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Wang K, Wang J, Jiang P. High-Dose-Rate Three-Dimensional Image-Guided Adaptive Brachytherapy (3D IGABT) for Locally Advanced Cervical Cancer (LACC): A Narrative Review on Imaging Modality and Clinical Evidence. Curr Oncol 2023; 31:50-65. [PMID: 38275830 PMCID: PMC10814120 DOI: 10.3390/curroncol31010004] [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: 11/22/2023] [Revised: 12/16/2023] [Accepted: 12/18/2023] [Indexed: 01/27/2024] Open
Abstract
Background: Brachytherapy (BT) is a critical component of radiotherapy for locally advanced cervical cancer (LACC), and it has rapidly developed in recent decades. Since the advent of three-dimensional image-guided adaptive brachytherapy (3D-IGABT), magnetic resonance imaging (MRI) has emerged as the primary modality for image guidance. Meanwhile, other imaging modalities, such as computed tomography, 18F-fluorodeoxyglucose positron emission tomography, ultrasound, and their combinations have also been widely studied. Materials and methods: We reviewed studies on different imaging modalities utilized for target delineation and planning. Emerging techniques in IGABT like real-time image guidance and 3D printing were also included. We summarized research on their feasibility and concentrated on their clinical outcomes. Results: MRI-guided BT was the gold standard, and CT-guided BT was the most widely applied. Other modalities have shown feasibility and promising efficacy in dosimetry studies and preliminary outcomes. The longer-term clinical outcomes associated with these approaches require further elucidation. Conclusions: As 3D-IGABT was validated by promising clinical outcomes, the future of BT for LACC is expected to progress toward the refinement of more effective image-guided procedures. Moreover, achieving operational consensus and driving technological advancements to mitigate the inherent limitations associated with different imaging modes remain essential.
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Affiliation(s)
| | | | - Ping Jiang
- Department of Radiation Oncology, Peking University Third Hospital, Beijing 100191, China; (K.W.); (J.W.)
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Zhang Z, Zhang N, Cheng G. Application of three-dimensional multi-imaging combination in brachytherapy of cervical cancer. LA RADIOLOGIA MEDICA 2023; 128:588-600. [PMID: 37138200 DOI: 10.1007/s11547-023-01632-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 04/12/2023] [Indexed: 05/05/2023]
Abstract
BACKGROUND Three-dimensional (3D) imaging has an important role in brachytherapy and the treatment of cervical cancer. The main imaging methods used in the cervical cancer brachytherapy include magnetic resonance imaging (MRI), computer tomography (CT), ultrasound (US), and positron emission tomography (PET). However, single-imaging methods have certain limitations compared to multi-imaging. The application of multi-imaging can make up for the shortcomings and provide a more suitable imaging selection for brachytherapy. PURPOSE This review details the situation and scope of existing multi-imaging combination methods in cervical cancer brachytherapy and provides a reference for medical institutions. MATERIALS AND METHODS Searched the literature related to application of three-dimensional multi-imaging combination in brachytherapy of cervical cancer in PubMed/Medline and Web of Science electronic databases. Summarized the existing combined imaging methods and the application of each method in cervical cancer brachytherapy. CONCLUSION The current imaging combination methods mainly include MRI/CT, US/CT, MRI/US, and MRI/PET. The combination of two imaging tools can be used for applicator implantation guidance, applicator reconstruction, target and organs at risk (OAR) contouring, dose optimization, prognosis evaluation, etc., which provides a more suitable imaging choice for brachytherapy.
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Affiliation(s)
- Zhaoming Zhang
- Department of Radiation Oncology, China-Japan Union Hospital of Jilin University, No.126 Xiantai Street, Changchun, China
| | - Ning Zhang
- Department of Radiation Oncology, China-Japan Union Hospital of Jilin University, No.126 Xiantai Street, Changchun, China
| | - Guanghui Cheng
- Department of Radiation Oncology, China-Japan Union Hospital of Jilin University, No.126 Xiantai Street, Changchun, China.
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Lu Q, Guo D, Wei Y, Zheng J, Li J. Role of gastrointestinal ultrasound in image-guided radiation therapy: A review. JOURNAL OF RADIATION RESEARCH AND APPLIED SCIENCES 2023. [DOI: 10.1016/j.jrras.2022.100520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Tharavichitkul E, M. Galalae R. Ultrasound-Guided Brachytherapy for Cervical Cancer - A Tool for Quality Improvement in Brachytherapy? Radiat Oncol 2022. [DOI: 10.5772/intechopen.101853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Nowadays, brachytherapy is one of the major components to treat inoperable cervical cancer. Brachytherapy yields a higher dose to the target (cervix) while sparing normal tissues. Developments of brachytherapy stepped forward in the previous decade by image-guided brachytherapy (IGBT) turning brachytherapy from point-based planning to volume-based planning and IGBT improves the treatment quality for cervical cancer. Magnetic resonance imaging (MRI) or computed tomography (CT) is utilized in brachytherapy and showed promising results internationally. However, in a limited-resource area, the implementation of IGABT is difficult due to many causes (manpower, equipment, or budgets). To improve the quality in limited resources, ultrasound is introduced. The utilization of ultrasound in brachytherapy practice is to prevent uterine perforation during application. With present data, measurement by ultrasound showed the correlation to MRI measurement in uterine dimensions. With these aspects, there are many researches using ultrasound to improve the quality of treatment in brachytherapy, for example, to guide contouring on CT or to support brachytherapy planning. The use of ultrasound improves the quality of brachytherapy in comparison to conventional planning and supports the improvement in brachytherapy for cervical cancer.
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Jacobsen MC, Beriwal S, Dyer BA, Klopp AH, Lee SI, McGinnis GJ, Robbins JB, Rauch GM, Sadowski EA, Simiele SJ, Stafford RJ, Taunk NK, Yashar CM, Venkatesan AM. Contemporary image-guided cervical cancer brachytherapy: Consensus imaging recommendations from the Society of Abdominal Radiology and the American Brachytherapy Society. Brachytherapy 2022; 21:369-388. [PMID: 35725550 DOI: 10.1016/j.brachy.2022.04.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 04/15/2022] [Accepted: 04/24/2022] [Indexed: 11/02/2022]
Abstract
PURPOSE To present recommendations for the use of imaging for evaluation and procedural guidance of brachytherapy for cervical cancer patients. METHODS An expert panel comprised of members of the Society of Abdominal Radiology Uterine and Ovarian Cancer Disease Focused Panel and the American Brachytherapy Society jointly assessed the existing literature and provide data-driven guidance on imaging protocol development, interpretation, and reporting. RESULTS Image-guidance during applicator implantation reduces rates of uterine perforation by the tandem. Postimplant images may be acquired with radiography, computed tomography (CT), or magnetic resonance imaging (MRI), and CT or MRI are preferred due to a decrease in severe complications. Pre-brachytherapy T2-weighted MRI may be used as a reference for contouring the high-risk clinical target volume (HR-CTV) when CT is used for treatment planning. Reference CT and MRI protocols are provided for reference. CONCLUSIONS Image-guided brachytherapy in locally advanced cervical cancer is essential for optimal patient management. Various imaging modalities, including orthogonal radiographs, ultrasound, computed tomography, and magnetic resonance imaging, remain integral to the successful execution of image-guided brachytherapy.
