1.5T Magnetic resonance vessel wall imaging. Is it good enough?

Congress:

ECR 2020

Poster Number:

C-15001

Type:

Educational Exhibit

Keywords:

Neuro, Arteries / Aorta, CNS, Head and neck, CT-Angiography, MR, MR-Angiography, Imaging sequences, Technical aspects, Arteriosclerosis, Blood, Dissection, Not applicable

Authors:

P. Fuentes¹, C. Leiva¹, S. Cortés², F. Castilla², J. Recasens¹, P. Cox², F. Torres²; ¹Viña Del Mar/CL, ²Valparaíso/CL

DOI:

10.26044/ecr2020/C-15001

DOI-Link:

https://dx.doi.org/10.26044/ecr2020/C-15001

Fig. 1: Schematical representation of possible findings in VWMRI

Fig. 2: 71 years old woman with past medical history of hypertension, chronic smoking...

Fig. 3: 56 years old male with medical history of hypertension diabetes mellitus type 2...

Fig. 4: 56 years old female with past medical history of hypertension and diabetes...

Learning objectives

Show our experience with black blood vessel wall magnetic resonance imaging (VWMRI) using a magnetic field of 1.5T. Review imaging findings through a case series

Background

VWMRI is a relatively new technique that allows neuroradiologists to further characterize vasculopathies by assessing and characterizing vessel wall lesions and optimize the differential diagnosis assessment and risk evaluation of future ischemic lesions. Traditional methods to visualize intracranial and extracranial arteries are digital subtraction angiography (DSA), CT angiography, Doppler ultrasound and MR angiography (MRA). All of these techniques, except for ultrasound, focus on the lumen and not the wall itself. Technique The recommended technical criteria are: - High spatial resolution: must be enough to distinguish...

Findings and procedure details

Our technique VWMRI was performed at our institution using a 1.5 T Signa HDxt scanner (General Electric Healthcare, Milwaukee, Wisconsin) with a 16-channel neurovascular head coil. Protocols are shown in Table 1. Presaturations bands were also used to aid the suppression of blood. The acquisition of other sequences or studies varied depending on the clinical context. 34 VWMRI studies were conducted between April 2018 and September 2019. Diagnostic reports and images were gathered and reviewed along with two neuroradiologists. Pathologies in VWMRI Atherosclerosis Plaques are...

Conclusion

VWMRI is a recently developed modality that complements the luminal study of vessels and aims to improve the differential diagnosis of the intracranial and extracranial artheriopathies. Our series shows that is feasible to use MR machines with a magnetic field of 1.5 T in the VWMRI study with adequate diagnostic performance.

Personal information and conflict of interest

P. Fuentes; Viña Del Mar/CL - nothing to disclose C. Leiva; Viña del Mar/CL - nothing to disclose S. Cortés; Valparaíso/CL - nothing to disclose F. Torres; Valparaíso/CL - nothing to disclose P. Cox; Valparaíso/CL - nothing to disclose F. Castilla; Valparaíso/CL - nothing to disclose J. Recasens; Viña del Mar/CL - nothing to disclose

References

-Saba L, Yuan C, Hatsukami TS, Balu N, Qiao Y, DeMarco JK, et al. Carotid Artery Wall Imaging: Perspective and Guidelines from the ASNR Vessel Wall Imaging Study Group and Expert Consensus Recommendations of the American Society of Neuroradiology. AJNR Am J Neuroradiol. 2018 Feb;39(2):E9-31. -Mandell DM, Mossa-Basha M, Qiao Y, Hess CP, Hui F, Matouk C, et al. Intracranial Vessel Wall MRI: Principles and Expert Consensus Recommendations of the American Society of Neuroradiology. AJNR Am J Neuroradiol. 2017 Feb;38(2):218-29. -Sui B, Gao P. High-resolution...