Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Petri Sipilä"'
Publikováno v:
Physics in Medicine & Biology. 68:084003
Objective. Radiotherapy is a well-known alternative in the treatment of keloid scars to reduce the recurrence of scars. The purpose of this study was to investigate the feasibility and accuracy of dose delivered from a high-dose-rate (HDR) afterloade
Publikováno v:
Physica Medica. 59:107-111
Purpose The main objective of this study was to commission a commercial x-ray irradiation system to be used for cell and small animal studies. Materials and methods Evaluated characteristics of an x-ray irradiator included dose linearity and dose rep
Publikováno v:
Journal of Applied Clinical Medical Physics
Tampere University
Scopus-Elsevier
Tampere University
Scopus-Elsevier
In this study, the clinical benefit of the improved accuracy of the Acuros XB (AXB) algorithm, implemented in a commercial radiotherapy treatment planning system (TPS), Varian Eclipse, was demonstrated with beams traversing a high‐Z material. This
Autor:
Mikko Tenhunen, Jani Keyriläinen, Christian Nemoz, Manuel Fernández, Aki Kangasmäki, Marjut Leidenius, Petri Sipilä, Alberto Bravin, Karl von Smitten, Pekka Virkkunen, Marja-Liisa Karjalainen-Lindsberg, Pekka Suortti
Publikováno v:
Journal of Synchrotron Radiation. 18:689-696
High-resolution analyser-based X-ray imaging computed tomography (HR ABI-CT) findings on in vitro human breast cancer are compared with histopathology, mammography, computed tomography (CT) and magnetic resonance imaging. The HR ABI-CT images provide
Publikováno v:
Physics in Medicine and Biology. 56:2119-2130
We estimated cost/benefit ratios for different quality control programs of radiation output measurements of medical linear accelerators. The cost/benefit ratios of quality control (QC) programs (a combination of output measurement time interval and m
Autor:
Petri Sipilä, Pekka Virkkunen, Manuel Fernández, Mikko Tenhunen, Marja-Liisa Karjalainen-Lindsberg, Christian Nemoz, Stefan Fiedler, Marjut Leidenius, Jani Keyriläinen, Pekka Suortti, Karl von Smitten, Alberto Bravin
Publikováno v:
Physics in Medicine and Biology
Physics in Medicine and Biology, IOP Publishing, 2007, 52 (8), pp.2197-211. ⟨10.1088/0031-9155/52/8/011⟩
Physics in Medicine and Biology, IOP Publishing, 2007, 52 (8), pp.2197-211. ⟨10.1088/0031-9155/52/8/011⟩
International audience; The aim of this study was to introduce high-resolution computed tomography (CT) of breast tumours using the diffraction-enhanced x-ray imaging (DEI) technique and to compare results with radiological and histo-pathological exa
Publikováno v:
Journal of Applied Clinical Medical Physics
Tampere University
Scopus-Elsevier
Tampere University
Scopus-Elsevier
For megavoltage photon radiation, the fundamental dosimetry characteristics of Gafchromic EBT3 film were determined in 60Co gamma ray beam with addition of experimental and Monte Carlo (MC)‐simulated energy dependence of the film for 6 MV photon be
Publikováno v:
Physics in Medicine and Biology. 51:4857-4867
A method was developed to estimate the spread of treatment doses due to a given output measurement, time interval and action level in external photon beam radiotherapy. The method exploits empirical or simulated data of both output stability and the
Publikováno v:
Medical Physics. 31:1123-1127
A scintillation dosemeter is calibrated for 90Sr/90Y beta rays from an ophthalmic applicator, using an extrapolation ionization chamber as a reference instrument. The calibration factor for the scintillation dosemeter agrees with that given by the ma
Autor:
Tarja K. Ikäheimonen, K Vesterbacka, M. Kettunen, S. Klemola, T Honkamaa, S Ristonmaa, Riitta Zilliacus, Antti Kosunen, Vesa-Pekka Vartti, Roy Pöllänen, I Jokelainen, M. Hokkanen, Petri Sipilä
Publikováno v:
Pöllänen, R, Ikäheimonen, T, Klemola, S, Vartti, V-P, Vesterbacka, K, Ristonmaa, S, Honkamaa, T, Sipilä, P, Jokelainen, I, Kosunen, A, Zilliacus, R, Kettunen, M & Hokkanen, M 2002, ' Characterisation of projectiles composed of depleted uranium ', Journal of Environmental Radioactivity, vol. 64, no. 2-3, pp. 133-142 . https://doi.org/10.1016/S0265-931X(02)00044-9
Projectiles suspected to be composed of depleted uranium (DU) were found in Kosovo. Their properties were analysed using alpha and gamma ray spectrometry, mass spectrometry and electron microscopy. They were found to be composed of DU with small amou