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Affiliation(s)
- Megan C Jacobsen
- The University of Texas MD Anderson Cancer Center, Department of Imaging Physics, Houston, TX
| | - Sushil Beriwal
- Allegheny Health Network, Department of Radiation Oncology, Pittsburgh, PA; Varian Medical Systems, Palo Alto, CA
| | - Brandon A Dyer
- Legacy Health, Department of Radiation Oncology, Portland, OR
| | - Ann H Klopp
- The University of Texas MD Anderson Cancer Center, Department of Radiation Oncology, Houston, TX
| | - Susanna I Lee
- Massachusetts General Hospital, Department of Radiology, Boston, MA
| | - Gwendolyn J McGinnis
- The University of Texas MD Anderson Cancer Center, Department of Radiation Oncology, Houston, TX
| | | | - Gaiane M Rauch
- The University of Texas MD Anderson Cancer Center, Department of Abdominal Imaging, Houston, TX
| | | | - Samantha J Simiele
- The University of Texas MD Anderson Cancer Center, Department of Radiation Physics, Houston, TX
| | - R Jason Stafford
- The University of Texas MD Anderson Cancer Center, Department of Imaging Physics, Houston, TX
| | - Neil K Taunk
- University of Pennsylvania, Department of Radiation Oncology, Philadelphia, PA
| | - Catheryn M Yashar
- University of California San Diego, Department of Radiation Oncology, San Diego, CA
| | - Aradhana M Venkatesan
- The University of Texas MD Anderson Cancer Center, Department of Abdominal Imaging, Houston, TX.
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van Dyk S, Khaw P, Lin MY, Chang D, Bernshaw D. Ultrasound-guided Brachytherapy for Cervix Cancer. Clin Oncol (R Coll Radiol) 2021; 33:e403-e411. [PMID: 33715936 DOI: 10.1016/j.clon.2021.02.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 02/19/2021] [Indexed: 11/17/2022]
Abstract
Radiotherapy and brachytherapy are the definitive treatments for locally advanced cervix cancer. The use of soft-tissue imaging, particularly magnetic resonance imaging, has enhanced their effectiveness and improved clinical outcomes. However, the use of magnetic resonance imaging is largely restricted to well-resourced centres in both the first and developing world and remains elusive to many less advantaged centres, particularly those in areas with a high burden of cervix cancer. Ultrasound is an accessible, affordable and accurate imaging modality that can be used throughout the brachytherapy procedure. Ultrasound is primarily used to ensure safe insertion of the applicator but can also be used to guide planning. The methods used to utilise ultrasound images for planning are described. Ultrasound is particularly useful as a verification aid to confirm applicator placement after patients are moved and transferred around the radiotherapy department. It can also be used to verify the dimensions of treatment volumes over the course of brachytherapy. There is a crucial unmet need for an accessible economical soft-tissue imaging modality in cervical brachytherapy. Ultrasound has the potential to meet this need.
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Affiliation(s)
- S van Dyk
- Radiation Therapy Services, Division of Radiation Oncology, Peter MacCallum Cancer Centre, Melbourne, Australia.
| | - P Khaw
- Division of Radiation Oncology, Peter MacCallum Cancer Centre, Melbourne, Australia; Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, Australia
| | - M-Y Lin
- Division of Radiation Oncology, Peter MacCallum Cancer Centre, Melbourne, Australia; Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, Australia
| | - D Chang
- Division of Radiation Oncology, Peter MacCallum Cancer Centre, Melbourne, Australia; Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, Australia
| | - D Bernshaw
- Division of Radiation Oncology, Peter MacCallum Cancer Centre, Melbourne, Australia; Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, Australia
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Application of transrectal ultrasound in guiding interstitial brachytherapy for advanced cervical cancer. J Contemp Brachytherapy 2020; 12:375-382. [PMID: 33293977 PMCID: PMC7690229 DOI: 10.5114/jcb.2020.98118] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 07/21/2020] [Indexed: 12/09/2022] Open
Abstract
Purpose To investigate the role of transrectal ultrasound guidance in interstitial brachytherapy for cervical cancer. Material and methods Forty-eight patients who underwent interstitial brachytherapy treatment for cervical cancer between January 2017 and January 2018 were enrolled in the study. The distances between each inserted needle and the lesion were measured at seven sites by ultrasound (D1-D7) and compared to the corresponding distances (M1-M7) when visualised with nuclear magnetic resonance imaging (MRI). Measurements were paired on the basis of the observation sites, e.g. D1 and M1, D2 and M2. The statistical differences, intraclass correlation coefficients (ICCs), and linear relationships for the paired measurements were calculated. Results No significant differences were found between the paired M and D measurements, with all ICCs showing high levels of concordance (0.81-0.93). Conclusions Transrectal ultrasound showed strong agreement with MRI results in determining the position of the inserted needles. Transrectal ultrasound is a useful tool for guided interstitial brachytherapy and is appropriate for widespread use in the treatment of locally advanced cervical cancer.
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8
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Lin Y, Cheng G, Shi D, Li H, Teng D, Zhao Z, Mao Z, Wang H. Clinical Application of Ultrasound Guidance for Parametrial Treatment of Advanced Cervical Cancer. JOURNAL OF ULTRASOUND IN MEDICINE : OFFICIAL JOURNAL OF THE AMERICAN INSTITUTE OF ULTRASOUND IN MEDICINE 2020; 39:1087-1095. [PMID: 31825130 DOI: 10.1002/jum.15189] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 11/01/2019] [Accepted: 11/17/2019] [Indexed: 05/21/2023]
Abstract
OBJECTIVES To evaluate the accuracy of ultrasound (US) in determining the positions of parametrial implants by comparing US with magnetic resonance imaging (MRI) for advanced cervical cancer. METHODS Patients undergoing brachytherapy with parametrial implantation for cervical cancer from February 2017 to February 2019 were involved in the study. The transverse section of the cervix (surface S1 ) and the transverse section 1 cm above the external cervix (surface S2 ) were selected from MRI and US images as the observation planes. In the MRI observation plane, the distances between the uterine titanium needles and the uterine tube/implanter were set as M1 to M4 ; in the US observation plane, the distances between the uterine titanium needles and the uterine tube/implanter were set as D1 to D4 . The differences and consistency in M and D of each group were then compared. RESULTS There were no significant differences between M and D in each group (P = .058; P = .821; P = .870; and P = .936, respectively). The intraclass correlation coefficients of M and D in each group were 0.970, 0.968, 0.952, and 0.956. A regression analysis showed that the relationships between M and D in each group were as follows: M1 = 0.9449D1 + 0.1812; M2 = 0.9463D2 + 0.0965; M3 = 0.9176D3 + 0.1233; and M4 = 0.9253D4 + 0.1224. CONCLUSIONS In parametrial brachytherapy for cervical cancer, US can accurately determine the positions of parametrial implantation needles, which is already applicable on MRI, and can provide assistance in parametrial brachytherapy for advanced cervical cancer.
