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Fradley MG, Lefebvre B, Carver J, Cheung JW, Feigenberg SJ, Lampert R, Liu J, Rajagopalan B, Lenihan DJ. How to Manage Patients With Cardiac Implantable Electronic Devices Undergoing Radiation Therapy. JACC: CARDIOONCOLOGY 2021; 3:447-451. [PMID: 34604807 PMCID: PMC8463726 DOI: 10.1016/j.jaccao.2021.08.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 08/10/2021] [Accepted: 08/11/2021] [Indexed: 11/29/2022]
Affiliation(s)
- Michael G Fradley
- Cardio-Oncology Translational Center of Excellence, Division of Cardiology and Abramson Cancer Center, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Bénédicte Lefebvre
- Cardio-Oncology Translational Center of Excellence, Division of Cardiology and Abramson Cancer Center, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Joseph Carver
- Cardio-Oncology Translational Center of Excellence, Division of Cardiology and Abramson Cancer Center, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Jim W Cheung
- Weill Cornell Medicine, Department of Medicine, New York, New York, USA
| | - Steven J Feigenberg
- Department of Radiation Oncology, Perelman Center for Advanced Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Rachel Lampert
- Department of Medicine (Cardiovascular Disease/Electrophysiology), Yale School of Medicine, New Haven, Connecticut, USA
| | - Jennifer Liu
- Cardiology Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York, USA; Department of Medicine, Weill Cornell Medical College, New York, New York, USA
| | | | - Daniel J Lenihan
- Cardio-Oncology Center of Excellence, Washington University in St. Louis, St. Louis, Missouri, USA
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Matsubara H, Ezura T, Hashimoto Y, Karasawa K, Nishio T, Tsuneda M. Study of feasible and safe condition for total body irradiation using cardiac implantable electronic devices. JOURNAL OF RADIATION RESEARCH 2021:rrab088. [PMID: 34542633 DOI: 10.1093/jrr/rrab088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 08/09/2021] [Indexed: 06/13/2023]
Abstract
Cardiac implantable electronic devices (CIEDs) were believed to have a tolerance dose and that direct irradiation has to be avoided. Thus, no clinical guidelines have mentioned the feasibility of total body irradiation (TBI) with a CIED directly. The purpose of this work was to study a feasible and safe condition for TBI using a CIED. Eighteen CIEDs were directly irradiated by a 6-MV X-ray beam, where a non-neutron producible beam was employed for the removal of any neutron contribution to CIED malfunction. Irradiation up to 10 Gy in accumulated dose was conducted with a 100-cGy/min dose rate, followed by up to 20 Gy at 200 cGy/min. An irradiation test of whether inappropriate ventricular shock therapy was triggered or not was also performed by using a 6-MV beam of 5, 10, 20 and 40 cGy/min to two CIEDs. No malfunction was observed during irradiation up to 20 Gy at 100 and 200 cGy/min without activation of shock therapy. These results were compared with typical TBI, suggesting that a CIED in TBI will not encounter malfunction because the prescribed dose and the dose rate required for TBI are much safer than those used in this experiment. Several inappropriate shock therapies were, however, observed even at 10 cGy/min if activated. The present result suggested that TBI was feasible and safe if a non-neutron producible beam was employed at low dose-rate without activation of shock therapy, where it was not inconsistent with clinical and non-clinical data in the literature. The feasibility of TBI while using a CIED was discussed for the first time.
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Affiliation(s)
- Hiroaki Matsubara
- Department of Radiation Oncology, Tokyo Women's Medical University, Tokyo 162-8666, Japan
| | - Takatomo Ezura
- Department of Radiology, Tokyo Women's Medical University Hospital, Tokyo 162-8666, Japan
| | - Yaichiro Hashimoto
- Department of Radiation Oncology, Tokyo Women's Medical University, Tokyo 162-8666, Japan
| | - Kumiko Karasawa
- Department of Radiation Oncology, Tokyo Women's Medical University, Tokyo 162-8666, Japan
| | - Teiji Nishio
- Department of Radiation Oncology, Tokyo Women's Medical University, Tokyo 162-8666, Japan
| | - Masato Tsuneda
- Department of Radiation Oncology, Tokyo Women's Medical University, Tokyo 162-8666, Japan
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Azraai M, D'Souza D, Lin YH, Nadurata V. Current clinical practice in patients with cardiac implantable electronic devices undergoing radiotherapy: a literature review. Europace 2021; 24:362-374. [PMID: 34516616 DOI: 10.1093/europace/euab241] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Accepted: 08/25/2021] [Indexed: 12/25/2022] Open
Abstract
Patients with cardiac implantable electronic devices (CIED) undergoing radiotherapy (RT) are more common due to the ageing of the population. With newer CIEDs' implementing the complementary metal-oxide semiconductor (CMOS) technology which allows the miniaturization of CIED, it is also more susceptible to RT. Effects of RT on CIED ranges from device interference, device operational/memory errors of permanent damage. These malfunctions can cause life-threatening clinical effects. Cumulative dose is not the only component of RT that causes CIED malfunction, as neutron use and dose rate effect also affects CIEDs. The management of this patient cohort in clinical practice is inconsistent due to the lack of a consistent guideline from manufacturers and physician specialty societies. Our review will focus on the current clinical practice and the recently updated guidelines of managing patients with CIED undergoing RT. We aim to simplify the evidence and provide a simple and easy to use guide based on the recent guidelines.
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Affiliation(s)
- Meor Azraai
- Department of Cardiology, Bendigo Health, 100 Barnard Street, Bendigo, Victoria 3550, Australia
| | - Daniel D'Souza
- Department of Cardiology, Bendigo Health, 100 Barnard Street, Bendigo, Victoria 3550, Australia
| | - Yuan-Hong Lin
- Department of Cardiology, Bendigo Health, 100 Barnard Street, Bendigo, Victoria 3550, Australia
| | - Voltaire Nadurata
- Department of Cardiology, Bendigo Health, 100 Barnard Street, Bendigo, Victoria 3550, Australia
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Yang B, Yuan J, Cheung KY, Huang CY, Poon DMC, Yu SK. Magnetic Resonance-Guided Radiation Therapy of Patients With Cardiovascular Implantable Electronic Device on a 1.5 T Magnetic Resonance-Linac. Pract Radiat Oncol 2021; 12:e56-e61. [PMID: 34520872 DOI: 10.1016/j.prro.2021.08.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 08/28/2021] [Accepted: 08/31/2021] [Indexed: 11/17/2022]
Abstract
Magnetic resonance-guided radiation therapy is reported for treating patients with an insertable cardiac monitor and implantable cardiac pacemakers. All treatments were delivered using a 1.5 T MR-Linac. Among the 4 patients, 2 were treated with stereotactic body radiation therapy at a dose of 40 Gy in 5 fractions. A clinical safety protocol was developed to address the decision-making and patient selection, as well as the clarified responsibilities of different parties for management of patients with cardiovascular implantable electronic devices. Dose estimation based on out-of-field dose data are necessary for cardiovascular implantable electronic devices located outside the treatment fields.
