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Romano A, Votta C, Nardini M, Chiloiro G, Panza G, Boldrini L, Cusumano D, Galofaro E, Placidi L, Antonelli MV, Turco G, Autorino R, Gambacorta MA. Uterus motion analysis for radiotherapy planning optimization. The innovative contribution of on-board hybrid MR imaging. Clin Transl Radiat Oncol 2024; 47:100808. [PMID: 39005509 PMCID: PMC11239475 DOI: 10.1016/j.ctro.2024.100808] [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: 12/21/2023] [Revised: 05/31/2024] [Accepted: 06/13/2024] [Indexed: 07/16/2024] Open
Abstract
Introduction Organ motion (OM) and volumetric changes pose challenges in radiotherapy (RT) for locally advanced cervical cancer (LACC). Magnetic Resonance-guided Radiotherapy (MRgRT) combines improved MRI contrast with adaptive RT plans for daily anatomical changes. Our goal was to analyze cervico-uterine structure (CUS) changes during RT to develop strategies for managing OM. Materials and methods LACC patients received chemoradiation by MRIdian system with a simultaneous integrated boost (SIB) protocol. Prescription doses of 55-50.6 Gy at PTV1 and 45-39.6 Gy at PTV2 were given in 22 and 25 fractions. Daily MRI scans were co-registered with planning scans and CUS changes were assessed.Six PTVs were created by adding 0.5, 0.7, 1, 1.3, 1.5, and 2 cm margins to the CUS, based on the simulation MRI. Adequate margins were determined to include 95 % of the CUSs throughout the entire treatment in 95 % of patients. Results Analysis of 15 LACC patients and 372 MR scans showed a 31 % median CUS volume decrease. Asymmetric margins of 2 cm cranially, 0.5 cm caudally, 1.5 cm posteriorly, 2 cm anteriorly, and 1.5 cm on both sides were optimal for PTV, adapting to CUS variations. Post-14th fraction, smaller margins of 0.7 cm cranially, 0.5 cm caudally, 1.3 cm posteriorly, 1.3 cm anteriorly, and 1.3 cm on both sides sufficed. Conclusion CUS mobility varies during RT, suggesting reduced PTV margins after the third week. MRgRT with adaptive strategies optimizes dose delivery, emphasizing the importance of streamlined IGRT with reduced PTV margins using a tailored MRgRT workflow with hybrid MRI-guided systems.
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Affiliation(s)
- Angela Romano
- Fondazione Policlinico Universitario "Agostino Gemelli" IRCCS, Largo Agostino Gemelli 8, 00168 Rome, Italy
| | - Claudio Votta
- Fondazione Policlinico Universitario "Agostino Gemelli" IRCCS, Largo Agostino Gemelli 8, 00168 Rome, Italy
| | - Matteo Nardini
- Fondazione Policlinico Universitario "Agostino Gemelli" IRCCS, Largo Agostino Gemelli 8, 00168 Rome, Italy
| | - Giuditta Chiloiro
- Fondazione Policlinico Universitario "Agostino Gemelli" IRCCS, Largo Agostino Gemelli 8, 00168 Rome, Italy
| | - Giulia Panza
- Fondazione Policlinico Universitario "Agostino Gemelli" IRCCS, Largo Agostino Gemelli 8, 00168 Rome, Italy
| | - Luca Boldrini
- Fondazione Policlinico Universitario "Agostino Gemelli" IRCCS, Largo Agostino Gemelli 8, 00168 Rome, Italy
| | - Davide Cusumano
- Mater Olbia Hospital, Strada Statale Orientale Sarda 125, 07026 Olbia, Italy
| | - Elena Galofaro
- Azienda Ospedaliero Universitaria delle Marche, Via Conca 71, 60126, Ancona, Italy
| | - Lorenzo Placidi
- Fondazione Policlinico Universitario "Agostino Gemelli" IRCCS, Largo Agostino Gemelli 8, 00168 Rome, Italy
| | - Marco Valerio Antonelli
- Fondazione Policlinico Universitario "Agostino Gemelli" IRCCS, Largo Agostino Gemelli 8, 00168 Rome, Italy
| | - Gabriele Turco
- Fondazione Policlinico Universitario "Agostino Gemelli" IRCCS, Largo Agostino Gemelli 8, 00168 Rome, Italy
| | - Rosa Autorino
- Fondazione Policlinico Universitario "Agostino Gemelli" IRCCS, Largo Agostino Gemelli 8, 00168 Rome, Italy
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Ghosh S, Gurram L, Kumar A, Mulye G, Mittal P, Chopra S, Kharbanda D, Hande V, Ghadi Y, Scaria L, Dheera A, Varghese GB, Kole S, Ansari S, Mahantshetty U, Agarwal JP. Clinical Implementation of "Plan of the Day" Strategy in Definitive Radiation Therapy of Cervical Cancer: Online Adaptation to Address the Challenge of Organ Filling Reproducibility. Int J Radiat Oncol Biol Phys 2024; 118:605-615. [PMID: 37816473 DOI: 10.1016/j.ijrobp.2023.09.045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 09/13/2023] [Accepted: 09/19/2023] [Indexed: 10/12/2023]
