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Forbrig R, Ozpeynirci Y, Fischer TD, Trumm CG, Liebig T, Stahl R. Radiation Dose and Fluoroscopy Time of Extracranial Carotid Artery Stenting : Elective vs. Emergency Treatment Including Combined Mechanical Thrombectomy in Tandem Occlusion. Clin Neuroradiol 2023; 33:843-853. [PMID: 37261451 PMCID: PMC10449680 DOI: 10.1007/s00062-023-01288-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 03/24/2023] [Indexed: 06/02/2023]
Abstract
PURPOSE Fluoroscopically guided endovascular carotid artery stenting (CAS) of extracranial carotid stenosis (ECS) is a reasonable alternative to carotid endarterectomy in selected patients. Diagnostic reference levels (DRL) for this common neurointervention have not yet been defined and respective literature data are sparse. We provide detailed dosimetrics for useful expansion of the DRL catalogue. METHODS A retrospective single-center study of patients undergoing CAS between 2013 and 2021. We analyzed dose area product (DAP) and fluoroscopy time considering the following parameters: indications for CAS, semielective/elective versus emergency including additional mechanical thrombectomy (MT) in extracranial/intracranial tandem occlusion, etiology of ECS (atherosclerotic vs. radiation-induced), periprocedural features, e.g., number of applied stents, percutaneous transluminal angioplasty (PTA) and MT maneuvers, and dose protocol. Local DRL was defined as 75% percentile of the DAP distribution. RESULTS A total of 102 patients were included (semielective/elective CAS n = 75, emergency CAS n = 8, CAS + MT n = 19). Total median DAP was 78.2 Gy cm2 (DRL 117 Gy cm2). Lowest and highest median dosimetry values were documented for semielective/elective CAS and CAS + MT (DAP 49.1 vs. 146.8 Gy cm2, fluoroscopy time 27.1 vs. 43.8 min; p < 0.005), respectively. Dosimetrics were significantly lower in patients undergoing 0-1 PTA maneuvers compared to ≥ 2 maneuvers (p < 0.05). Etiology of ECS, number of stents and MT maneuvers had no significant impact on dosimetry values (p > 0.05). A low-dose protocol yielded a 33% reduction of DAP. CONCLUSION This CAS study suggests novel local DRLs for both elective and emergency cases with or without intracranial MT. A dedicated low-dose protocol was suitable for substantial reduction of radiation dose.
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Affiliation(s)
- Robert Forbrig
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistr. 15, 81377 Munich, Germany
| | - Yigit Ozpeynirci
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistr. 15, 81377 Munich, Germany
| | - Thomas David Fischer
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistr. 15, 81377 Munich, Germany
| | - Christoph G. Trumm
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistr. 15, 81377 Munich, Germany
| | - Thomas Liebig
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistr. 15, 81377 Munich, Germany
| | - Robert Stahl
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistr. 15, 81377 Munich, Germany
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Tristram J, Steuwe A, Kröpil F, Thomas C, Rubbert C, Antoch G, Boos J. Typical doses and typical values for fluoroscopic diagnostic and interventional procedures. JOURNAL OF RADIOLOGICAL PROTECTION : OFFICIAL JOURNAL OF THE SOCIETY FOR RADIOLOGICAL PROTECTION 2022; 42:021510. [PMID: 35130526 DOI: 10.1088/1361-6498/ac5294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 02/07/2022] [Indexed: 06/14/2023]
Abstract
To implement typical doses (TD) and typical values (TV) for fluoroscopic diagnostic and interventional procedures. A total of 3811 fluoroscopic procedures performed within 34 months on three devices were included in this retrospective study. Dose-, patient- and procedure-related information were extracted using the institutional dose management system (DMS). TD/TV were defined as median dose and calculated for the five most frequent procedures per device for dose area product (DAP), cumulative air kerma (CAK) and fluoroscopy time (FT). National diagnostic reference levels and other single facility studies were compared to our results. Additionally, the five procedures with the highest doses of each device were analysed. To evaluate the data coverage of the DMS compared to the picture archiving and communication system (PACS), procedure lists were extracted from the PACS and compared to the procedure information extracted from the DMS. TD/TV for 15 procedures were implemented. Among all devices, TD for DAP ranged between 0.6 Gycm2for port catheter control (n= 64) and 145.9 Gycm2for transarterial chemoembolisation (n= 84). TD for CAK ranged between 5 mGy for port catheter control and 1397 mGy for aneurysm treatment (n= 129) and TV for FT ranged between 0.3 min for upper cavography (n= 67) and 51.4 min for aneurysm treatment. TD for DAP and CAK were lower or within the range of other single facility studies. The five procedures with the highest median DAP per device were identified, 6 of 15 procedures were also found to be among the most frequent procedures. Data coverage of the DMS compared to the PACS ranged between 71% (device 2, stroke treatment) and 78% (device 1, lower limb angiography) for the most common procedure per device. Thus, in 22%-29% of cases dose data of the performed procedure was not transferred into the DMS. We implemented TD/TV for fluoroscopic diagnostic and interventional procedures which enable a comprehensive dose analysis and comparison with previously published values.
