Inflow hemodynamics evaluated by using four-dimensional flow magnetic resonance imaging and the size ratio of unruptured cerebral aneurysms

被引：28

作者：

Futami, Kazuya ^{[1
]}

Nambu, Iku ^{[2
]}

Kitabayashi, Tomohiro ^{[2
]}

Sano, Hiroki ^{[2
]}

Misaki, Kouichi ^{[2
]}

Uchiyama, Naoyuki ^{[2
]}

Nakada, Mitsutoshi ^{[2
]}

机构：

[1] Matto Ishikawa Cent Hosp, Dept Neurosurg, 3-8 Kuramitsu, Haku San, Ishikawa 9208588, Japan

[2] Kanazawa Univ, Sch Med, Dept Neurosurg, Kanazawa, Ishikawa, Japan

来源：

NEURORADIOLOGY | 2017年 / 59卷 / 04期

关键词：

Cerebral aneurysm; Inflow hemodynamics; Inflow jet; Size ratio; 4D flow MR imaging; INTRACRANIAL ANEURYSMS; FLUID-DYNAMICS; SACCULAR ANEURYSMS; RUPTURE STATUS; IN-VIVO; RISK; DISCRIMINANT; PARAMETERS; VELOCITY; VISUALIZATION;

D O I：

10.1007/s00234-017-1801-7

中图分类号：

R74 [神经病学与精神病学];

学科分类号：

摘要：

Purpose Prediction of the rupture risk is critical for the identification of unruptured cerebral aneurysms (UCAs) eligible for invasive treatments. The size ratio (SR) is a strong morphological predictor for rupture. We investigated the relationship between the inflow hemodynamics evaluated on four-dimensional (4D) flow magnetic resonance (MR) imaging and the SR to identify specific characteristics related to UCA rupture. Methods We evaluated the inflow jet patterns and inflow hemodynamic parameters of 70 UCAs on 4D flow MR imaging and compared them among 23 aneurysms with an SR >= 2.1 and 47 aneurysms with an SR <=broken vertical bar 2.0. Based on the shape of inflow streamline bundles with a velocity >= 75% of the maximum flow velocity in the parent artery, the inflow jet patterns were classified as concentrated (C), diffuse (D), neck-limited (N), and unvisualized (U). Results The incidence of patterns C and N was significantly higher in aneurysms with an SR >= 2.1. The rate of pattern U was significantly higher in aneurysms with an SR ae broken vertical bar 2.0. The maximum inflow rate and the inflow rate ratio were significantly higher in aneurysms with an SR >= 2.1. Conclusions The SR affected the inflow jet pattern, the maximum inflow rate, and the inflow rate ratio of UCAs. In conjunction with the SR, inflow hemodynamic analysis using 4D flow MR imaging may contribute to the risk stratification for aneurysmal rupture.

引用

页码：411 / 418

页数：8

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