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Erschienen in: European Radiology 1/2020

19.06.2019 | Magnetic Resonance

Wall enhancement of intracranial saccular and fusiform aneurysms may differ in intensity and extension: a pilot study using 7-T high-resolution black-blood MRI

verfasst von: Xinke Liu, Zihao Zhang, Chengcheng Zhu, Junqiang Feng, Peng Liu, Qingle Kong, Xianchang Zhang, Qiang Zhang, Hengwei Jin, Huijian Ge, Yuhua Jiang, David Saloner, Youxiang Li

Erschienen in: European Radiology | Ausgabe 1/2020

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Abstract

Purpose

To evaluate and compare wall enhancement patterns in saccular and fusiform intracranial aneurysms using high-resolution black-blood MRI at 7 T.

Methods

Thirty-one patients with 32 unruptured intracranial aneurysms (21 saccular and 11 fusiform) underwent 7-T black-blood MRI. Aneurysm wall enhancement (AWE) was categorized as follows: no wall enhancement (NWE), focal wall enhancement (FWE), and uniform wall enhancement (UWE). The degree of enhancement was scored as follows: 0 (no enhancement), 1 (signal intensity (SI) of the aneurysm wall less than that of the pituitary infundibulum), and 2 (equal to that of the pituitary infundibulum). The chi-squared test was used to compare the AWE pattern and degree between saccular and fusiform aneurysms.

Results

In saccular aneurysms, 12/21 (57%) enhanced. Of these, 9 showed FWE (5 grade 1 and 4 grade 2), and 3 showed UWE (2 grade 1 and 1 grade 2). In fusiform aneurysms, 11/11 (100%) enhanced. Of these, 1 showed FWE and 10 showed UWE. All fusiform aneurysms had grade-2 enhancement. Fusiform aneurysms had more extensive and higher SI AWE than saccular aneurysms (p < 0.01) despite having a similar size (6.9 ± 3.0 mm vs. 8.0 ± 2.9, p = 0.23). For saccular aneurysm, larger aneurysm size was correlated with higher degree of enhancement with Pearson’s r = 0.64 (p = 0.002).

Conclusion

Intracranial fusiform aneurysms had enhancement of higher SI and that covered a more extensive area than saccular aneurysms, which might indicate differences in vessel wall pathology.

Key Points

• Intracranial aneurysm wall enhancement can be reliably characterized by 7-T black-blood MRI.
• AWE in intracranial fusiform aneurysms presents over a larger surface area and with greater signal intensity as compared with that in saccular aneurysms, which might indicate differences in pathology.
• Stronger signal intensity of AWE correlates with the aneurysm size in saccular aneurysms.
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Metadaten
Titel
Wall enhancement of intracranial saccular and fusiform aneurysms may differ in intensity and extension: a pilot study using 7-T high-resolution black-blood MRI
verfasst von
Xinke Liu
Zihao Zhang
Chengcheng Zhu
Junqiang Feng
Peng Liu
Qingle Kong
Xianchang Zhang
Qiang Zhang
Hengwei Jin
Huijian Ge
Yuhua Jiang
David Saloner
Youxiang Li
Publikationsdatum
19.06.2019
Verlag
Springer Berlin Heidelberg
Erschienen in
European Radiology / Ausgabe 1/2020
Print ISSN: 0938-7994
Elektronische ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-019-06275-9

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