Abstract
PURPOSE Definitive pelvic intensity modulated radiation therapy (IMRT) in cervical cancer is susceptible to geographic miss due to daily positional and volumetric variations in target and organs at risk. Hence, despite evidence of reduced acute and late treatment-related toxicities, implementation of image-guided IMRT (IG-IMRT) with a reasonable safety margin to encompass organ motion is challenging. METHODS AND MATERIALS In this prospective, nonrandomized phase 2 study, patients with cervical cancer International Federation of Gynecology and Obstetrics (2009) stage IB2-IIIB between the ages of 18 and 65 years were treated with definitive pelvic chemoradiotherapy with a prespecified organ (bladder and rectum) filling protocol. Reproducibility of organ filling was assessed along with the implementation of daily comprehensive adaptive image-guided radiotherapy (IGRT), with a library of 3 IMRT (volumetric modulated arc therapy) plans with incremental expansions of clinical target volume (CTV) to planning target volume (PTV) (primary) margins (small, 0.7 cm; adequate, 1 cm; and large, 1.5 cm) and a backup motion robust 3-dimensional conformal radiotherapy plan; the appropriate plan is chosen based on pretreatment cone beam computed tomography (CBCT) ("plan of the day" approach). RESULTS Fifty patients with a median age of 49 years (IQR, 45-56 years) received definitive radiation therapy (45-46 Gy in 23-25 fractions to pelvis, with simultaneous integrated boost to gross nodes in 15 patients) with the aforementioned IGRT protocol. In the analysis of 1171 CBCT images (in 1184 treatment sessions), the mean planning computed tomography (CT) and CBCT bladder volumes were 417 and 373 cc, respectively. Significant interfractional variation in bladder volume was noted with a mean absolute dispersion of 29.5% with respect to planning CT; significant influential random factors were postchemotherapy sessions (P ≤ .001), pre-CBCT protocol duration (P = .001), and grades of chemotherapy induced nausea vomiting (P = .001). Significantly higher variation in bladder filling was noted in patients with older age (P = .014) and larger planning CT bladder volume (P ≤ .001). Time trend analysis of fraction-wise bladder volume revealed an absolute systemic reduction of 16.3% in bladder volume means from the first to the fifth week. Variation in rectal diameter was much less pronounced, with 19.2% mean dispersion and without any significant factors affecting it. Although in 19% and 2% of sessions large IMRT PTV and 3-dimensional conformal radiotherapy were necessary to cover the primary target, respectively, reduction in treated volume was possible in 43% of sessions with small PTV selection instead of standard adequate PTV (36% sessions). Plan of the day selection had a moderate to strong correlation with nonabsolute dispersion of bladder filling (Spearman ρ =0.4; P = .001) and a weak (but significant) correlation with grades of acute toxicities. The planned protocol was well tolerated with no radiation-induced local grade 3 toxicity. CONCLUSIONS Interfractional variation in organ filling (especially bladder) is inevitable despite fixed pretreatment protocol in definitive settings (intact cervix). Despite the logistical challenges, adaptive IGRT in the form of plan of the day based on incremental CTV-to-PTV margins is a relatively simple and feasible strategy to minimize geometric uncertainties in radical IG-IMRT of cervical cancer.
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Affiliation(s)
- Suman Ghosh
- Department of Radiation Oncology, Tata Memorial Hospital, Tata Memorial Centre, Homi Bhabha National Institute, Parel, Mumbai, Maharashtra, India
| | - Lavanya Gurram
- Department of Radiation Oncology, Tata Memorial Hospital, Tata Memorial Centre, Homi Bhabha National Institute, Parel, Mumbai, Maharashtra, India.