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Affiliation(s)
- Bin Yang
- Medical Physics and Research Department, Happy Valley, Hong Kong, China.
| | - Jing Yuan
- Medical Physics and Research Department, Happy Valley, Hong Kong, China
| | - Kin Yin Cheung
- Medical Physics and Research Department, Happy Valley, Hong Kong, China
| | - Chen-Yu Huang
- Medical Physics and Research Department, Happy Valley, Hong Kong, China
| | - Darren M C Poon
- Comprehensive Oncology Centre, Hong Kong Sanatorium & Hospital, Happy Valley, Hong Kong, China
| | - Siu Ki Yu
- Medical Physics and Research Department, Happy Valley, Hong Kong, China
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Neutron and photon out-of-field doses at cardiac implantable electronic device (CIED) depths. Appl Radiat Isot 2021; 176:109895. [PMID: 34419874 DOI: 10.1016/j.apradiso.2021.109895] [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: 12/23/2020] [Revised: 08/08/2021] [Accepted: 08/08/2021] [Indexed: 11/20/2022]
Abstract
The accuracy of an out-of-field dose from an Elekta Synergy accelerator calculated using the X-ray Voxel Monte Carlo (XVMC) dose algorithm in the Monaco treatment planning system (TPS) for both low-energy (6 MV) and high-energy (15 MV) photons at cardiac implantable electronic device (CIED) depths was investigated through a comparison between MCNPX simulated out-of-field doses and measured out-of-field doses using three high spatial and sensitive active detectors. In addition, total neutron equivalent dose and fluence at CIED depths of a 15-MV dose from an Elekta Synergy accelerator were calculated, and the corresponding CIED relative neutron damage was quantified. The results showed that for 6-MV photons, the XVMC dose algorithm in Monaco underestimated out-of-field doses in all off-axis distances (average errors: -17% at distances X < 10 cm from the field edge and -31% at distances between 10 < X ≤ 16 cm from the field edge), with an increasing magnitude of underestimation for high-energy (15 MV) photons (up to 11%). According to the results, an out-of-field photon dose at a shallower CIED depth of 1 cm was associated with greater statistical uncertainty in the dose estimate compared to a CIED depth of 2 cm and clinical depth of 10 cm. Our results showed that the relative neutron damage at a CIED depth range for 15 MV photon is 36% less than that reported for 18 MV photon in the literature.
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A Review and Analysis of Managing Commonly Seen Implanted Devices for Patients Undergoing Radiation Therapy. Adv Radiat Oncol 2021; 6:100732. [PMID: 34409216 PMCID: PMC8361059 DOI: 10.1016/j.adro.2021.100732] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 03/28/2021] [Accepted: 04/19/2021] [Indexed: 11/23/2022] Open
Abstract
Purpose This review article aims to consolidate information regarding existing and emerging implanted devices used in patients undergoing radiation therapy and to categorize levels of attention needed for each device, including which devices require monitoring throughout treatment. Methods and Materials Based on the collective information from scholar searches, manufacturers' technical reports, and institutional experiences in the past years, commonly present devices in patients with cancer are compiled. This work summarizes cardiac pacemaker, implanted cardiac defibrillator, hepatic pump, intrathecal pain pump, neurostimulator, shunt, loop recorder, and mediport. Three different classifications of implanted devices can be made based on the potential effect of radiation: life-dependent, nonlife-dependent but with adverse effects if overdosed, and devices without electronic circuits. Implanted devices that contain electronic circuits that would be life-dependent or have adverse effects if overdosed, include cardiac pacemakers, implanted cardiac defibrillators, programmable hepatic pumps, pain pumps, neurostimulators, and loop recorders. Results Dose exposure to these devices need to be calculated or measured in vivo, especially for cardiac implanted devices, and they should be minimized to assure continued healthy functioning. Treatment planning techniques should be chosen to reduce entry, exit and internal scatter dose. Lower energy photon beams should be used to decrease potential neutron contamination. Implanted devices without electronic circuits are less of a concern. If a patient is life-dependent on the implanted device, it is not recommended to treat the patient with proton therapy. Conclusions This study reviewed the management of patients with commonly seen implanted devices and summarized a workflow for identifying and planning when a patient has implanted devices. Classifications of implanted devices could help clinicians make proper decisions in regard to patients with specific implanted devices. Lastly, the management of such devices in the era of the pandemic is also discussed in this review article.
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Kakino R, Nakamura M, Hu N, Iramina H, Tanaka H, Sakurai Y, Mizowaki T. Photoneutron-induced damage reduction for cardiac implantable electronic devices using neutron-shielding sheets in high-energy X-ray radiotherapy: A phantom study. Phys Med 2021; 89:151-159. [PMID: 34371340 DOI: 10.1016/j.ejmp.2021.07.036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 07/06/2021] [Accepted: 07/28/2021] [Indexed: 12/24/2022] Open
Abstract
PURPOSE To evaluate damage reduction in cardiac implantable electronic devices (CIEDs) caused by photoneutrons in high-energy X-ray radiotherapy using a neutron-shielding sheet (NSS). METHODS The NSS consists of a bolus with a thickness of 1 or 2 cm (Bls1 or Bls2) as a moderator and several absorbers (20%, 50%, or 80% B4C silicone sheet [B4C20, B4C50, or B4C80] or a 40% LiF silicone sheet [LiF40]). First, a linear accelerator (LINAC) with a water-equivalent phantom was modeled in the simulation and measured experimentally. Several NSSs were placed on the phantom, a Eu:LiCaAlF6 scintillator was placed between the phantom and the NSS, and X-rays were irradiated. The relative counts (Cr = counts when placing the NSS or Bls2) were compared between the experiment and simulation. Second, CIED damage was evaluated in the simulation. The relative damage (Dr = damage when placing or not placing the NSS) was compared among all the NSSs. In addition, the γ-ray and leaking X-ray dose from B4C was measured using a dosimetric film. After determining the optimal NSS combination, Dr value analysis was performed by changing the length of one side and the thickness. RESULTS The Cr values of the simulation and experiment agreed within a 30% percentage difference, except for Bare or LiF40-only. The Dr value was reduced by 43% when Bls2 + B4C80 was applied. The photon dose was less than 5 cGy/1500 MU. The Dr values were smaller for the smaller lengths of one side of B4C80 and decreased as the M-layer thickness increased. CONCLUSIONS The CIED damage induced by photoneutrons generated by a LINAC was effectively reduced by applying the optimal NSS.
