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Sabloff M, Tisseverasinghe S, Babadagli ME, Samant R. Total Body Irradiation for Hematopoietic Stem Cell Transplantation: What Can We Agree on? ACTA ACUST UNITED AC 2021; 28:903-917. [PMID: 33617507 PMCID: PMC7985756 DOI: 10.3390/curroncol28010089] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 01/19/2021] [Accepted: 02/02/2021] [Indexed: 01/23/2023]
Abstract
Total body irradiation (TBI), used as part of the conditioning regimen prior to allogeneic and autologous hematopoietic cell transplantation, is the delivery of a relatively homogeneous dose of radiation to the entire body. TBI has a dual role, being cytotoxic and immunosuppressive. This allows it to eliminate disease and create “space” in the marrow while also impairing the immune system from rejecting the foreign donor cells being transplanted. Advantages that TBI may have over chemotherapy alone are that it may achieve greater tumour cytotoxicity and better tissue penetration than chemotherapy as its delivery is independent of vascular supply and physiologic barriers such as renal and hepatic function. Therefore, the so-called “sanctuary” sites such as the central nervous system (CNS), testes, and orbits or other sites with limited blood supply are not off-limits to radiation. Nevertheless, TBI is hampered by challenging logistics of administration, coordination between hematology and radiation oncology departments, increased rates of acute treatment-related morbidity and mortality along with late toxicity to other tissues. Newer technologies and a better understanding of the biology and physics of TBI has allowed the field to develop novel delivery systems which may help to deliver radiation more safely while maintaining its efficacy. However, continued research and collaboration are needed to determine the best approaches for the use of TBI in the future.
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Affiliation(s)
- Mitchell Sabloff
- Division of Hematology, Department of Medicine, University of Ottawa, Ottawa, ON K1H 8L6, Canada;
- The Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
| | | | - Mustafa Ege Babadagli
- Division of Radiation Oncology, The Ottawa Hospital, Ottawa, ON K1H 8L6, Canada;
- Correspondence:
| | - Rajiv Samant
- Division of Radiation Oncology, The Ottawa Hospital, Ottawa, ON K1H 8L6, Canada;
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Hoseinnezhad Zarghani E, Geraily G, Hadisinia T. Comparison of different TBI techniques in terms of dose homogeneity - review study. Cancer Radiother 2021; 25:380-389. [PMID: 33431295 DOI: 10.1016/j.canrad.2020.12.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 12/03/2020] [Accepted: 12/05/2020] [Indexed: 10/22/2022]
Abstract
Total body irradiation (TBI) is a kind of external beam radiotherapy, used in conjunction with chemotherapy with the purpose of immunosuppression. Since the target in TBI is the whole body, so achieving uniform dose distribution throughout the entire body during TBI is necessary. As recommended by AAPM dose variation must be within ±10% of the prescription dose. With the evidences from literature there is limited substantiation to consider a treatment method better than others, but with regard to the size of the treatment room, workload of the radiotherapy department and prevalent technology used within each treatment department it is recommended to make the suitable and optimum method in each department. In this work, a review study was performed on different TBI techniques with the purpose of assessment and comparison of dose distribution homogeneity in these methods.
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Affiliation(s)
- E Hoseinnezhad Zarghani
- Medical Physics and Engineering Department, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - G Geraily
- Medical Physics and Engineering Department, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran; Radiation Oncology Research Center, Cancer Institute, Tehran University of Medical Sciences, Tehran, Iran.
| | - T Hadisinia
- Medical Physics and Engineering Department, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran
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Park SY, Kim JI, Joo YH, Lee JC, Park JM. Total body irradiation with a compensator fabricated using a 3D optical scanner and a 3D printer. Phys Med Biol 2017; 62:3735-3756. [PMID: 28327469 DOI: 10.1088/1361-6560/aa6866] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
We propose bilateral total body irradiation (TBI) utilizing a 3D printer and a 3D optical scanner. We acquired surface information of an anthropomorphic phantom with the 3D scanner and fabricated the 3D compensator with the 3D printer, which could continuously compensate for the lateral missing tissue of an entire body from the beam's eye view. To test the system's performance, we measured doses with optically stimulated luminescent dosimeters (OSLDs) as well as EBT3 films with the anthropomorphic phantom during TBI without a compensator, conventional bilateral TBI, and TBI with the 3D compensator (3D TBI). The 3D TBI showed the most uniform dose delivery to the phantom. From the OSLD measurements of the 3D TBI, the deviations between the measured doses and the prescription dose ranged from -6.7% to 2.4% inside the phantom and from -2.3% to 0.6% on the phantom's surface. From the EBT3 film measurements, the prescription dose could be delivered to the entire body of the phantom within ±10% accuracy, except for the chest region, where tissue heterogeneity is extreme. The 3D TBI doses were much more uniform than those of the other irradiation techniques, especially in the anterior-to-posterior direction. The 3D TBI was advantageous, owing to its uniform dose delivery as well as its efficient treatment procedure.