| | - Amrendra Kumar
- Department of Radiation Oncology, Tata Memorial Hospital, Tata Memorial Centre, Homi Bhabha National Institute, Parel, Mumbai, Maharashtra, India
| | - Gargee Mulye
- Department of Radiation Oncology, Tata Memorial Hospital, Tata Memorial Centre, Homi Bhabha National Institute, Parel, Mumbai, Maharashtra, India
| | - Prachi Mittal
- Department of Radiation Oncology, Tata Memorial Hospital, Tata Memorial Centre, Homi Bhabha National Institute, Parel, Mumbai, Maharashtra, India
| | - Supriya Chopra
- Department of Radiation Oncology, Tata Memorial Hospital, Tata Memorial Centre, Homi Bhabha National Institute, Parel, Mumbai, Maharashtra, India
| | - Disha Kharbanda
- Department of Radiation Oncology, Indraprastha Apollo Hospital, New Delhi, India
| | - Vinod Hande
- Department of Radiation Oncology, Tata Memorial Hospital, Tata Memorial Centre, Homi Bhabha National Institute, Parel, Mumbai, Maharashtra, India
| | - Yogesh Ghadi
- Department of Radiation Physics, Tata Memorial Hospital, Tata Memorial Centre, Homi Bhabha National Institute, Parel, Mumbai, Maharashtra, India
| | - Libin Scaria
- Department of Radiation Physics, Tata Memorial Hospital, Tata Memorial Centre, Homi Bhabha National Institute, Parel, Mumbai, Maharashtra, India
| | - A Dheera
- Department of Radiation Physics, Tata Memorial Hospital, Tata Memorial Centre, Homi Bhabha National Institute, Parel, Mumbai, Maharashtra, India
| | - George Biju Varghese
- Department of Radiation Physics, Tata Memorial Hospital, Tata Memorial Centre, Homi Bhabha National Institute, Parel, Mumbai, Maharashtra, India
| | - Satish Kole
- Department of Radiation Physics, Tata Memorial Hospital, Tata Memorial Centre, Homi Bhabha National Institute, Parel, Mumbai, Maharashtra, India
| | - Sahebuzzama Ansari
- Department of Radiation Physics, Tata Memorial Hospital, Tata Memorial Centre, Homi Bhabha National Institute, Parel, Mumbai, Maharashtra, India
| | - Umesh Mahantshetty
- Homi Bhabha Cancer Hospital, Visakhapatnam, Tata Memorial Centre, Homi Bhabha National Institute, Parel, Mumbai, Maharashtra, India
| | - Jai Prakash Agarwal
- Department of Radiation Oncology, Tata Memorial Hospital, Tata Memorial Centre, Homi Bhabha National Institute, Parel, Mumbai, Maharashtra, India
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Wang L, McQuaid D, Blackledge M, McNair H, Harris E, Lalondrelle S. Predicting cervical cancer target motion using a multivariate regression model to enable patient selection for adaptive external beam radiotherapy. Phys Imaging Radiat Oncol 2024; 29:100554. [PMID: 38419803 PMCID: PMC10901141 DOI: 10.1016/j.phro.2024.100554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 02/06/2024] [Accepted: 02/08/2024] [Indexed: 03/02/2024] Open
Abstract
Background and purpose Interfraction motion during cervical cancer radiotherapy is substantial in some patients, minimal in others. Non-adaptive plans may miss the target and/or unnecessarily irradiate normal tissue. Adaptive radiotherapy leads to superior dose-volume metrics but is resource-intensive. The aim of this study was to predict target motion, enabling patient selection and efficient resource allocation. Materials and methods Forty cervical cancer patients had CT with full-bladder (CT-FB) and empty-bladder (CT-EB) at planning, and daily cone-beam CTs (CBCTs). The low-risk clinical target volume (CTVLR) was contoured. Mean coverage of the daily CTVLR by the CT-FB CTVLR was calculated for each patient. Eighty-three investigated variables included measures of organ geometry, patient, tumour and treatment characteristics. Models were trained on 29 patients (171 fractions). The Two-CT multivariate model could use all available data. The Single-CT multivariate model excluded data from the CT-EB. A univariate model was trained using the distance moved by the uterine fundus tip between CTs, the only method of patient selection found in published cervix plan-of-the-day studies. Models were tested on 11 patients (68 fractions). Accuracy in predicting mean coverage was reported as mean absolute error (MAE), mean squared error (MSE) and R2. Results The Two-CT model was based upon rectal volume, dice similarity coefficient between CT-FB and CT-EB CTVLR, and uterine thickness. The Single-CT model was based upon rectal volume, uterine thickness and tumour size. Both performed better than the univariate model in predicting mean coverage (MAE 7 %, 7 % and 8 %; MSE 82 %2, 65 %2, 110 %2; R2 0.2, 0.4, -0.1). Conclusion Uterocervix motion is complex and multifactorial. We present two multivariate models which predicted motion with reasonable accuracy using pre-treatment information, and outperformed the only published method.
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Affiliation(s)
- Lei Wang
- The Joint Department of Physics at the Institute of Cancer Research and the Royal Marsden NHS Foundation Trust, Sutton, Surrey, UK
| | - Dualta McQuaid
- The Joint Department of Physics at the Institute of Cancer Research and the Royal Marsden NHS Foundation Trust, Sutton, Surrey, UK
| | - Matthew Blackledge
- The Joint Department of Physics at the Institute of Cancer Research and the Royal Marsden NHS Foundation Trust, Sutton, Surrey, UK
| | - Helen McNair
- The Joint Department of Physics at the Institute of Cancer Research and the Royal Marsden NHS Foundation Trust, Sutton, Surrey, UK
| | - Emma Harris
- The Joint Department of Physics at the Institute of Cancer Research and the Royal Marsden NHS Foundation Trust, Sutton, Surrey, UK
| | - Susan Lalondrelle
- The Joint Department of Physics at the Institute of Cancer Research and the Royal Marsden NHS Foundation Trust, Sutton, Surrey, UK
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Berger T, Godart J, Jagt T, Vittrup AS, Fokdal LU, Lindegaard JC, Kibsgaard Jensen NB, Zolnay A, Reijtenbagh D, Trnkova P, Tanderup K, Hoogeman M. Dosimetric Impact of Intrafraction Motion in Online-Adaptive Intensity Modulated Proton Therapy for Cervical Cancer. Int J Radiat Oncol Biol Phys 2021; 109:1580-1587. [PMID: 33227442 DOI: 10.1016/j.ijrobp.2020.11.037] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 10/23/2020] [Accepted: 11/12/2020] [Indexed: 11/28/2022]
Abstract
PURPOSE A method was recently developed for online-adaptive intensity modulated proton therapy (IMPT) in patients with cervical cancer. The advantage of this approach, relying on the use of tight margins, is challenged by the intrafraction target motion. The purpose of this study was to evaluate the dosimetric effect of intrafraction motion on the target owing to changes in bladder filling in patients with cervical cancer treated with online-adaptive IMPT. METHODS AND MATERIALS In 10 patients selected to have large uterus motion induced by bladder filling, the intrafraction anatomic changes were simulated for several prefraction durations for online (automated) contouring and planning. For each scenario, the coverage of the primary target was evaluated with margins of 2.5 and 5 mm. RESULTS Using a 5- mm planning target volume margin, median accumulated D98% was greater than 42.75 GyRBE1.1 (95% of the prescribed dose) in the case of a prefraction duration of 5 and 10 minutes. For a prefraction duration of 15 minutes, this parameter deteriorated to 42.6 GyRBE1.1. When margins were reduced to 2.5 mm, only a 5-minute duration resulted in median target D98% above 42.75 GyRBE1.1. In addition, smaller bladders were found to be associated with larger dose degradations compared with larger bladders. CONCLUSIONS This study indicates that intrafraction anatomic changes can have a substantial dosimetric effect on target coverage in an online-adaptive IMPT scenario for patients subject to large uterus motion. A margin of 5 mm was sufficient to compensate for the intrafraction motion due to bladder filling for up to 10 minutes of prefraction time. However, compensation for the uncertainties that were disregarded in this study, by using margins or robust optimization, is also required. Furthermore, a large bladder volume restrains intrafraction target motion and is recommended for treating patients in this scenario. Assuming that online-adaptive IMPT remains beneficial as long as narrow margins are used (5 mm or below), this study demonstrates its feasibility with regard to intrafraction motion.
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Affiliation(s)
- Thomas Berger
- Department of Oncology, Aarhus University Hospital, Aarhus, Denmark.