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Affiliation(s)
- Juliana Tristram
- Medical Faculty, Department of Diagnostic and Institutional Radiology, University Dusseldorf, D-40225 Dusseldorf, Germany
| | - Andrea Steuwe
- Medical Faculty, Department of Diagnostic and Institutional Radiology, University Dusseldorf, D-40225 Dusseldorf, Germany
| | - Feride Kröpil
- Medical Faculty, Department of Surgery, University Dusseldorf, D-40225 Dusseldorf, Germany
| | - Christoph Thomas
- Medical Faculty, Department of Diagnostic and Institutional Radiology, University Dusseldorf, D-40225 Dusseldorf, Germany
| | - Christian Rubbert
- Medical Faculty, Department of Diagnostic and Institutional Radiology, University Dusseldorf, D-40225 Dusseldorf, Germany
| | - Gerald Antoch
- Medical Faculty, Department of Diagnostic and Institutional Radiology, University Dusseldorf, D-40225 Dusseldorf, Germany
| | - Johannes Boos
- Medical Faculty, Department of Diagnostic and Institutional Radiology, University Dusseldorf, D-40225 Dusseldorf, Germany
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Opitz M, Zensen S, Bos D, Li Y, Styczen H, Wetter A, Guberina N, Jabbarli R, Sure U, Forsting M, Wanke I, Deuschl C. Radiation exposure in the endovascular therapy of cranial and spinal dural arteriovenous fistula in the last decade: a retrospective, single-center observational study. Neuroradiology 2022; 64:587-595. [PMID: 34570252 PMCID: PMC8850286 DOI: 10.1007/s00234-021-02816-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Accepted: 09/08/2021] [Indexed: 11/30/2022]
Abstract
PURPOSE This study aims to determine local diagnostic reference levels (DRLs) in the endovascular therapy (EVT) of patients with cranial and spinal dural arteriovenous fistula (dAVF). METHODS In a retrospective study design, DRLs and achievable dose (AD) were assessed for all patients with cranial and spinal dAVF undergoing EVT (I) or diagnostic angiography (II). All procedures were performed at the flat-panel angiography-system Allura Xper (Philips Healthcare). Interventional procedures were differentiated according to the region of fistula and the type of procedure. RESULTS In total, 264 neurointerventional procedures of 131 patients with dAVF (94 cranial, 37 spinal) were executed between 02/2010 and 12/2020. The following DRLs, AD, and mean values could be determined: for cranial dAVF (I) DRL 507.33 Gy cm2, AD 369.79 Gy cm2, mean 396.51 Gy cm2; (II) DRL 256.65 Gy cm2, AD 214.19 Gy cm2, mean 211.80 Gy cm2; for spinal dAVF (I) DRL 482.72 Gy cm2, AD 275.98 Gy cm2, mean 347.12 Gy cm2; (II) DRL 396.39 Gy cm2, AD 210.57 Gy cm2, mean 299.55 Gy cm2. Dose levels of EVT were significantly higher compared to diagnostic angiographies (p < 0.001). No statistical difference in dose levels regarding the localization of dAVF was found. CONCLUSION Our results could be used for establishing DRLs in the EVT of cranial and spinal dAVF. Because radiation exposure to comparably complex interventions such as AVM embolization is similar, it may be useful to determine general DRLs for both entities together.
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Affiliation(s)
- Marcel Opitz
- Institute of Diagnostic and Interventional Radiology and Neuroradiology, Faculty of Medicine University Hospital Essen, University Hospital Essen, Hufelandstrasse 55, 45147, Essen, Germany.
| | - Sebastian Zensen
- Institute of Diagnostic and Interventional Radiology and Neuroradiology, Faculty of Medicine University Hospital Essen, University Hospital Essen, Hufelandstrasse 55, 45147, Essen, Germany
| | - Denise Bos
- Institute of Diagnostic and Interventional Radiology and Neuroradiology, Faculty of Medicine University Hospital Essen, University Hospital Essen, Hufelandstrasse 55, 45147, Essen, Germany
| | - Yan Li
- Institute of Diagnostic and Interventional Radiology and Neuroradiology, Faculty of Medicine University Hospital Essen, University Hospital Essen, Hufelandstrasse 55, 45147, Essen, Germany
| | - Hanna Styczen
- Institute of Diagnostic and Interventional Radiology and Neuroradiology, Faculty of Medicine University Hospital Essen, University Hospital Essen, Hufelandstrasse 55, 45147, Essen, Germany
| | - Axel Wetter
- Institute of Diagnostic and Interventional Radiology and Neuroradiology, Faculty of Medicine University Hospital Essen, University Hospital Essen, Hufelandstrasse 55, 45147, Essen, Germany
- Department of Diagnostic and Interventional Radiology, Neuroradiology, Asklepios Klinikum Harburg, Hamburg, Germany
| | - Nika Guberina
- Department of Radiotion Therapy, University Hospital Essen, West German Cancer Center, Essen, Germany
| | - Ramazan Jabbarli
- Department of Neurosurgery, University Hospital Essen, Essen, Germany
| | - Ulrich Sure
- Department of Neurosurgery, University Hospital Essen, Essen, Germany
| | - Michael Forsting
- Institute of Diagnostic and Interventional Radiology and Neuroradiology, Faculty of Medicine University Hospital Essen, University Hospital Essen, Hufelandstrasse 55, 45147, Essen, Germany
| | - Isabel Wanke
- Institute of Diagnostic and Interventional Radiology and Neuroradiology, Faculty of Medicine University Hospital Essen, University Hospital Essen, Hufelandstrasse 55, 45147, Essen, Germany
- Department of Neuroradiology, Clinic Hirslanden, Zurich, Switzerland
| | - Cornelius Deuschl
- Institute of Diagnostic and Interventional Radiology and Neuroradiology, Faculty of Medicine University Hospital Essen, University Hospital Essen, Hufelandstrasse 55, 45147, Essen, Germany
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Ozpeynirci Y, Trumm CG, Stahl R, Liebig T, Forbrig R. Radiation Dose and Fluoroscopy Time of Endovascular Coil Embolization in Patients with Carotid Cavernous Fistulas. Diagnostics (Basel) 2022; 12:diagnostics12020531. [PMID: 35204620 PMCID: PMC8871160 DOI: 10.3390/diagnostics12020531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 02/17/2022] [Accepted: 02/17/2022] [Indexed: 11/16/2022] Open
Abstract
Carotid cavernous fistulas (CCFs) are abnormal connections between the cavernous sinus and the internal and/or external carotid artery. Endovascular therapy is the gold standard treatment. In the current retrospective single-center study we report detailed dosimetrics of all patients with CCFs treated by endovascular coil embolization between January 2012 and August 2021. Procedural and dosimetric data were compared between direct and indirect fistulas according to Barrow et al., and different DSA protocol groups. The local diagnostic reference level (DRL) was defined as the 3rd quartile of the dose distribution. In total, thirty patients met the study criteria. The local DRL was 376.2 Gy cm2. The procedural dose area product (DAP) (p = 0.03) and the number of implanted coils (p = 0.02) were significantly lower in direct fistulas. The median values for fluoroscopy time (FT) (p = 0.08) and number of DSA acquisitions (p = 0.84) were not significantly different between groups. There was a significantly positive correlation between DAP and FT (p = 0.003). The application of a dedicated low-dose protocol yielded a 32.6% DAP reduction. In conclusion, this study provides novel DRLs for endovascular CCF treatment using detachable coils. The data presented in this work might be used to establish new specific DRLs.
