A Monte Carlo study of the effect of an ultrasound transducer on surface dose during intrafraction motion imaging for external beam radiation therapy

Martyn, Michael; O’Shea, Tuathan; Harris, Emma; Bamber, Jeffrey C.; Gilroy, Stephen; Foley, Mark

doi:10.1002/mp.12464

Cited by 6 publications

(3 citation statements)

References 36 publications

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“…Clinical application of the four-dimensional (4D) TPUS Clarity â system (Elekta AB Stockholm, Sweden) as a form of non-invasive imaging modality for localising the prostate gland and monitoring its motion during radiotherapy have been widely explored and validated. [1][2][3][4][5][6][7][8] The importance of probe placement for optimal transperineal ultrasound (TPUS) images for the purpose of image-guided radiotherapy (IGRT) workflow in prostate radiotherapy was previously emphasised by Grimwood et al 1 We aim to provide recommendations and technical guidelines for the placement of TPUS probe for patients undergoing prostate radiotherapy. The associated implementation process, achievements and challenges will also be described.…”

Section: Purposementioning

confidence: 99%

Technical considerations for positioning and placement of a transperineal ultrasound probe during prostate radiotherapy

Pang

Knight

Leung

et al. 2020

J of Medical Radiation Sci

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This technical evaluation aims to provide practice 'how to' guidelines for radiation therapists (RTs) when positioning a transperineal ultrasound (TPUS) probe during prostate radiotherapy. Recommendations and practical tips will be provided for the best practice in TPUS-guided workflow to obtain optimal ultrasound images for accurate interpretation and registration of the prostate gland. This will assist the RTs in making consistent and accurate clinical decision in an ultrasound-guided radiotherapy workflow for prostate treatment. The implementation process and the associated successes and challenges will also be described to assist institutions who may be investigating the potential of implementing this system.

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Section: Purposementioning

confidence: 99%

Technical considerations for positioning and placement of a transperineal ultrasound probe during prostate radiotherapy

Pang

Knight

Leung

et al. 2020

J of Medical Radiation Sci

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“…Martyn et al [ 78 ] also investigated the effect of an US probe on the surface dose delivered to a phantom using a Monte Carlo study. In this study, a phantom was imaged using an Elekta Autoscan probe parallel to the radiation beam to mimic TAUS imaging, or perpendicular to the beam, to mimic TPUS imaging.…”

Section: Challengesmentioning

confidence: 99%

The Use of Ultrasound Imaging in the External Beam Radiotherapy Workflow of Prostate Cancer Patients

Camps

Fontanarosa

Verhaegen

et al. 2018

BioMed Research International

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External beam radiotherapy (EBRT) is one of the curative treatment options for prostate cancer patients. The aim of this treatment option is to irradiate tumor tissue, while sparing normal tissue as much as possible. Frequent imaging during the course of the treatment (image guided radiotherapy) allows for determination of the location and shape of the prostate (target) and of the organs at risk. This information is used to increase accuracy in radiation dose delivery resulting in better tumor control and lower toxicity. Ultrasound imaging is harmless for the patient, it is cost-effective, and it allows for real-time volumetric organ tracking. For these reasons, it is an ideal technique for image guidance during EBRT workflows. Review papers have been published in which the use of ultrasound imaging in EBRT workflows for different cancer sites (prostate, breast, etc.) was extensively covered. This new review paper aims at providing the readers with an update on the current status for prostate cancer ultrasound guided EBRT treatments.

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“…The contribution of Cerenkov radiation to the signal generated by the detector was also investigated 3 . Monte Carlo (MC) modelling in our group has so far focused predominantly on linear accelerator treatment head modelling in megavoltage applications from a variety of vendors, including Siemens [5][6][7][8] , Varian 9,10 and Elekta [11][12][13] .…”

Section: Introductionmentioning

confidence: 99%

Novel inorganic scintillating detectors and their applications in small animal irradiators: measurements and Monte Carlo simulations

Byrne

Alharbi

O'Keeffe

et al. 2020

Optical Sensing and Detection VI

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In the field of radiation therapy, optical fiber dosimeters (OFD) offer several advantages over conventional dosimeters for real-time dosimetry. Their sensing tips can be small in size affording them the potential for high spatial resolution capabilities. In previous work, a novel inorganic scintillating detector (ISD) based on Gadolinium Oxysulfide (gadox) was fabricated for in vivo optical fiber dosimetry of conformal small animal irradiators. The performance of this detector was evaluated for 40 and 80 kVp imaging beams and the 220 kVp therapy beam of the Small Animal Research Platform (SARRP). The purpose of this study was to use a validated Monte Carlo (MC) model of the SARRP to investigate (i) dose absorption in the ISD active volume and (ii) dose perturbation by the inorganic scintillating phosphor volume. A comparison was also drawn between the perturbation by the gadox phosphor and a ZnS-based phosphor. The gadox-based detector was seen to cause high levels of dose perturbation in the radiation field, leaving significant dose shadows in the irradiated media. The use of ZnS:Ag phosphor reduces the perturbations with just over half as much dose absorbed relative to the gadox phosphor. An optimized ISD design which utilizes the higher light yield of the less perturbing ZnS:Ag phosphor to allow for a smaller high-density active volume, and significantly mitigating kV dose perturbation, has been proposed.

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A Monte Carlo study of the effect of an ultrasound transducer on surface dose during intrafraction motion imaging for external beam radiation therapy

Cited by 6 publications

References 36 publications

Technical considerations for positioning and placement of a transperineal ultrasound probe during prostate radiotherapy

Technical considerations for positioning and placement of a transperineal ultrasound probe during prostate radiotherapy

The Use of Ultrasound Imaging in the External Beam Radiotherapy Workflow of Prostate Cancer Patients

Novel inorganic scintillating detectors and their applications in small animal irradiators: measurements and Monte Carlo simulations

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