| | - Jérémy Godart
- Erasmus MC Cancer Institute, University Medical Center Rotterdam, Department of Radiotherapy, The Netherlands
| | - Thyrza Jagt
- Erasmus MC Cancer Institute, University Medical Center Rotterdam, Department of Radiotherapy, The Netherlands
| | | | | | | | | | - Andras Zolnay
- Erasmus MC Cancer Institute, University Medical Center Rotterdam, Department of Radiotherapy, The Netherlands
| | - Dominique Reijtenbagh
- Erasmus MC Cancer Institute, University Medical Center Rotterdam, Department of Radiotherapy, The Netherlands
| | - Petra Trnkova
- Erasmus MC Cancer Institute, University Medical Center Rotterdam, Department of Radiotherapy, The Netherlands; Holland PTC, Delft, The Netherlands
| | - Kari Tanderup
- Department of Oncology, Aarhus University Hospital, Aarhus, Denmark
| | - Mischa Hoogeman
- Erasmus MC Cancer Institute, University Medical Center Rotterdam, Department of Radiotherapy, The Netherlands; Holland PTC, Delft, The Netherlands
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Niyoteka S, Berger T, Fokdal LU, Petersen JBB, Zolnay A, Hoogeman M, Tanderup K, Nystrom HU. Impact of interfractional target motion in locally advanced cervical cancer patients treated with spot scanning proton therapy using an internal target volume strategy. PHYSICS & IMAGING IN RADIATION ONCOLOGY 2021; 17:84-90. [PMID: 33898784 PMCID: PMC8058016 DOI: 10.1016/j.phro.2021.01.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 01/23/2021] [Accepted: 01/28/2021] [Indexed: 01/08/2023]
Abstract
Background and purpose The more localized dose deposition of proton therapy (PT) compared to photon therapy might allow a reduction in treatment-related side effects but induces additional challenges to address. The aim of this study was to evaluate the impact of interfractional motion on the target and organs at risk (OARs) in cervical cancer patients treated with spot scanning PT using an internal target volume (ITV) strategy. Methods and materials For ten locally advanced cervical cancer patients, empty and full bladder planning computed tomography (pCT) as well as 25 daily cone beam CTs (CBCTs) were available. The Clinical Target Volume (CTV), the High Risk CTV (CTVHR) (gross tumor volume and whole cervix), the non-involved uterus as well as the OARs (bowel, bladder and rectum) were contoured on the daily CBCTs and transferred to the pCT through rigid bony match. Using synthetic CTs derived from pCTs, four-beam spot scanning PT plans were generated to target the patient-specific ITV with 45 Gy(RBE) in 25 fractions. This structure was defined based on pre-treatment MRI and CT to anticipate potential target motion throughout the treatment. D98% of the targets and V40Gy(RBE) of the OARs were extracted from the daily anatomies, accumulated and analyzed. In addition, the impact of bladder volume deviations from planning values on target and bowel dose was investigated. Results The ITV strategy ensured a total accumulated dose >42.75 Gy(RBE) to the CTVHR for all ten patients. Two patients with large bladder-related uterus motion had accumulated dose to the non-involved uterus of 35.7 Gy(RBE) and 41.1 Gy(RBE). Variations in bowel V40Gy(RBE) were found to be correlated (Pearson r = −0.55; p-value <0.0001) with changes in bladder volume during treatment. Conclusion The ITV concept ensured adequate dose to the CTVHR, but was insufficient for the non-involved uterus of patients subject to large target interfractional motion. CBCT monitoring and occasional replanning is recommended along the same lines as with photon radiotherapy in cervical cancer.
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Affiliation(s)
| | - Thomas Berger
- Department of Oncology, Aarhus University Hospital, Aarhus, Denmark
| | | | | | - Andras Zolnay
- Erasmus MC Cancer Institute, University Medical Center Rotterdam, Department of Radiotherapy, The Netherlands
| | - Mischa Hoogeman
- Erasmus MC Cancer Institute, University Medical Center Rotterdam, Department of Radiotherapy, The Netherlands
- Holland PTC, Delft, The Netherlands
| | - Kari Tanderup
- Department of Oncology, Aarhus University Hospital, Aarhus, Denmark
- Corresponding author.
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Utena Y, Takatsu J, Sugimoto S, Sasai K. Trajectory log analysis and cone-beam CT-based daily dose calculation to investigate the dosimetric accuracy of intensity-modulated radiotherapy for gynecologic cancer. J Appl Clin Med Phys 2021; 22:108-117. [PMID: 33426810 PMCID: PMC7882102 DOI: 10.1002/acm2.13163] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 11/13/2020] [Accepted: 12/15/2020] [Indexed: 11/21/2022] Open
Abstract
This study evaluated unexpected dosimetric errors caused by machine control accuracy, patient setup errors, and patient weight changes/internal organ deformations. Trajectory log files for 13 gynecologic plans with seven‐ or nine‐beam dynamic multileaf collimator (MLC) intensity‐modulated radiation therapy (IMRT), and differences between expected and actual MLC positions and MUs were evaluated. Effects of patient setup errors on dosimetry were estimated by in‐house software. To simulate residual patient setup errors after image‐guided patient repositioning, planned dose distributions were recalculated (blurred dose) after the positions were randomly moved in three dimensions 0–2 mm (translation) and 0°–2° (rotation) 28 times per patient. Differences between planned and blurred doses in the clinical target volume (CTV) D98% and D2% were evaluated. Daily delivered doses were calculated from cone‐beam computed tomography by the Hounsfield unit‐to‐density conversion method. Fractional and accumulated dose differences between original plans and actual delivery were evaluated by CTV D98% and D2%. The significance of accumulated doses was tested by the paired t test. Trajectory log file analysis showed that MLC positional errors were −0.01 ± 0.02 mm and MU delivery errors were 0.10 ± 0.10 MU. Differences in CTV D98% and D2% were <0.5% for simulated patient setup errors. Differences in CTV D98% and D2% were 2.4% or less between the fractional planned and delivered doses, but were 1.7% or less for the accumulated dose. Dosimetric errors were primarily caused by patient weight changes and internal organ deformation in gynecologic radiation therapy.