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Ozpeynirci Y, Trumm C, Stahl R, Fischer D, Liebig T, Forbrig R. Radiation Dose and Fluoroscopy Time of Diagnostic Angiography in Patients with Spinal Dural Arteriovenous Fistula. Clin Neuroradiol 2022; 32:791-797. [PMID: 34994809 PMCID: PMC9424156 DOI: 10.1007/s00062-021-01130-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 12/09/2021] [Indexed: 11/03/2022]
Abstract
PURPOSE Spinal dural arteriovenous fistulas (SDAVFs) represent the most common indication for a spinal angiography. The diagnostic reference level (DRL) for this specific endovascular procedure is still to be determined. This single-center study provides detailed dosimetrics of diagnostic spinal angiography performed in patients with SDAVFs. METHODS Retrospective analysis of all diagnostic spinal angiographies between December 2011 and January 2021. Only patients with an SDAVF who had baseline magnetic resonance angiography (MRA), diagnostic digital subtraction angiography (DSA), treatment and follow-up at this institution were included. Dose area product (DAP, Gy cm2) and fluoroscopy time were compared between preoperative and postoperative angiographies, according to SDAVF locations (common versus uncommon), MRA results at baseline (positive versus negative) and DSA protocols (low-dose, mixed-dose, normal-dose). The 75th percentile of the DAP distribution was used to define the local DRL. RESULTS A total of 62 spinal angiographies were performed in 25 patients with SDAVF. Preoperative angiographies (30/62, 48%) yielded a significantly higher DAP and longer fluoroscopy time when compared to postoperative angiographies (32/62, 53%) (p < 0.01). The local DRL was 329.41 Gy cm2 for a nonspecific (n = 62), 395.59 Gy cm2 for a preoperative and 138.6 Gy cm2 for a postoperative spinal angiography. Preoperative angiography of uncommonly located SDAVFs yielded a significantly longer fluoroscopy time (p = 0.02). The MRA-based fistula detection had no significant impact on dosimetrics (p > 0.05). A low-dose protocol yielded a 61% reduction of DAP. CONCLUSION The results of the present study suggest novel DRLs for spinal angiography in patients with SDAVF. Dedicated low-dose protocols enable radiation dose optimization in these procedures.
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Affiliation(s)
- Yigit Ozpeynirci
- Klinikum Großhadern, Institut für Neuroradiologie, Ludwig Maximilians University, Marchioninistr. 15, 81377, Munich, Germany.
| | - Christoph Trumm
- Klinikum Großhadern, Institut für Neuroradiologie, Ludwig Maximilians University, Marchioninistr. 15, 81377, Munich, Germany
| | - Robert Stahl
- Klinikum Großhadern, Institut für Neuroradiologie, Ludwig Maximilians University, Marchioninistr. 15, 81377, Munich, Germany
| | - David Fischer
- Klinikum Großhadern, Institut für Neuroradiologie, Ludwig Maximilians University, Marchioninistr. 15, 81377, Munich, Germany
| | - Thomas Liebig
- Klinikum Großhadern, Institut für Neuroradiologie, Ludwig Maximilians University, Marchioninistr. 15, 81377, Munich, Germany
| | - Robert Forbrig
- Klinikum Großhadern, Institut für Neuroradiologie, Ludwig Maximilians University, Marchioninistr. 15, 81377, Munich, Germany
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Opitz M, Alatzides G, Zensen S, Bos D, Wetter A, Guberina N, Darkwah Oppong M, Wrede KH, Hagenacker T, Li Y, Wanke I, Forsting M, Deuschl C. Radiation Exposure During Diagnostic and Therapeutic Angiography of Carotid-cavernous Fistula : A Retrospective Single Center Observational Study. Clin Neuroradiol 2021; 32:117-122. [PMID: 34932132 PMCID: PMC8894175 DOI: 10.1007/s00062-021-01126-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Accepted: 11/17/2021] [Indexed: 11/28/2022]
Abstract
Purpose The aim of this study was to determine local diagnostic reference levels (DRLs) during endovascular diagnostics and therapy of carotid-cavernous fistulas (CCF). Methods In a retrospective study design, DRLs, achievable dose (AD) and mean values were assessed for all patients with CCF undergoing diagnostic angiography (I) or embolization (II). All procedures were performed with the flat-panel angiography system Allura Xper (Philips Healthcare). Interventional procedures were differentiated according to the type of CCF and the type of procedure. Results In total, 86 neurointerventional procedures of 48 patients with CCF were executed between February 2010 and July 2021. The following DRLs, AD and mean values could be determined: (I) DRL 215 Gy ∙ cm2, AD 169 Gy ∙ cm2, mean 165 Gy ∙ cm2; (II) DRL 350 Gy ∙ cm2, AD 226 Gy ∙ cm2, mean 266 Gy ∙ cm2. Dose levels of embolization were significantly higher compared to diagnostic angiography (p < 0.001). No significant dose difference was observed with respect to the type of fistula or the embolization method. Conclusion This article reports on diagnostic and therapeutic DRLs in the management of CCF that could serve as a benchmark for the national radiation protection authorities. Differentiation by fistula type or embolization method does not seem to be useful.
