Figure 5b:

MR images of the hearts that underwent x-ray/MR imaging or x-ray–guided intrapericardial delivery. (a, b) Short-axis MR images of the heart at baseline (a) and 1 week (b) after delivery of BaCaps containing hMSCs with x-ray/MR imaging guidance show no pericardial effusion or adhesion. (c, d) Short-axis cardiac MR images show pericardial enhancement (arrows), indicative of pericardial thickening 1 week after delivery in an animal that received BaCaps with an injection guided with x-ray only (d) as compared with baseline (c).