1
|
Jafarzadeh H, Antaki M, Mao X, Duclos M, Maleki F, Enger SA. Penalty weight tuning in high dose rate brachytherapy using multi-objective Bayesian optimization. Phys Med Biol 2024; 69:115024. [PMID: 38670145 DOI: 10.1088/1361-6560/ad4448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Accepted: 04/26/2024] [Indexed: 04/28/2024]
Abstract
Objective.Treatment plan optimization in high dose rate brachytherapy often requires manual fine-tuning of penalty weights for each objective, which can be time-consuming and dependent on the planner's experience. To automate this process, this study used a multi-criteria approach called multi-objective Bayesian optimization with q-noisy expected hypervolume improvement as its acquisition function (MOBO-qNEHVI).Approach.The treatment plans of 13 prostate cancer patients were retrospectively imported to a research treatment planning system, RapidBrachyMTPS, where fast mixed integer optimization (FMIO) performs dwell time optimization given a set of penalty weights to deliver 15 Gy to the target volume. MOBO-qNEHVI was used to find patient-specific Pareto optimal penalty weight vectors that yield clinically acceptable dose volume histogram metrics. The relationship between the number of MOBO-qNEHVI iterations and the number of clinically acceptable plans per patient (acceptance rate) was investigated. The performance time was obtained for various parameter configurations.Main results.MOBO-qNEHVI found clinically acceptable treatment plans for all patients. With increasing the number of MOBO-qNEHVI iterations, the acceptance rate grew logarithmically while the performance time grew exponentially. Fixing the penalty weight of the tumour volume to maximum value, adding the target dose as a parameter, initiating MOBO-qNEHVI with 25 parallel sampling of FMIO, and running 6 MOBO-qNEHVI iterations found solutions that delivered 15 Gy to the hottest 95% of the clinical target volume while respecting the dose constraints to the organs at risk. The average acceptance rate for each patient was 89.74% ± 8.11%, and performance time was 66.6 ± 12.6 s. The initiation took 22.47 ± 7.57 s, and each iteration took 7.35 ± 2.45 s to find one Pareto solution.Significance.MOBO-qNEHVI combined with FMIO can automatically explore the trade-offs between treatment plan objectives in a patient specific manner within a minute. This approach can reduce the dependency of plan quality on planner's experience and reduce dose to the organs at risk.
Collapse
Affiliation(s)
- Hossein Jafarzadeh
- Medical Physics Unit, Department of Oncology, McGill University, Montreal, Quebec, Canada
| | - Majd Antaki
- Medical Physics Unit, Department of Oncology, McGill University, Montreal, Quebec, Canada
| | - Ximeng Mao
- mila-Quebec AI Institute, Montréal, Quebec, Canada
| | - Marie Duclos
- McGill University Health Center, Montreal, Canada
| | - Farhard Maleki
- Department of Computer Science, University of Calgary, Calgary, AB, Canada
| | - Shirin A Enger
- Medical Physics Unit, Department of Oncology, McGill University, Montreal, Quebec, Canada
- mila-Quebec AI Institute, Montréal, Quebec, Canada
- Lady Davis Institute for Medical Research, Montreal, Quebec, Canada
| |
Collapse
|
2
|
Correa RJM, Loblaw A. Stereotactic Body Radiotherapy: Hitting Harder, Faster, and Smarter in High-Risk Prostate Cancer. Front Oncol 2022; 12:889132. [PMID: 35875062 PMCID: PMC9301671 DOI: 10.3389/fonc.2022.889132] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 05/31/2022] [Indexed: 11/30/2022] Open
Abstract
Stereotactic body radiotherapy (SBRT) is a technologically sophisticated form of radiotherapy that holds significant potential to effectively treat high-risk prostate cancer (HRPC). Prostate SBRT has been the subject of intense investigation in the context of low- and intermediate-risk disease, but less so for HRPC. However, emerging data are demonstrating its potential to safely and efficiently delivery curative doses of radiotherapy, both to the prostate and elective lymph nodes. SBRT theoretically hits harder through radiobiological dose escalation facilitated by ultra-hypofractionation (UHRT), faster with only five treatment fractions, and smarter by using targeted, focal dose escalation to maximally ablate the dominant intraprostatic lesion (while maximally protecting normal tissues). To achieve this, advanced imaging modalities like magnetic resonance imaging and prostate specific membrane antigen positron emmission tomography (PSMA-PET) are leveraged in combination with cutting-edge radiotherapy planning and delivery technology. In this focused narrative review, we discuss key evidence and upcoming clinical trials evaluating SBRT for HRPC with a focus on dose escalation, elective nodal irradiation, and focal boost.
