Dosimetric Impact of Interfraction Catheter Movement in High-Dose Rate Prostate Brachytherapy

Foster, William; Cunha, J. Adam M.; Hsu, I-Chow; Weinberg, Vivan; Krishnamurthy, Devan; Pouliot, Jean

doi:10.1016/j.ijrobp.2010.01.016

Cited by 37 publications

(12 citation statements)

References 21 publications

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“…A variety of methods have been used to estimate interfraction motion in prostate HDR [16,54] and the subsequent impact on rectum dose parameters for prostate brachytherapy [54,[63][64][65]. Simnor et at.…”

Section: Inter-fraction Motion Should Be Consideredmentioning

confidence: 99%

Prostate external beam radiotherapy combined with high-dose-rate brachytherapy: dose-volume parameters from deformably-registered plans correlate with late gastrointestinal complications

et al. 2016

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Background: Derivation of dose-volume correlated with toxicity for multi-modal treatments can be difficult due to the perceived need for voxel-by-voxel dose accumulation. With data available for a single-institution cohort with long follow-up, an investigation was undertaken into rectal dose-volume effects for gastrointestinal toxicities after deformably-registering each phase of a combined external beam radiotherapy (EBRT)/high-dose-rate (HDR) brachytherapy prostate treatment.

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Section: Inter-fraction Motion Should Be Consideredmentioning

confidence: 99%

Prostate external beam radiotherapy combined with high-dose-rate brachytherapy: dose-volume parameters from deformably-registered plans correlate with late gastrointestinal complications

et al. 2016

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“…Furthermore, HDR BT is often delivered via multiple fractions per implant (13). Between fractions the catheters can shift relative to the prostate (14e21) resulting in uncertainty in the delivered dose (22,23). Using intraoperative ultrasound (US) images to identify the catheters and determine the dose distribution for each fraction allows the patient to remain in the same position for catheter implantation, imaging, and treatment (24,25), increasing the accuracy with which dose can be delivered.…”

Section: Introductionmentioning

confidence: 99%

Intraoperative ultrasound-based planning can effectively replace postoperative CT-based planning for high-dose-rate brachytherapy for prostate cancer

et al. 2016

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“…This could produce the spatial dose distribution that conform to the speci c shape of the target and minimize the doses to OARs, but also lead to extremely high dose regions. A few investigators have noticed that this had the potential risk of inducing toxicity if there is a displacement of the catheters [36][37][38]. The displacement of a large dwell time apparently has a greater effect on the treatment plan than if dwell time differences were not so signi cant.…”

Section: Discussionmentioning

confidence: 99%

Comparison of Two Inverse Planning Algorithms for Cervical Cancer Brachytherapy

Zuo

et al. 2020

Preprint

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Purpose: To compare two methods, the hybrid inverse planning optimization (HIPO) algorithm and the inverse planning simulated annealing (IPSA) algorithm, for cervical cancer brachytherapy and provide suggestions for their usage.Material and methods: This study consisted of 24 cervical cancer patients treated with CT image-based high-dose-rate brachytherapy using various combinations of tandem/ovoid applicator and interstitial needles. For fixed catheter configurations, plans were retrospectively optimized with two methods: IPSA and HIPO. The dosimetric parameters with respect to target coverage, localization of high dose volume (LHDV), conformal index (COIN), and sparing of organs at risk (OARs) were evaluated. A plan assessment method which combines a graphical analysis and a scoring index was used to compare the quality of two plans for each case. The characteristics of dwell time distributions of the two plans were also analyzed.Results: Both IPSA and HIPO can produce clinically acceptable treatment plans. The rectum D2cc was slightly lower for HIPO as compared to IPSA (p=0.002). All other dosimetric parameters for targets and OARs were not significantly different between the two algorithms. The generated radar plots and scores intuitively presented the plan properties and enabled to reflect the clinical priorities for the treatment plans. Different characteristics were observed between the dwell time distributions generated by IPSA and HIPO. Conclusions: Despite significant difference in dwell time distributions, both the two algorithms could generate high-quality treatment plans. With the help of the plan assessment method, the clinical decision on the optimal plan can be made quickly and consistently for each patient.

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Dosimetric Impact of Interfraction Catheter Movement in High-Dose Rate Prostate Brachytherapy

Cited by 37 publications

References 21 publications

Prostate external beam radiotherapy combined with high-dose-rate brachytherapy: dose-volume parameters from deformably-registered plans correlate with late gastrointestinal complications

Prostate external beam radiotherapy combined with high-dose-rate brachytherapy: dose-volume parameters from deformably-registered plans correlate with late gastrointestinal complications

Intraoperative ultrasound-based planning can effectively replace postoperative CT-based planning for high-dose-rate brachytherapy for prostate cancer

Comparison of Two Inverse Planning Algorithms for Cervical Cancer Brachytherapy

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