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Affiliation(s)
- So-Yeon Park
- Department of Radiation Oncology, Seoul National University Hospital, Seoul 03080, Republic of Korea. Institute of Radiation Medicine, Seoul National University Medical Research Center, Seoul 03080, Republic of Korea. Biomedical Research Institute, Seoul National University Hospital, Seoul 03080, Republic of Korea. Center for Convergence Research on Robotics, Advanced Institutes of Convergence Technology, Suwon 16229, Republic of Korea
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Peyraga G, Lizee T, Gustin P, Clement-Colmou K, Di Bartolo C, Supiot S, Mahe MA, François S, Mege M. Treatment of cutaneous and/or soft tissue manifestations of corticosteroids refractory chronic graft versus host disease (cGVHD) by a total nodal irradiation (TNI). Clin Transplant 2017; 31. [PMID: 28181304 DOI: 10.1111/ctr.12923] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/26/2017] [Indexed: 12/01/2022]
Abstract
The management of corticosteroids refractory chronic graft versus host disease (cGVHD) remains controversial. Retrospective analysis of patients treated at the Integrated Center of Oncology by total nodal irradiation (TNI) was performed to evaluate its therapy potency. TNI delivers a dose of 1 Gy in a single session. The delimitation of the fields is clinical (upper limit: external auditory meatus; lower limit: mid-femur). No pre-therapeutic dosimetry scanner was necessary. Evaluation of the efficacy was by clinical measures at 6 months after the treatment. Twelve patients were treated by TNI between January 2010 and December 2013. TNI was used in second-line treatment or beyond. The median time between allograft and TNI was 31.2 months, and the median time between the first manifestations of cGVHD and TNI was about 24.2 months. Of the 12 patients, nine had a clinical response at 6 months (75%), including five complete clinical responses (41.6%). Five patients could benefit from a reduction of corticosteroid doses. Three patients had hematologic toxicity. TNI could be considered as an option for the treatment of a cutaneous and/or soft tissues corticosteroids refractory cGVHD. However, prospective randomized and double-blind trials remain essential to answer the questions about TNI safety and effectiveness.
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Affiliation(s)
- Guillaume Peyraga
- Department of Radiotherapy, Integrated Center of Oncology, ICO Paul Papin, Angers, France
| | - Thibaut Lizee
- Department of Radiotherapy, Integrated Center of Oncology, ICO Paul Papin, Angers, France
| | - Pierre Gustin
- Department of Radiotherapy, Integrated Center of Oncology, ICO Paul Papin, Angers, France
| | - Karen Clement-Colmou
- Department of Radiotherapy, Integrated Center of Oncology, ICO René Gauducheau, Saint-Herblain, France
| | - Christelle Di Bartolo
- Department of Medical Physics, Integrated Center of Oncology, ICO Paul Papin, Angers, France
| | - Stephane Supiot
- Department of Radiotherapy, Integrated Center of Oncology, ICO René Gauducheau, Saint-Herblain, France
| | - Marc-Andre Mahe
- Department of Radiotherapy, Integrated Center of Oncology, ICO René Gauducheau, Saint-Herblain, France
| | - Sylvie François
- Department of Blood Diseases, University Hospital of Angers, Angers, France
| | - Martine Mege
- Department of Radiotherapy, Integrated Center of Oncology, ICO Paul Papin, Angers, France
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Lamichhane N, Patel VN, Studenski MT. Going the distance: validation of Acuros and AAA at an extended SSD of 400 cm. J Appl Clin Med Phys 2016; 17:63-73. [PMID: 27074473 PMCID: PMC5875551 DOI: 10.1120/jacmp.v17i2.5913] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Revised: 12/08/2015] [Accepted: 12/02/2015] [Indexed: 11/30/2022] Open
Abstract
Accurate dose calculation and treatment delivery is essential for total body irradiation (TBI). In an effort to verify the accuracy of TBI dose calculation at our institution, we evaluated both the Varian Eclipse AAA and Acuros algorithms to predict dose distributions at an extended source‐to‐surface distance (SSD) of 400 cm. Measurements were compared to calculated values for a 6 MV beam in physical and virtual phantoms at 400 cm SSD using open beams for both 5×5 and 40×40 cm2 field sizes. Inline and crossline profiles were acquired at equivalent depths of 5 cm, 10 cm, and 20 cm. Depth‐dose curves were acquired using EBT2 film and an ion chamber for both field sizes. Finally, a RANDO phantom was used to simulate an actual TBI treatment. At this extended SSD, care must be taken using the planning system as there is good relative agreement between measured and calculated profiles for both algorithms, but there are deviations in terms of the absolute dose. Acuros has better agreement than AAA in the penumbra region. PACS number(s): 87.55.kd
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Ahmed S, Brown D, Ahmed SBS, Kakakhel MB, Muhammad W, Hussain A. Translating bed total body irradiation lung shielding and dose optimization using asymmetric MLC apertures. J Appl Clin Med Phys 2016; 17:112-122. [PMID: 27074477 PMCID: PMC5875554 DOI: 10.1120/jacmp.v17i2.5951] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 12/17/2015] [Accepted: 12/14/2015] [Indexed: 12/25/2022] Open
Abstract