Collapse
Affiliation(s)
- Rohann J. M. Correa
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Canada
- Department of Radiation Oncology, University of Toronto, Toronto, Canada
- Division of Radiation Oncology, Department of Oncology, Western University and London Health Sciences Centre, London, Canada
| | - Andrew Loblaw
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Canada
- Department of Radiation Oncology, University of Toronto, Toronto, Canada
- Department of Health Policy, Measurement and Evaluation, University of Toronto, Toronto, Canada
- *Correspondence: Andrew Loblaw,
| |
Collapse
|
3
|
Lecavalier-Barsoum M, Khosrow-Khavar F, Asiev K, Popovic M, Vuong T, Enger SA. Utilization of brachytherapy in Quebec, Canada. Brachytherapy 2021; 20:1282-1288. [PMID: 34420860 DOI: 10.1016/j.brachy.2021.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 06/20/2021] [Accepted: 07/05/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND AND PURPOSE Despite the excellent clinical outcomes from brachytherapy treatments compared with other modalities and the low associated costs, there have been reports of a decline in utilization of brachytherapy. The aim of this study was to investigate in detail the trend in utilization of brachytherapy in the province of Québec, Canada, from 2011 to 2019. MATERIALS AND METHODS All radiotherapy clinics in the province of Quebec, and among these the clinics that provide brachytherapy treatments, were identified. This observational retrospective cohort study involved analysis of data compiled by the Ministère de la Santé et des Services Sociaux du Québec for the period of 2011 to end of 2019 on all brachytherapy procedures performed in the province of Quebec. Time series graphs were used to describe the number of high dose rate (HDR) and low dose rate (LDR) brachytherapy treatments during the studied time period. Statistical analysis was conducted using R statistical software. RESULTS Between 2011 and 2019, 12 hospitals in the province of Québec provided radiotherapy treatments, and all of them offered brachytherapy services. The median annual number of brachytherapy sessions was 4413 (range 3930-4829). HDR brachytherapy represented over 90% of all brachytherapy treatments throughout the study period. Significant changes over time were observed in the number of treatments: at least 5% change was seen only for the two most common subtypes of brachytherapy, HDR interstitial and HDR intracavitary, with an increase of 9.6% and a decrease of 9.2%, respectively. The use of other subtypes of brachytherapy (HDR-plesiotherapy, LDR-interstitial, LDR-intracavitary, LDR-eye plaque) was stable between 2011 and 2019, with ≤ 2.5% variation. CONCLUSION This study demonstrates an overall steady use of brachytherapy between 2011 and 2019 in Quebec. Brachytherapy offers numerous advantages for the treatment of diverse cancer sites. Although more sophisticated external beam radiotherapy treatments have emerged in the last decades, the precision and cost-effectiveness of brachytherapy remain unbeaten. To ensure the continued use and availability of brachytherapy, governments must put in place policies and regulations to that effect. Training and exposure of future health care professionals to brachytherapy within Quebec and Canada is essential to provide all patients the same access to this life saving modality.
Collapse
Affiliation(s)
- Magali Lecavalier-Barsoum
- Department of Oncology, Faculty of Medicine, McGill University, Montreal, Quebec, Canada; Department of Radiation Oncology, Jewish General Hospital, McGill, University, Montreal, Quebec, Canada.
