Characterization of Carotid Atherosclerosis and Detection of Soft Plaque with Use of Black-Blood MR Imaging

Yoshida, Kazumichi; Narumi, Osamu; Chin, Masaki; Inoue, Katsumi; Tabuchi, Takashi; Oda, Kenichiro; Nagayama, Masako; Egawa, N.; Hojo, Masato; Goto, Yasunobu; Watanabe, Yuji; Yamagata, Sen

doi:10.3174/ajnr.a1015

Cited by 124 publications

(85 citation statements)

References 41 publications

(49 reference statements)

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“…[9][10][11] Several imaging modalities have been used to detect unstable plaques by characterizing intraplaque features. Unstable plaques are characterized by mobility and/or low echogenicity on ultrasonography, low attenuation on CT, and hyperintensity on MR imaging.…”

Section: Discussionmentioning

confidence: 99%

“…Various imaging protocols and techniques have been applied in MR plaque imaging, and the results in previous reports have varied. 5,7,[10][11][12][13]16,17 Of these protocols, an electrocardiographgated 2D fast SE technique with a black-blood method is commonly applied. 10,16 However, this method is generally complicated and time-consuming and can obtain only a few sections of imaging.…”

Section: Discussionmentioning

confidence: 99%

“…Unstable plaques are characterized by mobility and/or low echogenicity on ultrasonography, low attenuation on CT, and hyperintensity on MR imaging. [1][2][3][4][5][6][7][11][12][13][14][15] However, the diagnostic performance of all of these modalities varies considerably and remains imperfect.…”

Section: Discussionmentioning

confidence: 99%

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Predicting Carotid Plaque Characteristics Using Quantitative Color-Coded T1-Weighted MR Plaque Imaging: Correlation with Carotid Endarterectomy Specimens

Narumi

Sasaki

Ohba³

et al. 2013

American Journal of Neuroradiology

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BACKGROUND AND PURPOSE: MR plaque imaging is used to evaluate the risk of embolic complications during carotid endarterectomy and carotid artery stent placement. However, its performance for characterizing intraplaque components has varied across studies and is generally suboptimal. Hence, we correlated MR imaging results with histologic findings to determine whether a combination of highcontrast T1-weighted imaging and quantitative image analysis could readily determine plaque characteristics.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Predicting Carotid Plaque Characteristics Using Quantitative Color-Coded T1-Weighted MR Plaque Imaging: Correlation with Carotid Endarterectomy Specimens

Narumi

Sasaki

Ohba³

et al. 2013

American Journal of Neuroradiology

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“…10) In this study, the patients were divided into two groups: a group with an SIR of ≥1.5, at which plaque fragility may increase, and a group with an SIR of <1.5. 10,11) Furthermore, some studies reported that plaques detected as a high signal intensity on time of flight (TOF) images were fragile 12,13) and we also confirmed findings on TOF images, and retrospectively examined the presence or absence of a high signal intensity in the plaque area in previous patients. Furthermore, it was indicated that plaques in patients with symptomatic lesions were more fragile than in those with asymptomatic lesions; therefore, the results were examined with respect to the presence or absence of symptoms.…”

Section: Plaque Assessmentmentioning

confidence: 99%

Expansion of Stent and Lumen Diameters on Follow-up after Carotid Artery Stenting in Patients with Carotid Artery Stenosis

Fujimoto

Hashimoto

Nishiguchi

et al. 2017

JNET

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Purpose:We examined postoperative stent and lumen expansions after carotid artery stenting (CAS) in patients with carotid artery stenosis. Furthermore, we investigated factors influencing the stent and lumen expansions in a follow-up period.Subjects: 134 cases (128 patients) who underwent CAS and performed follow-up cerebral angiography 12 months after CAS were enrolled into this study. The stenosis rate based on the stent and lumen diameters on follow-up angiography as a percentage of that immediately after CAS was evaluated.Results: Both the stent and lumen diameters were significantly dilated 12 months after CAS (p <0.001). There were no significant stent-type-related differences in the stent expansion rate. In the symptomatic stenosis group, this expansion rate was significantly higher than in the asymptomatic stenosis group (p = 0.02). With respect to the presence or absence of a high signal intensity on time of flight (TOF) magnetic resonance (MR) images, the stent expansion rate was significantly higher in the high signal intensity group (p = 0.006). In patients with a plaque/sternocleidomastoid muscle signal intensity ratio of ≥1.50 on plaque images, it was significantly higher than in those with a value of <1.50 (p = 0.006).However, there were no significant differences in the lumen expansion rate among the groups. Conclusion:Both the stent and vascular lumen were dilated 12 months after CAS. Plaque fragility influenced the stent expansion rate; however, there were no significant factor-related differences in the vascular lumen expansion rate.

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“…[2][3][4] Fibrous cap, lipid-rich necrotic core, and intraplaque hemorrhage can be distinguished by studying the signal pattern of plaque on images acquired by T 1 -(T 1 W) and T 2 -weighted (T 2 W) imaging.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Improved Motion-Sensitized Driven Equilibrium (iMSDE) for Multi-contrast Vessel Wall Screening

Obara

Cauteren

Honda³

et al. 2014

magn reson med sci

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Purpose: We assessed the improved motion-sensitized driven equilibrium (iMSDE) technique for multiple contrast 3-dimensional vessel wall imaging at 3T.Methods: Carotid images were obtained using iMSDE combined with turbo field echo (iMSDE-TFE) and conventional double inversion-recovery turbo spin-echo (DIR-TSE) in 5 healthy adult subjects. The tissue signal-to-noise efficiency (SNR eff ), SNR divided by the square root of scan time, lumen-tissue contrast-to-noise efficiency (CNR eff ), CNR divided by the square root of scan time, and tissue signal intensity ratio (SIR) were measured in both techniques and compared.Results: The iMSDE-TFE had higher SNR eff and CNR eff (P < 0.01) and strong correlation in SIR (R = 0.92) compared to DIR-TSE.Conclusion: The iMSDE-TFE sequence is an efficient technique for vessel wall screening.

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Characterization of Carotid Atherosclerosis and Detection of Soft Plaque with Use of Black-Blood MR Imaging

Cited by 124 publications

References 41 publications

Predicting Carotid Plaque Characteristics Using Quantitative Color-Coded T1-Weighted MR Plaque Imaging: Correlation with Carotid Endarterectomy Specimens

Predicting Carotid Plaque Characteristics Using Quantitative Color-Coded T1-Weighted MR Plaque Imaging: Correlation with Carotid Endarterectomy Specimens

Expansion of Stent and Lumen Diameters on Follow-up after Carotid Artery Stenting in Patients with Carotid Artery Stenosis

Assessment of Improved Motion-Sensitized Driven Equilibrium (iMSDE) for Multi-contrast Vessel Wall Screening

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