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Affiliation(s)
- Yuanqiang Lin
- Department of Ultrasound, China-Japan Union Hospital, Jilin University, Changchun, China
| | - Guanghui Cheng
- Department of Radiotherapy, China-Japan Union Hospital, Jilin University, Changchun, China
| | - Dan Shi
- Department of Radiotherapy, China-Japan Union Hospital, Jilin University, Changchun, China
| | - Hequn Li
- Department of Ultrasound, China-Japan Union Hospital, Jilin University, Changchun, China
| | - Dengke Teng
- Department of Ultrasound, China-Japan Union Hospital, Jilin University, Changchun, China
| | - Zhipeng Zhao
- Department of Radiotherapy, China-Japan Union Hospital, Jilin University, Changchun, China
| | - Zhuang Mao
- Department of Radiotherapy, China-Japan Union Hospital, Jilin University, Changchun, China
| | - Hui Wang
- Department of Ultrasound, China-Japan Union Hospital, Jilin University, Changchun, China
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Prospective intra/inter-observer evaluation of pre-brachytherapy cervical cancer tumor width measured in TRUS and MR imaging. Radiat Oncol 2019; 14:173. [PMID: 31585543 PMCID: PMC6778388 DOI: 10.1186/s13014-019-1352-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 08/01/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Ultrasound (US) imaging has been proved as an excellent diagnostic tool in gynecology and, due to its wide availability and limited cost, is under intense investigation as base for dose adaptation in cervical cancer brachytherapy. Purpose of this work is to test inter/intra-observer uncertainties between magnetic resonance (MR) and trans-rectal ultrasound (TRUS) imaging in defining maximum tumor width before first brachytherapy (BT) application in a prospective cohort of cervical cancer patients undergoing image-guided adaptive brachytherapy (IGABT). METHODS One hundred ten consecutive cervical cancer patients treated between 2013 and 2016 were included. Before the first BT implant patients underwent MR and TRUS scan with no applicator in place. Images were independently analyzed by three examiners, blinded to the other's results. With clinical information at hand, maximum tumor width was measured on preBT TRUS and MR. Quantitative agreement analysis was undertaken. Intra-class correlation coefficient (ICC), Passing-Bablok and Bland Altman plots were used to evaluate the intra/inter-observers measurement agreement. RESULTS Average difference between tumor width measured on MR (HRCTVMR) and TRUS (HRCTVTRUS) was 1.3 ± 3.2 mm (p < 0.001); 1.1 ± 4.6 mm (p = 0.01) and 0.7 ± 3 mm (p = 0.01). The error was less than 3 mm in 79, 82 and 80% of the measurements for the three observers, respectively. Intra-observer ICC was 0.96 (CI95% 0.94-0.97), 0.93 (CI95% 0.9-0.95) and 0.96 (CI95% 0.95-0.98) respectively. Inter-observer ICC for HRCTVMR width measures was 0.92 (CI95% 0.89-0.94) with no difference among FIGO stages. Inter-observer ICC for HRCTVTRUS was 0.86 (CI95% 0.81-0.9). For FIGO stage I and II tumors, ICC HRCTVTRUS values were comparable to respective HRCTVMR ICC values. For larger tumors HRCTVTRUS inter-observer ICC values were lower than respective HRCTVMR although remaining acceptable. CONCLUSIONS Our results suggest that TRUS is equivalent to MR in assessing preBT tumor maximum width in cervical cancer FIGO stage I/II. In more advanced stages TRUS seems to be slightly inferior to MR although maintaining a good agreement to gold standard imaging.
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Mahantshetty U, Gudi S, Singh R, Sasidharan A, Sastri S(C, Gurram L, Sharma D, Ganeshrajah S, MG J, Badakh D, Basu A, James F, Swamidas JV, Kuppuswamy T, Bhalavat R. Indian Brachytherapy Society Guidelines for radiotherapeutic management of cervical cancer with special emphasis on high-dose-rate brachytherapy. J Contemp Brachytherapy 2019; 11:293-306. [PMID: 31523229 PMCID: PMC6737572 DOI: 10.5114/jcb.2019.87406] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Accepted: 07/30/2019] [Indexed: 12/24/2022] Open
Abstract
Brachytherapy (BT) for locally advanced cervical cancer is vital for optimal outcomes. There is heterogeneity in brachytherapy treatment practice for cervical cancer across India. In an attempt to standardize various processes involved in cervical cancer brachytherapy, the expert members of the Indian Brachytherapy Society (IBS) developed a document related to radiation therapy treatment of cervical cancer with special emphasis on brachytherapy. The guidelines are based on high quality clinical evidence, expert opinion and consensus wherever evidence was lacking. The document provides a guide for external beam radiation and details of all the processes involved in high-dose-rate (HDR) brachytherapy including patient selection, preparation, principles and technique of BT applications, target and normal tissue definition, dose prescriptions, BT planning, reporting parameters, common complications of BT and their management, scope for research, etc. In summary, we present here practical tips and tricks, recording and reporting of cervical cancer brachytherapy, which can be implemented in various clinical environments and forms the basis of this report.
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Affiliation(s)
- Umesh Mahantshetty
- Department of Radiation Oncology, Tata Memorial Centre, Homi Bhabha National Institute, Mumbai, India
| | - Shivakumar Gudi
- Department of Radiation Oncology, Tata Memorial Centre, Homi Bhabha National Institute, Mumbai, India
| | - Roshni Singh
- Department of Radiation Oncology, Tata Memorial Centre, Homi Bhabha National Institute, Mumbai, India
| | - Ajay Sasidharan
- Department of Radiation Oncology, Tata Memorial Centre, Homi Bhabha National Institute, Mumbai, India
| | - Supriya (Chopra) Sastri
- Department of Radiation Oncology, Tata Memorial Centre, Homi Bhabha National Institute, Mumbai, India
| | - Lavanya Gurram
- Department of Radiation Oncology, Tata Memorial Centre, Homi Bhabha National Institute, Mumbai, India
| | - Dayanand Sharma
- Department of Radiation Oncology, All India Institute of Medical Sciences, New Delhi, India
| | | | - Janaki MG
- Department of Radiation Oncology, M.S. Ramaiah Memorial Hospital, Bangalore, India
| | - Dinesh Badakh
- Department of Radiation Oncology, Siddhivinayak Cancer Hospital, Miraj, India
| | - Abhishek Basu
- Department of Radiation Oncology, R.G. Kar Medical College and Hospital, Kolkata, India
| | - Francis James
- Department of Radiation Oncology, Regional Cancer Centre, Thiruvananthapuram, India
| | - Jamema V Swamidas
- Department of Medical Physics, Tata Memorial Centre, Homi Bhabha National Institute, Mumbai, India
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Richart J, Carmona-Meseguer V, García-Martínez T, Herreros A, Otal A, Pellejero S, Tornero-López A, Pérez-Calatayud J. Review of strategies for MRI based reconstruction of endocavitary and interstitial applicators in brachytherapy of cervical cancer. Rep Pract Oncol Radiother 2018; 23:547-561. [PMID: 30534019 PMCID: PMC6277512 DOI: 10.1016/j.rpor.2018.06.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 04/04/2018] [Accepted: 06/23/2018] [Indexed: 12/14/2022] Open
Abstract
Brachytherapy plays an essential role in the curative intent management of locally advanced cervical cancer. The introduction of the magnetic resonance (MR) as a preferred image modality and the development of new type of applicators with interstitial components have further improved its benefits. The aim of this work is to review the current status of one important aspect in the cervix cancer brachytherapy procedure, namely catheter reconstruction. MR compatible intracavitary and interstitial applicators are described. Considerations about the use of MR imaging (MRI) regarding appropriate strategies for applicator reconstruction, technical requirements, MR sequences, patient preparation and applicator commissioning are included. It is recommendable to perform the reconstruction process in the same image study employed by the physician for contouring, that is, T2 weighted (T2W) sequences. Nevertheless, a clear identification of the source path inside the catheters and the applicators is a challenge when using exclusively T2W sequences. For the intracavitary component of the implant, sometimes the catheters may be filled with some substance that produces a high intensity signal on MRI. However, this strategy is not feasible for plastic tubes or titanium needles, which, moreover, induce magnetic susceptibility artifacts. In these situations, the use of applicator libraries available in the treatment planning system (TPS) is useful, since they not only include accurate geometrical models of the intracavitary applicators, but also recent developments have made possible the implementation of the interstitial component. Another strategy to improve the reconstruction process is based on the incorporation of MR markers, such as small pellets, to be used as anchor points. Many institutions employ computed tomography (CT) as a supporting image modality. The registration of CT and MR image sets should be carefully performed, and its uncertainty previously assessed. Besides, an important research work is being carried out regarding the use of ultrasound and electromagnetic tracking technologies.
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Affiliation(s)
- José Richart
- Hospital Clínica Benidorm, Medical Physics Department, Alicante, Spain
| | - Vicente Carmona-Meseguer
- Hospital La Fe-IRIMED, Department of Radiation Oncology, Medical Physics Section, Valencia, Spain
| | | | - Antonio Herreros
- Hospital Clínic, Department of Radiation Oncology, Medical Physics Section, Barcelona, Spain
| | - Antonio Otal
- Hospital Arnau de Vilanova, Medical Physics Department, Lleida, Spain
| | - Santiago Pellejero
- Complejo Hospitalario de Navarra, Medical Physics Department, Pamplona, Spain
| | - Ana Tornero-López
- Hospital Dr. Negrín, Medical Physics Department, Las Palmas de Gran Canaria, Spain
| | - José Pérez-Calatayud
- Hospital La Fe-IRIMED, Department of Radiation Oncology, Medical Physics Section, Valencia, Spain
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12
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Zheng W, Chen K, Peng C, Yin SH, Pan YY, Liu M, Lin SY, Pei XQ. Contrast-enhanced ultrasonography vs MRI for evaluation of local invasion by cervical cancer. Br J Radiol 2018; 91:20170858. [PMID: 30028181 DOI: 10.1259/bjr.20170858] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
OBJECTIVE: The purpose of this study is to compare contrast-enhanced ultrasound (CEUS) to MRI for evaluating local invasion of cervical cancer. METHODS: A total of 108 patients with cervical cancer were included in this study. All the enrolled patients were Stage IIA2-IVB according to the International Federation of Obstetrics and Gynecology and treated with volumetric modulated arc therapy. Tumour size in different dimensions was compared between MRI and CEUS. The correlation coefficients (r) between MRI and CEUS for diagnosing local invasion, parametrial extension, and invasion to vagina, uterine corpus and adjacent organs were assessed. RESULTS: Measurements by MRI and CEUS were strongly correlated in the three dimensions: left-right r = 0.84, craniocaudal r = 0.86 and anteroposterior r = 0.88. Vaginal and parametrial invasion were detected by both MRI and CEUS with moderate concordance, and invasion of uterine corpus, bladder and rectum with good concordance. CONCLUSION: CEUS is comparable to MRI for measuring tumour size, with good concordance for evaluating invasion of cervical cancer. ADVANCES IN KNOWLEDGE: CEUS is a less expensive non-invasive modality for assessment of tumour size and invasion of cervical cancer.
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Affiliation(s)
- Wei Zheng
- 1 Department of Ultrasound, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine , Guangzhou , China
| | - Kai Chen
- 2 Department of Radiotherapy, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine , Guangzhou , China
| | - Chuan Peng
- 1 Department of Ultrasound, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine , Guangzhou , China
| | - Shao-Han Yin
- 3 Department of Radiology, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine , Guangzhou , China
| | - Yong-Ying Pan
- 4 Department of Anesthesiology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University , Guangzhou , China
| | - Min Liu
- 1 Department of Ultrasound, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine , Guangzhou , China
| | - Shi-Yang Lin
- 1 Department of Ultrasound, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine , Guangzhou , China
| | - Xiao-Qing Pei
- 1 Department of Ultrasound, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine , Guangzhou , China
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Hellebust T. Place of modern imaging in brachytherapy planning. Cancer Radiother 2018; 22:326-333. [DOI: 10.1016/j.canrad.2018.03.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 03/20/2018] [Indexed: 01/07/2023]
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Tharavichitkul E, Chakrabandhu S, Klunklin P, Onchan W, Jia-Mahasap B, Wanwilairat S, Tippanya D, Jayasvasti R, Sripan P, Galalae RM, Chitapanarux I. Intermediate-term results of trans-abdominal ultrasound (TAUS)-guided brachytherapy in cervical cancer. Gynecol Oncol 2018; 148:468-473. [DOI: 10.1016/j.ygyno.2018.01.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Revised: 01/11/2018] [Accepted: 01/14/2018] [Indexed: 10/18/2022]
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Ultrasound Image Based High Dose Rate (HDR) Brachytherapy in Locally Advanced Cancer Cervix. INTERNATIONAL JOURNAL OF CANCER MANAGEMENT 2017. [DOI: 10.5812/ijcm.7392] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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16
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The use of trans-applicator intracavitary ultrasonography in brachytherapy for cervical cancer: phantom study of a novel approach to 3D image-guided brachytherapy. J Contemp Brachytherapy 2017; 9:151-157. [PMID: 28533804 PMCID: PMC5437077 DOI: 10.5114/jcb.2017.66588] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Accepted: 01/20/2017] [Indexed: 12/04/2022] Open
Abstract
Purpose To assess the feasibility of applying trans-applicator intracavitary ultrasonography to image-guided brachytherapy for cervical cancer. Material and methods For this experiment, a phantom was created and included a polyethylene tube, intended to simulate a tandem applicator, which was inserted into chicken meat and embedded in agar, along with magnetic resonance imaging (MRI)-compatible ovoid applicators. Three-dimensional images of the phantom were obtained using computed tomography (CT), MRI (T2-weighted), and intracavitary ultrasonography sectional images acquired at 1 mm slice intervals. Intracavitary ultrasonography images were acquired from within the simulated tandem applicator using a radial transducer. Magnetic resonance imaging and intracavitary ultrasonography images were manually registered onto CT images. The chicken meat was contoured as the target volume independently on the CT, MRI, and intracavitary ultrasonography images, and the Dice similarity coefficient was used to compare the target volumes. The dose distributions of a sample brachytherapy plan were also evaluated. Results Computed tomography, MRI, and intracavitary ultrasonography all visualized the three-dimensional phantom volumes. Intracavitary ultrasonography images depicted the meat with high echoic signals and a border clearly distinguishable from the surrounding agar. The Dice similarity coefficient values for the target volumes on CT vs. MRI, CT vs. intracavitary ultrasonography, and MRI vs. intracavitary ultrasonography were 0.966, 0.965, and 0.971, respectively, indicating similar contouring with the three modalities. Among the modalities, the differences in D50, D90, D98, and D100 values were 1.8%, 2.9%, 3.7%, and 2.9%, respectively. Conclusions Three-dimensional reconstructed trans-applicator intracavitary ultrasonographic images clearly depicted meat tissue within the phantom, and could thus be used for brachytherapy planning. This study proves the concept of trans-applicator intracavitary ultrasonography for intracavitary brachytherapy. Further research such as development of intracavitary ultrasonography system, 3D reconstruction method, ultrasonography-compatible applicators, and ultrasonography-based target concept is warranted to assess the potential clinical application.
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Lim K, van Dyk S, Khaw P, Veera J, Mileshkin L, Ohanessian L, Harrison M, Vinod SK. Patterns of practice survey for brachytherapy for cervix cancer in Australia and New Zealand. J Med Imaging Radiat Oncol 2017; 61:674-681. [DOI: 10.1111/1754-9485.12614] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 03/11/2017] [Indexed: 11/29/2022]
Affiliation(s)
- Karen Lim
- Cancer Therapy Centre; Liverpool Hospital; Liverpool New South Wales Australia
- South Western Sydney Clinical School, UNSW, Medical Education and Research Precinct Level 2, Clinical Building; Liverpool Hospital; Liverpool New South Wales Australia
| | - Sylvia van Dyk
- Peter MacCallum Cancer Centre; Parkville Victoria Australia
| | - Pearly Khaw
- Peter MacCallum Cancer Centre; Parkville Victoria Australia
| | - Jacqueline Veera
- South Western Sydney Clinical School, UNSW, Medical Education and Research Precinct Level 2, Clinical Building; Liverpool Hospital; Liverpool New South Wales Australia
- Peter MacCallum Cancer Centre; Parkville Victoria Australia
| | | | - Lucy Ohanessian
- Cancer Therapy Centre; Liverpool Hospital; Liverpool New South Wales Australia
| | - Michelle Harrison
- Cancer Therapy Centre; Liverpool Hospital; Liverpool New South Wales Australia
- Chris O'Brien Lifehouse; Royal Prince Alfred Hospital; Camperdown New South Wales Australia
| | - Shalini K Vinod
- Cancer Therapy Centre; Liverpool Hospital; Liverpool New South Wales Australia
- South Western Sydney Clinical School, UNSW, Medical Education and Research Precinct Level 2, Clinical Building; Liverpool Hospital; Liverpool New South Wales Australia
- Western Sydney University, Medical Education and Research Precinct Level 2, Clinical Building; Liverpool Hospital; Liverpool New South Wales Australia
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St-Amant P, Foster W, Froment MA, Aubin S, Lavallée MC, Beaulieu L. Use of 3D transabdominal ultrasound imaging for treatment planning in cervical cancer brachytherapy: Comparison to magnetic resonance and computed tomography. Brachytherapy 2017; 16:847-854. [PMID: 28455092 DOI: 10.1016/j.brachy.2017.03.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 03/13/2017] [Accepted: 03/19/2017] [Indexed: 12/16/2022]
Abstract
PURPOSE To evaluate if the addition of 3D transabdominal ultrasound (3DTAUS) imaging to computed tomography (CT) can improve treatment planning in 3D adaptive brachytherapy when compared with CT-based planning alone, resulting in treatment plans closer to the ones obtained using magnetic resonance imaging (MRI)-based planning. METHODS AND MATERIALS Five patients with cervical cancer undergoing brachytherapy underwent three imaging modalities: MRI, CT, and CT-3DTAUS. Volumes were delineated by a radiation oncologist and treatment plans were optimized on each imaging modality. To compare treatment plans, the dwell times optimized on MRI were transferred on CT and CT-3DTAUS images and dose parameters were reported on volumes of the receiving imaging modality. The plans optimized on CT and CT-3DTAUS were also copied and evaluated on MRI images. RESULTS Treatment plans optimized and evaluated on the same imaging modalities were clinically acceptable but statistically different (p < 0.05) from one another. MR-based plans had the highest target coverage (98%) and CT-based plans the lowest (93%). For all treatment plans evaluated on MRI, the target coverage was equivalent. However, a decrease in target coverage (V100) was observed when MR-based plans were applied on CT-3DTAUS (6%) and CT (13%) with p < 0.05. An increase in the rectum/sigmoid dose (D2cc) was observed with both CT-3DTAUS-based (0.6 Gy) and CT-based planning (1 Gy) when compared with MR-based plans, whereas bladder dose stayed similar. CONCLUSIONS When compared with CT-based planning, the addition of 3DTAUS to CT results in treatment plans closer to MR-based planning. Its use reduces the high-risk clinical target volume overestimation typically observed on CT, improving coverage of the target volume while reducing dose to the organs at risk.
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Affiliation(s)
- Patricia St-Amant
- Radiation Oncology Department, CHU de Québec-Université Laval, Québec, Québec, Canada; Department of Physics, Physics Engineering and Optic, and Cancer Research Centre, Université Laval, Québec, Québec, Canada; Centre de recherche du CHU de Québec et Axe Oncologie, CHU de Québec-Université Laval, Québec, Québec, Canada
| | - William Foster
- Radiation Oncology Department, CHU de Québec-Université Laval, Québec, Québec, Canada
| | - Marie-Anne Froment
- Radiation Oncology Department, CHU de Québec-Université Laval, Québec, Québec, Canada
| | - Sylviane Aubin
- Radiation Oncology Department, CHU de Québec-Université Laval, Québec, Québec, Canada
| | - Marie-Claude Lavallée
- Radiation Oncology Department, CHU de Québec-Université Laval, Québec, Québec, Canada
| | - Luc Beaulieu
- Radiation Oncology Department, CHU de Québec-Université Laval, Québec, Québec, Canada; Department of Physics, Physics Engineering and Optic, and Cancer Research Centre, Université Laval, Québec, Québec, Canada; Centre de recherche du CHU de Québec et Axe Oncologie, CHU de Québec-Université Laval, Québec, Québec, Canada.
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Suneja G, Brown D, Chang A, Erickson B, Fidarova E, Grover S, Mahantshetty U, Nag S, Narayan K, Bvochora-Nsingo M, Viegas C, Viswanathan AN, Lin MY, Gaffney D. American Brachytherapy Society: Brachytherapy treatment recommendations for locally advanced cervix cancer for low-income and middle-income countries. Brachytherapy 2016; 16:85-94. [PMID: 27919654 DOI: 10.1016/j.brachy.2016.10.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 09/06/2016] [Accepted: 10/21/2016] [Indexed: 01/17/2023]
Abstract
PURPOSE Most cervix cancer cases occur in low-income and middle-income countries (LMIC), and outcomes are suboptimal, even for early stage disease. Brachytherapy plays a central role in the treatment paradigm, improving both local control and overall survival. The American Brachytherapy Society (ABS) aims to provide guidelines for brachytherapy delivery in resource-limited settings. METHODS AND MATERIALS A panel of clinicians and physicists with expertise in brachytherapy administration in LMIC was convened. A survey was developed to identify practice patterns at the authors' institutions and was also extended to participants of the Cervix Cancer Research Network. The scientific literature was reviewed to identify consensus papers or review articles with a focus on treatment of locally advanced, unresected cervical cancer in LMIC. RESULTS Of the 40 participants invited to respond to the survey, 32 responded (response rate 80%). Participants were practicing in 14 different countries including both high-income (China, Singapore, Taiwan, United Kingdom, and United States) and low-income or middle-income countries (Bangladesh, Botswana, Brazil, India, Malaysia, Pakistan, Philippines, Thailand, and Vietnam). Recommendations for modifications to existing ABS guidelines were reviewed by the panel members and are highlighted in this article. CONCLUSIONS Recommendations for treatment of locally advanced, unresectable cervical cancer in LMIC are presented. The guidelines comment on staging, external beam radiotherapy, use of concurrent chemotherapy, overall treatment duration, use of anesthesia, applicator choice and placement verification, brachytherapy treatment planning including dose and prescription point, recommended reporting and documentation, physics support, and follow-up.
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Affiliation(s)
| | - Derek Brown
- University of California San Diego, San Diego, CA
| | - Amy Chang
- Pamela Youde Nethersole Eastern Hospital, Hong Kong
| | | | | | - Surbhi Grover
- University of Pennsylvania, Philadelphia, PA; Princess Marina Hospital, Gaborone, Botswana
| | | | | | | | | | - Celia Viegas
- Instituto Nacional de Cancer- INCA, Rio de Janeiro, Brazil
| | | | - Ming Yin Lin
- Peter MacCallum Cancer Centre, Melbourne, Australia
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Otter S, Franklin A, Ajaz M, Stewart A. Improving the efficiency of image guided brachytherapy in cervical cancer. J Contemp Brachytherapy 2016; 8:557-565. [PMID: 28115963 PMCID: PMC5241377 DOI: 10.5114/jcb.2016.64452] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 11/16/2016] [Indexed: 11/21/2022] Open
Abstract
Brachytherapy is an essential component of the treatment of locally advanced cervical cancers. It enables the dose to the tumor to be boosted whilst allowing relative sparing of the normal tissues. Traditionally, cervical brachytherapy was prescribed to point A but since the GEC-ESTRO guidelines were published in 2005, there has been a move towards prescribing the dose to a 3D volume. Image guided brachytherapy has been shown to reduce local recurrence, and improve survival and is optimally predicated on magnetic resonance imaging. Radiological studies, patient workflow, operative parameters, and intensive therapy planning can represent a challenge to clinical resources. This article explores the ways, in which 3D conformal brachytherapy can be implemented and draws findings from recent literature and a well-developed hospital practice in order to suggest ways to improve the efficiency and efficacy of a brachytherapy service. Finally, we discuss relatively underexploited translational research opportunities.
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Affiliation(s)
- Sophie Otter
- St Luke’s Cancer Centre, Royal Surrey County Hospital, Guildford
| | - Adrian Franklin
- St Luke’s Cancer Centre, Royal Surrey County Hospital, Guildford
| | - Mazhar Ajaz
- St Luke’s Cancer Centre, Royal Surrey County Hospital, Guildford
- University of Surrey, Guildford, United Kingdom
| | - Alexandra Stewart
- St Luke’s Cancer Centre, Royal Surrey County Hospital, Guildford
- University of Surrey, Guildford, United Kingdom
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21
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van Dyk S, Narayan K, Bernshaw D, Kondalsamy-Chennakesavan S, Khaw P, Lin MY, Schneider M. Clinical outcomes from an innovative protocol using serial ultrasound imaging and a single MR image to guide brachytherapy for locally advanced cervix cancer. Brachytherapy 2016; 15:817-824. [PMID: 27593599 DOI: 10.1016/j.brachy.2016.07.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Revised: 07/12/2016] [Accepted: 07/25/2016] [Indexed: 10/21/2022]
Abstract
PURPOSE The aim of this study was to report clinical outcomes in a series of patients who underwent serial ultrasound and a single MRI to plan and verify intracavitary brachytherapy. METHODS AND MATERIALS Data for patients who were referred for curative intent radiotherapy for International Federation of Gynecology and Obstetrics (FIGO) Stage 1-1V cervix cancer between January 2007 and March 2012 were analyzed. All patients received external beam radiotherapy with concurrent chemotherapy and sequential high-dose rate brachytherapy. Brachytherapy was planned and verified using serial ultrasound imaging and a single MRI. RESULTS Data from 191 patients were available for analyses. The median (range) followup time was 5.08 (0.25-8.25) years. Five-year local control, failure-free survival, cancer-specific survival, and overall survival were 86%, 57.3%, 70% and 63%, respectively. Mean (standard deviation) combined external beam radiotherapy and brachytherapy target doses, equivalent to doses in 2 Gy fractions were 80.4 Gy10 (3.89), median (range) 80 (49-96) Gy10. Grade 3 or greater gastrointestinal, genitourinary, or vaginal late toxicity occurred in 3%, 1.6%, and 2% of patients, respectively. Survival, patterns of failure, and late complication rates were similar to published series of MRI/CT-based brachytherapy practices. CONCLUSIONS This large study demonstrates that favorable treatment outcomes can be obtained using a pragmatic and innovative combination of ultrasound and MR imaging.
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Affiliation(s)
- Sylvia van Dyk
- Radiation Therapy Services, Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia.
| | - Kailash Narayan
- Division of Radiation Oncology, Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia; Department of Obstetrics and Gynaecology, Melbourne University, Melbourne, Victoria, Australia
| | - David Bernshaw
- Division of Radiation Oncology, Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia
| | | | - Pearly Khaw
- Division of Radiation Oncology, Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia
| | - Ming Yin Lin
- Division of Radiation Oncology, Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia
| | - Michal Schneider
- Department of Medical Imaging and Radiation Science, Monash University, Clayton, Victoria, Australia
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Baker M, Cooper DT, Behrens CF. Evaluation of uterine ultrasound imaging in cervical radiotherapy; a comparison of autoscan and conventional probe. Br J Radiol 2016; 89:20160510. [PMID: 27452268 DOI: 10.1259/bjr.20160510] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE In cervical radiotherapy, it is essential that the uterine position is correctly determined prior to treatment delivery. The aim of this study was to evaluate an autoscan ultrasound (A-US) probe, a motorized transducer creating three-dimensional (3D) images by sweeping, by comparing it with a conventional ultrasound (C-US) probe, where manual scanning is required to acquire 3D images. METHODS Nine healthy volunteers were scanned by seven operators, using the Clarity(®) system (Elekta, Stockholm, Sweden). In total, 72 scans, 36 scans from the C-US and 36 scans from the A-US probes, were acquired. Two observers delineated the uterine structure, using the software-assisted segmentation in the Clarity workstation. The data of uterine volume, uterine centre of mass (COM) and maximum uterine lengths, in three orthogonal directions, were analyzed. RESULTS In 53% of the C-US scans, the whole uterus was captured, compared with 89% using the A-US. F-test on 36 scans demonstrated statistically significant differences in interobserver COM standard deviation (SD) when comparing the C-US with the A-US probe for the inferior-superior (p < 0.006), left-right (p < 0.012) and anteroposterior directions (p < 0.001). The median of the interobserver COM distance (Euclidean distance for 36 scans) was reduced from 8.5 (C-US) to 6.0 mm (A-US). An F-test on the 36 scans showed strong significant differences (p < 0.001) in the SD of the Euclidean interobserver distance when comparing the C-US with the A-US scans. The average Dice coefficient when comparing the two observers was 0.67 (C-US) and 0.75 (A-US). The predictive interval demonstrated better interobserver delineation concordance using the A-US probe. CONCLUSION The A-US probe imaging might be a better choice of image-guided radiotherapy system for correcting for daily uterine positional changes in cervical radiotherapy. ADVANCES IN KNOWLEDGE Using a novel A-US probe might reduce the uncertainty in interoperator variability during ultrasound scanning.
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Affiliation(s)
- Mariwan Baker
- 1 Department of Oncology, Radiotherapy Research Unit, Herlev Hospital, University of Copenhagen, Copenhagen, Denmark.,2 Center for Fast Ultrasound Imaging, Department of Electrical Engineering, Technical University of Denmark, Lyngby, Denmark.,3 Center for Nuclear Technologies, Technical University of Denmark, Roskilde, Denmark
| | | | - Claus F Behrens
- 1 Department of Oncology, Radiotherapy Research Unit, Herlev Hospital, University of Copenhagen, Copenhagen, Denmark
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Petric P, Kirisits C. Potential role of TRAns Cervical Endosonography (TRACE) in brachytherapy of cervical cancer: proof of concept. J Contemp Brachytherapy 2016; 8:215-20. [PMID: 27504131 PMCID: PMC4965497 DOI: 10.5114/jcb.2016.60502] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Accepted: 05/09/2016] [Indexed: 11/17/2022] Open
Abstract
PURPOSE Magnetic resonance imaging (MRI) is the gold standard for image guided adaptive brachytherapy (BT) of cervical cancer. Ultrasound is an attractive alternative with reasonable costs and high soft tissue depiction quality. This technical note aims to demonstrate the proof of principle for use of TRAns Cervical Endosonography with rotating transducer in the context of brachytherapy (TRACE BT). MATERIAL AND METHODS TRACE BT presentation is based on a single stage IIB cervical cancer patient. Prior to second BT implant, rotating US transducer (6.9 mm diameter) was inserted in cervical canal and axial images obtained at 10 MHz, focal range of 30 mm, and axial resolution of 0.4 mm. Size and topography of hypo-echoic areas were assessed and optimal positions of interstitial needles were determined. Finally, intracavitary applicator was placed and needles inserted through vaginal ring-template according to TRACE pre-plan. MRI-based high risk clinical target volume (CTVHR) dimensions were compared with hypoechoic areas on TRACE. Topography of parametrial needles on post-insertion MRI was compared with TRACE pre-plan. RESULTS Insertion of rotating mechanism into cervico-uterine cavity was safe, feasible and fast. The 360° imaging in axial plane enabled real-time assessment of cervix, uterus, and adjacent parametria. Qualitative comparison of TRACE with post-insertion MRI revealed favorable agreement of findings. In-plane size of CTVHR on MRI was comparable to hypoechoic areas on TRACE. Needle positions on post-insertion MRI corresponded to TRACE-based pre-plan. Main limitation of TRACE was gradual deterioration of image quality due to coupling gel removal. CONCLUSIONS Present proof of concept demonstrates potential role of TRACE-BT for cervical cancer as an attractive high-tech approach with reasonable costs. Prior to investigation of its clinical role, further development of TRACE methodology is needed. This includes reliable transducer-tissue coupling, applicator reconstruction, imaging range, limitations in extensive tumors, US-based contouring concepts, registration with other imaging methods, organ dose-assessment, real-time dosimetry, etc.