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Affiliation(s)
- Yohei Utena
- Department of Radiation Oncology, Graduate School of Medicine, Juntendo University, Tokyo, Japan.,Department of Radiology, Toranomon Hospital, Tokyo, Japan
| | - Jun Takatsu
- Department of Radiation Oncology, Faculty of Medicine, Juntendo University, Tokyo, Japan
| | - Satoru Sugimoto
- Department of Radiation Oncology, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Keisuke Sasai
- Department of Radiation Oncology, Graduate School of Medicine, Juntendo University, Tokyo, Japan
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K Jensen NB, Pötter R, Spampinato S, Fokdal LU, Chargari C, Lindegaard JC, Schmid MP, Sturdza A, Jürgenliemk-Schulz IM, Mahantshetty U, Segedin B, Bruheim K, Hoskin P, Rai B, Wiebe E, Cooper R, Van der Steen-Banasik E, Van Limbergen E, Sundset M, Pieters BR, Nout RA, Kirisits C, Kirchheiner K, Tanderup K. Dose-Volume Effects and Risk Factors for Late Diarrhea in Cervix Cancer Patients After Radiochemotherapy With Image Guided Adaptive Brachytherapy in the EMBRACE I Study. Int J Radiat Oncol Biol Phys 2020; 109:688-700. [PMID: 33068689 DOI: 10.1016/j.ijrobp.2020.10.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 09/30/2020] [Accepted: 10/06/2020] [Indexed: 02/07/2023]
Abstract
PURPOSE To evaluate patient- and treatment-related risk factors associated with incidence and persistence of late diarrhea after radiochemotherapy and image guided adaptive brachytherapy (IGABT) in locally advanced cervical cancer. MATERIALS AND METHODS Of 1416 patients from the EMBRACE I study, 1199 were prospectively evaluated using physician-reported (Common Terminology Criteria for Adverse Events version 3 [CTCAEv3]) assessment for diarrhea; median follow-up 48 months. Patient-reported outcome (EORTC) was available in 900 patients. Incidence of CTCAE G≥2, G≥3, and EORTC "very much" diarrhea was analyzed with Cox proportional hazards regression. Binary logistic regression was used for analysis of persistent G≥1 and EORTC "quite a bit" - "very much" (≥"quite a bit") diarrhea, defined if present in at least half of all follow-ups. RESULTS Crude incidences of G≥2 and G≥3 diarrhea were 8.3% and 1.5%, respectively, and 8% of patients reported "very much" diarrhea. Persistent G≥1 and ≥"quite a bit" diarrhea was present in 16% and 7%, respectively. Patient-related risk factors were baseline diarrhea, smoking, and diabetes with hazard ratios of 1.4 to 7.3. Treatment-related risk factors included prescribed dose, V43 Gy, V57 Gy (lymph node boost), and para-aortic irradiation for external beam radiation therapy (EBRT). G≥2 diarrhea at 3 years increased from 9.5% to 19.9% with prescribed dose 45 Gy versus 50 Gy, 8.7% to 14.0% with V43 Gy <2500 cm3 versus >3000 cm3 and 9.4% to 19.0% with V57 Gy <165 cm3 versus ≥165 cm3. Brachytherapy-related bowel and rectum D2cm3 were also associated with diarrhea. CONCLUSION Dose and volume effects have been established for late diarrhea after radiochemotherapy and IGABT in both CTCAE and EORTC reporting. The risk of diarrhea was lower with a pelvic EBRT prescription of 45 Gy, and higher with larger lymph node boosts volumes (ie, ≥165 cm3). The importance of EBRT volumes as determinants of late toxicity underline the need for continuous quality assurance of target contouring, dose planning, and conformity. The findings of brachytherapy dosimetric factors related to the intestines may become more important with highly conformal EBRT.
