Figure 3d:

Images show intrapericardial delivery via x-ray/MR imaging or x-ray–only guidance. (a) Fluoroscopically guided pericardial puncture shows the lack of visualization of coronary vasculature and myocardial borders. (b) Image obtained with x-ray/MR imaging (gray scale indicates the x-ray portion of the image, and color indicates MR imaging) of the pig heart shows the coronary vasculature and ventricular boundaries. (c) C-arm CT image of the heart obtained immediately after BaCaps delivery demonstrates the presence of free-floating opaque BaCaps (arrow) in the pericardial space. (d) C-arm CT image in the same animal as in c shows the distribution of the BaCaps (arrows) 1 week after transplantation.