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Affiliation(s)
- Marcel Opitz
- Institute of Diagnostic and Interventional Radiology and Neuroradiology, Faculty of Medicine, University Hospital Essen, Hufelandstraße 55, 45147, Essen, Germany.
| | - Georgios Alatzides
- Institute of Diagnostic and Interventional Radiology and Neuroradiology, Faculty of Medicine, University Hospital Essen, Hufelandstraße 55, 45147, Essen, Germany
| | - Sebastian Zensen
- Institute of Diagnostic and Interventional Radiology and Neuroradiology, Faculty of Medicine, University Hospital Essen, Hufelandstraße 55, 45147, Essen, Germany
| | - Denise Bos
- Institute of Diagnostic and Interventional Radiology and Neuroradiology, Faculty of Medicine, University Hospital Essen, Hufelandstraße 55, 45147, Essen, Germany
| | - Axel Wetter
- Institute of Diagnostic and Interventional Radiology and Neuroradiology, Faculty of Medicine, University Hospital Essen, Hufelandstraße 55, 45147, Essen, Germany.,Department of Diagnostic and Interventional Radiology, Neuroradiology, Asklepios Klinikum Harburg, Hamburg, Germany
| | - Nika Guberina
- Department of Radiation Therapy, University Hospital Essen, West German Cancer Center, Essen, Germany
| | - Marvin Darkwah Oppong
- Department of Neurosurgery and Spine Surgery, University Hospital Essen, Essen, Germany
| | - Karsten H Wrede
- Department of Neurosurgery and Spine Surgery, University Hospital Essen, Essen, Germany
| | - Tim Hagenacker
- Department of Neurology and Center for Translational Neuro- and Behavioral Science (C-TNBS), University Hospital Essen, Essen, Germany
| | - Yan Li
- Institute of Diagnostic and Interventional Radiology and Neuroradiology, Faculty of Medicine, University Hospital Essen, Hufelandstraße 55, 45147, Essen, Germany
| | - Isabel Wanke
- Institute of Diagnostic and Interventional Radiology and Neuroradiology, Faculty of Medicine, University Hospital Essen, Hufelandstraße 55, 45147, Essen, Germany.,Department of Neuroradiology, Clinic Hirslanden, Zurich, Switzerland
| | - Michael Forsting
- Institute of Diagnostic and Interventional Radiology and Neuroradiology, Faculty of Medicine, University Hospital Essen, Hufelandstraße 55, 45147, Essen, Germany
| | - Cornelius Deuschl
- Institute of Diagnostic and Interventional Radiology and Neuroradiology, Faculty of Medicine, University Hospital Essen, Hufelandstraße 55, 45147, Essen, Germany
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Ihn YK, Kim BS, Jeong HW, Suh SH, Won YD, Lee YJ, Kim DJ, Jeon P, Ryu CW, Suh SI, Choi DS, Choi SS, Kim SH, Byun JS, Rho J, Song Y, Jeong WS, Hong N, Baik SH, Park JJ, Lim SM, Kim JJ, Yoon W. Monitoring Radiation Doses during Diagnostic and Therapeutic Neurointerventional Procedures: Multicenter Study for Establishment of Reference Levels. Neurointervention 2021; 16:240-251. [PMID: 34695909 PMCID: PMC8561028 DOI: 10.5469/neuroint.2021.00437] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 10/18/2021] [Indexed: 12/26/2022] Open
Abstract
PURPOSE To assess patient radiation doses during diagnostic and therapeutic neurointerventional procedures from multiple centers and propose dose reference level (RL). MATERIALS AND METHODS Consecutive neurointerventional procedures, performed in 22 hospitals from December 2020 to June 2021, were retrospectively studied. We collected data from a sample of 429 diagnostic and 731 therapeutic procedures. Parameters including dose-area product (DAP), cumulative air kerma (CAK), fluoroscopic time (FT), and total number of image frames (NI) were obtained. RL were calculated as the 3rd quartiles of the distribution. RESULTS Analysis of 1160 procedures from 22 hospitals confirmed the large variability in patient dose for similar procedures. RLs in terms of DAP, CAK, FT, and NI were 101.6 Gy·cm2, 711.3 mGy, 13.3 minutes, and 637 frames for cerebral angiography, 199.9 Gy·cm2, 3,458.7 mGy, 57.3 minutes, and 1,000 frames for aneurysm coiling, 225.1 Gy·cm2, 1,590 mGy, 44.7 minutes, and 800 frames for stroke thrombolysis, 412.3 Gy·cm2, 4,447.8 mGy, 99.3 minutes, and 1,621.3 frames for arteriovenous malformation (AVM) embolization, respectively. For all procedures, the results were comparable to most of those already published. Statistical analysis showed male and presence of procedural complications were significant factors in aneurysmal coiling. Male, number of passages, and procedural combined technique were significant factors in stroke thrombolysis. In AVM embolization, a significantly higher radiation dose was found in the definitive endovascular cure group. CONCLUSION Various RLs introduced in this study promote the optimization of patient doses in diagnostic and therapeutic interventional neuroradiology procedures. Proposed 3rd quartile DAP (Gy·cm2) values were 101.6 for diagnostic cerebral angiography, 199.9 for aneurysm coiling, 225.1 for stroke thrombolysis, and 412.3 for AVM embolization. Continual evolution of practices and technologies requires regular updates of RLs.
