Case study of radiation therapy treatment of a patient with a cardiac ventricular assist device.

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：:The main purposes of this study are to: 1) evaluate the accuracy of XiO treatment planning system (TPS) for different dose calculation grid size based on head phan-tom measurements in uniform scanning proton therapy (USPT); and 2) compare the dosimetric results for various dose calculation grid sizes based on real com...

journal_title：Journal of applied clinical medical physics

authors： Rana S,Zheng Y

更新日期：2015-09-08 00:00:00

abstract：:Patient dose from 2.5 MV images on the TrueBeam linear accelerator is not easily quantified, primarily because this beam energy is not normally modeled by commercial treatment planning systems. In this work we present the feasibility of using the Eclipse® treatment planning system to model this beam. The Acuros XB and...

journal_title：Journal of applied clinical medical physics

authors： Ferris WS,Culberson WS,Anderson DR,Labby ZE

更新日期：2019-12-01 00:00:00

abstract：:The purpose of the present study was to compare the impact of pulmonary function, body habitus, and stereotactic body radiation therapy (SBRT) immobilization on setup and reproducibility for upper lung tumor. From 2008 through 2011, our institution's prospective SBRT database was searched for patients with upper lung ...

journal_title：Journal of applied clinical medical physics

authors： Sio TT,Jensen AR,Miller RC,Fong de los Santos LE,Hallemeier CL,Foster NR,Park SS,Bauer HJ,Chang K,Garces YI,Olivier KR

更新日期：2014-09-08 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：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：INTRODUCTION:Designing a radiation plan that optimally delivers both target coverage and normal tissue sparing is challenging. There are limited tools to determine what is dosimetrically achievable and frequently the experience of the planner/physician is relied upon to make these determinations. PlanIQ software provid...

journal_title：Journal of applied clinical medical physics

authors： Fried DV,Chera BS,Das SK

更新日期：2017-09-01 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：:We conducted a metrological evaluation of the dosimetric impact due to the polysulfone cap used with the Fletcher-Williamson (FW) colpostat for 192Ir high-dose rate and pulsed-dose rate intracavitary brachytherapy using Monte Carlo simulations. Polysulfone caps with diameter of 30 mm, 25 mm, 20 mm, and 16 mm (mini-ovo...

journal_title：Journal of applied clinical medical physics

authors： Price MJ,Kry SF,Eifel PJ,Salehpour M,Mourtada F

更新日期：2010-01-28 00:00:00

abstract：:Doses in Leksell GammaPlan (Elekta, Stockholm, Sweden) are calculated for each shot by summing the contribution from the 201 radiation beams emitted by the Gamma Knife (Elekta), weighted for attenuation in the tissue traversed. The patient's head is modeled based on 24 skull measurements, from which the depth to the c...

journal_title：Journal of applied clinical medical physics

authors： Berndt A,Beck J

更新日期：2007-07-17 00:00:00

abstract：:The GafChromic XR Type R film is a relatively new product for recording high radiation dose in interventional radiological procedures. Means of measuring the film response were studied in this investigation. Two handheld reflective-type densitometers of different models were compared in the range of 0-8 Gy. They were ...

journal_title：Journal of applied clinical medical physics

authors： Thomas G,Chu RY,Rabe F

更新日期：2003-10-01 00:00:00

abstract：:Small field dosimetry is a challenging task. The difficulties of small field measurements, particularly stereotactic field size measurements, are highlighted by the large interinstitution variability that can be observed for circular cone collimator commissioning measurements. We believe the best way to improve the co...

journal_title：Journal of applied clinical medical physics

authors： Wiant DB,Terrell JA,Maurer JM,Yount CL,Sintay BJ

更新日期：2013-11-04 00:00:00

abstract：:The goal of this study was to investigate small field output factors (OFs) for flat-tening filter-free (FFF) beams on a dedicated stereotactic linear accelerator-based system. From this data, the collimator exchange effect was quantified, and detector-specific correction factors were generated. Output factors for 16 j...

journal_title：Journal of applied clinical medical physics

authors： Qin Y,Zhong H,Wen N,Snyder K,Huang Y,Chetty IJ

更新日期：2016-11-08 00:00:00

abstract：:The aim of this study was to report a single-institution experience and commissioning data for Elekta VersaHD linear accelerators (LINACs) for photon beams in the Eclipse treatment planning system (TPS). Two VersaHD LINACs equipped with 160-leaf collimators were commissioned. For each energy, the percent-depth-dose (P...

journal_title：Journal of applied clinical medical physics

authors： Zhang Y,Le AH,Tian Z,Iqbal Z,Chiu T,Gu X,Pugachev A,Reynolds R,Park YK,Lin MH,Stojadinovic S

更新日期：2019-10-01 00:00:00

abstract：:It is important to improve the magnitude of dose variation that is caused by the interplay effect. The aim of this study was to investigate the impact of the number of breaths (NBs) to the dose variation for VMAT-SBRT to lung cancer. Data on respiratory motion and multileaf collimator (MLC) sequence were collected fro...

journal_title：Journal of applied clinical medical physics

authors： Kubo K,Monzen H,Tamura M,Hirata M,Ishii K,Okada W,Nakahara R,Kishimoto S,Kawamorita R,Nishimura Y

更新日期：2018-03-01 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：: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：:MIM Symphony is a recently introduced low-dose-rate prostate brachytherapy treatment planning system (TPS). We evaluated the dosimetric and planning accuracy of this new TPS compared to the universally used VariSeed TPS. For dosimetric evaluation of the MIM Symphony version 5.4 TPS, we compared dose calculations from ...

journal_title：Journal of applied clinical medical physics

authors： Dhanesar SK,Lim TY,Du W,Bruno TL,Frank SJ,Kudchadker RJ

更新日期：2015-09-08 00:00:00

abstract：PURPOSE:Two different respiratory monitoring systems (Varian's Real-Time Position Management (RPM) System and Siemens' ANZAI belt Respiratory Gating System) are compared in the context of respiratory signals and 4D CT images that are accordingly reconstructed. This study aims to evaluate the feasibility of combined use...

journal_title：Journal of applied clinical medical physics

authors： Liu J,Lin T,Fan J,Chen L,Price R,Ma CC

更新日期：2018-09-01 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：:This study evaluated the basic dosimetric characteristics of a Dynamic Multi Leaf Collimator (DMLC) using a diode detector and film measurements for Intensity Modulated Radiation Therapy Quality Assurance (IMRT QA). The EGSnrc Monte Carlo (MC) simulation system was used for the determination of MLC characteristics. Ra...

journal_title：Journal of applied clinical medical physics

authors： Molazadeh M,Zeinali A,Robatjazi M,Shirazi A,Geraily G

更新日期：2017-03-01 00:00:00

abstract：:The objective of this work is the investigation of intense pulsed light (IPL) photoepilation using Monte Carlo simulation to model the effect of the output dosimetry with millisecond exposure used by typical commercial IPL systems. The temporal pulse shape is an important parameter, which may affect the biological tis...

journal_title：Journal of applied clinical medical physics

authors： Ash C,Donne K,Daniel G,Town G,Clement M,Valentine R

更新日期：2012-09-06 00:00:00

abstract：:The purpose of this investigation is to measure, characterize and report stray photon leakage and scatter radiation measurements from the Mobetron, an intraoperative electron linear accelerator designed for use in an operating room environment. The study is needed due to recent changes to the shielding design of the M...

journal_title：Journal of applied clinical medical physics

authors： Krechetov AS,Goer D,Dikeman K,Daves JL,Mills MD

更新日期：2010-09-07 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：: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：PURPOSE:To establish a streamlined end-to-end test of a 6 degrees-of-freedom (6DoF) robotic table using a 3D printed phantom for periodic quality assurance. METHODS:A 3D printed phantom was fabricated with translational and rotational offsets and an imbedded central ball-bearing (BB). The phantom underwent each step o...

journal_title：Journal of applied clinical medical physics

authors： Woods K,Ayan AS,Woollard J,Gupta N

更新日期：2018-01-01 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：OBJECTIVES:To compare the effectiveness of two different patient size metrics based on water equivalent diameter (Dw ), the mid-scan water equivalent diameter Dw_c , and the mean (average) water equivalent diameter in the imaged region, Dw_ave , for automatic detection of accidental changes in computed tomography (CT) ...

journal_title：Journal of applied clinical medical physics

authors： Sarmento S,Mendes B,Gouvêa M

更新日期：2018-01-01 00:00:00

abstract：:We have developed a treatment planning protocol for intensity-modulated radiation therapy of the prostate using commercially available inverse planning software. Treatment plans were developed for ten patients using the Corvus version 3.8 planning system, testing various prescription options, including tissue types, d...

journal_title：Journal of applied clinical medical physics

authors： Ezzell GA,Schild SE,Wong WW

更新日期：2001-04-01 00:00:00

abstract：:The control loop in the Varian DMLC system (V4.8) requires approximately 65 msec to monitor and halt the irradiation of a segment, causing an "overshoot" effect: the segment ends on a fractional monitor unit larger than that planned. As a result, the actual MU delivered may differ from that planned. In general, for st...

journal_title：Journal of applied clinical medical physics

authors： Ezzell GA,Chungbin S

更新日期：2001-07-01 00:00:00