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Affiliation(s)
- Ryo Kakino
- Division of Medical Physics, Department of Information Technology and Medical Engineering, Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Shogoin-Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan; Department of Radiation Oncology and Image-applied Therapy, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan; Japan Society for the Promotion of Science, 5-3-1 Kojimachi, Chiyoda-ku, Tokyo 102-0083, Japan
| | - Mitsuhiro Nakamura
- Division of Medical Physics, Department of Information Technology and Medical Engineering, Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Shogoin-Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan; Department of Radiation Oncology and Image-applied Therapy, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan.
| | - Naonori Hu
- Kansai BNCT Medical Center, Osaka Medical College, 2-7 Daigaku-Machi, Takatsuki, Osaka 569-8686, Japan; Institute for Integrated Radiation and Nuclear Science, Kyoto University, 2 Asashiro-nishi Kumatori-cho, Osaka 590-0494, Japan
| | - Hiraku Iramina
- Department of Radiation Oncology and Image-applied Therapy, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Hiroki Tanaka
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, 2 Asashiro-nishi Kumatori-cho, Osaka 590-0494, Japan
| | - Yoshinori Sakurai
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, 2 Asashiro-nishi Kumatori-cho, Osaka 590-0494, Japan
| | - Takashi Mizowaki
- Department of Radiation Oncology and Image-applied Therapy, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
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Wang D, Chan MF, Zambri J, Lichtenwalner P, Oliver J, Gelblum D, Parikh D. Management of a Radiation Therapy Patient With a Leadless Pacemaker. Adv Radiat Oncol 2021; 6:100726. [PMID: 34258476 PMCID: PMC8260750 DOI: 10.1016/j.adro.2021.100726] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 03/24/2021] [Accepted: 05/03/2021] [Indexed: 11/29/2022] Open
Affiliation(s)
| | | | | | | | | | - Daphna Gelblum
- Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Dhwani Parikh
- Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, New York
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Nakamura K, Aoyama T, Kaneda N, Otsuji M, Minami Y, Sakuragi A, Nakamura M. Implantable cardiac pacemaker failure by cumulative dose effects of flattening filter free beams. JOURNAL OF RADIATION RESEARCH 2021; 62:735-739. [PMID: 34036327 PMCID: PMC8273809 DOI: 10.1093/jrr/rrab041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 03/30/2021] [Indexed: 06/12/2023]
Abstract
Cumulative dose effects, which are one of the main causes of errors that occur when an implantable cardiac pacemaker (ICP) is irradiated with ionizing radiation, induce permanent failure in ICPs. Although flattening filter free (FFF) beams, which are often used in stereotactic radiotherapy, are known to have different characteristics from conventional (with flattening filter [WFF]) beams, the cumulative dose effects on ICPs with FFF beams have been under-investigated. This study investigates ICP failure induced by cumulative dose effects of FFF beams. When the ICP placed in the center of the irradiation field was irradiated with 10 MV-FFF at 24 Gy/min, the cumulative dose at which failure occurred was evaluated on the basis of the failure criteria associated with high cumulative dose as described in the American Association of Physicists in Medicine Task Group 203. The ICP failures such as a mild battery depletion at a cumulative dose of 10 Gy, pacing-output voltage change >25% at a cumulative dose of 122 Gy, and the loss of telemetry capability at cumulative dose 134 Gy were induced by cumulative dose effects. The cumulative doses by which the cumulative dose effects of FFF beams induced ICP failure were not very different from those reported in previous studies with WFF beams. Therefore, radiotherapy with FFF beams (and WFF beams) for patients with ICP requires appropriate management for minimizing the cumulative dose effects.
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Affiliation(s)
- Kazuhiko Nakamura
- Corresponding author. Kazuhiko Nakamura, Department of Radiology, Aichi Medical University Hospital, 1-1 Yazakokarimata, Nagakute, Aichi 480-1195 Japan. E-mail: ; Fax: +81-561-78-6228
| | - Takahiro Aoyama
- Department of Radiation Oncology, Aichi Cancer Center, 1-1 Kanokoden, Chikusa-Ku, Nagoya, Aichi 464-8681 Japan
- Graduate School of Medicine, Aichi Medical University, 1-1 Yazako-karimata, Nagakute, Aichi 480-1195 Japan
| | - Naoki Kaneda
- Department of Radiology, Aichi Medical University Hospital, 1-1 Yazakokarimata, Nagakute, Aichi 480-1195 Japan
| | - Masashi Otsuji
- Department of Clinical Engineering, Aichi Medical University Hospital, 1-1 Yazakokarimata, Nagakute, Aichi 480-1195 Japan
| | - Yoshitaka Minami
- Department of Radiology, Aichi Medical University Hospital, 1-1 Yazakokarimata, Nagakute, Aichi 480-1195 Japan
| | - Ami Sakuragi
- Department of Radiology, Aichi Medical University Hospital, 1-1 Yazakokarimata, Nagakute, Aichi 480-1195 Japan
| | - Masaru Nakamura
- Department of Radiology, Aichi Medical University Hospital, 1-1 Yazakokarimata, Nagakute, Aichi 480-1195 Japan
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Bjerre HL, Kronborg MB, Nielsen JC, Høyer M, Jensen MF, Zaremba T, Lægdsmand PMT, Søndergaard CS, Nyström H, Kronborg CJS. Risk of Cardiac Implantable Electronic Device Malfunctioning During Pencil Beam Proton Scanning in an In Vitro Setting. Int J Radiat Oncol Biol Phys 2021; 111:186-195. [PMID: 33845147 DOI: 10.1016/j.ijrobp.2021.03.053] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 03/08/2021] [Accepted: 03/30/2021] [Indexed: 01/08/2023]
Abstract
PURPOSE Cardiac implantable electronic devices (CIED) are sensitive to scattered secondary neutrons from proton beam irradiation. This experimental in vitro study investigated risk of CIED errors during pencil beam proton therapy. METHODS AND MATERIALS We used 62 explanted CIEDs from 4 manufacturers; 49 CIEDs were subjected to a simulated clinical protocol with daily 2 Gy relative biological effectiveness fractions prescribed to the phantom. Devices were located at 3 different lateral distances from the spread-out Bragg peak to investigate the risk of permanent or temporary device errors. Additionally, 13 devices with leads connected were monitored live during consecutive irradiations to investigate the risk of noise, over- or undersense, pace inhibition, and inappropriate shock therapy. RESULTS We detected 61 reset errors in 1728 fractions, and all except 1 CIED were reprogrammed to normal function. All, except 1 reset, occurred in devices from the same manufacturer. These were successfully reprogrammed to normal function. The 1 remaining CIED was locked in permanent safety mode. Secondary neutron dose, as estimated by Monte Carlo simulations, was found to significantly increase the odds of CIED resets by 55% per mSv. Clinically significant battery depletion was observed in 5 devices. We observed no noise, over- or undersense, pace inhibition, or inappropriate shock therapy during 362 fractions of live monitoring. CONCLUSIONS Reprogrammable CIED reset was the most commonly observed malfunction during proton therapy, and reset risk depended on secondary neutron exposure. The benefits of proton therapy are expected to outweigh the risk of CIED malfunctioning for most patients.