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Affiliation(s)
- Yon-Kwon Ihn
- Department of Radiology, St. Vincent's Hospital, The Catholic University of Korea, Suwon, Korea
| | - Bum-Soo Kim
- Department of Radiology, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - Hae Woong Jeong
- Department of Radiology, Busan Paik Hospital, Inje University, Busan, Korea
| | - Sang Hyun Suh
- Department of Radiology, Gangnam Severance Hospital, Yonsei University, Seoul, Korea
| | - Yoo Dong Won
- Department of Radiology, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Uijeongbu, Korea
| | - Young-Jun Lee
- Department of Radiology, Hanyang University College of Medicine, Seoul, Korea
| | - Dong Joon Kim
- Department of Radiology, Severance Hospital, Yonsei Unviersity College of Medicine, Seoul, Korea
| | - Pyong Jeon
- Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Chang-Woo Ryu
- Department of Radiology, Kyung Hee University Hospital at Gangdong, Seoul, Korea
| | - Sang-Il Suh
- Department of Radiology, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea
| | - Dae Seob Choi
- Department of Radiology, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Korea
| | - See Sung Choi
- Department of Radiology, Wonkwang University Hospital, Iksan, Korea
| | - Sang Heum Kim
- Department of Radiology, CHA Bundang Medical Center, CHA University, Seongnam, Korea
| | - Jun Soo Byun
- Department of Radiology, Chung-Ang University Hospital, Seoul, Korea
| | - Jieun Rho
- Department of Radiology, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Yunsun Song
- Department of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Woo Sang Jeong
- Department of Radiology, Ajou University Medical Center, Ajou University School of Medicine, Suwon, Korea
| | - Noah Hong
- Department of Neurosurgery, Seoul National University Hospital, Seoul, Korea
| | - Sung Hyun Baik
- Department of Radiology, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Jeong Jin Park
- Department of Neurology, Konkuk University Medical Center, Seoul, Korea
| | - Soo Mee Lim
- Department of Radiology, Ewha Womans University Seoul Hospital, Seoul, Korea
| | - Jung-Jae Kim
- Department of Neurosurgery, Ewha Womans University Seoul Hospital, Seoul, Korea
| | - Woong Yoon
- Department of Radiology, Chonnam National University Hospital, Gwangju, Korea
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Forbrig R, Stahl R, Geyer LL, Ozpeynirci Y, Liebig T, Trumm CG. Radiation Dose and Fluoroscopy Time of Endovascular Treatment in Patients with Intracranial Lateral Dural Arteriovenous Fistulae. Clin Neuroradiol 2020; 31:1149-1157. [PMID: 33313974 PMCID: PMC8648699 DOI: 10.1007/s00062-020-00982-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 11/20/2020] [Indexed: 12/18/2022]
Abstract
Purpose Intracranial lateral dural arteriovenous fistula (LDAVF) represents a specific subtype of cerebrovascular fistulae, harboring a potentially life-threatening risk of brain hemorrhage. Fluoroscopically guided endovascular embolization is the therapeutic gold standard. We provide detailed dosimetry data to suggest novel diagnostic reference levels (DRL). Methods Retrospective single-center study of LDAVFs treated between January 2014 and December 2019. Regarding dosimetry, the dose area product (DAP) and fluoroscopy time were analyzed for the following variables: Cognard scale grade, endovascular technique, angiographic outcome, and digital subtraction angiography (DSA) protocol. Results A total of 70 patients (19 female, median age 65 years) were included. Total median values for DAP and fluoroscopy time were 325 Gy cm2 (25%/75% percentile: 245/414 Gy cm2) and 110 min (68/142min), respectively. Neither median DAP nor fluoroscopy time were significantly different when comparing low-grade with high-grade LDAVF (Cognard I + IIa versus IIb–V; p > 0.05, each). Transvenous coil embolization yielded the lowest dosimetry values, with significantly lower median values when compared to a combined transarterial/transvenous technique (DAP 290 Gy cm2 versus 388 Gy cm2, p = 0.031; fluoroscopy time 85 min versus 170 min, p = 0.016). A significant positive correlation was found between number of arterial feeders treated by liquid embolization and both DAP (rs = 0.367; p = 0.010) and fluoroscopy time (rs = 0.295; p = 0.040). Complete LDAVF occlusion was associated with transvenous coiling (p = 0.001). A low-dose DSA protocol yielded a 20% reduction of DAP (p = 0.021). Conclusion This LDAVF study suggests several local DRLs which varied substantially dependent on the endovascular technique and DSA protocol.
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Affiliation(s)
- Robert Forbrig
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistraße 15, 81377 Munich, Germany
| | - Robert Stahl
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistraße 15, 81377 Munich, Germany
| | - Lucas L. Geyer
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistraße 15, 81377 Munich, Germany
| | - Yigit Ozpeynirci
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistraße 15, 81377 Munich, Germany
| | - Thomas Liebig
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistraße 15, 81377 Munich, Germany
| | - Christoph G. Trumm
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistraße 15, 81377 Munich, Germany
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Investigating the parameters that affect the radiation exposure and establishing typical values based on procedure complexity for cerebral angiography and brain aneurysm embolization. Neuroradiology 2020; 63:787-794. [PMID: 33057746 DOI: 10.1007/s00234-020-02580-z] [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: 06/17/2020] [Accepted: 10/05/2020] [Indexed: 10/23/2022]
Abstract
PURPOSE The purpose of this study is to investigate the parameters that affect the radiation exposure and to establish typical values (TV) based on procedure complexity for cerebral angiography (CA) and brain aneurysm embolization (BAE). METHODS Clinical parameters and exposure data were retrospectively reviewed for 348 examinations performed between March 2016 and December 2019 at a single specialized neuroradiology center. TV were derived as the median value of the distribution of exposure parameters such as total air kerma area product (PKA,T), air kerma at the patient entrance reference point, fluoroscopy time, and number of frames. A statistical analysis was conducted to investigate the exposure variability with patient's gender, number of treated vessels during CA and patient gender, aneurysm location and dimension, and treatment strategies during BAE. RESULTS Patient gender was associated with a significant increase in the exposure level for both CA and BAE. For CA, TV were in term of PKA,T of 52 Gycm2 for male vs. 28 Gycm2 for female patients. For BAE, these were 113 Gycm2 for male vs. 75 Gycm2 for female patients. Exposure levels increased significantly with the number of treated vessels in CA. TV were 20 Gycm2 for one vessel vs. 77 Gycm2 for 5-6 vessels CA. For BAE, aneurysm location was also a key factor that affects the patient exposure. TV were 55 Gycm2 for aneurysms grouped in location 1 vs. 105 Gycm2 for those grouped in location 2. CONCLUSION Male gender, number of treated vessels, and aneurysm location are key parameters affecting patient exposure during CA and BAE procedures.
