Fast, three-dimensional free-breathing MR imaging of myocardial infarction: a feasibility study. |
| |
Authors: | Manojkumar Saranathan Carlos E Rochitte Thomas K F Foo |
| |
Institution: | Applied Sciences Laboratory, GE Medical Systems, Baltimore, Maryland, USA. manojk@ee.iisc.ernet.in |
| |
Abstract: | Imaging delayed hyperenhancement of myocardial infarction is most commonly performed using an inversion recovery (IR) prepared 2D breathhold segmented k-space gradient echo (FGRE) sequence. Since only one slice is acquired per breathhold in this technique, 12-16 successive breathholds are required for complete anatomical coverage of the heart. This prolongs the overall scan time and may be exhausting for patients. A navigator-echo gated, free-breathing, 3D FGRE sequence is proposed that can be used to acquire a single slab covering the entire heart with high spatial resolution. The use of a new variable sampling in time (VAST) acquisition scheme enables the entire 3D volume to be acquired in 1.5-2 min, minimizing artifacts from bulk motion and diaphragmatic drift and contrast variations due to contrast media washout. |
| |
Keywords: | delayed hyperenhancement myocardial infarction cardiac MRI navigator gating inversion recovery |
|
|