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Affiliation(s)
- Henrik Laurits Bjerre
- Department of Cardiology, Aarhus University Hospital, Denmark; Danish Centre for Particle Therapy, Aarhus University Hospital, Denmark.
| | | | | | - Morten Høyer
- Danish Centre for Particle Therapy, Aarhus University Hospital, Denmark
| | | | - Tomas Zaremba
- Department of Cardiology, Aalborg University Hospital, Denmark
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Lydiard, PGDip S, Blanck O, Hugo G, O’Brien R, Keall P. A Review of Cardiac Radioablation (CR) for Arrhythmias: Procedures, Technology, and Future Opportunities. Int J Radiat Oncol Biol Phys 2021; 109:783-800. [DOI: 10.1016/j.ijrobp.2020.10.036] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 10/22/2020] [Accepted: 10/27/2020] [Indexed: 10/23/2022]
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Odell DW, Albrechtsen RD, Sindt JE, Gole R, Brown S, Parsons MW, Paxton AB, Sarkar V, Lloyd S, Brogan SE, Tao R. The Effect of Measured Radiotherapy Dose on Intrathecal Drug Delivery System Function. Neuromodulation 2021; 24:1204-1208. [PMID: 33624320 DOI: 10.1111/ner.13372] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 12/15/2020] [Accepted: 01/11/2021] [Indexed: 01/07/2023]
Abstract
OBJECTIVES Radiation therapy (RT) and intrathecal drug delivery systems (IDDS) are often used concurrently to optimize pain management in patients with cancer. Concern remains among clinicians regarding the potential for IDDS malfunction in the setting of RT. Here we assessed the frequency of IDDS malfunction in a large cohort of patients treated with RT. MATERIALS AND METHODS Cancer patients with IDDS and subsequent RT at our institution from 2011 to 2019 were eligible for this study. Patients were excluded in the rare event that their IDDS was managed by an outside clinic and follow-up documentation was unavailable. Eighty-eight patients aged 22-88 years old (43% female, 57% male) representing 106 separate courses of RT were retrospectively identified. Patients received varying levels of radiation for treatment of cancer and cumulative dose to the IDDS was calculated. IDDS interrogation was subsequently performed by a pain specialist. Malfunction was recorded as deviation from the expected drug volume and/or device errors reported upon interrogation as defined by the manufacturer. RESULTS Total measured RT dose to the IDDS ranged from 0 to 18.0 Gy (median = 0.2 Gy) with median dose of 0.04 Gy/fraction (range, 0-3.2 Gy/fraction). Ten pumps received a total dose >2 Gy and three received ≥5 Gy. Eighty-two percentage of patients had follow-up with a pain specialist for IDDS interrogation and all patients underwent follow-up with a healthcare provider following RT. There were zero incidences of IDDS malfunction related to RT. No patient had clinical evidence of radiation related pump malfunction at subsequent encounters. CONCLUSIONS We found no evidence that RT in patients with IDDS led to device failure or dysfunction. While radiation oncologists and pain specialists should coordinate patient care, it does not appear that RT dose impacts the function of the IDDS to warrant significant clinical concern.
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Affiliation(s)
- Daniel W Odell
- Department of Anesthesiology, University of Utah, School of Medicine, Salt Lake City, UT, USA
| | | | - Jill E Sindt
- Department of Anesthesiology, University of Utah, School of Medicine, Salt Lake City, UT, USA
| | - Ryan Gole
- University of Utah, School of Medicine, Salt Lake City, UT, USA
| | - Spencer Brown
- University of Utah, School of Medicine, Salt Lake City, UT, USA
| | - Matthew W Parsons
- Department of Radiation Oncology, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT, USA
| | - Adam B Paxton
- Department of Radiation Oncology, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT, USA
| | - Vikren Sarkar
- Department of Radiation Oncology, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT, USA
| | - Shane Lloyd
- Department of Radiation Oncology, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT, USA
| | - Shane E Brogan
- Department of Anesthesiology, University of Utah, School of Medicine, Salt Lake City, UT, USA
| | - Randa Tao
- Department of Radiation Oncology, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT, USA
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Baehr A, Conrads L, Oertel M, Frommeyer G, Scobioala S, Eich HT, Haverkamp U. Impact of different radiation techniques and doses on cardiac implantable electronic devices. Z Med Phys 2021; 31:327-335. [PMID: 33518445 DOI: 10.1016/j.zemedi.2020.12.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 10/22/2020] [Accepted: 12/14/2020] [Indexed: 11/26/2022]
Abstract
BACKGROUND AND OBJECTIVE Purpose of this investigation was to get deeper insight into the impact of different radiation techniques and doses on cardiac implantable electric devices (CIEDs). We aimed to mimic a worst-case scenario with very high doses and external radiation being applied directly on the devices. METHODS Radiation was applied on 21 CIEDs as photon or electron therapy with maximum dose of 150Gy in fractions of 2 -20Gy. CIEDS were put directly into the beam. Brachytherapy was applied with doses of 6Gy to a maximum of 42Gy. Check-ups took place after every fraction and one week after radiation. We calculated the estimated potential risk for the health and survival of patients as well as the risk for CIEDs' loss of function. RESULTS 28 life- or health-threatening errors occurred during photon therapy, 3/7 devices showed complete loss of function. During electron therapy, 31 potentially patient-threatening errors and 2 losses of function were detected. During brachytherapy, none of the devices showed loss of function but 8 patient-threatening errors occurred. Inadequate shock releases were mostly seen after photon and brachytherapy, random noises occurred more often during electron therapy. The earliest potentially serious error occurred during after 2Gy photon radiation and 6Gy brachytherapy. Losses of function occurred earliest at 80Gy. CONCLUSION The results underline the warning for precaution concerning CIED patients derived from recommendations in the literature. Our study offers new information especially about the impact of electron radiation and brachytherapy on CIEDs. Risk for the devices to for loss of telemetry or battery capacity might be negligible with normafractionated therapy.
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Affiliation(s)
- Andrea Baehr
- Universitaetsklinikum Muenster, Department of Radiation Oncology, Albert-Schweitzer Campus 1 A, 48149, Muenster, Germany.
