Future trends in the supply and demand for radiation oncology physicists.

abstract：PURPOSE:This study evaluates the feasibility of lung dose prediction based on target contour and patient anatomy for breast patients treated with proton therapy. METHODS:Fifty-two randomly selected patients were included in the cohort, who were treated to 50.4-66.4 Gy(RBE) to the left (36), right (15), or bilateral (1...

journal_title：Journal of applied clinical medical physics

authors： Zeng C,Sine K,Mah D

更新日期：2018-11-01 00:00:00

abstract：:Quality control (QC) of CT scanners is important to evaluate image quality and radiation dose. Different QC phantoms for testing image quality parameters on CT are commercially available, and Catphan phantoms are widely used for this purpose. More data from measured image quality parameters on CT are necessary to asse...

journal_title：Journal of applied clinical medical physics

authors： Husby E,Svendsen ED,Andersen HK,Martinsen ACT

更新日期：2017-11-01 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：:The authors compared the relative dosimetric merits of Gamma Knife (GK) and CyberKnife (CK) in 15 patients with 26 brain metastases. All patients were initially treated with the Leksell GK 4C. The same patients were used to generate comparative CK treatment plans. The tissue volume receiving more than 12 Gy (V12), the...

journal_title：Journal of applied clinical medical physics

authors： Sio TT,Jang S,Lee SW,Curran B,Pyakuryal AP,Sternick ES

更新日期：2014-01-06 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：:A patient with a cardiac ventricular assist device (VAD) with computer-controlled driver presented to our department for radiation therapy. The treatment plan was 4500 cGy to the rectum over 25 fractions with 15MV photon beams. All beams avoided the pump and leads. The response to electromagnetic interference (EMI) wa...

journal_title：Journal of applied clinical medical physics

authors： Lasher DE,Wojcicka JB,Malcom R,Shears LL

更新日期：2008-10-29 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：:During volume-modulated arc therapies (VMAT), dosimetric errors are introduced by multiple open dynamic leaf gaps that are present in fixed diaphragm linear accelerators. The purpose of this work was to develop a methodology for adjusting the rounded leaf end modeling parameters to improve out-of-field dose agreement ...

journal_title：Journal of applied clinical medical physics

authors： Young LA,Yang F,Cao N,Meyer J

更新日期：2016-11-08 00:00:00

abstract：:In this work, the feasibility of using flattening filter free (FFF) beams in volumetric modulated arc therapy (VMAT) total body irradiation (TBI) treatment planning to decrease protracted beam-on times for these treatments was investigated. In addition, a methodology was developed to generate standardized VMAT TBI tre...

journal_title：Journal of applied clinical medical physics

authors： Frederick R,Hudson A,Balogh A,Cao JQ,Pierce G

更新日期：2020-03-01 00:00:00

abstract：PURPOSE:To assess the setup errors in radiation therapy for thoracic tumors patients of different somatotypes, and to seek an individualized mathematical basis for defining the planning target volume (PTV). METHODS:Sixty patients with thoracic tumors were divided into four somatotypes according to their body mass inde...

journal_title：Journal of applied clinical medical physics

authors： Zhao J,Zhang M,Zhai F,Wang H,Li X

更新日期：2018-05-01 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：:The use of solid carbon fiber table materials in radiotherapy has become more common with the implementation of image-guided radiotherapy (IGRT), since the solid materials give less imaging artifacts than the so-called tennis racket couchtops. The downside of the solid carbon fiber couch inserts is that they increase ...

journal_title：Journal of applied clinical medical physics

authors： Seppälä JK,Kulmala JA

更新日期：2011-11-15 00:00:00

abstract：:The management of a pregnant patient in radiation oncology is an infrequent event requiring careful consideration by both the physician and physicist. The aim of this manuscript was to highlight treatment planning techniques and detail measurements of fetal dose for a pregnant patient recently requiring treatment for ...

journal_title：Journal of applied clinical medical physics

authors： Labby ZE,Barraclough B,Bayliss RA,Besemer AE,Dunkerley DAP,Howard SP

更新日期：2018-09-01 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：:Precise radiation therapy (RT) for abdominal lesions is complicated by respiratory motion and suboptimal soft tissue contrast in 4D CT. 4D MRI offers improved con-trast although long scan times and irregular breathing patterns can be limiting. To address this, visual biofeedback (VBF) was introduced into 4D MRI. Ten v...

journal_title：Journal of applied clinical medical physics

authors： To DT,Kim JP,Price RG,Chetty IJ,Glide-Hurst CK

更新日期：2016-05-08 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：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：: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：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：: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:The aim of the current study was to evaluate the backscatter dose and energy spectrum from the Lipiodol with flattening filter (FF) and flattening filter-free (FFF) beams. Moreover, the backscatter range, that was defined as the backscatter distance (BD) are revealed. METHODS:6 MVX FF and FFF beams were delive...

journal_title：Journal of applied clinical medical physics

authors： Kawahara D,Ozawa S,Kimura T,Saito A,Nakashima T,Ohno Y,Murakami Y,Nagata Y,Shiinoki T

更新日期：2019-06-01 00:00:00

abstract：:The QFix EncompassTM stereotactic radiosurgery (SRS) immobilization system consists of a thermoplastic mask that attaches to the couch insert to immobilize patients treated with intracranial SRS. This study evaluates the dosimetric impact and verifies a vendor provided treatment planning system (TPS) model in the Ecli...

journal_title：Journal of applied clinical medical physics

authors： Snyder KC,Xhaferllari I,Huang Y,Siddiqui MS,Chetty IJ,Wen N

更新日期：2018-07-01 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：:Monte Carlo simulations are widely used for calculation of the dosimetric parameters of brachytherapy sources. MCNP4C2, MCNP5, MCNPX, EGS4, EGSnrc, PTRAN, and GEANT4 are among the most commonly used codes in this field. Each of these codes utilizes a cross-sectional library for the purpose of simulating different elem...

journal_title：Journal of applied clinical medical physics

authors： Zaker N,Zehtabian M,Sina S,Koontz C,Meigooni AS

更新日期：2016-03-08 00:00:00

abstract：:To monitor delivered dose and trigger plan adaptation when deviation becomes unacceptable, a clinical treatment dose (Tx-Dose) reconstruction system based on three-dimensional (3D)/four-dimensional (4D)-cone beam computed tomograpy (CBCT) images was developed and evaluated on various treatment sites, particularly for ...

journal_title：Journal of applied clinical medical physics

authors： Qin A,Gersten D,Liang J,Liu Q,Grill I,Guerrero T,Stevens C,Yan D

更新日期：2018-11-01 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：: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 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：:Remote afterloading devices used for high-dose-rate (HDR) brachytherapy may be supplied with different sources, and these sources typically have differing initial source strengths. In addition, the proposed frequency for source changes may also vary, depending upon the source type. Dosimetric parameters unique to each...

journal_title：Journal of applied clinical medical physics

authors： Davis SD,Parker W,Evans MD

更新日期：2013-11-04 00:00:00

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