abstract：:A wide variety of existing combinations of target and filter materials (target/filter combinations) are used in mammography equipment. The patient dose depends on the X-ray quality that is derived from the target/filter combination, and a calibration of the dosimeter that is used in the measurement that corresponds to...

journal_title：Journal of applied clinical medical physics

authors： Sekimoto M,Katoh Y,Katoh T

更新日期：2015-11-08 00:00:00

abstract：:The purpose of this study is to determine whether organ sparing and target coverage can be simultaneously maintained for pencil beam scanning (PBS) proton therapy treatment of thoracic tumors in the presence of motion, stopping power uncertainties, and patient setup variations. Ten consecutive patients that were previ...

journal_title：Journal of applied clinical medical physics

authors： Lin L,Kang M,Huang S,Mayer R,Thomas A,Solberg TD,McDonough JE,Simone CB 2nd

更新日期：2015-11-08 00:00:00

abstract：:Measurement of cumulative dose ƒ(0,150) with a small ionization chamber within standard polymethyl methacrylate (PMMA) CT head and body phantoms, 150 mm in length, is a possible practical method for cone-beam computed tomography (CBCT) dosimetry. This differs from evaluating cumulative dose under scatter equilibrium c...

journal_title：Journal of applied clinical medical physics

authors： Abuhaimed A,Martin CJ,Sankaralingam M,Oomen K,Gentle DJ

更新日期：2015-11-08 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：:For patients with medically inoperable early-stage non-small cell lung cancer (NSCLC) treated with stereotactic body radiation therapy, early treatment plans were based on a simpler dose calculation algorithm, the pencil beam (PB) calculation. Because these patients had the longest treatment follow-up, identifying dos...

journal_title：Journal of applied clinical medical physics

authors： Liu H,Zhuang T,Stephans K,Videtic G,Raithel S,Djemil T,Xia P

更新日期：2015-11-08 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：: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：: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：: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：: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：:The aim of this work is to evaluate the performance of a commercial brachytherapy treatment planning system (TPS) with TG-43 Vendors Input Data (VID), analyze possible discrepancies with respect to a proper reference source and its implications for standard treatments, and judge the effectiveness of certain widespread...

journal_title：Journal of applied clinical medical physics

authors： Valdés CN,Píriz GH,Lozano E

更新日期：2015-07-08 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：: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 study is to evaluate the accuracy of the electron Monte Carlo (eMC) dose calculation algorithm included in a commercial treatment planning system and compare its performance against an electron pencil beam algorithm. Several tests were performed to explore the system's behavior in simple geometries...

journal_title：Journal of applied clinical medical physics

authors： Chamberland E,Beaulieu L,Lachance B

更新日期：2015-05-08 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：: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 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：:TomoEDGE is an advanced delivery form of tomotherapy which uses a dynamic secondary collimator. This plan comparison study describes the new features, their clinical applicability, and their effect on plan quality and treatment speed. For the first 45 patients worldwide that were scheduled for a treatment with TomoEdg...

journal_title：Journal of applied clinical medical physics

authors： Katayama S,Haefner MF,Mohr A,Schubert K,Oetzel D,Debus J,Sterzing F

更新日期：2015-03-08 00:00:00

abstract：:We assessed interfraction positional variation in pancreatic tumors using daily breath-hold cone-beam computed tomography at end-exhalation (EE) with visual feedback (BH-CBCT). Eleven consecutive patients with pancreatic cancer who underwent BH intensity-modulated radiation therapy with visual feedback were enrolled. ...

journal_title：Journal of applied clinical medical physics

authors： Nakamura M,Akimoto M,Ono T,Nakamura A,Yano S,Nakata M,Itasaka S,Mizowaki T,Shibuya K,Hiraoka M

更新日期：2015-03-08 00:00:00

abstract：:The purpose of this study was to describe our experience with 1.0T MR-SIM including characterization, quality assurance (QA) program, and features necessary for treatment planning. Staffing, safety, and patient screening procedures were developed. Utilization of an external laser positioning system (ELPS) and MR-compa...

journal_title：Journal of applied clinical medical physics

authors： Glide-Hurst CK,Wen N,Hearshen D,Kim J,Pantelic M,Zhao B,Mancell T,Levin K,Movsas B,Chetty IJ,Siddiqui MS

