Time-resolved echo-shared parallel MRA of the lung: observer preference study of image quality in comparison with non-echo-shared sequences
- 30 June 2005
- journal article
- research article
- Published by Springer Science and Business Media LLC in European Radiology
- Vol. 15 (10), 2070-2074
- https://doi.org/10.1007/s00330-005-2831-9
Abstract
The aim of this study was to evaluate the image quality of time-resolved echo-shared parallel MRA of the lung. The pulmonary vasculature of nine patients (seven females, two males; median age: 44 years) with pulmonary disease was examined using a time-resolved MRA sequence combining echo sharing with parallel imaging (time-resolved echo-shared angiography technique, or TREAT). The sharpness of the vessel borders, conspicuousness of peripheral lung vessels, artifact level, and overall image quality of TREAT was assessed independently by four readers in a side-by-side comparison with non-echo-shared time-resolved parallel MRA data (pMRA) previously acquired in the same patients. Furthermore, the SNR of pulmonary arteries (PA) and veins (PV) achieved with both pulse sequences was compared. The mean voxel size of TREAT MRA was decreased by 24% compared with the non-echo-shared MRA. Regarding the sharpness of the vessel borders, conspicuousness of peripheral lung vessels, and overall image quality the TREAT sequence was rated superior in 75-76% of all cases. If the TREAT images were preferred over the pMRA images, the advantage was rated as major in 61-71% of all cases. The level of artifacts was not increased with the TREAT sequence. The mean interobserver agreement for all categories ranged between fair (artifact level) and good (overall image quality). The maximum SNR of TREAT did not differ from non-echo-shared parallel MRA (PA: TREAT: 273+/-45; pMRA: 280+/-71; PV: TREAT: 273+/-33; pMRA: 258+/-62). TREAT achieves a higher spatial resolution than non-echo-shared parallel MRA which is also perceived as an improved image quality.Keywords
This publication has 15 references indexed in Scilit:
- Effect of Inspiratory and Expiratory Breathhold on Pulmonary PerfusionInvestigative Radiology, 2005
- 3D pulmonary perfusion MRI and MR angiography of pulmonary embolism in pigs after a single injection of a blood pool MR contrast agentEuropean Radiology, 2004
- Contrast-Enhanced Three-Dimensional Pulmonary Perfusion Magnetic Resonance ImagingInvestigative Radiology, 2004
- Heart Failure: Evaluation of Cardiopulmonary Transit Times with Time-resolved MR AngiographyRadiology, 2003
- A brief review of parallel magnetic resonance imagingEuropean Radiology, 2003
- Time-resolved contrast-enhanced pulmonary MR angiography using sensitivity encoding (SENSE)Journal of Magnetic Resonance Imaging, 2003
- New approach to 3D time-resolved angiographyMagnetic Resonance in Medicine, 2002
- Dynamic 3D MR angiography of the pulmonary arteries in under four secondsJournal of Magnetic Resonance Imaging, 2001
- Ultraschnelle MR- Venographie der LungenDer Radiologe, 1998
- Time‐resolved contrast‐enhanced 3D MR angiographyMagnetic Resonance in Medicine, 1996