| | - Farzin Khosrow-Khavar
- Department of Oncology, Faculty of Medicine, McGill University, Montreal, Quebec, Canada
| | - Krum Asiev
- Department of Oncology, Faculty of Medicine, McGill University, Montreal, Quebec, Canada; Department of Medical Physics, Jewish General Hospital, McGill University, Montreal, Québec, Canada
| | - Marija Popovic
- Department of Oncology, Faculty of Medicine, McGill University, Montreal, Quebec, Canada
| | - Te Vuong
- Department of Oncology, Faculty of Medicine, McGill University, Montreal, Quebec, Canada; Department of Radiation Oncology, Jewish General Hospital, McGill, University, Montreal, Quebec, Canada
| | - Shirin A Enger
- Department of Oncology, Faculty of Medicine, McGill University, Montreal, Quebec, Canada; Department of Medical Physics, Jewish General Hospital, McGill University, Montreal, Québec, Canada.; Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec, Canada
| |
Collapse
|
4
|
Mori K, Sasaki H, Tsutsumi Y, Sato S, Takiguchi Y, Saito S, Nishi E, Ishii G, Yamamoto T, Koike Y, Miki J, Shimomura T, Kimura T, Miki K, Shariat SF, Takahashi H, Aoki M, Egawa S. Trimodal therapy with high-dose-rate brachytherapy and hypofractionated external beam radiation combined with long-term androgen deprivation for unfavorable-risk prostate cancer. Strahlenther Onkol 2021; 197:976-985. [PMID: 33909100 PMCID: PMC8547210 DOI: 10.1007/s00066-021-01784-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Accepted: 03/30/2021] [Indexed: 11/25/2022]
Abstract
Purpose To assess the outcomes of high-dose-rate (HDR) brachytherapy and hypofractionated external beam radiation therapy (EBRT) combined with long-term androgen deprivation therapy (ADT) in very-high-risk (VHR) versus high-risk (HR) prostate cancer (PCa), as defined in the National Comprehensive Cancer Network (NCCN) criteria. Methods Data from 338 consecutive HR or VHR PCa patients who had undergone this tri-modal therapy between 2005 and 2018 were retrospectively analyzed. Biochemical recurrence (BCR)-free, progression-free, overall, and cancer-specific survival (BCRFS/PFS/OS/CSS) rates were analyzed using the Kaplan–Meier method and Wilcoxon test. Cox regression models were used to evaluate candidate prognostic factors for survival. C‑indexes were used to assess model discrimination. Results Within a median follow-up of 84 months, 68 patients experienced BCR, 58 had disease progression including only 3 with local progression, 27 died of any cause, and 2 died from PCa. The 5‑year BCRFS, PFS, OS, and CSS rates were 82.2% (HR 86.5%; VHR 70.0%), 90.0% (HR 94.3%; VHR 77.6%), 95.7% (HR, 97.1%; VHR, 91.8%), and 99.6% (HR, 100%; VHR, 98.0%), respectively. In multivariable analyses that adjusted for standard clinicopathologic features, the risk subclassification was associated both PFS and OS (p = 0.0003 and 0.001, respectively). Adding the risk subclassification improved the accuracy of models in predicting BCRFS, PFS, and OS. Conclusion While the outcome of this trimodal approach appears favorable, VHR PCa patients had significantly worse oncological outcomes than those with HR PCa. The NCCN risk subclassification should be integrated into prognostic tools to guide risk stratification, treatment, and follow-up for unfavorable PCa patients receiving this trimodal therapy. Supplementary Information The online version of this article (10.1007/s00066-021-01784-3) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Keiichiro Mori
- Department of Urology, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, 105-8461, Tokyo, Japan. .,Department of Urology, Medical University of Vienna, Vienna, Austria.