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Affiliation(s)
- Primoz Petric
- National Center for Cancer Care and Research, Hamad Medical Corporation, Doha, Qatar
- Department of Brachytherapy, Sector of Radiotherapy, Institute of Oncology Ljubljana, Ljubljana, Slovenia
| | - Christian Kirisits
- Department of Radiotherapy, Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria
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Moving from standardized to personalized boxes and pears in radiation planning for cervical cancer. Curr Opin Obstet Gynecol 2015; 28:18-23. [PMID: 26694828 DOI: 10.1097/gco.0000000000000235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE OF REVIEW We reviewed the most recent literature on advancements in external beam radiation therapy, brachytherapy, and stereotactic body radiation therapy (SBRT) in the treatment of cervical cancer. RECENT FINDINGS There is a growing transition from three-dimensional-conformal radiation therapy to intensity modulated radiation therapy, and from point A-based two-dimensional prescriptions to three-dimensional volume-based prescriptions in image-guided brachytherapy (IGBT). These advances allow dose-escalation to at-risk regions while sparing normal tissues. Implementation of these techniques is resulting in improved local control and decreased toxicity in patients. With increased local control, the predominant pattern of recurrence is now distant failure, opening the door for SBRT as an emerging treatment option for select patients with limited numbers of metastases (oligometastatic state). SUMMARY The integration of IGBT, as well as dose sculpting with intensity modulated radiation therapy, is improving outcomes in women with locally advanced cervical cancer. The clinical evidence strongly supports moving away from point A-based prescriptions and adopting IGBT techniques. The existing data supporting SBRT for gynecologic oligometastases are more limited and require further research before widespread adoption; however, evidence from other disease sites is promising.
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Grover S, Harkenrider MM, Cho LP, Erickson B, Small C, Small W, Viswanathan AN. Image Guided Cervical Brachytherapy: 2014 Survey of the American Brachytherapy Society. Int J Radiat Oncol Biol Phys 2015; 94:598-604. [PMID: 26867888 DOI: 10.1016/j.ijrobp.2015.11.024] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Indexed: 01/27/2023]
Abstract
PURPOSE To provide an update of the 2007 American brachytherapy survey on image-based brachytherapy, which showed that in the setting of treatment planning for gynecologic brachytherapy, although computed tomography (CT) was often used for treatment planning, most brachytherapists used point A for dose specification. METHODS AND MATERIALS A 45-question electronic survey on cervical cancer brachytherapy practice patterns was sent to all American Brachytherapy Society members and additional radiation oncologists and physicists based in the United States between January and September 2014. Responses from the 2007 survey and the present survey were compared using the χ(2) test. RESULTS There were 370 respondents. Of those, only respondents, not in training, who treat more than 1 cervical cancer patient per year and practice in the United States, were included in the analysis (219). For dose specification to the target (cervix and tumor), 95% always use CT, and 34% always use MRI. However, 46% use point A only for dose specification to the target. There was a lot of variation in parameters used for dose evaluation of target volume and normal tissues. Compared with the 2007 survey, use of MRI has increased from 2% to 34% (P<.0001) for dose specification to the target. Use of volume-based dose delineation to the target has increased from 14% to 52% (P<.0001). CONCLUSION Although use of image-based brachytherapy has increased in the United States since the 2007 survey, there is room for further growth, particularly with the use of MRI. This increase may be in part due to educational initiatives. However, there is still significant heterogeneity in brachytherapy practice in the United States, and future efforts should be geared toward standardizing treatment.
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Affiliation(s)
- Surbhi Grover
- Department of Radiation Oncology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.
| | - Matthew M Harkenrider
- Department of Radiation Oncology, Stritch School of Medicine, Loyola University Chicago, Chicago, Illinois
| | - Linda P Cho
- Department of Radiation Oncology, Brigham & Women's Hospital/Dana-Farber Cancer Institute, Boston, Massachusetts
| | - Beth Erickson
- Department Radiation Oncology, Froedtert Hospital and Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Christina Small
- Department of Public Health Sciences, Stritch School of Medicine, Loyola University Chicago, Chicago, Illinois
| | - William Small
- Department of Radiation Oncology, Stritch School of Medicine, Loyola University Chicago, Chicago, Illinois
| | - Akila N Viswanathan
- Department of Radiation Oncology, Brigham & Women's Hospital/Dana-Farber Cancer Institute, Boston, Massachusetts
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van Dyk S, Garth M, Oates A, Kondalsamy-Chennakesavan S, Schneider M, Bernshaw D, Narayan K. Reproducibility and interoperator reliability of obtaining images and measurements of the cervix and uterus with brachytherapy treatment applicators in situ using transabdominal ultrasound. Brachytherapy 2015; 15:71-8. [PMID: 26614235 DOI: 10.1016/j.brachy.2015.10.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Revised: 10/06/2015] [Accepted: 10/26/2015] [Indexed: 10/22/2022]
Abstract
PURPOSE To validate interoperator reliability of brachytherapy radiation therapists (RTs) in obtaining an ultrasound image and measuring the cervix and uterine dimensions using transabdominal ultrasound. METHODS AND MATERIALS Patients who underwent MRI with applicators in situ after the first insertion were included in the study. Imaging was performed by three RTs (RT1, RT2, and RT3) with varying degrees of ultrasound experience. All RTs were required to obtain a longitudinal planning image depicting the applicator in the uterine canal and measure the cervix and uterus. The MRI scan, taken 1 hour after the ultrasound, was used as the reference standard against which all measurements were compared. Measurements were analyzed with intraclass correlation coefficient and Bland-Altman plots. RESULTS All RTs were able to obtain a suitable longitudinal image for each patient in the study. Mean differences (SD) between MRI and ultrasound measurements obtained by RTs ranged from 3.5 (3.6) to 4.4 (4.23) mm and 0 (3.0) to 0.9 (2.5) mm on the anterior and posterior surface of the cervix, respectively. Intraclass correlation coefficient for absolute agreement between MRI and RTs was >0.9 for all posterior measurement points in the cervix and ranged from 0.41 to 0.92 on the anterior surface. Measurements were not statistically different between RTs at any measurement point. CONCLUSIONS RTs with variable training attained high levels of interoperator reliability when using transabdominal ultrasound to obtain images and measurements of the uterus and cervix with brachytherapy applicators in situ. Access to training and use of a well-defined protocol assist in achieving these high levels of reliability.
