A comparison of cine CMR imaging at 0.55 T and 1.5 T

Autor: Delaney R. McGuirt, Peter Kellman, Jennifer L Henry, Marcus Y. Chen, Swee Lay Thein, Sujata M Shanbhag, Hui Xue, Adrienne E. Campbell-Washburn, Margaret Lowery, Christine Mancini, W. Patricia Bandettini
Rok vydání: 2019
Předmět:
Adult
Male
lcsh:Diseases of the circulatory (Cardiovascular) system
medicine.medical_specialty
Systole
Heart Ventricles
Ventricular volumes
Magnetic Resonance Imaging
Cine
Left Ventricles
030204 cardiovascular system & hematology
Ventricular Function
Left
030218 nuclear medicine & medical imaging
03 medical and health sciences
0302 clinical medicine
Predictive Value of Tests
medicine
Humans
Radiology
Nuclear Medicine and imaging
In patient
Wall motion
Angiology
Observer Variation
Radiological and Ultrasound Technology
medicine.diagnostic_test
business.industry
Research
Healthy subjects
Reproducibility of Results
Low-field MRI
Magnetic resonance imaging
Stroke Volume
Middle Aged
medicine.anatomical_structure
Cine function
lcsh:RC666-701
Ventricle
Case-Control Studies
cardiovascular system
Ventricular Function
Right
Female
Cardiovascular magnetic resonance
Lower field
Cardiology and Cardiovascular Medicine
Nuclear medicine
business
Cardiomyopathies
Zdroj: Journal of Cardiovascular Magnetic Resonance
Journal of Cardiovascular Magnetic Resonance, Vol 22, Iss 1, Pp 1-10 (2020)
ISSN: 1532-429X
Popis: Background There is a renewed interest in lower field magnetic resonance imaging (MRI) systems for cardiovascular magnetic resonance (CMR), due to their favorable physical properties, reduced costs, and increased accessibility to patients with implants. We sought to assess the diagnostic capabilities of high-performance low-field (0.55 T) CMR imaging for quantification of right and left ventricular volumes and systolic function in both healthy subjects and patients referred for clinical CMR. Methods Sixty-five subjects underwent paired exams at 1.5 T using a clinical CMR scanner and using an identical CMR system modified to operate at 0.55 T. Volumetric coverage of the right ventricle (RV) and left ventricles (LV) was obtained using either a breath-held cine balanced steady-state free-precession acquisition or a motion-corrected free-breathing re-binned cine acquisition. Bland-Altman analysis was used to compare LV and RV end-systolic volume (ESV), end-diastolic volume (EDV), ejection fraction (EF), and LV mass. Diagnostic confidence was scored on a Likert-type ordinal scale by blinded readers. Results There were no significant differences in LV and RV EDV between the two scanners (e.g., LVEDV: p = 0.77, bias = 0.40 mL, correlation coefficient = 0.99; RVEDV: p = 0.17, bias = − 1.6 mL, correlation coefficient = 0.98), and regional wall motion abnormality scoring was similar (kappa 0.99). Blood-myocardium contrast-to-noise ratio (CNR) at 0.55 T was 48 ± 7% of the 1.5 T CNR, and contrast was sufficient for endocardial segmentation in all cases. Diagnostic confidence of images was scored as “good” to “excellent” for the two field strengths in the majority of studies. Conclusion A high-performance 0.55 T system offers good bSSFP CMR image quality, and quantification of biventricular volumes and systolic function that is comparable to 1.5 T in patients. Trial registration Clinicaltrials.gov NCT03331380, NCT03581318.
Databáze: OpenAIRE
Externí odkaz: