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Research ArticleInterventional

Efficacy of Skull Plain Films in Follow-up Evaluation of Cerebral Aneurysms Treated with Detachable Coils: Quantitative Assessment of Coil Mass

S.J. Ahn, B.M. Kim, W.S. Jung and S.H. Suh
American Journal of Neuroradiology February 2015, 36 (2) 337-341; DOI: https://doi.org/10.3174/ajnr.A4121
S.J. Ahn
aFrom the Department of Radiology (S.J.A., W.S.J., S.H.S.), Gangnam Severance Hospital
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B.M. Kim
bDepartment of Radiology (B.M.K.)
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W.S. Jung
aFrom the Department of Radiology (S.J.A., W.S.J., S.H.S.), Gangnam Severance Hospital
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S.H. Suh
aFrom the Department of Radiology (S.J.A., W.S.J., S.H.S.), Gangnam Severance Hospital
cSeverance Institute of Vascular and Metabolic Research (S.H.S.), Yonsei University College of Medicine, Seoul, Korea.
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Abstract

BACKGROUND AND PURPOSE: Skull plain films of coiled aneurysms have been used in a limited role, including morphologic comparison of the coil mass. We aimed to evaluate the efficacy of skull plain films in patients treated with detachable coils by using quantitative assessment.

MATERIALS AND METHODS: In this retrospective study, 78 pairs of the initial and follow-up skull anteroposterior and lateral images were reviewed independently by 2 neuroradiologists. The largest diameter, the perpendicular diameter, and area of the coil mass were measured separately on plain film, and quantitative changes of parameters were compared between subgroups, which were determined by consensus, depending on the need for retreatment. Subgroup analysis was also performed according to aneurysm size, packing attenuation, and ruptured status.

RESULTS: On skull lateral images, mean quantitative changes of the largest diameter (0.53 ± 0.43 mm versus 1.17 ± 0.91 mm, P < .01), the perpendicular diameter (0.56 ± 0.48 mm versus 1.20 ± 1.05 mm, P < .01), and the area of the coil mass (5.21 ± 7.51 mm2 versus 10.55 ± 10.93 mm2, P < .02) differed significantly between subgroups. Receiver operating characteristic analysis showed quantitative change of the largest diameter (>1.1 mm; sensitivity, 50.0%; specificity, 90.3%), the perpendicular diameter (>.9 mm; sensitivity, 62.5%; specificity, 85.5%), and the area (>8.5 mm2; sensitivity, 50.0%; specificity, 83.9%) on skull lateral films to be indicative of aneurysm recurrence, and the diagnostic accuracy of these parameters increased significantly in the high-packing-attenuation group.

CONCLUSIONS: Quantitative measurement of the coil mass by using skull plain lateral images has the potential to predict aneurysm recurrence in follow-up evaluations of intracranial aneurysms with coiling.

ABBREVIATIONS:

AAP
area on the anteroposterior view
ALat
area on the lateral view
AP
anteroposterior
LAP
largest diameter of coil mass on the anteroposterior view
LLat
largest diameter on the lateral view
PAP
diameter perpendicular to the LAP
PLat
diameter perpendicular to the LLat
  • © 2015 by American Journal of Neuroradiology
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American Journal of Neuroradiology: 36 (2)
American Journal of Neuroradiology
Vol. 36, Issue 2
1 Feb 2015
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Efficacy of Skull Plain Films in Follow-up Evaluation of Cerebral Aneurysms Treated with Detachable Coils: Quantitative Assessment of Coil Mass
S.J. Ahn, B.M. Kim, W.S. Jung, S.H. Suh
American Journal of Neuroradiology Feb 2015, 36 (2) 337-341; DOI: 10.3174/ajnr.A4121

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Efficacy of Skull Plain Films in Follow-up Evaluation of Cerebral Aneurysms Treated with Detachable Coils: Quantitative Assessment of Coil Mass
S.J. Ahn, B.M. Kim, W.S. Jung, S.H. Suh
American Journal of Neuroradiology Feb 2015, 36 (2) 337-341; DOI: 10.3174/ajnr.A4121
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