| | - Lino Conrads
- Universitaetsklinikum Muenster, Administration, genetics and radiation protection, Pottkamp 17, 48149. Muenster, Germany
| | - Michael Oertel
- Universitaetsklinikum Muenster, Department of Radiation Oncology, Albert-Schweitzer Campus 1 A, 48149, Muenster, Germany
| | - Gerrit Frommeyer
- Universitaetsklinikum Muenster, Clinic for Cardiology II - Electrophysiology, Albert-Schweitzer Campus 1 A, 48149, Muenster, Germany
| | - Sergiu Scobioala
- Universitaetsklinikum Muenster, Department of Radiation Oncology, Albert-Schweitzer Campus 1 A, 48149, Muenster, Germany
| | - Hans Th Eich
- Universitaetsklinikum Muenster, Department of Radiation Oncology, Albert-Schweitzer Campus 1 A, 48149, Muenster, Germany
| | - Uwe Haverkamp
- Universitaetsklinikum Muenster, Department of Radiation Oncology, Albert-Schweitzer Campus 1 A, 48149, Muenster, Germany
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Levis M, Andreis A, Badellino S, Budano C, Caivano D, Cerrato M, Orlandi E, Bissolino A, Angelico G, Cavallin C, Giglioli FR, De Ferrari GM, Ricardi U. Safety of lung stereotactic ablative radiotherapy for the functioning of cardiac implantable electronic devices. Radiother Oncol 2021; 156:193-198. [PMID: 33387584 DOI: 10.1016/j.radonc.2020.12.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 12/21/2020] [Indexed: 12/25/2022]
Abstract
BACKGROUND AND PURPOSE The prevalence of patients with a cardiac implantable device (CIED) developing cancer and requiring a course of radiotherapy (RT) is increasing remarkably. Previously published reports agree that standard and conventionally fractionated RT is usually safe for CIEDs, but no "in-vivo" reports are available on the potential effects of thoracic stereotactic ablative radiotherapy (SABR) regimens to CIEDs functioning. The purpose of our study is therefore to evaluate the effects of SABR on CIEDs (pacemakers [PM] or implantable cardiac defibrillators [ICD]) in a cohort of patients affected by primary or metastatic lung lesions. MATERIALS AND METHODS We retrospectively collected all CIED-bearing patients undergoing SABR between 2007 and 2019 at our Institution. All CIEDs were interrogated before and after the SABR course to check for any malfunction. Prescription dose, beam energy and maximum dose (Dmax) to CIEDs were retrieved for each patient. Electrical records of the CIEDs were reviewed by the medical records. RESULTS Thirty-four consecutive patients (24 with a PM and 10 with an ICD), who underwent 38 separate SABR courses, were included in the study. Eight patients (24%) were PM-dependent. Prescription dose of SABR ranged 26-60 Gy in 1-8 fractions, with a photon energy ranging 6-to-10 MV (76.3% and 23.7%, respectively) and a median Dmax to CIEDs of 0.17 Gy (range 0.04-1.97 Gy). Electrical parameters were stable in post-treatment device programming visits and no transient or persistent alteration of the CIED function was recorded in any patient. No inappropriate interventions were recorded in the 10 ICD-bearing patients during the treatment fractions. CONCLUSIONS Thoracic SABR proved to be safe for CIEDs when the dose is kept <2 Gy and the beam energy is ≤10 MV, irrespective of the pacing-dependency and of the CIED type.
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Affiliation(s)
- Mario Levis
- Department of Oncology, University of Torino, Italy.
| | - Alessandro Andreis
- Division of Cardiology, Department of Medical Sciences, "Città della Salute e della Scienza di Torino" Hospital, University of Torino, Italy
| | | | - Carlo Budano
- Division of Cardiology, Department of Medical Sciences, "Città della Salute e della Scienza di Torino" Hospital, University of Torino, Italy
| | | | | | | | - Arianna Bissolino
- Division of Cardiology, Department of Medical Sciences, "Città della Salute e della Scienza di Torino" Hospital, University of Torino, Italy
| | - Gloria Angelico
- Division of Cardiology, Department of Medical Sciences, "Città della Salute e della Scienza di Torino" Hospital, University of Torino, Italy
| | | | | | - Gaetano M De Ferrari
- Division of Cardiology, Department of Medical Sciences, "Città della Salute e della Scienza di Torino" Hospital, University of Torino, Italy
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Mathew F, Makdessi GA, Montgomery L, Evans M, Kildea J. The impact of treatment parameter variation on secondary neutron spectra in high-energy electron beam radiotherapy. Phys Med 2020; 80:125-133. [DOI: 10.1016/j.ejmp.2020.10.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 10/01/2020] [Accepted: 10/22/2020] [Indexed: 12/28/2022] Open
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Delana A, Barbareschi A, Consorti R, Daniela Falco M. Dose calculation accuracy in proximity of a pacemaker: A multicenter study with threecommercial treatment planning systems. Phys Med 2020; 80:201-208. [DOI: 10.1016/j.ejmp.2020.10.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 10/02/2020] [Accepted: 10/22/2020] [Indexed: 11/16/2022] Open
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Jurado-Bruggeman D, Muñoz-Montplet C, Vilanova JC. A new dose quantity for evaluation and optimisation of MV photon dose distributions when using advanced algorithms: proof of concept and potential applications. Phys Med Biol 2020; 65:235020. [PMID: 32906107 DOI: 10.1088/1361-6560/abb6bc] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Advanced algorithms used in MV photon radiotherapy model radiation transport in any media. They represent a step forward but introduce new uncertainties and questions, including whether to report the doses to water (Dw,m) or medium (Dm,m) voxels, and the impact of fluence changes introduced by surrounding media. These aspects can compromise consistency between both reporting modes and with previous algorithms in which clinical experience is based. This study introduces a new dose quantity, the dose-to-reference-like medium, to overcome the aforementioned shortcomings. It is linked to a reference medium, water in this study (Dw,m*), and defined as the absorbed dose in a voxel of this reference medium surrounded by a reference-like medium with the same radiation transport characteristics as the original one. We propose to derive Dw,m* distributions by post-processing Dw,m or Dm,m applying a correction factor (CF) to each voxel which depends on its composition. We present and justify a simple and straightforward method to obtain CFs that only involves two phantoms with the same density: one with the considered composition and the other with that of the reference medium. A proof of concept was performed in a clinical environment for Acuros XB (AXB) advanced algorithm and 6 MV photon beams. The CFs were derived for the tissues characterised in Acuros. Dw,m* was compared to Dw,m, Dm,m, and Dw,w from AAA analytical algorithm for some virtual and clinical cases. All the previous quantities presented limitations that can be solved by Dw,m*. This new quantity allows the applicability of evaluation parameters, traceability to clinical experience, and isolation of heterogeneity effects to identify optimum plans, offering useful characteristics for plan evaluation and optimisation in clinical practice. Additionally, it also has potential applications in automated treatment planning and multi-centre activities such as clinical trials, audits, benchmarking, and shared models for automation.
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Affiliation(s)
- Diego Jurado-Bruggeman
- Medical Physics and Radiation Protection Department, Institut Català d'Oncologia, Girona, Spain
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Farr JB, Moyers MF, Allgower CE, Bues M, Hsi WC, Jin H, Mihailidis DN, Lu HM, Newhauser WD, Sahoo N, Slopsema R, Yeung D, Zhu XR. Clinical commissioning of intensity-modulated proton therapy systems: Report of AAPM Task Group 185. Med Phys 2020; 48:e1-e30. [PMID: 33078858 DOI: 10.1002/mp.14546] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 08/17/2020] [Accepted: 08/18/2020] [Indexed: 02/06/2023] Open
Abstract
Proton therapy is an expanding radiotherapy modality in the United States and worldwide. With the number of proton therapy centers treating patients increasing, so does the need for consistent, high-quality clinical commissioning practices. Clinical commissioning encompasses the entire proton therapy system's multiple components, including the treatment delivery system, the patient positioning system, and the image-guided radiotherapy components. Also included in the commissioning process are the x-ray computed tomography scanner calibration for proton stopping power, the radiotherapy treatment planning system, and corresponding portions of the treatment management system. This commissioning report focuses exclusively on intensity-modulated scanning systems, presenting details of how to perform the commissioning of the proton therapy and ancillary systems, including the required proton beam measurements, treatment planning system dose modeling, and the equipment needed.
