journal
MENU ▼
Read by QxMD icon Read
search

Journal of Medical Physics

journal
https://www.readbyqxmd.com/read/28706358/response-to-the-comments-on-the-feasibility-study-of-a-hybrid-coplanar-arc-technique-versus-hybrid-intensity-modulated-radiotherapy-in-treatment-of-early-stage-left-sided-breast-cancer-with-simultaneous-integrated-boost-j-med-phys-2017-42-1-8
#1
Yuan-Gui Chen, An-Chuan Li, Wen-Yao Li, Miao-Yun Huang, Xiao-Bo Li, Ming-Qiu Chen, Mutian Zhang, Ben-Hua Xu
No abstract text is available yet for this article.
April 2017: Journal of Medical Physics
https://www.readbyqxmd.com/read/28706357/reference-to-chen-yg-li-ac-li-wy-huang-my-li-xb-chen-mq-et-al-the-feasibility-study-of-a-hybrid-coplanar-arc-technique-versus-hybrid-intensity-modulated-radiotherapy-in-treatment-of-early-stage-left-sided-breast-cancer-with-simultaneous-integrated-boost-j-med
#2
https://www.readbyqxmd.com/read/28706356/radioactive-cobalt-60-teletherapy-machine-estimates-of-personnel-dose-in-mock-emergency-in-patient-release-during-source-stuck-situation
#3
Ramamoorthy Ravichandran
No abstract text is available yet for this article.
April 2017: Journal of Medical Physics
https://www.readbyqxmd.com/read/28706355/the-influence-of-acquisition-mode-on-the-dosimetric-performance-of-an-amorphous-silicon-electronic-portal-imaging-device
#4
Omemh Bawazeer, Sisira Herath, Siva Sarasanandarajah, Tomas Kron, Pradip Deb
AIMS: This study investigates the impact of cine acquisition mode on the dosimetric characteristics of a Varian aS500 amorphous silicon electronic portal imaging device (a-Si EPID). MATERIALS AND METHODS: The performance of an a-Si EPID operated in cine mode was assessed and compared to its performance when operated in an integrated mode and dose measurements using an ionization chamber. This study was conducted at different photon energies and the EPID performance was assessed as function of the delivered dose, dose rate, multileaf collimator speed, field size, phantom thickness, and intensity-modulated radiation therapy fields...
April 2017: Journal of Medical Physics
https://www.readbyqxmd.com/read/28706354/intensities-of-incident-and-transmitted-ultraviolet-a-rays-through-gafchromic-films
#5
Toshizo Katsuda, Rumi Gotanda, Tatsuhiro Gotanda, Takuya Akagawa, Nobuyoshi Tanki, Tadao Kuwano, Atsushi Noguchi, Kouichi Yabunaka
Gafchromic films have been applied to X-ray dosimetry in diagnostic radiology. To correct nonuniformity errors in Gafchromic films, X-rays in the double-exposure technique can be replaced with ultraviolet (UV)-A rays. Intensities of the incident and transmitted UV-A rays were measured. However, it is unclear whether the chemical color change of Gafchromic films affects the UV-A transmission intensity. Gafchromic EBT3 films were suitable to be used in this study because non-UV protection layers are present on both sides of the film...
April 2017: Journal of Medical Physics
https://www.readbyqxmd.com/read/28706353/a-dosimetric-study-on-slab-pinewood-slab-phantom-for-developing-the-heterogeneous-chest-phantom-mimicking-actual-human-chest
#6
Om Prakash Gurjar, Radha Kishan Paliwal, Surendra Prasad Mishra
The aim is to study the density, isodose depths, and doses at different points in slab-pinewood-slab (SPS) phantom, solid phantom SP34 (made up of polystyrene), and chest level of actual patient for developing heterogeneous chest phantom mimicking thoracic region of human body. A 6 MV photon beam of field size of 10 cm × 10 cm was directed perpendicular to the surface of computed tomography (CT) images of chest level of patient, SPS phantom, and SP34 phantom. Dose was calculated using anisotropic analytical algorithm...
April 2017: Journal of Medical Physics
https://www.readbyqxmd.com/read/28706352/monte-carlo-calculation-of-beam-quality-and-phantom-scatter-corrections-for-lithium-formate-electron-paramagnetic-resonance-dosimeter-for-high-energy-brachytherapy-dosimetry
#7
Subhalaxmi Mishra, T Palani Selvam
PURPOSE: To investigate beam quality correction, KQQ0 (r) and phantom scatter correction, Kphan (r) for lithium formate dosimeter as a function of distance r along the transverse axis of the high-energy brachytherapy sources (60)Co, (137)Cs, (192)Ir and (169)Yb using the Monte Carlo-based EGSnrc code system. MATERIALS AND METHODS: The brachytherapy sources investigated in this study are BEBIG High Dose Rate (HDR) (60)Co (model Co0.A86), (137)Cs (model RTR), HDR (192)Ir (model Microselectron) and HDR (169)Yb (model 4140)...
