Calibration and evaluation of neutron survey meters used at linac facility

Salgado, Ana Paula; Pereira, Walsan Wagner; Fonseca, Evaldo Simões da; Patrão, K C S; Batista, Delano V. S.

doi:10.1016/j.radmeas.2010.06.033

Cited by 3 publications

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References 3 publications

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“…A study conducted by A.P. Salgado et al also showed that the dose rate increases with increase of the delivered dose [13]. 4 show the variations of dose rate as a function of field size(s).…”

Section: Neutron Dose Rate As a Function Of Delivered Dosementioning

confidence: 89%

“…The measurements were taken for three positions; which are 100 cm from isocenter, at the entrance of the maze, just inside and outside the door. From this study it is obvious that the dose rate is lower inside the maze entrance and inside and outside of the door than at 100 cm from isocenter [13]. Duong et al investigated neutron dose rate for different field sizes at various locations within and outside of a 15 MV Siemens Primus M5497 electron accelerator treatment vault using a neutron survey meter.…”

Section: Introductionmentioning

confidence: 96%

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Measurements of photoneutron dose rate for 15 MV photon beam from medical linear accelerator using neutron survey meter

Musfika,

Jamil,

Siddiqua

et al. 2023

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High-energy medical linear accelerators (>10MV) are increasingly used in the medical field to treat cancer patients depending on the treatment organ and patient physic. Medical linear accelerators (Linacs) operating above 10 MV photon beam produce unwanted neutrons (photoneutron) by means of photonuclear reaction (γ, n) between bremsstrahlung photon beams and constituent materials of Linac head. This study involved the measurement of the neutron dose rate from photon beam of medical linear accelerator (Elekta Synergy) operated at 15 MV photon. For the measurement of dose rate, a neutron survey meter LB 6411 probe was used. Neutron dose rate was obtained as a function of delivered dose, field size and detector position. In the study neutron dose rate was found 13.14 mSv/h at a field size of 10 × 10 cm2 at position (0,90,0) cm for 350 cGy and 9.26 mSv/h at 5 × 5 cm2 field size at position (0,80,0) cm for 200 cGy photon dose delivery. The dose rate varied with respect to detector position in an irregular manner; 2.95 mSv/h at position (-100,0,0) cm -on the side of maze entrance and 4.85 mSv/h at position (100,0,0) cm -off side of maze entrance.

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Section: Neutron Dose Rate As a Function Of Delivered Dosementioning

confidence: 89%

Section: Introductionmentioning

confidence: 96%