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Tytuł pozycji:

Detectors assessment for stereotactic radiosurgery with cones.

Tytuł:
Detectors assessment for stereotactic radiosurgery with cones.
Autorzy:
Garnier N; Medical Physics Department, Princess Grace Hospital Center, Monaco, Monaco.; Institut de Physique de Nice, Côte d'Azur University, Parc Valrose, Nice, France.
Amblard R; Medical Physics Department, Princess Grace Hospital Center, Monaco, Monaco.
Villeneuve R; Medical Physics Department, Princess Grace Hospital Center, Monaco, Monaco.
Haykal R; Medical Physics Department, Princess Grace Hospital Center, Monaco, Monaco.
Ortholan C; Radiotherapy Department, Princess Grace Hospital Center, Monaco, Monaco.
Colin P; Radiotherapy Department, Princess Grace Hospital Center, Monaco, Monaco.
Gérard A; Medical Physics Department, Centre Antoine Lacassagne, Nice, France.
Belhomme S; Medical Physics Department, Institut Bergonié, Bordeaux, France.
Mady F; Institut de Physique de Nice, Côte d'Azur University, Parc Valrose, Nice, France.
Benabdesselam M; Institut de Physique de Nice, Côte d'Azur University, Parc Valrose, Nice, France.
Serrano B; Medical Physics Department, Princess Grace Hospital Center, Monaco, Monaco.
Źródło:
Journal of applied clinical medical physics [J Appl Clin Med Phys] 2018 Nov; Vol. 19 (6), pp. 88-98. Date of Electronic Publication: 2018 Sep 14.
Typ publikacji:
Journal Article
Język:
English
Imprint Name(s):
Publication: 2017- : Malden, MA : Wiley on behalf of American Association of Physicists in Medicine
Original Publication: Reston, VA : American College of Medical Physics, c2000-
MeSH Terms:
Monte Carlo Method*
Phantoms, Imaging*
Neoplasms/*surgery
Particle Accelerators/*instrumentation
Radiosurgery/*methods
Radiotherapy Planning, Computer-Assisted/*methods
Algorithms ; Computer Simulation ; Humans ; Radiotherapy Dosage ; Radiotherapy, Intensity-Modulated/methods
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Grant Information:
Scientific Center of Monaco
Contributed Indexing:
Keywords: Monte Carlo; beam profiles; detectors; output factor; percent depth dose; stereotactic cone
Entry Date(s):
Date Created: 20180915 Date Completed: 20190306 Latest Revision: 20190306
Update Code:
20240104
PubMed Central ID:
PMC6236831
DOI:
10.1002/acm2.12449
PMID:
30216702
Czasopismo naukowe
The purpose of this work is to assess eight detectors performance for output factor (OF), percent depth dose (PDD), and beam profiles in a 6-MV Clinac stereotactic radiosurgery mode for cone irradiation using Monte Carlo simulation as reference. Cones with diameters comprised between 30 and 4 mm have been studied. The evaluated detectors were ionization chambers: pinpoint and pinpoint 3D, diodes: SRS, P and E, Edge, MicroDiamond and EBT3 radiochromic films. The results showed that pinpoints underestimate OF up to -2.3% for cone diameters ≥10 mm and down to -12% for smaller cones. Both nonshielded (SRS and E) and shielded diodes (P and Edge) overestimate the OF respectively up to 3.3% and 5.2% for cone diameters ≥10 mm and in both cases more than 7% for smaller cones. MicroDiamond slightly overestimates the OF, 3.7% for all the cones and EBT3 film is the closest to Monte Carlo with maximum difference of ±1% whatever the cone size is. For the profiles and the PDD, particularly for the small cones, the size of the detector predominates. All diodes and EBT3 agree with the simulation within ±0.2 mm for beam profiles determination. For PDD curve all the active detectors response agree with simulation up to 1% for all the cones. EBT3 is the more accurate detector for beam profiles and OF determinations of stereotactic cones but it is restrictive to use. Due to respectively inappropriate size of the sensitive volume and composition, pinpoints and diodes do not seem appropriate without OF corrective factors below 10 mm diameter cone. MicroDiamond appears to be the best detector for OF determination regardless all cones. For off-axis measurements, the size of the detector predominates and for PDD all detectors give promising results.
(© 2018 The Authors. Journal of Applied Clinical Medical Physics published by Wiley Periodicals, Inc. on behalf of American Association of Physicists in Medicine.)

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