery. METHODS:IMRT five-field plan I, IMRT six-field plan II, and field-in-field-direct machine parameter optimization-IMRT plan III were designed for each...

journal_title：Journal of applied clinical medical physics

authors： Zhang HW,Hu B,Xie C,Wang YL

更新日期：2018-05-01 00:00:00

abstract：PURPOSE:We conducted this dosimetric analysis to evaluate the feasibility of a multi-center stereotactic body radiation therapy (SBRT) trial for renal cell carcinoma (RCC) using different SBRT platforms. MATERIALS/METHODS:The computed tomography (CT) simulation images of 10 patients with unilateral RCC previously trea...

journal_title：Journal of applied clinical medical physics

authors： Baydoun A,Vapiwala N,Ponsky LE,Awan M,Kassaee A,Sutton D,Podder TK,Zhang Y,Dobbins D,Muzic RF Jr,Traughber B,Machtay M,Ellis R

更新日期：2018-03-14 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：INTRODUCTION:Increased modulation and dynamical delivery of external beam radiotherapy (EBRT), such as volumetric modulated arc therapy (VMAT) with dynamic gantry rotation, continuously variable dose rate (CVDR) and field shapes that change during the beam, place greater demands on the performance of linear accelerator...

journal_title：Journal of applied clinical medical physics

authors： van Appeldoorn AA,Kok JGM,Wolthaus JWH

更新日期：2020-10-23 00:00:00

abstract：:The goal of the present study was to develop a new dose-volume histogram (DVH)- based homogeneity index for effectively evaluating the dose homogeneity of intensity-modulated radiotherapy plans. The new index, called the sigma-index ("S-index") is defined as the standard deviation of the normalized differential DVH cu...

journal_title：Journal of applied clinical medical physics

authors： Yoon M,Park SY,Shin D,Lee SB,Pyo HR,Kim DY,Cho KH

更新日期：2007-03-20 00:00:00

abstract：:PET/CT imaging could improve delineation of rectal carcinoma gross tumor volume (GTV) and reduce interobserver variability. The objective of this work was to compare various functional volume delineation algorithms. We enrolled 31 consecutive patients with locally advanced rectal carcinoma. The FDG PET/CT and the high...

journal_title：Journal of applied clinical medical physics

authors： Withofs N,Bernard C,Van der Rest C,Martinive P,Hatt M,Jodogne S,Visvikis D,Lee JA,Coucke PA,Hustinx R

更新日期：2014-09-08 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：:This paper investigates the accuracy of the two available calculation algorithms of the Oncentra MasterPlan three-dimensional treatment planning system (TPS)-- the pencil beam method and collapsed-cone convolution--in modeling the Varian enhanced dynamic wedge (EDW). Measurements were carried out for a dual high energ...

journal_title：Journal of applied clinical medical physics

authors： Pasquino M,Borca VC,Tofani S,Ozzello F

更新日期：2009-04-22 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：PURPOSE:To investigate the differences between internal target volumes (ITVs) contoured on the simulation 4DCT and daily 4DCBCT images for lung cancer patients treated with stereotactic body radiotherapy (SBRT) and determine the dose delivered on 4D planning technique. METHODS:For nine patients, 4DCBCTs were acquired ...

journal_title：Journal of applied clinical medical physics

authors： Dumas M,Laugeman E,Sevak P,Snyder KC,Mao W,Chetty IJ,Ajlouni M,Wen N

更新日期：2020-10-12 00:00:00

abstract：:The American Association of Physicists in Medicine Task Group 36 (AAPM TG-36) data can be used to estimate peripheral dose (PD) distributions outside the primary radiation field. However, the report data does not apply to linear accelerators equipped with a multileaf collimator (MLC) and universal wedge (UW). Tertiary...

journal_title：Journal of applied clinical medical physics

authors： Mutic S,Esthappan J,Klein EE

更新日期：2002-10-01 00:00:00