PT  - JOURNAL ARTICLE
AU  - Ahn, S.J.
AU  - Kim, B.M.
AU  - Jung, W.S.
AU  - Suh, S.H.
TI  - Efficacy of Skull Plain Films in Follow-up Evaluation of Cerebral Aneurysms Treated with Detachable Coils: Quantitative Assessment of Coil Mass
AID  - 10.3174/ajnr.A4121
DP  - 2015 Feb 01
TA  - American Journal of Neuroradiology
PG  - 337--341
VI  - 36
IP  - 2
4099  - http://www.ajnr.org/content/36/2/337.short
4100  - http://www.ajnr.org/content/36/2/337.full
SO  - Am. J. Neuroradiol.2015 Feb 01; 36
AB  - 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. AAParea on the anteroposterior viewALatarea on the lateral viewAPanteroposteriorLAPlargest diameter of coil mass on the anteroposterior viewLLatlargest diameter on the lateral viewPAPdiameter perpendicular to the LAPPLatdiameter perpendicular to the LLat