Advocates of ultrasound contrast have launched a grassroots lobbying effort to persuade the U.S. Food and Drug Administration (FDA) to relax its recent black box warning on the use of two echocardiography contrast agents. The group believes the FDA warning was unnecessarily strident given the safety profile of ultrasound contrast, and that the warning could hamstring further clinical use of cardiac ultrasound contrast.
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![MRI scans are excellent for showing up soft tissue such as ligaments and tendons in joints. This is an MRI scan of a knee. [Image courtesy of GE Healthcare]. Sprained Knee, Anatomy Shoulder, Knee Mri, Meniscus Injury, Human Joints, Radiology Humor, Vascular Ultrasound, The Skeletal System, Knee Ligaments](https://i.pinimg.com/474x/02/08/0f/02080f0cf397c11dc49d82807aee5d32.jpg)