April 2017: Journal of Medical Physics
https://www.readbyqxmd.com/read/28706351/beam-characterization-of-10-mv-photon-beam-from-medical-linear-accelerator-without-flattening-filter
#8
Tomohiro Shimozato, Yuichi Aoyama, Takuma Matsunaga, Katsuyoshi Tabushi
AIM: This work investigated the dosimetric properties of a 10-MV photon beam emitted from a medical linear accelerator (linac) with no flattening filter (FF). The aim of this study is to analyze the radiation fluence and energy emitted from the flattening filter free (FFF) linac using Monte Carlo (MC) simulations. MATERIALS AND METHODS: The FFF linac was created by removing the FF from a linac in clinical use. Measurements of the depth dose (DD) and the off-axis profile were performed using a three-dimensional water phantom with an ionization chamber...
April 2017: Journal of Medical Physics
https://www.readbyqxmd.com/read/28706350/investigating-the-electronic-portal-imaging-device-for-small-radiation-field-measurements
#9
Arpita Agarwal, Nikhil Rastogi, K J Maria Das, S A Yoganathan, D Udayakumar, Shaleen Kumar
PURPOSE: With the advent of state-of-the-art treatment technologies, the use of small fields has increased, and dosimetry in small fields is highly challenging. In this study, the potential use of Varian electronic portal imaging device (EPID) for small field measurements was explored for 6 and 15 MV photon beams. MATERIALS AND METHODS: The output factors and profiles were measured for a range of jaw-collimated square field sizes starting from 0.8 cm × 0.8 cm to 10 cm × 10 cm using EPID...
April 2017: Journal of Medical Physics
https://www.readbyqxmd.com/read/28405111/erratum-clinical-implications-of-eclipse-analytical-anisotropic-algorithm-and-acuros-xb-algorithm-for-the-treatment-of-lung-cancer
#10
(no author information available yet)
[This corrects the article on p. 219 in vol. 41, PMID: 28144113.].
January 2017: Journal of Medical Physics
https://www.readbyqxmd.com/read/28405110/issue-of-in-water-calibration-certificate-for-cobalt-beam-quality-at-10-cm-reference-depth-is-it-admissible-under-trs-398-protocol
#11
Ramamoorthy Ravichandran
No abstract text is available yet for this article.
January 2017: Journal of Medical Physics
https://www.readbyqxmd.com/read/28405109/bystander-effect-and-second-primary-cancers-following-radiotherapy-what-are-its-significances
#12
Masoud Najafi, Ashkan Salajegheh, Abolhasan Rezaeyan
No abstract text is available yet for this article.
January 2017: Journal of Medical Physics
https://www.readbyqxmd.com/read/28405108/assessment-of-regional-pediatric-computed-tomography-dose-indices-in-tamil-nadu
#13
A Saravanakumar, K Vaideki, K N Govindarajan, S Jayakumar, B Devanand
The aim of this article is to assess Tamil Nadu pediatric computed tomography (CT) diagnostic reference levels (DRLs) by collecting radiation dose data for the most commonly performed CT examinations. This work was performed for thirty CT scanners installed in various parts of the Tamil Nadu region. The patient cohort was divided into two age groups: <1 year, and 1-5 years. CT dose indices were measured using a 10 cm(3) pencil ion chamber with pediatric head and body polymethyl methacrylate phantoms. Dose data such as volumetric CT dose index (CTDIv) and dose length product (DLP) on a minimum of twenty average-sized pediatric patients in each category were recorded to calculate a mean site CTDIv and DLP value...
January 2017: Journal of Medical Physics
https://www.readbyqxmd.com/read/28405107/response-of-nanodot-optically-stimulated-luminescence-dosimeters-to-therapeutic-electron-beams
#14
Y Retna Ponmalar, Ravikumar Manickam, S Sathiyan, K M Ganesh, R Arun, Henry Finlay Godson
Response of Al2O3:C-based nanoDot optically stimulated luminescence (OSL) dosimeter was studied for the dosimetry of 6, 9, 12, 16, and 20 MeV therapeutic electron beams. With reference to ionization chamber, no change in the response was observed with the change in the energy of electron beams for the field size from 6 cm × 6 cm to 25 cm × 25 cm, dose rates from 100 MU/min to 600 MU/min, and the linearity in the response up to 300 cGy. The fading of the transient signal was higher for 20 MeV electron beam than that of 6 MeV electron beam by about 5% as compared to value at 20 min after irradiation...