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Affiliation(s)
- Nina B K Jensen
- Department of Oncology, Aarhus University Hospital, Aarhus, Denmark.
| | - Richard Pötter
- Department of Radiation Oncology, Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria
| | - Sofia Spampinato
- Department of Oncology, Aarhus University Hospital, Aarhus, Denmark
| | - Lars U Fokdal
- Department of Oncology, Aarhus University Hospital, Aarhus, Denmark
| | - Cyrus Chargari
- Department of Radiotherapy, Gustave-Roussy, Villejuif, France
| | | | - Maximilian P Schmid
- Department of Radiation Oncology, Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria
| | - Alina Sturdza
- Department of Radiation Oncology, Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria
| | | | - Umesh Mahantshetty
- Department of Radiation Oncology, Tata Memorial Hospital, Mumbai, Homi Bhabha National Institute, India
| | - Barbara Segedin
- Department of Radiotherapy, Institute of Oncology Ljubljana, Ljubljana, Slovenia
| | - Kjersti Bruheim
- Department of Oncology, Oslo University Hospital, Oslo, Norway
| | - Peter Hoskin
- Mount Vernon Cancer Centre, Mount Vernon Hospital, Northwood, United Kingdom
| | - Bhavana Rai
- Department of Radiotherapy and Oncology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Ericka Wiebe
- Department of Oncology, Cross Cancer Institute and University of Alberta, Edmonton, Canada
| | - Rachel Cooper
- Leeds Cancer Centre, St James's University Hospital, Leeds, United Kingdom
| | | | - Erik Van Limbergen
- Department of Radiation Oncology, University Hospitals Leuven, Leuven, Belgium
| | - Marit Sundset
- Clinic of Oncology and Women's Clinic, St. Olavs Hospital, Trondheim, Norway
| | - Bradley R Pieters
- Department of Radiation Oncology, Amsterdam University Medical Centers, University of Amsterdam, The Netherlands
| | - Remi A Nout
- Department of Radiation Oncology, Leiden University Medical Center, Leiden, The Netherlands; Department of Radiotherapy, Erasmus MC Cancer Institute, University Medical Center, Rotterdam, the Netherlands
| | - Christian Kirisits
- Department of Radiation Oncology, Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria
| | - Kathrin Kirchheiner
- Department of Radiation Oncology, Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria
| | - Kari Tanderup
- Department of Oncology, Aarhus University Hospital, Aarhus, Denmark
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Taasti VT, Klages P, Parodi K, Muren LP. Developments in deep learning based corrections of cone beam computed tomography to enable dose calculations for adaptive radiotherapy. Phys Imaging Radiat Oncol 2020; 15:77-79. [PMID: 33458330 PMCID: PMC7807621 DOI: 10.1016/j.phro.2020.07.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Affiliation(s)
- Vicki Trier Taasti
- Department of Radiation Oncology (Maastro), GROW School for Oncology, Maastricht University Medical Centre+, Maastricht, The Netherlands
| | - Peter Klages
- Department of Medical Physics, Memorial Sloan Kettering Cancer Center, NY, USA
| | - Katia Parodi
- Department of Medical Physics – Experimental Physics, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Ludvig Paul Muren
- Department of Medical Physics/Oncology, Danish Centre for Particle Therapy, Aarhus University Hospital/Aarhus University, Denmark
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9
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Alexander S, Hopkins N, Lalondrelle S, Taylor A, Titmarsh K, McNair H. RTT-led IGRT for cervix cancer; training, implementation and validation. Tech Innov Patient Support Radiat Oncol 2019; 12:41-49. [PMID: 32095554 PMCID: PMC7033802 DOI: 10.1016/j.tipsro.2019.10.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 10/18/2019] [Accepted: 10/31/2019] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION IGRT in cervical cancer treatment delivery is complex due to significant target and organs at risk (OAR) motion. Implementing image assessment of soft-tissue target and OAR position to improve accuracy is recommended. We report the development and refinement of a training and competency programme (TCP), leading to on-line Radiation Therapist (RTT) led soft-tissue assessment, evaluated by a prospective audit. METHODS AND MATERIALS The TCP comprised didactic lectures and practical sessions, supported by a comprehensive workbook. The content was decided by a team comprised of Clinical Oncologists, RTTs, and Physicists. On completion of training, RTT soft-tissue review proficiency (after bony anatomy registration) was assessed against a clinician gold-standard from a database of 20 cervical cancer CBCT images. Reviews were graded pass or fail based on PTV coverage assessment and decision taken in concordance with the gold-standard. Parity was set at ≥80% agreement.The initial TCP (stage one) focussed on offline verification and decision making. Sixteen RTTs completed this stage, four achieved ≥80%. This was not sufficient to support clinical implementation.The TCP was redesigned, more stringent review guidelines and greater anatomy teaching was added. TCP stage two focussed on online verification and decision making supported by a decision flowchart. Twenty-one RTTs completed this TCP, all achieved ≥80%. This supported clinical implementation of RTT-led soft-tissue review under prospective audit conditions.The prospective audit was conducted between March 2017 and August 2017. Daily online review was performed by two trained RTTs. Online review and decision making proficiency was evaluated by a clinician. RESULTS Thirteen patients were included in the audit. Daily online RTT-led IGRT was achieved for all 343 fractions. Two-hundred CBCT images were reviewed offline by the clinician; the mean number of reviews per patient was 15. 192/200 (96%) RTT image reviews were in agreement with clinician review, presenting excellent concordance. DISCUSSION AND CONCLUSION Multidisciplinary involvement in training development, redesign of the TCP and inclusion of summative competency assessment were important factors to support RTT skill development. Consequently, RTT-led cervical cancer soft-tissue IGRT was clinically implemented in the hospital.
