Abstract
Purpose
Calcification of the brain supplying arteries has been linked to an increased risk for cerebrovascular disease. The purpose of this study was to test the potential of susceptibility weighted MR imaging (SWMR) for the detection of vertebral artery calcifications, based on CT as a reference standard.
Methods
Four hundred seventy-four patients, who had received head CT and 1.5 T MR scans with SWMR, including the distal vertebral artery, between January 2014 and December 2016, were retrospectively evaluated and 389 patients were included. Sensitivity and specificity for the detection of focal calcifications and intra- and interobserver agreement were calculated for SWMR and standard MRI, using CT as a standard of reference. The diameter of vertebral artery calcifications was used to assess correlations between imaging modalities. Furthermore, the degree of vessel stenosis was determined in 30 patients, who had received an additional angiography.
Results
On CT scans, 40 patients showed a total of 52 vertebral artery calcifications. While SWMR reached a sensitivity of 94% (95% CI 84–99%) and a specificity of 97% (95% CI 94–98%), standard MRI yielded a sensitivity of 33% (95% CI 20–46%), and a specificity of 93% (95% CI 90–96%). Linear regression analysis of size measurements confirmed a close correlation between SWMR and CT measurements (R 2 = 0.74, p < 0.001). Compared to standard MRI (ICC = 0.52; CI 0.45–0.59), SWMR showed a higher interobserver agreement for calcification measurements (ICC = 0.84; CI 0.81–0.87).
Conclusions
For detection of distal vertebral artery calcifications, SWMR demonstrates a performance comparable to CT and considerably higher than conventional MRI.
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Abbreviations
- SWMR:
-
Susceptibility weighted magnetic resonance
- CE:
-
Imaging contrast enhanced
- CTA:
-
Computed tomography angiography
- GRE:
-
Gradient echo
- MRA:
-
Magnetic resonance angiography
- NASCET:
-
North American Symptomatic Carotid Endarterectomy Trial
- TOF:
-
Time-of-flight
- QSM:
-
Quantitative susceptibility mapping
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LCA was supported by the Charité Junior Clinician Scientist program funded by the Charité – Universitaetsmedizin Berlin and the Berlin Institute of Health.
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MRM has received grants from the Deutsche Forschungsgesellschaft (DFG, 5943/31/41/91) and the GIF (German Israel Research Foundation). BH has received research grants for the Department of Radiology, Charité – Universitätsmedizin Berlin from the following companies: (1) Abbott, (2) Actelion Pharmaceuticals, (3) Bayer Schering Pharma, (4) Bayer Vital, (5) BRACCO Group, (6) Bristol-Myers Squibb, (7) Charite Research Organisation GmbH, (8) Deutsche Krebshilfe, (9) Dt. Stiftung für Herzforschung, (10) Essex Pharma, (11) EU Programmes, (12) Fibrex Medical Inc., (13) Focused Ultrasound Surgery Foundation, (14) Fraunhofer Gesellschaft, (15) Guerbet, (16) INC Research, (17) lnSightec Ud., (18) IPSEN Pharma, (19) Kendlel MorphoSys AG, (20) Lilly GmbH, (21) Lundbeck GmbH, (22) MeVis Medical Solutions AG, (23) Nexus Oncology, (24) Novartis, (25) Parexel Clinical Research Organization Service, (26) Perceptive, (27) Pfizer GmbH, (28) Philipps, (29) Sanofis-Aventis S.A, (30) Siemens, (31) Spectranetics GmbH, (32) Terumo Medical Corporation, (33) TNS Healthcare GMbH, (34) Toshiba, (35) UCB Pharma, (36) Wyeth Pharma, (37) Zukunftsfond Berlin (TSB), (38) Amgen, (39) AO Foundation, (40) BARD, (41) BBraun, (42) Boehring Ingelheimer, (43) Brainsgate, (44) PPD (Clinical Research Organization), (45) CELLACT Pharma, (46) Celgene, (47) CeloNova BioSciences, (48) Covance, (49) DC Deviees, Inc. USA, (50) Ganymed, (51) Gilead Sciences, (52) Glaxo Smith Kline, (53) ICON (Clinical Research Organization), (54) Jansen, (55) LUX Bioseienees, (56) MedPass, (57) Merek, (58) Mologen, (59) Nuvisan, (60) Pluristem, (61) Quintiles, (62) Roehe, (63) Sehumaeher GmbH (Sponsoring eines Workshops), (64) Seattle Geneties, (65) Symphogen, (66) TauRx Therapeuties Ud., (67) Accovion, (68) AIO: Arbeitsgemeinschaft Internistische Onkologie, (69) ASR Advanced sleep research, (70) Astellas, (71) Theradex, (72) Galena Biopharma, (73) Chiltern, (74) PRAint, (75) lnspiremd, (76) Medronic, (77) Respicardia, (78) Silena Therapeutics, (79) Spectrum Pharmaceuticals and (80) St. Jude. The funding had no role in study design, data collection or analysis.
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All procedures performed in the studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. For this type of study formal consent is not required.
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Adams, L.C., Böker, S.M., Bender, Y.Y. et al. Detection of vessel wall calcifications in vertebral arteries using susceptibility weighted imaging. Neuroradiology 59, 861–872 (2017). https://doi.org/10.1007/s00234-017-1878-z
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DOI: https://doi.org/10.1007/s00234-017-1878-z