January 2017: Journal of Medical Physics
https://www.readbyqxmd.com/read/28405106/evaluation-of-intensity-modulated-radiation-therapy-delivery-system-using-a-volumetric-phantom-on-the-basis-of-the-task-group-119-report-of-american-association-of-physicists-in-medicine
#15
Raphaela Avgousti, Christina Armpilia, Ioannis Floros, Christos Antypas
The current work describes the implementation of the American Association of Physicists in Medicine (AAPM)'s Task Group 119 report on a volumetric phantom (Delta(4), Scandidos, Uppsala, Sweden) following the stated dose goals, to evaluate the step-and-shoot intensity modulated radiation therapy (IMRT) system. Delta(4) consists of diode detectors, lying on two crossed planes, measuring the delivered dose, and providing two-dimensional dosimetric information. Seven plans of different goals and complexity were performed, with individual structure sets...
January 2017: Journal of Medical Physics
https://www.readbyqxmd.com/read/28405105/hesperidin-as-radioprotector-against-radiation-induced-lung-damage-in-rat-a-histopathological-study
#16
Gholam Hassan Haddadi, Abolhasan Rezaeyan, Mohammad Amin Mosleh-Shirazi, Massood Hosseinzadeh, Reza Fardid, Masoud Najafi, Ashkan Salajegheh
Reactive oxygen species (ROS) are generated by ionizing radiation, and one of the organs commonly affected by ROS is the lung. Radiation-induced lung injury including pneumonia and lung fibrosis is a dose-limiting factor in radiotherapy (RT) of patients with thorax irradiation. Administration of antioxidants has been proved to protect against ROS. The present study was aimed to assess the protective effect of hesperidin (HES) against radiation-induced lung injury of male rats. Fifty rats were divided into three groups...
January 2017: Journal of Medical Physics
https://www.readbyqxmd.com/read/28405104/structural-shielding-design-of-a-6-mv-flattening-filter-free-linear-accelerator-indian-scenario
#17
Bibekananda Mishra, T Palani Selvam, P K Dash Sharma
Detailed structural shielding of primary and secondary barriers for a 6 MV medical linear accelerator (LINAC) operated with flattening filter (FF) and flattening filter free (FFF) modes are calculated. The calculations have been carried out by two methods, one using the approach given in National Council on Radiation Protection (NCRP) Report No. 151 and the other based on the monitor units (MUs) delivered in clinical practice. Radiation survey of the installations was also carried out. NCRP approach suggests that the primary and secondary barrier thicknesses are higher by 24% and 26%...
January 2017: Journal of Medical Physics
https://www.readbyqxmd.com/read/28405103/comparison-of-rapid-arc-and-intensity-modulated-radiotherapy-plans-using-unified-dosimetry-index-and-the-impact-of-conformity-index-on-unified-dosimetry-index-evaluation
#18
Jayapalan Krishnan, Jayarama Shetty, Suresh Rao, Sanath Hegde, C Shambhavi
The aim of this study was to evaluate the impact of conformity index in the unified dosimetry index (UDI) score for two different planning techniques namely intensity-modulated radiotherapy (IMRT) and Rapid Arc. Rapid Arc and IMRT plans of 57 patients were evaluated and compared using UDI score which incorporates four indices. To determine the impact of conformity index on the IMRT and Rapid Arc plans, UDI at conformity index one of all plan (UDIunit_CI) score was calculated by assuming conformity index is equal to one...
January 2017: Journal of Medical Physics
https://www.readbyqxmd.com/read/28405102/measurement-of-total-scatter-factor-for-stereotactic-cones-with-plastic-scintillation-detector
#19
Suresh H Chaudhari, Rishabh Dobhal, Rajesh A Kinhikar, Sudarshan S Kadam, Deepak D Deshpande
Advanced radiotherapy modalities such as stereotactic radiosurgery (SRS) and image-guided radiotherapy may employ very small beam apertures for accurate localized high dose to target. Accurate measurement of small radiation fields is a well-known challenge for many dosimeters. The purpose of this study was to measure total scatter factors for stereotactic cones with plastic scintillation detector and its comparison against diode detector and theoretical estimates. Measurements were performed on Novalis Tx(™) linear accelerator for 6MV SRS beam with stereotactic cones of diameter 6 mm, 7...
January 2017: Journal of Medical Physics
https://www.readbyqxmd.com/read/28405101/the-feasibility-study-of-a-hybrid-coplanar-arc-technique-versus-hybrid-intensity-modulated-radiotherapy-in-treatment-of-early-stage-left-sided-breast-cancer-with-simultaneous-integrated-boost
#20
Yuan-Gui Chen, An-Chuan Li, Wen-Yao Li, Miao-Yun Huang, Xiao-Bo Li, Ming-Qiu Chen, Mutian Zhang, Ben-Hua Xu
This study demonstrated the feasibility and advantages of a hybrid, volumetric arc therapy technique that used two 90° coplanar arcs and two three-dimensional conformal tangential beams in the simultaneous-integrated boost radiotherapy of left-sided breast cancer after breast-conserving surgery. A total of nine patients with stage I, left-sided breast cancer who underwent breast-conserving surgery were selected for this retrospective study. For each patient, a hybrid arc plan was generated and then compared with two hybrid intensity-modulated radiotherapy plans...
January 2017: Journal of Medical Physics
journal
journal
32112
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"