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Affiliation(s)
| | - N. Hopkins
- The Royal Marsden NHS Foundation Trust, United Kingdom
| | - S. Lalondrelle
- The Royal Marsden NHS Foundation Trust, United Kingdom
- The Institute of Cancer Research, United Kingdom
| | - A. Taylor
- The Royal Marsden NHS Foundation Trust, United Kingdom
- The Institute of Cancer Research, United Kingdom
| | - K. Titmarsh
- Formerly Kingston and St Georges University of London, United Kingdom
| | - H.A. McNair
- The Royal Marsden NHS Foundation Trust, United Kingdom
- The Institute of Cancer Research, United Kingdom
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10
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Thorwarth D. Imaging science and development in modern high-precision radiotherapy. Phys Imaging Radiat Oncol 2019; 12:63-66. [PMID: 33458297 PMCID: PMC7807660 DOI: 10.1016/j.phro.2019.11.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Affiliation(s)
- Daniela Thorwarth
- Section for Biomedical Physics, Department of Radiation Oncology, University of Tübingen, Germany
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11
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Berger T, Fokdal LU, Assenholt MS, Jensen NB, Petersen JB, Nyvang L, Korreman S, Lindegaard JC, Tanderup K. Robustness of elective lymph node target coverage with shrinking Planning Target Volume margins in external beam radiotherapy of locally advanced cervical cancer. Phys Imaging Radiat Oncol 2019; 11:9-15. [PMID: 33458270 PMCID: PMC7807569 DOI: 10.1016/j.phro.2019.06.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2019] [Revised: 06/06/2019] [Accepted: 06/06/2019] [Indexed: 01/23/2023] Open
Abstract
BACKGROUND AND PURPOSE Image-Guidance decreases set-up uncertainties, which may allow for Planning Target Volume (PTV) margins reduction. This study evaluates the robustness of the elective lymph node target coverage to translational and rotational set-up errors in combination with shrinking PTV margins and determines the gain for the Organs At Risk (OARs). MATERIAL AND METHODS Ten cervix cancer patients who underwent external beam radiotherapy with 45 Gy/25Fx were analysed. Daily Image-Guidance was based on bony registration of Cone Beam CT (CBCT) to planning CT (pCT) and daily couch correction (translation and yaw). On each pCT, four Volumetric Modulated Arc Therapy dose-plans were generated with PTV margins of 0, 3, 5 and 8 mm. The elective clinical target volume (CTV-E) was propagated from daily CBCTs to the pCT to evaluate daily CTV-E dose. Additional systematic translational isocenter shifts of 2 mm were simulated. D98% (dose received by 98% of the volume of interest) and D99.9% were extracted from each CTV-E for all dose-plans and scenarios. Total dose was accumulated by Dose-Volume Histogram addition. The dosimetric impact of PTV margin reduction on the OARs was evaluated through V30Gy (volume included within the 30 Gy isodose), V40Gy and body V43Gy. RESULTS When decreasing the PTV margin from 5 to 0 mm, bowel V30Gy was decreased by 13% (from 247 cm3 to 214 cm3), body V43Gy by 19% (from 1462 cm3 to 1188 cm3) and PTV by 39% (from 1416 to 870 cm3). The dosimetric impact of combined systematic shifts and residual rotations on the elective target with a 0 mm PTV margin was a decrease of D98% (mean ± SD) from 44.1 Gy ± 0.4 Gy to 43.7 Gy ± 0.8 Gy and a minimum of 42.4 Gy. CONCLUSION PTV margin reduction from 5 to 0 mm induced significant OARs dosimetric gains while elective target coverage remained robust to positioning uncertainties.
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Affiliation(s)
- Thomas Berger
- Department of Oncology, Aarhus University Hospital, Denmark
| | - Lars U. Fokdal
- Department of Oncology, Aarhus University Hospital, Denmark
| | | | | | | | - Lars Nyvang
- Department of Oncology, Aarhus University Hospital, Denmark
| | - Stine Korreman
- Department of Oncology, Aarhus University Hospital, Denmark
| | | | - Kari Tanderup
- Department of Oncology, Aarhus University Hospital, Denmark
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