Reliability of the Size Evaluation Method for Meningiomas : Maximum Diameter, ABC/2 Formula, and Planimetry Method

Ishi, Yukitomo; Terasaka, Shunsuke; Yamaguchi, Shigeru; Yoshida, Michiharu; Endo, Shogo; Kobayashi, Hiroyuki; Houkin, Kiyohiro

Reliability of the Size Evaluation Method for Meningiomas : Maximum Diameter, ABC/2 Formula, and Planimetry Method

Ishi, Yukitomo; Terasaka, Shunsuke; Yamaguchi, Shigeru et al.

World neurosurgery, 2016, 94, 80-88

Permalink : https://hdl.handle.net/2115/67221

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アクセス権	open access
URI	https://hdl.handle.net/2115/67221
タイトル	Reliability of the Size Evaluation Method for Meningiomas : Maximum Diameter, ABC/2 Formula, and Planimetry Method
著者	Ishi, Yukitomo ; Terasaka, Shunsuke ; Yamaguchi, Shigeru ; Yoshida, Michiharu ; Endo, Shogo ; Kobayashi, Hiroyuki ; Houkin, Kiyohiro
著者名 Ishi, Yukitomo
e-Rad_Researcher 10447055 著者名 Terasaka, Shunsuke
著者名 Yamaguchi, Shigeru
著者名 Yoshida, Michiharu
著者名 Endo, Shogo
著者名 Kobayashi, Hiroyuki
e-Rad_Researcher 90229146 著者名 Houkin, Kiyohiro
言語	英語
キーワード	ABC/2 formula
	Maximum diameter
	Meningioma
	Planimetry method
	Volumetric analysis
発行日	2016-10
出版者	Elsevier
収録物名	World neurosurgery
巻(号)	94
ページ	80-88
抄録	Background: To evaluate the accuracy of tumor size by maximum diameter, ABC/2 formula, and planimetry method using thick-slice and thin-slice magnetic resonance imaging (MRI). Methods: Maximum diameter and tumor volume calculated using ABC/2 formula (V1) and planimetry method with thick-slice MRI (V2) and thin-slice MRI (V3) were examined in 83 meningiomas. Form factor (FF) analysis was performed to assess irregularity of the tumor. V3 values were considered as real tumor volumes. The accuracy of V1 and V2 was evaluated using ratio and difference from V3. Meningiomas were categorized by tumor locations: skull base (anterior, middle, and posterior) and non-skull base (calvaria and other sites). Results: Correlation between maximum diameter and V3 was statistically significant (r = 0.91), but the error was significant in tumors with longer maximum diameters. Correlation between V1 and V3 was significant (r = 0.97). However, V1 tended to be larger in middle skull base meningiomas or in tumors with low FF values (R2 = 0.21). V2 represented relatively accurate volumes in both groups except in the case of small meningiomas. When tumors were demonstrated within 3 fractions on thick-slice MRI, the ratio of V2 to V3 showed significant variability. Conclusions: Using the ABC/2 formula, the volume of meningiomas in the middle skull base or meningiomas with low FF value might be calculated larger than the real tumor volume. The planimetry method with thick-slice MRI demonstrated relatively accurate volumes if the tumor was fractionated in >4 slices.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
権利情報	© 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
PISSN	1878-8750
関連情報	PMID 27381669
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.wneu.2016.06.108