نتایج جستجو برای: epid dosimetry

تعداد نتایج: 8632  

Journal: :Acta Scientiarum. Animal Sciences 2022

This study aimed to investigate direct and indirect correlations of methodologies bone quality analysis from brown egg layers, at final the production cycle. Twelve femurs Dekalb Brown laying hens, euthanized 85-week-old, were assessed evaluate breaking strength (BS), Seedor index (SI), mineral matter (MM), calcium (Ca) phosphorus (P) contents, besides cortical (CorD), medullar (MedD) epiphysis...

2010
James L. Abbruzzese

Download creatic cancer (PC) is a highly lethal disease with complex etiology involving both environmental netic factors. Although cigarette smoking is known to explain 25% of cases, data from recent studies sugat obesity and long-term type II diabetes are twomajor modifiable risk factors for PC. Furthermore, obed diabetes seem to affect the clinical outcome of patients with PC. Understanding t...

Journal: :iranian journal of radiation research 0
s. r. mahdavi medical physics department of iran university of medical sciences, tehran, iran e. jazayeri gharehbagh department of radiology and radiotherapy technology, school of allied health sciences, tehran university of medical sciences, tehran, iran b. mofid 3radiotherapy department of shahid beheshti university of medical sciences, tehran, iran a. h. jafari research center of biomedical technology and robotics, tehran university of medial sciences, tehran, iran a. r. nikoofar radiotherapy department of iran university of medical sciences, tehran, iran

background: to correct patient positioning errors (setup errors) during prostate cancer treatment using epid and fiducial gold markers, to improve the accuracy of the dose delivery in these patients. materials and methods: fifteen patients with localized prostate carcinoma after implantation of fiducial gold markers in their prostate gland underwent the five-field imrt planning technique. the p...

Journal: :Tierarztliche Praxis. Ausgabe G, Grosstiere/Nutztiere 2014
M Pilz C Fischer-Tenhagen M Grau W Heuwieser

OBJECTIVES AND AIM The objective of this study was to determine the origin of an arched back in cows during vaginal examination. Moreover, we tested whether the duration of an arched back and avoidance reactions during vaginal examination can be decreased by epidural anaesthesia or analgesic treatment. MATERIAL AND METHODS Behaviour during cleaning of the perivaginal region and during vaginal...

Journal: :Medical physics 2012
K Hosier C Wu K Beck M Radevic D Asche J Bareng A Kroner J Lehmann M Logsdon S Dutton S Rosenthal

PURPOSE To investigate various issues for clinical implementation of aSi EPID panels for IMRT/VMAT QA. METHODS Six linacs are used in our clinic for EPID-based plan QA; two Varian Truebeams, two Varian 2100 series, two Elekta Infiniti series. Multiple corrections must be accounted for in the calibration of each panel for dosimetric use. Varian aSi panels are calibrated with standard dark fiel...

Journal: :Structure 2000
A Albert M Martínez-Ripoll A Espinosa-Ruiz L Yenush F A Culiáñez-Macià R Serrano

BACKGROUND The Arabidopsis thaliana HAL3 gene product encodes for an FMN-binding protein (AtHal3) that is related to plant growth and salt and osmotic tolerance. AtHal3 shows sequence homology to ScHal3, a regulatory subunit of the Saccharomyces cerevisae serine/threonine phosphatase PPz1. It has been proposed that AtHal3 and ScHal3 have similar roles in cellular physiology, as Arabidopsis tran...

Journal: :Medical physics 2012
B King P Greer

PURPOSE To develop a method for removing the effect of support arm backscatter from Varian electronic portal imaging devices (EPIDs), improving the dosimetric abilities of the imager. METHODS A physical, kernel based model of the backscatter signal produced during an exposure was developed. The model parameters were determined through an optimization process, comparing measured images without...

Journal: :Juntendo Medical Journal 2022

Objectives To develop a method for detecting jaw positions during jaw-tracking delivery to ensure an accurate of radiation patients using electronic portal imaging device (EPID) in the cine mode on linear accelerator radiotherapy.

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