Dose mapping of the rectal wall during brachytherapy with an array of scintillation dosimeters

Cartwright, L.; Suchowerska, Natalka; Yin, Y.; Lambert, J.; Haque, Md. Mahmudul; McKenzie, David R.

doi:10.1118/1.3397446

Cited by 41 publications

(48 citation statements)

References 21 publications

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“…A treatment error would be declared if the source position in the fluoroscopy image snapshot would not agree with the treatment plan. The same error detection principle for source localization has also been suggested for a pinhole camera, 88 an array of fibrecoupled scintillators 20 and imaging with 192 Ir photons. 89 Optimal error detection criterion In BT, the relative magnitudes of measurement and positional uncertainties depend on the source-to-detector distance.…”

Section: This Error Detection Technique Was Proposed By Sheikh-baghermentioning

confidence: 99%

“…Occasional IVD feasibility studies have also been conducted in some clinics. [12][13][14][15][16][17][18][19][20][21][22][23][24] However, routine implementations of IVD for error detection monitoring and QA of the BT treatments is yet to come. One reason for this may be that the cost vs benefit relation of IVD is not established and that robust IVD systems that do not leave a significant footprint on the treatment workflow are not commercially available.…”

Section: Treatment Errors In Btmentioning

confidence: 99%

“…Cartwright et al 20 developed a plastic endorectal applicator made of 16 individual plastic scintillator BrachyFOD™ detectors forming a two-dimensional array along the surface of the applicator. The applicator also incorporated radio-opaque markers to facilitate dosemeter reconstruction based on radiographs.…”

Section: Novel Dosimetry Technology Multipoint Dosemetersmentioning

confidence: 99%

See 2 more Smart Citations

In vivodosimetry: trends and prospects for brachytherapy

Kertzscher¹,

Rosenfeld²,

Beddar³

et al. 2014

BJR

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The error types during brachytherapy (BT) treatments and their occurrence rates are not well known. The limited knowledge is partly attributed to the lack of independent verification systems of the treatment progression in the clinical workflow routine. Within the field of in vivo dosimetry (IVD), it is established that real-time IVD can provide efficient error detection and treatment verification. However, it is also recognized that widespread implementations are hampered by the lack of available high-accuracy IVD systems that are straightforward for the clinical staff to use. This article highlights the capabilities of the state-of-the-art IVD technology in the context of error detection and quality assurance (QA) and discusses related prospects of the latest developments within the field. The article emphasizes the main challenges responsible for the limited practice of IVD and provides descriptions on how they can be overcome. Finally, the article suggests a framework for collaborations between BT clinics that implemented IVD on a routine basis and postulates that such collaborations could improve BT QA measures and the knowledge about BT error types and their occurrence rates.

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Section: This Error Detection Technique Was Proposed By Sheikh-baghermentioning

confidence: 99%

Section: Treatment Errors In Btmentioning

confidence: 99%

Section: Novel Dosimetry Technology Multipoint Dosemetersmentioning

confidence: 99%

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In vivodosimetry: trends and prospects for brachytherapy

Kertzscher¹,

Rosenfeld²,

Beddar³

et al. 2014

BJR

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“…Many groups have investigated the development of real-time detectors that can be inserted in catheters or anatomical orifices, and various types of detectors have been used (MOSFETs, RL/OSLDs, diodes, plastic scintillators). 3,5,6,[16][17][18][19][20][21][22][23] However, most of these detectors are limited to a single point of measurement, thereby limiting the number of dose measurements that can be performed simultaneously within a spatially constrained region (e.g., in a catheter).…”

Section: Introductionmentioning

confidence: 99%

“…18,[24][25][26] Water equivalence, response in nanoseconds, submillimetric size, linear response to dose, and independence of the response to energy above ∼100 keV and independence to dose rate are among the advantages. Cartwright et al 16 developed a system composed of 16 detectors, but that system required one optical guide per point of measurement and was 20 mm in diameter, which limited its application to a few anatomical sites (e.g., rectum). The theoretical and practical feasibility of developing a multipoint plastic scintillation detector (mPSD) that uses only a single collection optical guide was demonstrated recently for high-energy external beam radiation therapy.…”

Section: Introductionmentioning

confidence: 99%

On the use of a single‐fiber multipoint plastic scintillation detector for ¹⁹²Ir high‐dose‐rate brachytherapy

2013

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Purpose: The goal of this study was to prove the feasibility of using a single-fiber multipoint plastic scintillation detector (mPSD) as an in vivo verification tool during 192 Ir high-dose-rate brachytherapy treatments. Methods: A three-point detector was built and inserted inside a catheter-positioning template placed in a water phantom. A hyperspectral approach was implemented to discriminate the different optical signals composing the light output at the exit of the single collection optical fiber. The mPSD was tested with different source-to-detector positions, ranging from 1 to 5 cm radially and over 10.5 cm along the longitudinal axis of the detector, and with various integration times. Several strategies for improving the accuracy of the detector were investigated. The device's accuracy in detecting source position was also tested. Results: Good agreement with the expected doses was obtained for all of the scintillating elements, with average relative differences from the expected values of 3.4 ± 2.1%, 3.0 ± 0.7%, and 4.5 ± 1.0% for scintillating elements from the distal to the proximal. A dose threshold of 3 cGy improved the general accuracy of the detector. An integration time of 3 s offered a good trade-off between precision and temporal resolution. Finally, the mPSD measured the radioactive source positioning uncertainty to be no more than 0.32 ± 0.06 mm. The accuracy and precision of the detector were improved by a dose-weighted function combining the three measurement points and known details about the geometry of the detector construction. Conclusions: The use of a mPSD for high-dose-rate brachytherapy dosimetry is feasible. This detector shows great promise for development of in vivo applications for real-time verification of treatment delivery.

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Radioluminescence Dosimetry in Modern Radiation Therapy

Darafsheh,

Goddu,

Williamson

et al. 2024

Advanced Photonics Research

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Accurate and precise measurement of radiation energy delivered to and absorbed by the patient's tissue is of great importance in radiation therapy (RT) quality assurance. Radioluminescence (RL) dosimetry has shown great potential for high spatiotemporal resolution dose measurement of RT fields. Implementation of efficient RL dosimetry in RT requires multidisciplinary effort and skills in optics, medical physics, radiation physics, electronics, and imaging science. In this review, a wide overview of fundamentals and applications of RL properties of media for RT dosimetry with emphasis on their potential use for multidimensional, small‐field, and ultra‐high dose rate RT dosimetry is provided.

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Dose mapping of the rectal wall during brachytherapy with an array of scintillation dosimeters

Cited by 41 publications

References 21 publications

In vivodosimetry: trends and prospects for brachytherapy

In vivodosimetry: trends and prospects for brachytherapy

On the use of a single‐fiber multipoint plastic scintillation detector for ¹⁹²Ir high‐dose‐rate brachytherapy

Radioluminescence Dosimetry in Modern Radiation Therapy

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Dose mapping of the rectal wall during brachytherapy with an array of scintillation dosimeters

Cited by 41 publications

References 21 publications

In vivodosimetry: trends and prospects for brachytherapy

In vivodosimetry: trends and prospects for brachytherapy

On the use of a single‐fiber multipoint plastic scintillation detector for 192Ir high‐dose‐rate brachytherapy

Radioluminescence Dosimetry in Modern Radiation Therapy

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Product

Resources

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On the use of a single‐fiber multipoint plastic scintillation detector for ¹⁹²Ir high‐dose‐rate brachytherapy