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Relationship between Two Types of Coil Packing Densities Relative to Aneurysm Size

 Keun Young Park  ;  Byung Moon Kim  ;  Eun Hyun Ihm  ;  Jang Hyun Baek  ;  Dong Joon Kim  ;  Dong Ik Kim  ;  Seung Kon Huh  ;  Jae Whan Lee 
 JOURNAL OF NEUROIMAGING, Vol.25(3) : 415-419, 2015 
Journal Title
Issue Date
Cerebral Angiography/methods* ; Embolization, Therapeutic/instrumentation ; Embolization, Therapeutic/methods* ; Humans ; Image Interpretation, Computer-Assisted/methods* ; Imaging, Three-Dimensional/methods* ; Intracranial Aneurysm/diagnostic imaging* ; Intracranial Aneurysm/therapy* ; Observer Variation ; Prognosis ; Reproducibility of Results ; Sensitivity and Specificity ; Treatment Outcome
Aneurysm ; coiling ; packing density
BACKGROUND AND PURPOSE: Coil packing density (PD) can be calculated via a formula (PDF ) or software (PDS ). Two types of PD can be different from each other for same aneurysm. This study aimed to evaluate the interobserver agreement and relationships between the 2 types of PD relative to aneurysm size. METHODS: Consecutive 420 saccular aneurysms were treated with coiling. PD (PDF , [coil volume]/[volume calculated by formula] and PDS, [coil volume]/[volume measured by software]) was calculated and prospectively recorded. Interobserver agreement was evaluated between PDF and PDS . Additionally, the relationships between PDF and PDS relative to aneurysm size were subsequently analyzed. RESULTS: Interobserver agreement for PDF and PDS was excellent (Intraclass correlation coefficient, PDF ; 0.967 and PDS ; 0.998). The ratio of PDF and PDS was greater for smaller aneurysms and converged toward 1.0 as the maximum dimension (DM ) of aneurysm increased. Compared with PDS , PDF was overestimated by a mean of 28% for DM < 5 mm, by 17% for 5 mm ≤ DM < 10 mm, and by 9% for DM ≥ 10 mm (P < 0.01). CONCLUSIONS: Interobserver agreement for PDF and PDS was excellent. However, PDF was overestimated in smaller aneurysms and converged to PDS as aneurysm size increased.
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1. College of Medicine (의과대학) > Dept. of Neurology (신경과학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Neurosurgery (신경외과학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Radiology (영상의학교실) > 1. Journal Papers
Yonsei Authors
Kim, Dong Ik(김동익)
Kim, Dong Joon(김동준) ORCID logo https://orcid.org/0000-0002-7035-087X
Kim, Byung Moon(김병문) ORCID logo https://orcid.org/0000-0001-8593-6841
Park, Keun Young(박근영)
Lee, Jae Whan(이재환)
Ihm, Eun Hyun(임은현)
Huh, Seung Kon(허승곤)
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