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Affiliation(s)
- Jonathan B Farr
- Department of Medical Physics, Applications of Detectors and Accelerators to Medicine, Meyrin, 1217, Switzerland
| | | | - Chris E Allgower
- Richard L. Roudebush VA Medical Center, Indianapolis, IN, 46202, USA
| | - Martin Bues
- Department of Radiation Oncology, Mayo Clinic, Scottsdale, AZ, 85259, USA
| | - Wen-Chien Hsi
- University of Florida Proton Therapy Institute, University of Florida, Jacksonville, FL, 32206, USA
| | - Hosang Jin
- Department of Radiation Oncology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73104, USA
| | - Dimitris N Mihailidis
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Hsiao-Ming Lu
- Department of Radiation Oncology, Hefei Ion Medical Center, 1700 Changning Avenue, Gaoxin District, Hefei, Anhui, 230088, China
| | - Wayne D Newhauser
- Department of Physics & Astronomy, Louisiana State University, Baton Rouge, LA, 70803, USA.,Mary Bird Perkins Cancer Center, Baton Rouge, LA, 70809, USA
| | - Narayan Sahoo
- Department of Radiation Physics, University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Roelf Slopsema
- Department of Radiation Oncology, Emory Proton Therapy Center, Emory University, Atlanta, GA, 30322, USA
| | - Daniel Yeung
- Saudi Proton Therapy Center, King Fahad Medical City, Riyadh, Riyadh Province, 11525, Saudi Arabia
| | - X Ronald Zhu
- Department of Radiation Physics, University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
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Gauter-Fleckenstein B, Barthel C, Büttner S, Wenz F, Borggrefe M, Tülümen E. Effectivity and applicability of the German DEGRO/DGK-guideline for radiotherapy in CIED-bearing patients. Radiother Oncol 2020; 152:208-215. [DOI: 10.1016/j.radonc.2020.01.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 12/07/2019] [Accepted: 01/07/2020] [Indexed: 11/26/2022]
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Olaciregui-Ruiz I, Beddar S, Greer P, Jornet N, McCurdy B, Paiva-Fonseca G, Mijnheer B, Verhaegen F. In vivo dosimetry in external beam photon radiotherapy: Requirements and future directions for research, development, and clinical practice. Phys Imaging Radiat Oncol 2020; 15:108-116. [PMID: 33458335 PMCID: PMC7807612 DOI: 10.1016/j.phro.2020.08.003] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 08/17/2020] [Accepted: 08/18/2020] [Indexed: 11/18/2022] Open
Abstract
External beam radiotherapy with photon beams is a highly accurate treatment modality, but requires extensive quality assurance programs to confirm that radiation therapy will be or was administered appropriately. In vivo dosimetry (IVD) is an essential element of modern radiation therapy because it provides the ability to catch treatment delivery errors, assist in treatment adaptation, and record the actual dose delivered to the patient. However, for various reasons, its clinical implementation has been slow and limited. The purpose of this report is to stimulate the wider use of IVD for external beam radiotherapy, and in particular of systems using electronic portal imaging devices (EPIDs). After documenting the current IVD methods, this report provides detailed software, hardware and system requirements for in vivo EPID dosimetry systems in order to help in bridging the current vendor-user gap. The report also outlines directions for further development and research. In vivo EPID dosimetry vendors, in collaboration with users across multiple institutions, are requested to improve the understanding and reduce the uncertainties of the system and to help in the determination of optimal action limits for error detection. Finally, the report recommends that automation of all aspects of IVD is needed to help facilitate clinical adoption, including automation of image acquisition, analysis, result interpretation, and reporting/documentation. With the guidance of this report, it is hoped that widespread clinical use of IVD will be significantly accelerated.
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Affiliation(s)
- Igor Olaciregui-Ruiz
- Department of Radiation Oncology, Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - Sam Beddar
- Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Peter Greer
- Calvary Mater Newcastle Hospital and University of Newcastle, Newcastle, New South Wales, Australia
| | - Nuria Jornet
- Servei de Radiofísica i Radioprotecció, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Boyd McCurdy
- Medical Physics Department, CancerCare Manitoba, Winnipeg, Manitoba, Canada
| | - Gabriel Paiva-Fonseca
- Department of Radiation Oncology (Maastro), GROW School for Oncology, Maastricht University Medical Centre+, Maastricht, the Netherlands
| | - Ben Mijnheer
- Department of Radiation Oncology, Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - Frank Verhaegen
- Department of Radiation Oncology (Maastro), GROW School for Oncology, Maastricht University Medical Centre+, Maastricht, the Netherlands
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Falco MD, Genovesi D, Caravatta L, Di Carlo C, Bliakharskaia E, Appignani M, Faustino M, Furia N, Di Girolamo E. A randomized in vitro evaluation of transient and permanent cardiac implantable electronic device malfunctions following direct exposure up to 10 Gy. Strahlenther Onkol 2020; 197:198-208. [PMID: 32561941 DOI: 10.1007/s00066-020-01651-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 06/01/2020] [Indexed: 10/24/2022]
Abstract
BACKGROUND AND PURPOSE High-dose 6‑MV radiotherapy may cause cardiac implantable electronic devices (CIEDs) to malfunction. To assess CIED malfunctions resulting from direct exposure up to 10 Gy, 100 pacemakers (PMs) and 40 implantable cardioverter-defibrillators (ICDs) were evaluated. MATERIALS AND METHODS CIEDs underwent baseline interrogation. In ICDs, antitachycardia therapies were disabled via the programmer while the detection windows were left enabled. A computed tomography (CT) scan was performed to build the corresponding treatment plan. CIEDs were "blinded" and randomized to receive single doses of either 2, 5, or, 10 Gy via a 6-MV linear accelerator (linac) in a water phantom. Twenty-two wireless telemetry-enabled CIEDs underwent a real-time session, and their function was recorded by the video camera in the bunker. The CIEDs were interrogated after exposure and once monthly for 6 months. RESULTS During exposure, regardless of dose, 90.9% of the CIEDs recorded electromagnetic interference, with 6 ICDs (27.3%) reporting pacing inhibition and inappropriate arrhythmia detections. After exposure, a backup reset was observed in 1 PM (0.7% overall, 1% among PMs), while 7 PMs (5% overall, 7% among PMs) reported battery issues (overall immediate malfunction rate was 5.7%). During follow-up, 4 PMs (2.9% overall; 4% among PMs) and 1 ICD (0.7% overall; 2.5% among ICDs) reported abnormal battery depletion, and 1 PM (0.7% overall; 1% among PMs) reported a backup reset (overall late malfunction rate was 4.3%). CONCLUSION Apart from transient electromagnetic interference, last-generation CIEDs withstood direct 6‑MV exposure up to 10 Gy. Permanent battery or software errors occurred immediately or later only in less recent CIEDs.