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Feasibility of low-dose digital subtraction angiography protocols for the endovascular treatment of intracranial dural arteriovenous fistulas. Neuroradiology 2020; 63:267-273. [PMID: 32857215 DOI: 10.1007/s00234-020-02537-2] [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: 06/21/2020] [Accepted: 08/20/2020] [Indexed: 10/23/2022]
Abstract
BACKGROUND Among neurointerventional procedures, the embolization of complex shunt lesions usually requires more radiation dose. We aimed to evaluate the procedural outcome and safety in using low-dose DSA protocols for intracranial dural arteriovenous fistula (AVF) embolization treatment. METHODS Between January 2014 and July 2018, 55 patients with dural AVFs who underwent endovascular treatment were included in the study. The low-dose group (n = 27) included from January 2016 used various low-dose DSA protocols made by modifying the thickness of the copper filter or the detector entrance dose. We compared radiation dose metrics, such as air-kerma, kerma-air product (KAP), and fluoroscopy time, as well as clinical and imaging outcomes with the conventional-dose group (n = 28) included before January 2016. RESULTS The total KAP was 40.1% lower in the low-dose group (87.9 vs. 146.7 Gy cm2, p = 0.002). The average number of DSA runs (25.1 vs. 25.5, p = 0.86) and fluoroscopy times (77.4 vs. 69.7 min, p = 0.48) were similar between the groups. An immediate favorable occlusion rate (total or near total occlusion) was achieved in 41 (74.5%) patients. Ten patients (18.2%) underwent additional procedures due to residual (n = 6) and/or recurrent (n = 5) lesions. At a median of 10 months follow-up, 45 patients (86.5%) had achieved favorable occlusion. Treatment outcomes showed no significant between-group differences. There was one case (1.8%) of procedure-related complications in the low-dose group. All but one patient showed favorable clinical outcomes (modified Rankin score ≤ 2). CONCLUSION The low-dose protocols were feasible by showing significant radiation dose reduction and acceptable procedural outcome.
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Weyland CS, Neuberger U, Seker F, Nagel S, Arthur Ringleb P, Möhlenbruch MA, Bendszus M, Pfaff JA. Effect of treatment technique on radiation exposure in mechanical thrombectomy for acute ischaemic stroke: A matched-pair analysis. Neuroradiol J 2020; 33:286-291. [PMID: 32419602 DOI: 10.1177/1971400920925433] [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] [Indexed: 01/13/2023] Open
Abstract
OBJECTIVE This study aimed to compare radiation exposure (RE) in patients receiving mechanical thrombectomy (MT) for large-vessel occlusions in the anterior circulation using direct thrombo-aspiration (DT) versus stent-retriever thrombectomy under continuous distal aspiration (STA). METHODS This was a retrospective single-centre analysis of an Institutional Review Board-approved stroke database of a comprehensive stroke centre focusing on RE per dose area product, procedure time (PT) and fluoroscopy time (FT) in patients receiving MT. Patients who received MT with DT were matched with patients treated using STA according to occlusion location, mode of anaesthesia, manoeuvre count and sex. RESULTS Apart from patient age (DT: M = 74 years (standard deviation (SD)=13 years); STA: M = 79 years (SD = 11 years); p = 0.023), there was no difference in baseline patient characteristics (n = 68 per group). PT (DT: median = 26 minutes (interquartile range (IQR) = 21-38 minutes); STA: median = 49 minutes (IQR 37-77 minutes); p < 0.0001) and FT (DT: median = 12 minutes (IQR 7-18 minutes); STA: median = 26 minutes (IQR 14-43 minutes); p < 0.0001) were shorter in patients who received MT using DT. RE (DT: median = 62.6 Gy·cm2 (IQR 41.7-89.4 Gy·cm2); STA: median = 89.8 Gy·cm2 (IQR 53.7-131.7 Gy·cm2); p = 0.034) was significantly lower in patients who received MT using DT. This represents a relative increase of RE, FT and PT by 43.6%, 116.6% and 88.5%, respectively, in patients who received MT using STA. CONCLUSION MT using DT is associated with shorter FT and PT and lower RE compared to matched patients treated with STA.
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Affiliation(s)
| | - Ulf Neuberger
- Department of Neuroradiology, Heidelberg University Hospital, Germany
| | - Fatih Seker
- Department of Neuroradiology, Heidelberg University Hospital, Germany
| | - Simon Nagel
- Department of Neurology, Heidelberg University Hospital, Germany
| | | | | | - Martin Bendszus
- Department of Neuroradiology, Heidelberg University Hospital, Germany
| | - Johannes Ar Pfaff
- Department of Neuroradiology, Heidelberg University Hospital, Germany
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Miller DL. Review of air kerma‐area product, effective dose and dose conversion coefficients for non‐cardiac interventional fluoroscopy procedures. Med Phys 2020; 47:975-982. [DOI: 10.1002/mp.13990] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 12/09/2019] [Accepted: 12/17/2019] [Indexed: 11/08/2022] Open
Affiliation(s)
- Donald L. Miller
- Center for Devices and Radiological Health U.S. Food and Drug Administration Silver Spring MD 20993USA
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13
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Farah J, Rouchaud A, Henry T, Regen C, Mihalea C, Moret J, Spelle L. Dose reference levels and clinical determinants in stroke neuroradiology interventions. Eur Radiol 2018; 29:645-653. [DOI: 10.1007/s00330-018-5593-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 05/22/2018] [Accepted: 06/05/2018] [Indexed: 12/17/2022]
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Patient dose in interventional radiology: a multicentre study of the most frequent procedures in France. Eur Radiol 2017; 27:4281-4290. [DOI: 10.1007/s00330-017-4780-5] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 02/13/2017] [Accepted: 02/16/2017] [Indexed: 10/20/2022]
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van der Marel K, Vedantham S, van der Bom IMJ, Howk M, Narain T, Ty K, Karellas A, Gounis MJ, Puri AS, Wakhloo AK. Reduced Patient Radiation Exposure during Neurodiagnostic and Interventional X-Ray Angiography with a New Imaging Platform. AJNR Am J Neuroradiol 2017; 38:442-449. [PMID: 28104643 DOI: 10.3174/ajnr.a5049] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Accepted: 10/11/2016] [Indexed: 01/03/2023]
