In vivo dosimetry in gynecological applications—A feasibility study

Gellekom, Marion P.R. Van; Canters, R.; Dankers, Frank J. W. M.; Loopstra, A.; Steen-Banasik, Elzbieta M. van der; Haverkort, Marie A.D.

doi:10.1016/j.brachy.2017.04.240

Cited by 13 publications

(6 citation statements)

References 14 publications

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“…In our previous study images acquired after treatment showed on average ~2% dose reduction at MOSFET position due to the tendency for the posterior row of needles to drop [4]. The correction for MOSFET energy dependent response is assumed to be linear with distance, however a recent study by Van Gellekom et al [14] found that at 5mm distance the MOSFET relative response changes non-linearly which if correct would reduce the predicted readings in our study, however it is very difficult to accurately measure the relative response at small distances due to the dose gradient around the source. A further possible explanation for measuring systematically low is limitation in the accuracy of planning on ultrasound in terms of reconstruction accuracy.…”

Section: Which Needles Are Outside the Error Detection Threshold?mentioning

confidence: 94%

Error detection thresholds for routine real time in vivo dosimetry in HDR prostate brachytherapy

Mason

Henry

Bownes³

2020

Radiotherapy and Oncology

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Section: Which Needles Are Outside the Error Detection Threshold?mentioning

confidence: 94%

Error detection thresholds for routine real time in vivo dosimetry in HDR prostate brachytherapy

Mason

Henry

Bownes³

2020

Radiotherapy and Oncology

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“…Kertzscher et al 117 published a review paper in 2014, covering many aspects of the use of IVD in brachytherapy. Recently, a feasibility study for IVD in gynecological applications has been published by Van Gellekom et al 118 . They evaluate differences between measured and predicted doses to verify the applicator configuration with the Utrecht Interstitial Fletcher applicators.…”

Section: Recent and Future Prospectsmentioning

confidence: 99%

Review of strategies for MRI based reconstruction of endocavitary and interstitial applicators in brachytherapy of cervical cancer

Richart

Carmona-Meseguer²,

García-Martinez

et al. 2018

Reports of Practical Oncology & Radiotherapy

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Another strategy to improve the reconstruction process is based on the incorporation of MR markers, such as small pellets, to be used as anchor points. Many institutions employ computed tomography (CT) as a supporting image modality. The registration of CT and MR image sets should be carefully performed, and its uncertainty previously assessed. Besides, an important research work is being carried out regarding the use of ultrasound and electromagnetic tracking technologies.

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“…One of the problems associated with internal in vivo dosimetry in brachytherapy, which is characterised by a high dose gradient, is the size of the detector. It must be: (1) of small size to minimise the effects of dose averaging detection on a volume as much as possible, and (2) compatible with the thin interstitial catheters of the most common brachytherapy applications including prostate [ 8 , 9 ], vaginal-cuff brachytherapy (VCBT), and other gynaecological sites such as cervical cancer [ 10 , 11 , 12 ]. The use of different in vivo dosimetry systems such as inorganic scintillator detectors, plastic scintillator detectors (PSD), and microMOSFET among others, has been extensively described [ 9 , 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

In Vivo Verification of Treatment Source Dwell Times in Brachytherapy of Postoperative Endometrial Carcinoma: A Feasibility Study

Herreros

Pérez‐Calatayud

Ballester

et al. 2022

JPM

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(1) Background: In brachytherapy, there are still many manual procedures that can cause adverse events which can be detected with in vivo dosimetry systems. Plastic scintillator dosimeters (PSD) have interesting properties to achieve this objective such as real-time reading, linearity, repeatability, and small size to fit inside brachytherapy catheters. The purpose of this study was to evaluate the performance of a PSD in postoperative endometrial brachytherapy in terms of source dwell time accuracy. (2) Methods: Measurements were carried out in a PMMA phantom to characterise the PSD. Patient measurements in 121 dwell positions were analysed to obtain the differences between planned and measured dwell times. (3) Results: The repeatability test showed a relative standard deviation below 1% for the measured dwell times. The relative standard deviation of the PSD sensitivity with accumulated absorbed dose was lower than 1.2%. The equipment operated linearly in total counts with respect to absorbed dose and also in count rate versus absorbed dose rate. The mean (standard deviation) of the absolute differences between planned and measured dwell times in patient treatments was 0.0 (0.2) seconds. (4) Conclusions: The PSD system is useful as a quality assurance tool for brachytherapy treatments.

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In vivo dosimetry in gynecological applications—A feasibility study

Cited by 13 publications

References 14 publications

Error detection thresholds for routine real time in vivo dosimetry in HDR prostate brachytherapy

Error detection thresholds for routine real time in vivo dosimetry in HDR prostate brachytherapy

Review of strategies for MRI based reconstruction of endocavitary and interstitial applicators in brachytherapy of cervical cancer

In Vivo Verification of Treatment Source Dwell Times in Brachytherapy of Postoperative Endometrial Carcinoma: A Feasibility Study

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