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Affiliation(s)
- Sylvia van Dyk
- Radiation Therapy Services, Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia.
| | - Margaret Garth
- Radiation Therapy Services, Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia
| | - Amanda Oates
- Radiation Therapy Services, Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia
| | | | - Michal Schneider
- Department of Medical Imaging and Radiation Science, Monash University, Clayton, Victoria, Australia
| | - David Bernshaw
- Division of Radiation Oncology, Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia
| | - Kailash Narayan
- Division of Radiation Oncology, Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia; Department of Obstetrics and Gynaecology, Melbourne University, Melbourne, Victoria, Australia
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Kirisits C, Schmid MP, Beriwal S, Pötter R. High-tech image-guided therapy versus low-tech, simple, cheap gynecologic brachytherapy. Brachytherapy 2015; 14:910-2. [PMID: 26427957 DOI: 10.1016/j.brachy.2015.08.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Revised: 08/03/2015] [Accepted: 08/13/2015] [Indexed: 10/23/2022]
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van Dyk S, Kondalsamy-Chennakesavan S, Schneider M, Bernshaw D, Narayan K. Assessing changes to the brachytherapy target for cervical cancer using a single MRI and serial ultrasound. Brachytherapy 2015; 14:889-97. [DOI: 10.1016/j.brachy.2015.04.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Revised: 04/15/2015] [Accepted: 04/27/2015] [Indexed: 11/17/2022]
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Viswanathan AN, Erickson BA. Seeing is saving: The benefit of 3D imaging in gynecologic brachytherapy. Gynecol Oncol 2015; 138:207-15. [DOI: 10.1016/j.ygyno.2015.02.025] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Accepted: 02/26/2015] [Indexed: 12/18/2022]
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van Dyk S, Schneider M, Kondalsamy-Chennakesavan S, Bernshaw D, Narayan K. Ultrasound use in gynecologic brachytherapy: Time to focus the beam. Brachytherapy 2015; 14:390-400. [DOI: 10.1016/j.brachy.2014.12.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Revised: 11/22/2014] [Accepted: 12/04/2014] [Indexed: 10/24/2022]
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Tharavichitkul E, Tippanya D, Jayavasti R, Chakrabandhu S, Klunklin P, Onchan W, Wanwilairat S, Galalae RM, Chitapanarux I. Two-year results of transabdominal ultrasound-guided brachytherapy for cervical cancer. Brachytherapy 2015; 14:238-44. [DOI: 10.1016/j.brachy.2014.11.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2014] [Revised: 10/28/2014] [Accepted: 11/03/2014] [Indexed: 11/15/2022]
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Stoelinga B, Huirne J, Heymans MW, Reekers JA, Ankum WM, Hehenkamp WJ. The estimated volume of the fibroid uterus: a comparison of ultrasound and bimanual examination versus volume at MRI or hysterectomy. Eur J Obstet Gynecol Reprod Biol 2015; 184:89-96. [DOI: 10.1016/j.ejogrb.2014.11.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Revised: 10/29/2014] [Accepted: 11/11/2014] [Indexed: 11/15/2022]
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Srivastava A, Datta NR. Brachytherapy in cancer cervix: Time to move ahead from point A? World J Clin Oncol 2014; 5:764-74. [PMID: 25302176 PMCID: PMC4129539 DOI: 10.5306/wjco.v5.i4.764] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2013] [Revised: 02/28/2014] [Accepted: 04/03/2014] [Indexed: 02/06/2023] Open
Abstract
Brachytherapy forms an integral part of the radiation therapy in cancer cervix. The dose prescription for intracavitary brachytherapy (ICBT) in cancer cervix is based on Tod and Meredith's point A and has been in practice since 1938. This was proposed at a time when accessibility to imaging technology and dose computation facilities was limited. The concept has been in practice worldwide for more than half a century and has been the fulcrum of all ICBT treatments, strategies and outcome measures. The method is simple and can be adapted by all centres practicing ICBT in cancer cervix. However, with the widespread availability of imaging techniques, clinical use of different dose-rates, availability of a host of applicators fabricated with image compatible materials, radiobiological implications of dose equivalence and its impact on tumour and organs at risk; more and more weight is being laid down on individualised image based brachytherapy. Thus, computed tomography, magnetic-resonance imaging and even positron emission computerized tomography along with brachytherapy treatment planning system are being increasingly adopted with promising outcomes. The present article reviews the evolution of dose prescription concepts in ICBT in cancer cervix and brings forward the need for image based brachytherapy to evaluate clinical outcomes. As is evident, a gradual transition from "point" based brachytherapy to "profile" based image guided brachytherapy is gaining widespread acceptance for dose prescription, reporting and outcome evaluation in the clinical practice of ICBT in cancer cervix.
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Coza OF, Ordeanu C. Comparison of measurements of the uterus and cervix obtained by magnetic resonance and transabdominal ultrasound imaging to identify the brachytherapy target in patients with cervix cancer: in regard to van Dyk et al. Int J Radiat Oncol Biol Phys 2014; 90:471-2. [PMID: 25304804 DOI: 10.1016/j.ijrobp.2014.06.047] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2014] [Revised: 06/19/2014] [Accepted: 06/19/2014] [Indexed: 10/24/2022]
Affiliation(s)
- Ovidiu F Coza
- Department of Brachytherapy, Oncology Institute Prof.Dr.I.Chiricuta, Cluj-Napoca, Romania
| | - Claudia Ordeanu
- Department of Brachytherapy, Oncology Institute Prof.Dr.I.Chiricuta, Cluj-Napoca, Romania
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van Dyk S, Narayan K. In reply to Coza and Ordeanu. Int J Radiat Oncol Biol Phys 2014; 90:472-3. [PMID: 25304805 DOI: 10.1016/j.ijrobp.2014.06.049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Revised: 06/19/2014] [Accepted: 06/19/2014] [Indexed: 11/28/2022]
Affiliation(s)
- Sylvia van Dyk
- Radiation Therapy Services, Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia
| | - Kailash Narayan
- Division of Radiation Oncology, Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia; Department of Obstetrics and Gynaecology, Melbourne University, Melbourne, Victoria, Australia
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Narayan K, van Dyk S, Bernshaw D, Khaw P, Mileshkin L, Kondalsamy-Chennakesavan S. Ultrasound guided conformal brachytherapy of cervix cancer: survival, patterns of failure, and late complications. J Gynecol Oncol 2014; 25:206-13. [PMID: 25045433 PMCID: PMC4102739 DOI: 10.3802/jgo.2014.25.3.206] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2014] [Revised: 05/13/2014] [Accepted: 05/13/2014] [Indexed: 12/04/2022] Open
Abstract
Objective The aim of this study was to report on the long-term results of transabdominal ultrasound guided conformal brachytherapy in patients with cervical cancer with respect to patterns of failures, treatment related toxicities and survival. Methods Three hundred and nine patients with cervical cancer who presented to Institute between January 1999 and December 2008 were staged with magnetic resonance imaging and positron emission tomography and treated with external beam radiotherapy and high dose rate conformal image guided brachytherapy with curative intent. Follow-up data relating to sites of failure and toxicity was recorded prospectively. Results Two hundred and ninety-two patients were available for analyses. The median (interquantile range) follow-up time was 4.1 years (range, 2.4 to 6.1 years). Five-year failure free survival and overall survival (OS) were 66% and 65%, respectively. Primary, pelvic, para-aortic, and distant failure were observed in 12.5%, 16.4%, 22%, and 23% of patients, respectively. In multivariate analysis, tumor volume and nodal disease related to survival, whereas local disease control and point A dose did not. Conclusion Ultrasound guided conformal brachytherapy of cervix cancer has led to optimal local control and OS. The Melbourne protocol compares favorably to the more technically elaborate and expensive GEC-ESTRO recommendations. The Melbourne protocol's technical simplicity with real-time imaging and treatment planning makes this a method of choice for treating patients with cervical cancer.
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Affiliation(s)
- Kailash Narayan
- Peter MacCallum Cancer Centre and University of Melbourne, East Melbourne, VIC, Australia
| | - Sylvia van Dyk
- Radiation Therapy Services, Peter MacCallum Cancer Centre, East Melbourne, VIC, Australia
| | - David Bernshaw
- Division of Radiation Oncology, Peter MacCallum Cancer Centre, East Melbourne, VIC, Australia
| | - Pearly Khaw
- Division of Radiation Oncology, Peter MacCallum Cancer Centre, East Melbourne, VIC, Australia
| | - Linda Mileshkin
- Division of Medical Oncology, Peter MacCallum Cancer Centre, East Melbourne, VIC, Australia
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