| | - Hiroshi Sasaki
- Department of Urology, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, 105-8461, Tokyo, Japan
| | - Yuki Tsutsumi
- Department of Radiology, The Jikei University School of Medicine, Tokyo, Japan
| | - Shun Sato
- Department of Pathology, The Jikei University School of Medicine, Tokyo, Japan
| | - Yuki Takiguchi
- Department of Urology, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, 105-8461, Tokyo, Japan
| | - Shun Saito
- Department of Urology, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, 105-8461, Tokyo, Japan
| | - Eriko Nishi
- Department of Urology, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, 105-8461, Tokyo, Japan
| | - Gen Ishii
- Department of Urology, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, 105-8461, Tokyo, Japan
| | - Toshihiro Yamamoto
- Department of Urology, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, 105-8461, Tokyo, Japan
| | - Yusuke Koike
- Department of Urology, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, 105-8461, Tokyo, Japan
| | - Jun Miki
- Department of Urology, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, 105-8461, Tokyo, Japan
| | - Tatsuya Shimomura
- Department of Urology, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, 105-8461, Tokyo, Japan
| | - Takahiro Kimura
- Department of Urology, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, 105-8461, Tokyo, Japan
| | - Kenta Miki
- Department of Urology, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, 105-8461, Tokyo, Japan
| | - Shahrokh F Shariat
- Department of Urology, Medical University of Vienna, Vienna, Austria.,Karl Landsteiner Institute of Urology and Andrology, Vienna, Austria.,Division of Urology, Department of Special Surgery, The University of Jordan, Amman, Jordan.,Department of Urology, Weill Cornell Medical College, New York, NY, USA.,Department of Urology, University of Texas Southwestern, Dallas, TX, USA.,Department of Urology, Second Faculty of Medicine, Charles University, Prague, Czech Republic.,Institute for Urology and Reproductive Health, I.M. Sechenov First Moscow State Medical University, Moscow, Russian Federation.,European Association of Urology Research Foundation, Arnhem, The Netherlands
| | - Hiroyuki Takahashi
- Department of Pathology, The Jikei University School of Medicine, Tokyo, Japan
| | - Manabu Aoki
- Department of Radiology, The Jikei University School of Medicine, Tokyo, Japan
| | - Shin Egawa
- Department of Urology, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, 105-8461, Tokyo, Japan
| |
Collapse
|
5
|
Hoskin PJ, Rojas AM, Ostler PJ, Bryant L, Lowe GJ. Randomised trial of external-beam radiotherapy alone or with high-dose-rate brachytherapy for prostate cancer: Mature 12-year results. Radiother Oncol 2020; 154:214-219. [PMID: 33011207 DOI: 10.1016/j.radonc.2020.09.047] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 09/22/2020] [Accepted: 09/28/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND AND PURPOSE A randomised phase-III trial compared external beam radiotherapy (EBRT) alone with EBRT combined with high-dose-rate brachytherapy boost (HDR-BTb) in localised prostate adenocarcinoma. Previous analysis, at median follow up of 85 months, demonstrated improved relapse free survival (RFS) with EBRT + HDR-BTb. This data has now been updated with a median follow up of 131 months. MATERIALS AND METHODS From December 1997 to August 2005, patients were assigned either to EBRT alone delivering 55 Gy in 20 fractions over 4 weeks or EBRT followed by a temporary high-dose-rate implant delivering 2 × 8·5 Gy over 24 h. The primary endpoint was RFS defined by a PSA rise ≥2.0 µg/l above nadir, clinical progression or death. Actuarial survival rates and Hazard Ratios (HRs) were calculated using the Kaplan-Meier method and Cox's Proportional Hazard Model, respectively. Secondary endpoints were overall survival (OS), urinary and bowel toxicity. RESULTS One hundred and six patients received EBRT alone and 110 EBRT + HDR-BTb. Median time to relapse was 137 months in the HDR-BTb arm compared to 82 months for EBRT alone (p = 0·01). A 27% risk of recurrence with EBRT alone was observed (p = 0·001), resulting in a 21% improvement in RFS at 12 years with EBRT + HDR-BTb. In multivariate analysis treatment arm, risk category and no androgen deprivation therapy were significant covariates for risk of relapse. Differences in overall survival were not significant. CONCLUSION At 12 years there remains a significant improvement in RFS after EBRT + HDR-BTb; both treatments were equitoxic for severe late urinary and bowel events and urethral strictures.
Collapse
Affiliation(s)
- Peter J Hoskin
- Cancer Centre, Mount Vernon Hospital, Northwood, UK; University of Manchester, UK.
| | - Ana M Rojas
- Cancer Centre, Mount Vernon Hospital, Northwood, UK
| | | | - Linda Bryant
- Cancer Centre, Mount Vernon Hospital, Northwood, UK
| | - Gerry J Lowe
- Cancer Centre, Mount Vernon Hospital, Northwood, UK
| |
Collapse
|