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Affiliation(s)
- Maria Daniela Falco
- Department of Radiation Oncology, "SS. Annunziata" Hospital, "G. D'Annunzio" University, Via De' Vestini, 66100, Chieti, Italy.
| | - Domenico Genovesi
- Department of Radiation Oncology, "SS. Annunziata" Hospital, "G. D'Annunzio" University, Via De' Vestini, 66100, Chieti, Italy
| | - Luciana Caravatta
- Department of Radiation Oncology, "SS. Annunziata" Hospital, "G. D'Annunzio" University, Via De' Vestini, 66100, Chieti, Italy
| | - Clelia Di Carlo
- Department of Radiation Oncology, "SS. Annunziata" Hospital, "G. D'Annunzio" University, Via De' Vestini, 66100, Chieti, Italy
| | - Ekaterina Bliakharskaia
- Department of Clinical Medicine, Public Health, Life and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | | | | | - Nanda Furia
- Arrhythmology Unit, "SS. Annunziata" Hospital, Chieti, Italy
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Aslian H, Kron T, Watts T, Akalanli C, Hardcastle N, Lonski P, Montaseri A, Hay B, Korte J, Berk K, Longo F, Severgnini M. The effect of stereotactic body radiotherapy (SBRT) using flattening filter-free beams on cardiac implantable electronic devices (CIEDs) in clinical situations. J Appl Clin Med Phys 2020; 21:121-131. [PMID: 32277741 PMCID: PMC7324704 DOI: 10.1002/acm2.12873] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2019] [Revised: 03/05/2020] [Accepted: 03/12/2020] [Indexed: 11/23/2022] Open
Abstract
PURPOSE This study focused on determining risks from stereotactic radiotherapy using flattening filter-free (FFF) beams for patients with cardiac implantable electronic device (CIEDs). Two strategies were employed: a) a retrospective analysis of patients with CIEDs who underwent stereotactic radiosurgery (SRS)/SBRT at the Peter MacCallum Cancer Centre between 2014 and 2018 and b) an experimental study on the impact of FFF beams on CIEDs. METHODS A retrospective review was performed. Subsequently, a phantom study was performed using 30 fully functional explanted CIEDs from two different manufacturers. Irradiation was carried out in a slab phantom with 6-MV and 10-MV FFF beams. First, a repetition-rate test (RRT) with a range of beam pulse frequencies was conducted. Then, multifraction SBRT (48 Gy/4 Fx) and single-fraction SBRT (28 Gy/1 Fx) treatment plans were used for lung tumors delivered to the phantom. RESULTS Between 2014 and 2018, 13 cases were treated with an FFF beam (6 MV, 1400 MU/min or 10 MV, 2400 MU/min), and 15 cases were treated with a flattening filter (FF) beam (6 MV, 600 MU/min). All the devices were positioned outside the treatment field at a distance of more than 5 cm, except for one case, and no failures were reported due to SBRT/SRS. In the phantom rep-rate tests, inappropriate sensing occurred, starting at a rep-rate of 1200 MU/min. Cardiac implantable electronic device anomalies during and after delivering VMAT-SBRT with a 10-MV FFF beam were observed. CONCLUSIONS The study showed that caution should be paid to managing CIED patients when they undergo SBRT using FFF beams, as it is recommended by AAPM TG-203. Correspondingly, it was found that for FFF beams although there is small risk from dose-rate effects, delivering high dose of radiation with beam energy greater than 6 MV and high-dose rate to CIEDs positioned in close vicinity of the PTV may present issues.
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Affiliation(s)
| | - Tomas Kron
- Physical SciencesPeter MacCallum Cancer CentreMelbourneAustralia
| | - Troy Watts
- Department of CardiologyRoyal Melbourne HospitalMelbourneAustralia
| | - Cagla Akalanli
- Physical SciencesPeter MacCallum Cancer CentreMelbourneAustralia
| | | | - Peta Lonski
- Physical SciencesPeter MacCallum Cancer CentreMelbourneAustralia
| | - Atousa Montaseri
- Physical SciencesPeter MacCallum Cancer CentreMelbourneAustralia
| | - Barry Hay
- Physical SciencesPeter MacCallum Cancer CentreMelbourneAustralia
| | - James Korte
- Physical SciencesPeter MacCallum Cancer CentreMelbourneAustralia
| | - Kemal Berk
- Physical SciencesPeter MacCallum Cancer CentreMelbourneAustralia
| | - Francesco Longo
- Department of PhysicsUniversity of TriesteTriesteItaly
- Italian National Institute of Nuclear Physics (INFN)sezione di TriesteTriesteItaly
| | - Mara Severgnini
- Department of Medical PhysicsAzienda Sanitaria Universitaria Integrata di TriesteTriesteItaly
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Nakamura K, Aoyama T, Kaneda N, Otsuji M, Minami Y, Sakuragi A, Nakamura M. Effect of X-ray dose rates higher than 8 Gy/min on the functioning of cardiac implantable electronic devices. JOURNAL OF RADIATION RESEARCH 2020; 61:419-425. [PMID: 32253430 PMCID: PMC7299257 DOI: 10.1093/jrr/rraa016] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 12/12/2019] [Accepted: 03/05/2020] [Indexed: 06/11/2023]
Abstract
Direct irradiation may cause malfunctioning of cardiac implantable electronic devices (CIEDs). Therefore, a treatment plan that does not involve direct irradiation of CIEDs should be formulated. However, CIEDs may be directly exposed to radiation because of the sudden intrafractional movement of the patient. The probability of CIED malfunction reportedly depends on the dose rate; however, reports are only limited to dose rates ≤8 Gy/min. The purpose of this study was to investigate the effect of X-ray dose rates >8 Gy/min on CIED function. Four CIEDs were placed at the center of the radiation field and irradiated using 6 MV X-ray with flattening filter free (6 MV FFF) and 10 MV X-ray with flattening filter free (10 MV FFF). The dose rate was 4-14 Gy/min for the 6 MV FFF and 4-24 Gy/min for 10 MV FFF beams. CIED operation was evaluated with an electrocardiogram during each irradiation. Three CIEDs malfunctioned in the 6 MV FFF condition, and all four CIEDs malfunctioned in the 10 MV FFF condition, when the dose rate was >8 Gy/min. Pacing inhibition was the malfunction observed in all four CIEDs. Malfunction occurred simultaneously along with irradiation and simultaneously returned to normal function on stopping the irradiation. An X-ray dose rate >8 Gy/min caused a temporary malfunction due to interference. Therefore, clinicians should be aware of the risk of malfunction and manage patient movement when an X-ray dose rate >8 Gy/min is used for patients with CIEDs.
