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True real-time cardiac MRI in free breathing without ECG synchronization using a novel sequence with radial k-space sampling and balanced SSFP contrast mode
- Source :
- The International Journal of Cardiovascular Imaging
- Publication Year :
- 2013
- Publisher :
- Springer Science and Business Media LLC, 2013.
-
Abstract
- We investigated a novel sequence with radial k-space sampling, gridding and sliding window reconstruction with bSSFP contrast that allows for true real-time functional cardiac evaluation independent from respiration and ECG triggering. 12 healthy volunteers underwent 1.5 T cardiac MRI. Single-shot short axis views were acquired with a) standard retrospectively ECG-gated segmented breath-hold (bh) bSSFP and with the real-time radial bSSFP sequence with a nominal temporal resolution of b) 16 fps (frames per second) and c) 40 fps. Radial bSSFP were acquired during free breathing without ECG synchronization. Left ventricular functional parameters (EDV, ESV, SV and EF) were compared and quality of wall motion depiction was assessed. Contrast-to-noise-ratio (CNR) of myocardium/blood pool in the left ventricle was calculated. EF showed excellent correlation (Bland-Altman r = 0.99; Lin rho = 0.91) between bh-bSSFP (65 %) and 40 fps radial (64 %) and moderate correlation (r = 0.84, rho = 0.20) with 16 fps radial bSSFP (56 %). While EDV was in good agreement for all three sequences, ESV was significantly overestimated with 16 fps radial bSSFP. Despite lower CNR, image quality for wall motion assessment was rated significantly better for 40 fps compared to 16 fps radial bSSFP due to the faster temporal resolution. Left ventricular functional analysis with fast true real-time radial bSSFP is in good agreement with standard ECG-gated bh-bSSFP. The independency from ECG synchronization and breathing promises a robust method for patients with impaired cardiopulmonary status in whom breath-hold and good quality ECG cannot be achieved.
- Subjects :
- Adult
Male
Image quality
Cardiac-Gated Imaging Techniques
Magnetic Resonance Imaging, Cine
Ventricular Function, Left
Electrocardiography
Young Adult
Predictive Value of Tests
Reference Values
Image Interpretation, Computer-Assisted
medicine
Humans
Radiology, Nuclear Medicine and imaging
Cardiac imaging
medicine.diagnostic_test
business.industry
Respiration
Stroke Volume
Magnetic resonance imaging
Real-time MRI
Stroke volume
Middle Aged
Healthy Volunteers
medicine.anatomical_structure
Ventricle
Breathing
Female
Cardiology and Cardiovascular Medicine
business
Nuclear medicine
Subjects
Details
- ISSN :
- 15730743 and 15695794
- Volume :
- 29
- Database :
- OpenAIRE
- Journal :
- The International Journal of Cardiovascular Imaging
- Accession number :
- edsair.doi.dedup.....d3699df195fa21d0b8b2dff868c36561