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


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タイトル: Reliability of the Size Evaluation Method for Meningiomas : Maximum Diameter, ABC/2 Formula, and Planimetry Method
著者: Ishi, Yukitomo 著作を一覧する
Terasaka, Shunsuke 著作を一覧する
Yamaguchi, Shigeru 著作を一覧する
Yoshida, Michiharu 著作を一覧する
Endo, Shogo 著作を一覧する
Kobayashi, Hiroyuki 著作を一覧する
Houkin, Kiyohiro 著作を一覧する
キーワード: ABC/2 formula
Maximum diameter
Planimetry method
Volumetric analysis
発行日: 2016年10月
出版者: Elsevier
誌名: World neurosurgery
巻: 94
開始ページ: 80
終了ページ: 88
出版社 DOI: 10.1016/j.wneu.2016.06.108
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.
Rights: © 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
資料タイプ: article (author version)
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 伊師 雪友


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