Abstract
BACKGROUND AND PURPOSE Advancements in medical device and imaging technology as well as accruing clinical evidence have accelerated the growth of the endovascular treatment of cerebrovascular diseases. However, the augmented role of these procedures raises concerns about the radiation dose to patients and operators. We evaluated patient doses from an x-ray imaging platform with radiation dose-reduction technology, which combined image noise reduction, motion correction, and contrast-dependent temporal averaging with optimized x-ray exposure settings. MATERIALS AND METHODS In this single-center, retrospective study, cumulative dose-area product inclusive of fluoroscopy, angiography, and 3D acquisitions for all neurovascular procedures performed during a 2-year period on the dose-reduction platform were compared with a reference platform. Key study features were the following: The neurointerventional radiologist could select the targeted dose reduction for each patient with the dose-reduction platform, and the statistical analyses included patient characteristics and the neurointerventional radiologist as covariates. The analyzed outcome measures were cumulative dose (kerma)-area product, fluoroscopy duration, and administered contrast volume. RESULTS A total of 1238 neurointerventional cases were included, of which 914 and 324 were performed on the reference and dose-reduction platforms, respectively. Over all diagnostic and neurointerventional procedures, the cumulative dose-area product was significantly reduced by 53.2% (mean reduction, 160.3 Gy × cm2; P < .0001), fluoroscopy duration was marginally significantly increased (mean increase, 5.2 minutes; P = .0491), and contrast volume was nonsignificantly increased (mean increase, 15.3 mL; P = .1616) with the dose-reduction platform. CONCLUSIONS A significant reduction in patient radiation dose is achievable during neurovascular procedures by using dose-reduction technology with a minimal impact on workflow.
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Affiliation(s)
- K van der Marel
- From the Department of Radiology (K.v.d.M., S.V., M.H., T.N., K.T., A.K., M.J.G., A.S.P., A.K.W.), New England Center for Stroke Research, University of Massachusetts Medical School, Worcester, Massachusetts
| | - S Vedantham
- From the Department of Radiology (K.v.d.M., S.V., M.H., T.N., K.T., A.K., M.J.G., A.S.P., A.K.W.), New England Center for Stroke Research, University of Massachusetts Medical School, Worcester, Massachusetts
| | | | - M Howk
- From the Department of Radiology (K.v.d.M., S.V., M.H., T.N., K.T., A.K., M.J.G., A.S.P., A.K.W.), New England Center for Stroke Research, University of Massachusetts Medical School, Worcester, Massachusetts
| | - T Narain
- From the Department of Radiology (K.v.d.M., S.V., M.H., T.N., K.T., A.K., M.J.G., A.S.P., A.K.W.), New England Center for Stroke Research, University of Massachusetts Medical School, Worcester, Massachusetts
| | - K Ty
- From the Department of Radiology (K.v.d.M., S.V., M.H., T.N., K.T., A.K., M.J.G., A.S.P., A.K.W.), New England Center for Stroke Research, University of Massachusetts Medical School, Worcester, Massachusetts
| | - A Karellas
- From the Department of Radiology (K.v.d.M., S.V., M.H., T.N., K.T., A.K., M.J.G., A.S.P., A.K.W.), New England Center for Stroke Research, University of Massachusetts Medical School, Worcester, Massachusetts
| | - M J Gounis
- From the Department of Radiology (K.v.d.M., S.V., M.H., T.N., K.T., A.K., M.J.G., A.S.P., A.K.W.), New England Center for Stroke Research, University of Massachusetts Medical School, Worcester, Massachusetts
| | - A S Puri
- From the Department of Radiology (K.v.d.M., S.V., M.H., T.N., K.T., A.K., M.J.G., A.S.P., A.K.W.), New England Center for Stroke Research, University of Massachusetts Medical School, Worcester, Massachusetts
| | - A K Wakhloo
- From the Department of Radiology (K.v.d.M., S.V., M.H., T.N., K.T., A.K., M.J.G., A.S.P., A.K.W.), New England Center for Stroke Research, University of Massachusetts Medical School, Worcester, Massachusetts
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Hassan AE, Amelot S. Radiation Exposure during Neurointerventional Procedures in Modern Biplane Angiographic Systems: A Single-Site Experience. INTERVENTIONAL NEUROLOGY 2017; 6:105-116. [PMID: 29118787 DOI: 10.1159/000456622] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Background and Purpose Per the ALARA principle, reducing the dose delivered to both patients and staff must be a priority for endovascular therapists, who should monitor their own practice. We evaluated patient exposure to radiation during common neurointerventions performed with a recent flat-panel detector angiographic system and compared our results with those of recently published studies. Methods All consecutive patients who underwent a diagnostic cerebral angiography or intervention on 2 modern flat-panel detector angiographic biplane systems (Innova IGS 630, GE Healthcare, Chalfont St Giles, UK) from February to November 2015 were retrospectively analyzed. Dose-area product (DAP), cumulative air kerma (CAK) per plane, fluoroscopy time (FT), and total number of digital subtraction angiography (DSA) frames were collected, reported as median (interquartile range), and compared with the previously published literature. Results A total of 755 consecutive cases were assessed in our institution during the study period, including 398 diagnostic cerebral angiographies and 357 interventions. The DAP (Gy × cm2), fontal and lateral CAK (Gy), FT (min), and total number of DSA frames were as follows: 43 (33-60), 0.26 (0.19-0.33), 0.09 (0.07-0.13), 5.6 (4.2-7.5), and 245 (193-314) for diagnostic cerebral angiographies, and 66 (41-110), 0.46 (0.25-0.80), 0.18 (0.10-0.30), 18.3 (9.1-30.2), and 281 (184-427) for interventions. Conclusion Our diagnostic cerebral angiography group had a lower median and was in the 75th percentile of DAP and FT when compared with the published literature. For interventions, both DAP and number of DSA frames were significantly lower than the values reported in the literature, despite a higher FT. Subgroup analysis by procedure type also revealed a lower or comparable DAP.
