1
|
Le Y, Stein A, Berry C, Kellman P, Bennett EE, Taylor J, Lucas K, Kopace R, Chefd’Hotel C, Lorenz CH, Croisille P, Wen H. Simultaneous myocardial strain and dark-blood perfusion imaging using a displacement-encoded MRI pulse sequence. Magn Reson Med 2010; 64:787-98. [PMID: 20544714 PMCID: PMC2932773 DOI: 10.1002/mrm.22461] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2009] [Accepted: 03/01/2010] [Indexed: 11/06/2022]
Abstract
The purpose of this study is to develop and evaluate a displacement-encoded pulse sequence for simultaneous perfusion and strain imaging. Displacement-encoded images in two to three myocardial slices were repeatedly acquired using a single-shot pulse sequence for 3 to 4 min, which covers a bolus infusion of Gadolinium contrast. The magnitudes of the images were T(1) weighted and provided quantitative measures of perfusion, while the phase maps yielded strain measurements. In an acute coronary occlusion swine protocol (n = 9), segmental perfusion measurements were validated against microsphere reference standard with a linear regression (slope 0.986, R(2) = 0.765, Bland-Altman standard deviation = 0.15 mL/min/g). In a group of ST-elevation myocardial infarction patients (n = 11), the scan success rate was 76%. Short-term contrast washout rate and perfusion are highly correlated (R(2) = 0.72), and the pixelwise relationship between circumferential strain and perfusion was better described with a sigmoidal Hill curve than linear functions. This study demonstrates the feasibility of measuring strain and perfusion from a single set of images.
Collapse
Affiliation(s)
- Yuan Le
- National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Ashley Stein
- National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Colin Berry
- Western Infirmary & Associated Hospital, Dept. Cardiology, Glasgow, Scotland
| | - Peter Kellman
- National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Eric E. Bennett
- National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Joni Taylor
- National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Katherine Lucas
- National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Rael Kopace
- National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | | | | | - Pierre Croisille
- Departement de Radiologie, Hôpital Cardiologique et Pneumologique, L. Pradel, Lyon, France
| | - Han Wen
- National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| |
Collapse
|