Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Mahmoud, Allahverdi"'
Autor:
Alireza Mohammadkarim, Hasan Ali Nedaie, Mahmoud Allahverdi, Mahbod Esfehani, Alireza Shirazi, Ghazale Geraily
Publikováno v:
Iranian Journal of Medical Physics, Vol 12, Iss 4, Pp 262-270 (2016)
Introduction Evaluation of the delivered dose of externally wedged photon beams by external diode dosimeters during the treatment process requires the estimation of exit surface dose correction factors in various wedge angles and field sizes. Materia
Externí odkaz:
https://doaj.org/article/fa1a37d86b7b4ea699a82189bec9e3cc
Publikováno v:
Basic & Clinical Cancer Research, Vol 3, Iss 2 (2016)
Background: Delivering the maximum dose to tumor while achieving the minimum dose delivery to normal tissue; is the most important goal in external radiotherapy. Diode in vivo dosimetry is widely considered to be an important tool for quality improve
Externí odkaz:
https://doaj.org/article/9e1fc51f5f1d4f17982baa93b73adb87
Publikováno v:
Iranian Journal of Medical Physics, Vol 9, Iss 1, Pp 1-8 (2012)
Introduction Polymer gel dosimeters offer a practical solution to 3D dose verification for conventional radiotherapy as well as intensity-modulated and stereotactic radiotherapy. In this study, EGSnrc calculated and PAGAT polymer gel dosimeter measur
Externí odkaz:
https://doaj.org/article/7aa9b2b3a887457895399735d6b9e932
Autor:
Mahmoud Allahverdi, Alireza Mohammadkarim, Mahbod Esfehani, Hasanali Nedaie, Alireza Shirazi, Ghazale Geraily
Publikováno v:
Journal of Medical Physics, Vol 37, Iss 1, Pp 32-39 (2012)
An in vivo dosimetry system, using p-type diode dosimeters, was characterized for clinical applications of treatment machines ranging in megavoltage energies. This paper investigates two different models of diodes for externally wedged beams and expl
Externí odkaz:
https://doaj.org/article/4112a54367c74219b6ba556a05d6fdbc
Publikováno v:
Iranian Journal of Medical Physics, Vol 8, Iss 3, Pp 73-81 (2011)
Introduction: The complex geometry of breast and also lung and heart inhomogeneities near the planning target volume (PTV) result in perturbations in dose distribution. This problem can result in overdosage or underdosage in the match region of the t
Externí odkaz:
https://doaj.org/article/a64234792eb44fcca6b3f5f05d0df665
Autor:
Leaila Karimi-Afshar, Nader Riahi Alam, Mohammadreza Ay, Mahmoud Allahverdi, Tayeb Alahverdi purfallah, Hassan Hashemi, Ahmad Farahani, Behrooz Reafie, Morteza Bakhteiari
Publikováno v:
Iranian Journal of Medical Physics, Vol 6, Iss 2, Pp 59-70 (2009)
Introduction: Computed tomography (CT) has numerous applications in clinical procedures but its main problem is its high radiation dose to the patients compared to other imaging modalities using x-ray. CT delivers approximately high doses to the near
Externí odkaz:
https://doaj.org/article/5fda390024014f22b8063b0b694e007a
Rapid and complete cyst resolution in a case of craniopharyngioma following Gamma knife radiosurgery
Autor:
Mohammad Ali Bitaraf, Maziar Aza, Farid Kazemi, Mazdak Alikhani Ahmad Shariftabrizi, Mahmoud Allahverdi, lireza Zahiri, Soraia Salmanian
Publikováno v:
International Journal of Hematology-Oncology and Stem Cell Research, Vol 2, Iss 1, Pp 33-35 (2005)
A case of cystic craniopharyngioma is presented in which multiple micro-surgeries failed to result in cyst resolution and significant enhancement in patients symptoms. Tumor irradiation using Leksell Gamma knife resulted in complete absorption of the
Externí odkaz:
https://doaj.org/article/158fa0517290448a9f66c8b48a18a464
Autor:
Sayed A. Vaezzadeh, Mahmoud Allahverdi, Otto A. Sauer, Hassan Ali Nedaie, Khadijeh Asnaashari, Mehran Yarahmadi
Publikováno v:
Zeitschrift für Medizinische Physik. 23:291-299
Background In stereotactic radiosurgery, sharp beam edges have clear advantages to spare normal tissues. In general, the dose gradient is a limiting factor in minimizing dose to nearby critical structures for clinical cases. Therefore the penumbral w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6b567e2faa1d5004509c3d999337116e
https://doi.org/10.1016/j.zemedi.2013.03.011
https://doi.org/10.1016/j.zemedi.2013.03.011
Autor:
Mahmoud, Allahverdi1, Somayeh, Nourollahi1 y.nourollahi@yahoo.com, Mahbod, Esfahani2, Mehdi, Aghili2, Vahid, Changizi1, Ghazale, Geraily1
Publikováno v:
Journal of Cancer Research & Therapeutics. Jan-Mar2013, Vol. 9 Issue 1, p64-70. 7p.
Autor:
Alireza Shirazi, H.A. Nedaie, Mehran Yarahmadi, Mohammad Reza Ay, Mahmoud Allahverdi, Seyedali Vaezzadeh
Publikováno v:
Medical Dosimetry. 38:176-183
The electron benefit transfer (EBT) GAFCHROMIC films possess a number of features making them appropriate for high-quality dosimetry in intensity-modulated radiation therapy (IMRT). Compensators to deliver IMRT are known to change the beam-energy spe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dfa307f0e50a579e416d85d0bd915166
https://doi.org/10.1016/j.meddos.2012.11.001
https://doi.org/10.1016/j.meddos.2012.11.001