A revised translating bed total body irradiation (TBI) technique is developed for shielding organs at risk (lungs) to tolerance dose limits, and optimizing dose distribution in three dimensions (3D) using an asymmetrically‐adjusted, dynamic multileaf collimator. We present a dosimetric comparison of this technique with a previously developed symmetric MLC‐based TBI technique. An anthropomorphic RANDO phantom is CT scanned with 3 mm slice thickness. Radiological depths (RD) are calculated on individual CT slices along the divergent ray lines. Asymmetric MLC apertures are defined every 9 mm over the phantom length in the craniocaudal direction. Individual asymmetric MLC leaf positions are optimized based on RD values of all slices for uniform dose distributions. Dose calculations are performed in the Eclipse treatment planning system over these optimized MLC apertures. Dose uniformity along midline of the RANDO phantom is within the confidence limit (CL) of 2.1% (with a confidence probability p=0.065). The issue of over‐ and underdose at the interfaces that is observed when symmetric MLC apertures are used is reduced from more than ±4% to less than ±1.5% with asymmetric MLC apertures. Lungs are shielded by 20%, 30%, and 40% of the prescribed dose by adjusting the MLC apertures. Dose‐volume histogram analysis confirms that the revised technique provides effective lung shielding, as well as a homogeneous dose coverage to the whole body. The asymmetric technique also reduces hot and cold spots at lung‐tissue interfaces compared to previous symmetric MLC‐based TBI technique. MLC‐based shielding of OARs eliminates the need to fabricate and setup cumbersome patient‐specific physical blocks. PACS number(s): 87.55.‐x, 87.55.de, 87.55.D‐
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Affiliation(s)
- Shahbaz Ahmed
- Pakistan Institute of Engineering and Applied Sciences (PIEAS).
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Peters M, Taylor B, Turner E. An Evidence-Based Review of Total Body Irradiation. J Med Imaging Radiat Sci 2015; 46:442-449. [PMID: 31052126 DOI: 10.1016/j.jmir.2015.09.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Revised: 09/21/2015] [Accepted: 09/23/2015] [Indexed: 12/25/2022]
Abstract
The purpose of this literature review is to investigate clinical treatment methods of total body irradiation within the context of a clinical department adopting a paediatric cohort with no existing technique. An extensive review of the literature was conducted using PubMed, Science Direct, Google Scholar, and Clinicians Knowledge Network. Articles were limited to nonhelical tomotherapy, nonparticle therapies, and those using hyperfractionated regimes. Total marrow irradiation was excluded because of national treatment and trial limitations. Of the numerous patient positioning methods present within the literature, the most comfortable and reproducible positioning methods for total body irradiation include both supine and the supine and/or prone combination. These positions increased stability and patient comfort during treatment, while also facilitating computed tomography data acquisition at the simulation stage. Ideally, dose calculations should be performed using a three-dimensional treatment planning system and quality assurance procedures that include in vivo dosimetry measurements. The available literature also suggests inhomogeneity correction factors and intensity modulation are superior to conventional open field techniques and should be implemented within developing protocols. Dynamic machine dose modulation is suggested to reduce department impact, removing the need for tissue compensators and accessory shielding devices, while providing significant improvements to treatment time and dose accuracy. Further long-term survival and intensity modulation studies are warranted, including direct comparisons of both dose modulation and treatment efficiency.
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Affiliation(s)
- Mitchell Peters
- Queensland University of Technology, Queensland, Australia; Radiation Oncology Mater Centre South Brisbane, Queensland, Australia.
| | - Beth Taylor
- Radiation Oncology Mater Centre South Brisbane, Queensland, Australia; Queensland University of Technology, Queensland, Australia
| | - Emma Turner
- Radiation Oncology Mater Centre South Brisbane, Queensland, Australia; South Bank University, London, England
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Total body irradiation with step translation and dynamic field matching. BIOMED RESEARCH INTERNATIONAL 2013; 2013:216034. [PMID: 23956971 PMCID: PMC3713376 DOI: 10.1155/2013/216034] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/14/2013] [Accepted: 05/31/2013] [Indexed: 11/18/2022]
Abstract
The purpose of this study is to develop a total body irradiation technique that does not require additional devices or sophisticated processes to overcome the space limitation of a small treatment room. The technique aims to deliver a uniform dose to the entire body while keeping the lung dose within the tolerance level. The technique treats the patient lying on the floor anteriorly and posteriorly. For each AP/PA treatment, two complementary fields with dynamic field edges are matched over an overlapped region defined by the marks on the body surface. A compensator, a spoiler, and lung shielding blocks were used during the treatment. Moreover, electron beams were used to further boost the chest wall around the lungs. The technique was validated in a RANDO phantom using GAFCHROMIC films. Dose ratios at different body sites along the midline ranged from 0.945 to 1.076. The dose variation in the AP direction ranged from 96.0% to 104.6%. The dose distribution in the overlapped region ranged from 98.5% to 102.8%. Lateral dose profiles at abdomen and head revealed 109.8% and 111.7% high doses, respectively, at the body edges. The results confirmed that the technique is capable of delivering a uniform dose distribution to the midline of the body in a small treatment room while keeping the lung dose within the tolerance level.
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