MRI-LINAC beam profile measurements using a plastic scintillation dosimeter.

Madden, Levi; Archer, James; Li, Enbang; Jelen, Urszula; Dong, Bin; Holloway, Lois; Rosenfeld, Anatoly B.

doi:10.1016/j.ejmp.2020.04.016

Cited by 7 publications

(4 citation statements)

References 26 publications

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“…In all presented PDDs, the PSD underestimated the doses between surface and 15 mm when compared with film. In the presented setup, the spatial resolution of the PSD was 1.8 mm [22]. The underestimation by the PSD in the near surface region is systematic, and most significant in the largest field sizes.…”

Section: Discussionmentioning

confidence: 83%

“…In previous works, an in-house plastic scintillation dosimeter (PSD) was evaluated for its performance in the measurement of output factors [21] and beam profiles [22]. In these studies, the PSDs performance was comparable to the performance of other trusted dosimeters for MRI-LINACs, including a Farmer ionisation chamber and diamond detector for output factor measurements [21], and radiochromic film for beam profiles [22]. In this work, the in-house PSD was used to measure percentage depth dose (PDD) curves, compared with radiochromic film and a Farmer ionisation chamber.…”

Section: Introductionmentioning

confidence: 99%

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In-line MRI-LINAC depth dose measurements using an in-house plastic scintillation dosimeter

Madden¹,

Roberts²,

Jelen³

et al. 2021

Biomed. Phys. Eng. Express

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Plastic scintillation dosimeters (PSDs) have many properties that make them desirable for relative dosimetry with MRI-LINACs. An in-house PSD, Farmer ionisation chamber and Gafchromic EBT3 film were used to measure central axis percentage depth dose distributions (PDDs) at the Australian MRI-LINAC Mean errors were calculated between each detector’s responses, where the in-house PSD was on average within 0.7% of the Farmer chamber and 1.4% of film, while the Farmer chamber and film were on average within 1.1% of each other. However, the PSD systematically over-estimated the dose as depth increased, approaching a maximum overestimation of the order of 3.5% for the smallest field size measured. This trend was statistically insignificant for all other field sizes measured; further investigation is required to determine the source of this effect. The calculated values of mean absolute error are comparable to the those of trusted dosimeters reported in the literature. These mean absolute errors, and the ubiquity of desirable dosimetric qualities inherent to PSDs suggest that PSDs in general are accurate for relative dosimetry with the MRI-LINAC. Further investigation is required into the source of the reported systematic trends dependent on field-size and depth of measurement.

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Section: Discussionmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

In-line MRI-LINAC depth dose measurements using an in-house plastic scintillation dosimeter

Madden¹,

Roberts²,

Jelen³

et al. 2021

Biomed. Phys. Eng. Express

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“…The bene�it of such solid-state detectors increases even further for measurements in MR-linacs where the presence of a strong magnetic �ield (e.g. 0.35 T or 1.5 T) can lead to additional perturbation of the electron �luence if the detector density deviates from that of water [1][2][3]. Another signi�icant feature of �iber-coupled plastic scintillators is that they do not the disturb MR imaging [4,5].…”

Section: Introductionmentioning

confidence: 99%

On the use of Al₂O₃:C and plastic scintillators for small-field dosimetry in MR-linacs

Andersen,

Klavsen,

Ankjærgaard

2024

J. Phys.: Conf. Ser.

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Fiber coupled luminescence detectors based on organic plastic scintillators or inorganic materials such as Al2O3:C are suitable for dosimetry in strong magnetic fields as found in MR-linacs. The main finding of this work was that field-output factor measurements at the maximum dose point are less variable than if measured at the central beam axis (CAX). In contrast to plastic scintillators, Al2O3:C was found to have a yield of radioluminescence per dose that (within uncertainty) is independent of the magnetic field strength.

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“…Plastic dosimeters represent an important role in radiation applications [1][2][3][4][5]. They have been used in a variety of applications, such as portal monitors [6], solar radiation [7], radiation attenuation [8], cosmic radiation [9], UV radiation [10], thermal radiation [11] and gamma radiation [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Plastic bottle caps as radiation detectors for high gamma radiation doses

Oliveira¹,

Nascimento²,

Antonio³

et al. 2022

Braz. J. Rad. Sci.

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Dosimetric evaluation is indicated for material characterization seeking to identify possible applications; still, proper preprocessing techniques are critical features of this process. This work aimed to determine the linearity response of plastic samples irradiated with gamma rays using the Fourier Transform Infrared (FTIR) measurements. The plastic samples were analyzed using Derivatives and Principal Component Analysis (PCA) methods. They applied linear and Principal Component Regression (PCR) methods to obtain linearity. The methods obtained good results for linearity and also showed the evolution of each technique. In conclusion, the results indicate that the applied methods can be useful in radiation physics and for plastic samples as interesting potential radiation detectors.

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MRI-LINAC beam profile measurements using a plastic scintillation dosimeter.

Abstract: MRI-LINAC beam profile measurements using a plastic scintillation MRI-LINAC beam profile measurements using a plastic scintillation dosimeter. dosimeter.

Cited by 7 publications

References 26 publications

In-line MRI-LINAC depth dose measurements using an in-house plastic scintillation dosimeter

In-line MRI-LINAC depth dose measurements using an in-house plastic scintillation dosimeter

On the use of Al₂O₃:C and plastic scintillators for small-field dosimetry in MR-linacs

Plastic bottle caps as radiation detectors for high gamma radiation doses

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MRI-LINAC beam profile measurements using a plastic scintillation dosimeter.

Abstract: MRI-LINAC beam profile measurements using a plastic scintillation MRI-LINAC beam profile measurements using a plastic scintillation dosimeter. dosimeter.

Cited by 7 publications

References 26 publications

In-line MRI-LINAC depth dose measurements using an in-house plastic scintillation dosimeter

In-line MRI-LINAC depth dose measurements using an in-house plastic scintillation dosimeter

On the use of Al2O3:C and plastic scintillators for small-field dosimetry in MR-linacs

Plastic bottle caps as radiation detectors for high gamma radiation doses

Contact Info

Product

Resources

About

On the use of Al₂O₃:C and plastic scintillators for small-field dosimetry in MR-linacs