The three-dimensional shape analysis of the M1 segment of the middle cerebral artery using MRA at 3T

Han, Jintao; Qiao, Huiting; Liu, Xuan; Li, Yong; He, Qichun; Wang, Yu; Cheng, Ziman

doi:10.1007/s00234-014-1414-3

Cited by 16 publications

(17 citation statements)

References 25 publications

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“…We found that, unlike ischaemic stroke, atherosclerotic plaque and stenosis at M1 segment were rare, which is consistent with the findings of an autopsy Open access study. 9 As with healthy population, 28 curved MCAs were more prevalent than their straight counterparts. The dorsal and superior-oriented M1 segment curves were found to be the most common shape of MCAs in our study.…”

Section: Discussionmentioning

confidence: 92%

Geometric features of middle cerebral artery are associated with spontaneous basal ganglia intracerebral haemorrhage

et al. 2022

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Background and purposeHaemodynamics around the middle cerebral artery (MCA) and lenticulostriate arteries is believed to play important roles in the vascular rupture and local haemodynamics is subject to vascular geometry. Nonetheless, the relationship between the geometric features of MCA and spontaneous basal ganglia intracerebral haemorrhage (ICH) has not been investigated. To examine the relationship between the MCA geometric features and spontaneous basal ganglia ICH.MethodsThis study was of retrospective and observational nature. The study recruited 158 consecutive hospitalised patients with consecutive CT-confirmed unilateral spontaneous basal ganglia ICH. Clinical data were extracted from electronic medical records, and imaging data were evaluated by two trained radiologists. The MCA-related geometric features were examined and their relationship with spontaneous basal ganglia ICH was analysed. Haemodynamic analyses under different MCA structural features were conducted.ResultsCompared with the contralateral MCA, the ipsilateral MCA had greater M1 diameter ratio (proximal/distal) and a smaller M1/M2 angle and MCA bifurcation angle (p＜0.01). Imaging study showed differences in the MCA shape in both sides on coronal plane (p＜0.05). These MCA features were significantly correlated with the spontaneous ICH in basal ganglia. The greater M1 diameter ratio (proximal/distal), the inferior-oriented M1, the smaller M1/M2 angle and the superior-oriented M1 conditions increased the pressure, from high to low. The greater M1 diameter ratio (proximal/distal) and the inferior-oriented M1 increased the shear stress at the distal end of M1 segment.ConclusionsThe geometric features of MCA were significantly related to the spontaneous ICH in basal ganglia. The risk of haemorrhage, from high to low, included the greater M1 diameter ratio (proximal/distal), the inferior-oriented M1 (distal end), the smaller M1/M2 angle and the superior-oriented M1. Mechanistically, these vascular structural features contribute to increased vascular wall pressure and shear stress, which eventually lead to haemorrhage.

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Section: Discussionmentioning

confidence: 92%

Geometric features of middle cerebral artery are associated with spontaneous basal ganglia intracerebral haemorrhage

et al. 2022

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“…On the left trans‐temporal B‐mode study, we disclosed an abnormal hyperechogenic signal hampering to identify the lesser wing of the sphenoid, which is the classical anatomical landmark for the M1 segment of the MCA (also known as “sphenoidal or horizontal segment”) (Figure ). Nevertheless, the left M1 segment was clearly highlighted by color‐coded Doppler imaging, appearing unusually thin and crescent‐shaped with posterior convexity, and exhibiting significant flow acceleration (Figure ). Such morphologic and hemodynamic characteristics suggested external compression rather than atherosclerotic stenosis, which appears rarely tubular …”

Section: Discussionmentioning

confidence: 99%

Transcranial color‐coded sonography may indirectly reveal an intracranial meningioma

Bartolini

Filippi

Cafforio

2019

J of Clinical Ultrasound

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Meningiomas are extra-axial tumors with a long-standing indolent clinical course.Sphenoid wing meningiomas may slowly grow, spreading toward the orbitofrontal and temporal regions as well as encasing the middle cerebral artery (MCA). Herein, we report the incidental finding of a sphenoid wing meningioma compressing the MCA in a patient who undergone a transcranial sonography study for recurrent speech disorders. We illustrate the associated sonographic "red flags" which should prompt to suspect an underlying compressive space-occupying lesion. K E Y W O R D S brain neoplasm, intracranial arterial stenosis, meningioma

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“…According to the vessel projections on the MIP images of the 3D TOF MRA, the shape of the M1 segment was classified into 3 groups according to a previous study ( 23 ): (I) straight; (II) C-shaped; and (III) S-shaped MCA. In order to reduce the influence due to morphological differences of the other 2 types of arteries, only the C-shaped MCA, called the curved MCA, was included and analyzed in this study.…”

Section: Methodsmentioning

confidence: 99%

Distribution and regional variation of wall shear stress in the curved middle cerebral artery using four-dimensional flow magnetic resonance imaging

Bai¹,

Fu²,

Li³

et al. 2022

Quant Imaging Med Surg

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Background: To investigate the distribution and regional variation of wall shear stress (WSS) in the curved middle cerebral artery (MCA) in healthy individuals using four-dimensional (4D) flow magnetic resonance imaging (MRI).Methods: A total of 44 healthy participants (18 males; mean ages: 27.16±5.69 years) were included in this cross-sectional study. The WSS parameters of mean, minimum, and maximum values, the coefficient of variation of time-averaged WSS (TAWSS CV ), and the maximum values of the oscillatory shear index (OSI) were calculated and compared in the curved proximal (M1) segments. Three cross-sectional planes were selected: the location perpendicular to the beginning of the long axis of the curved M1 segment of the MCA (proximal section), the most curved M1 location (curved M1 section), and the location before the insular (M2) segment bifurcation (distal section). The WSS and OSI parameters of the proximal, curved, and distal sections of the curved M1 segment were compared, including the inner and outer curvatures of the curved M1 section.Results: Of the curved M1 segments, the curved M1 section had significantly lower minimum TAWSS values than the proximal (P=0.031) and distal sections (P=0.002), and the curved M1 section had significantly higher maximum OSI values than the distal section (P=0.001). The TAWSS CV values at the curved M1 section were significantly higher than the proximal (P=0.001) and distal sections (P<0.001). At the curved M1 section, the inner curvature showed a significantly lower minimum TAWSS (P=0.013) and higher maximum OSI values (P=0.002) than the outer curvature.Conclusions: There are distribution variation of WSS and OSI parameters at the curved M1 section of the curved MCA, and the inner curvature of the curved M1 section has the lowest WSS and highest OSI distribution. The local hemodynamic features of the curved MCA may be related to the predilection for ^ ORCID: 0000-0003-0697-4378.

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The three-dimensional shape analysis of the M1 segment of the middle cerebral artery using MRA at 3T

Abstract: The three-view method is convenient for describing the 3D morphology, including the shape information, of the M1 segment. It is a potential method for planning and predicting risk in neurosurgery/neurointervention.

Cited by 16 publications

References 25 publications

Geometric features of middle cerebral artery are associated with spontaneous basal ganglia intracerebral haemorrhage

Geometric features of middle cerebral artery are associated with spontaneous basal ganglia intracerebral haemorrhage

Transcranial color‐coded sonography may indirectly reveal an intracranial meningioma

Distribution and regional variation of wall shear stress in the curved middle cerebral artery using four-dimensional flow magnetic resonance imaging

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