更新日期：2015-03-08 00:00:00

abstract：:The assessment of intracranial aneurysms is increasingly performed using three-dimensional cone-beam rotational angiography (3D CBRA). To reduce the dose to the patient during 3D CBRA procedures, filtered region-of-interest imaging (FROI) is presented in literature to be an effective technique as the dose in regions o...

journal_title：Journal of applied clinical medical physics

authors： Göpfert F,Schmidt R,Wulff J,Zink K

更新日期：2015-03-08 00:00:00

abstract：:The accuracy of the CyberKnife Synchrony Respiratory Tracking System (SRTS) is considered to be patient-dependent because the SRTS relies on an individual correlation between the internal tumor position (ITP) and the external marker position (EMP), as well as a prediction method to compensate for the delay incurred to...

journal_title：Journal of applied clinical medical physics

authors： Inoue M,Shiomi H,Iwata H,Taguchi J,Okawa K,Kikuchi C,Inada K,Iwabuchi M,Murai T,Koike I,Tatewaki K,Ohta S,Inoue T

更新日期：2015-01-08 00:00:00

abstract：:The purpose of this study was to compare dosimetric parameters of treatment plans among four techniques for preoperative single-fraction partial breast radiotherapy in order to select an optimal treatment technique. The techniques evaluated were noncoplanar 3D conformal radiation therapy (3D CRT), noncoplanar intensit...

journal_title：Journal of applied clinical medical physics

authors： Yoo S,Blitzblau R,Yin FF,Horton JK

更新日期：2015-01-08 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：:Breast treatments are becoming increasingly complex as the use of modulated and partial breast therapies becomes more prevalent. These methods are predicated on accurate and precise positioning for treatment. However, the ability to quantify intrafraction motion has been limited by the excessive dose that would result...

journal_title：Journal of applied clinical medical physics

authors： Wiant DB,Wentworth S,Maurer JM,Vanderstraeten CL,Terrell JA,Sintay BJ

更新日期：2014-11-08 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：: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 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：: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：: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：:Two patients with multiple lung metastases (≥ 5) were treated using frameless stereotactic body radiation therapy (SBRT) on an Elekta Axesse linear accelerator equipped with an interdigitation-capable multileaf collimator and four-dimensional cone-beam CT (4D CBCT). The technique and the early clinical outcomes were e...

journal_title：Journal of applied clinical medical physics

authors： Li Q,Mu J,Gu W,Chen Y,Ning Z,Jin J,Pei H

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：: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：:The aim of this study was to assess the performance of a gantry-mounted detector system and a couch set detector system using a systematic multileaf collimator positional error manually introduced for volumetric-modulated arc therapy. Four head and neck and esophagus VMAT plans were evaluated by measurement using an e...

journal_title：Journal of applied clinical medical physics

authors： Manikandan A,Sarkar B,Nandy M,Sureka CS,Gossman MS,Sujatha N,Rajendran VT

更新日期：2014-05-08 00:00:00

abstract：:IMRT QA requires, among other tests, a time-consuming process of measuring the absorbed dose, at least to a point, in a high-dose, low-dose-gradient region. Some clinics use a technique of measuring this dose with all beams delivered at a single gantry angle (collapsed delivery), as opposed to the beams delivered at t...

journal_title：Journal of applied clinical medical physics

authors： Conneely E,Alexander A,Ruo R,Chung E,Seuntjens J,Foley MJ

更新日期：2014-05-08 00:00:00

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：:The purpose of this study is to find the uncertainties in the reconstruction of MR compatible ring-tandem intracavitary applicators of high-dose rate image-based brachytherapy treatment planning using rigid registration of 3D MR and CT image fusion. Tandem and ring reconstruction in MR image based brachytherapy planni...

journal_title：Journal of applied clinical medical physics

authors： Oinam AS,Tomar P,Patel FD,Singh L,Rai B,Bahl A

更新日期：2014-03-06 00:00:00

abstract：:Treatment planning for breast cancer has been traditionally based on clinical landmarks. The Radiation Therapy Oncology Group (RTOG) published consensus guidelines on contouring target volumes (TV) for the breast/chest wall and draining lymphatics. The effect of these guidelines on dosimetric parameters in surrounding...

journal_title：Journal of applied clinical medical physics

authors： Rudra S,Al-Hallaq HA,Feng C,Chmura SJ,Hasan Y

更新日期：2014-03-06 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：: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