| 摘要 |
<p>Compositions and methods for determining a location of a structure to be monitored within a body are provided. The composition includes an inflatable balloon configured to be deformable when inflated and includes a radiopaque marker and an echogenic marker. When in use, the echogenic marker is distinguishable from the radiopaque marker. The radiopaque marker is used to determine an absolute location of the balloon in the body, for example in relation to a landmark structure (such as a bone). The echogenic marker is used to determine the location of the structure to be monitored relative to the edge of the balloon. The two locations or distances are combined to determine the location of the structured to be monitored relative to the landmark structure.</p> |