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Affiliation(s)
- Kazuhiko Nakamura
- Department of Radiology, Aichi Medical University Hospital, 1-1 Yazakokarimata, Nagakute, Aichi, 480-1195 Japan
| | - Takahiro Aoyama
- Department of Radiation Oncology, Aichi Cancer Center, 1-1 Kanokoden, Chikusa-Ku, Nagoya, Aichi, 464-8681 Japan
| | - Naoki Kaneda
- Department of Radiology, Aichi Medical University Hospital, 1-1 Yazakokarimata, Nagakute, Aichi, 480-1195 Japan
| | - Masashi Otsuji
- Department of Clinical Engineering, Aichi Medical University Hospital, 1-1 Yazakokarimata, Nagakute, Aichi, 480-1195 Japan
| | - Yoshitaka Minami
- Department of Radiology, Aichi Medical University Hospital, 1-1 Yazakokarimata, Nagakute, Aichi, 480-1195 Japan
| | - Ami Sakuragi
- Department of Radiology, Aichi Medical University Hospital, 1-1 Yazakokarimata, Nagakute, Aichi, 480-1195 Japan
| | - Masaru Nakamura
- Department of Radiology, Aichi Medical University Hospital, 1-1 Yazakokarimata, Nagakute, Aichi, 480-1195 Japan
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Radiotherapy is safe in patients with implantable cardiac devices. Analysis of a systematic interrogation follow-up. Clin Transl Oncol 2020; 22:2286-2292. [PMID: 32419111 DOI: 10.1007/s12094-020-02374-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 05/01/2020] [Indexed: 10/24/2022]
Abstract
INTRODUCTION The number of patients who have a cardiac implantable electronic device (CIEDs) that undergo a course of radiotherapy is increasing due to the ageing population. The majority of clinical studies only evaluate any CIED malfunction at the end of a course of irradiation or in a case of there being symptoms of possible malfunction. As a result, little data has been collected on CIED status acquired during an active course of irradiation. MATERIAL AND METHODS We aimed to evaluate the correct functioning of a CIED during a course of radiotherapy. So, a retrospective analysis was made of all patients having CIEDS in a single institution during their course of radiotherapy. All CIEDs were systematically checked before and during the course of radiotherapy according to the risk of device failure and patient dependence. RESULTS Data was analysed from 56 patients (43 men, 13 women) with a mean age of 78.2 years, of whom 87.5% of the patients carried a pacemaker (PM), the 39% of the patients were PM dependent, and the remaining patients carried an implantable cardioverter-defibrillator (ICD). An observable dose of irradiation was evident in only 10 cases. 69.1% of the CIEDs were checked daily and the remainder were checked weekly. During the radiotherapy course, 82% of the patients did not complain of any cardiological event. The CIED of five patients experienced an increase in the threshold and, in another case, a sudden reduction in the duration of the battery was reported. Another patient with a CIED experienced a cardiac insufficiency episode triggered by a ventricular tachycardia. CONCLUSION In conclusions, although adverse clinical events from exposure of a CIED to irradiation are rare, they can appear in any group of risk. No dose-dependency was observed on the malfunction of the CIED.
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Gauter-Fleckenstein B, Nguyen J, Jahnke L, Gaiser T, Rudic B, Büttner S, Wenz F, Borggrefe M, Tülümen E. Interaction between CIEDs and modern radiotherapy techniques: Flattening filter free-VMAT, dose-rate effects, scatter radiation, and neutron-generating energies. Radiother Oncol 2020; 152:196-202. [PMID: 31973882 DOI: 10.1016/j.radonc.2019.12.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Revised: 12/07/2019] [Accepted: 12/12/2019] [Indexed: 10/25/2022]
Abstract
BACKGROUND AND PURPOSE Providing evidence for radiotherapy (RT)-induced effects on cardiac implantable electric devices (CIEDs) with focus on flattening filter free-volumetric modulated arc therapy (FFF-VMAT) at 6 and 10 MV as well as 3D-conformal radiotherapy (3D-CRT) at 18 MV. MATERIALS AND METHODS 68 CIEDs (64 implantable cardioverter-defibrillators (ICDs) and 4 cardiac pacemakers (PMs)) were located on the left chest position on a slab phantom and irradiated under telemetrical surveillance either directly, or distant to 3D-CRT or FFF-VMAT, dose-rate 2500 cGy/min, and target dose of 150 Gy. Devices were placed within, close by (2.5 cm and 5 cm), and distant (35 cm) to the radiation field. Scatter radiation (SR) and photon neutrons (PN) were recorded. CIEDs were investigated in following groups: 1a) 18 MV 3D-CRT - 4 ICDs/4 PMs out of radiation field, 1b) 18 MV open field - 4 ICDs/4 PMs within radiation field, 2) 6 MV FFF-VMAT, 15 ICDs in 35 cm distance to VMAT, 3) 10 MV-FFF VMAT, 15 ICDs in 35 cm distance to VMAT, 4) 6 MV FFF-VMAT, 15 ICDs in 2.5 cm distance to VMAT, 5) 10 MV FFF-VMAT, 15 ICDs in 2.5 cm distance to VMAT. RESULTS No incidents occurred at 6 MV FFF. 10 MV FFF-VMAT and 18 MV 3D-CRT resulted in data loss, reset, and erroneous sensing with inhibition of pacing (leading to inadequate defibrillation) in 8/34 ICDs and 2/4 PMs which were not located within radiation. Direct radiation triggered instantaneous defibrillation in 3/4 ICDs. CONCLUSIONS 6 MV FFF-VMAT is safe even at high dose-rates of 2500 cGy/min, regardless whether CIEDs are located close (2.5 cm) or distant (35 cm) to the radiation beam. CIEDs should never be placed within radiation and energy should always be limited to 6 MV. At 6 MV, VMAT at high dose-rates can be used to treat tumors, which are located close to CIEDs.
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Affiliation(s)
- Benjamin Gauter-Fleckenstein
- Department of Radiation Oncology, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Germany.
| | - Julia Nguyen
- Medical Faculty Mannheim, Heidelberg University, Germany
| | - Lennart Jahnke
- Department of Radiation Oncology, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Germany
| | - Timo Gaiser
- Institute of Pathology, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Germany
| | - Boris Rudic
- First Department of Medicine, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Germany; DZHK (German Centre for Cardiovascular Research) partner site, Mannheim, Germany
| | - Sylvia Büttner
- Department of Biomathematics and Medical Statistics, University Medical Center Mannheim, University of Heidelberg, Germany
| | - Frederik Wenz
- Department of Radiation Oncology, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Germany
| | - Martin Borggrefe
- First Department of Medicine, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Germany; DZHK (German Centre for Cardiovascular Research) partner site, Mannheim, Germany
| | - Erol Tülümen
- First Department of Medicine, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Germany; DZHK (German Centre for Cardiovascular Research) partner site, Mannheim, Germany
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