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Decreased patient exposure to ionizing radiation during interventional rheumatology procedures after optimization of protection. Joint Bone Spine 2016; 84:335-339. [PMID: 27825575 DOI: 10.1016/j.jbspin.2016.09.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/18/2016] [Indexed: 11/22/2022]
Abstract
OBJECTIVES To decrease radiation exposure of patients undergoing interventional rheumatology procedures, without adversely affecting quality of care. METHODS The radiation dose received, assessed by the dose-area product (DAP), was measured during 283 intraarticular injections performed under fluoroscopic guidance between May and July 2013. Then, three steps were taken to decrease patients' radiation exposure: a copper filter was added, the anti-scatter grid was removed, and exposure cell sensitivity was set at the highest value. DAP was measured during 158 intraarticular injections performed in 2014 with these measures in place. RESULTS Mean DAP before optimization was 175μGray·m2 during facet joint injections (n=4) and 43μGray·m2 during hip injections but was less than 20μGray·m2 for injections into the shoulders (15.7μGray·m2), ankles (7.7μGray·m2), wrists (3.7μGray·m2), and fingers (3.3μGray·m2). After optimization, DAP decreased markedly for all injection sites, by 52% (shoulders) to 87% (facet joints, 22.7μGray·m2). Decreases occurred at all three steps of the procedure, i.e., patient installation, injection, and last image hold. Exposure during facet joint injections varied from 84 (54.5-108.5) μGray·m2 when body mass index (BMI) was <25kg/m2 to 228.9 (161.3-340.4)μGray·m2 when BMI was>30kg/m2. CONCLUSION Simple technical changes translate into large decreases in patient radiation exposure during fluoroscopically-guided injections, particularly at the facet joints and in obese patients.
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Sanchez RM, Vano E, Fernández JM, Moreu M, Lopez-Ibor L. Brain radiation doses to patients in an interventional neuroradiology laboratory. AJNR Am J Neuroradiol 2014; 35:1276-80. [PMID: 24627454 DOI: 10.3174/ajnr.a3884] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE In 2011, the International Commission on Radiologic Protection established an absorbed-dose threshold to the brain of 0.5 Gy as likely to produce cerebrovascular disease. In this paper, the authors investigated the brain doses delivered to patients during clinical neuroradiology procedures in a university hospital. MATERIALS AND METHODS The radiation dose delivered to the brain was investigated in 99 diagnostic and therapeutic interventional neuroradiology procedures. Brain doses were calculated in a mathematic model of an adult standard anthropomorphic phantom by using the technical and radiation dose data of an x-ray biplane system submitted to regular quality controls and calibration programs. RESULTS For cerebral embolizations, brain doses resulted in a maximum value of 1.7 Gy, with an average value of 500 mGy. Median and third quartile resulted in 400 and 856 mGy, respectively. For cerebral angiography, the average dose in the brain was 100 mGy. CONCLUSIONS This work supports the International Commission on Radiologic Protection recommendation on enhancing optimization when doses to the brain could be higher than 0.5 Gy. Radiation doses should be recorded for all patients and kept as low as reasonably achievable. For pediatric patients and young adults, an individual evaluation of brain doses could be appropriate.
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Affiliation(s)
- R M Sanchez
- From the Medical Physics Service (R.M.S., E.V., J.M.F.)Radiology Department (R.M.S., E.V., J.M.F.), Universidad Complutense de Madrid, Medicine Faculty, Madrid, Spain.
| | - E Vano
- From the Medical Physics Service (R.M.S., E.V., J.M.F.)Radiology Department (R.M.S., E.V., J.M.F.), Universidad Complutense de Madrid, Medicine Faculty, Madrid, Spain
| | - J M Fernández
- From the Medical Physics Service (R.M.S., E.V., J.M.F.)Radiology Department (R.M.S., E.V., J.M.F.), Universidad Complutense de Madrid, Medicine Faculty, Madrid, Spain
| | - M Moreu
- Interventional Neuroradiology Department (M.M., L.L.-I.). Instituto de Investigación Sanitaria del Hospital Clínico San Carlos, Madrid, Spain
| | - L Lopez-Ibor
- Interventional Neuroradiology Department (M.M., L.L.-I.). Instituto de Investigación Sanitaria del Hospital Clínico San Carlos, Madrid, Spain
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Lesage FX. Rédaction d’un article scientifique. ARCH MAL PROF ENVIRO 2013. [DOI: 10.1016/j.admp.2013.09.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Roch P, Aubert B. French diagnostic reference levels in diagnostic radiology, computed tomography and nuclear medicine: 2004-2008 review. RADIATION PROTECTION DOSIMETRY 2013; 154:52-75. [PMID: 22956562 DOI: 10.1093/rpd/ncs152] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
After 5 y of collecting data on diagnostic reference levels (DRLs), the Nuclear Safety and Radiation Protection French Institute (IRSN) presents the analyses of this data. The analyses of the collected data for radiology, computed tomography (CT) and nuclear medicine allow IRSN to estimate the level of regulatory application by health professionals and the representativeness of current DRL in terms of relevant examinations, dosimetric quantities, numerical values and patient morphologies. Since 2004, the involvement of professionals has highly increased, especially in nuclear medicine, followed by CT and then by radiology. Analyses show some discordance between regulatory examinations and clinical practice. Some of the dosimetric quantities used for the DRL setting are insufficient or not relevant enough, and some numerical values should also be reviewed. On the basis of these findings, IRSN formulates recommendations to update regulatory DRL with current and relevant examination lists, dosimetric quantities and numerical values.
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Affiliation(s)
- P Roch
- PRP-HOM/SER/UEM, Institut de Radioprotection et de Sureté Nucléaire, BP 17, 92262 Fontenay-aux-Roses, France.
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