If waves are obscured by artifacts in a medical imaging test, it could result in an inaccurate or inconclusive diagnosis. Artifacts are anomalies or errors in the image that are not related to the anatomy or pathology of the patient. They can be caused by a variety of factors, such as patient motion, equipment malfunction, or improper image acquisition. When waves are obscured by artifacts, it can be difficult or impossible to accurately interpret the image and make a diagnosis. In some cases, the test may need to be repeated or additional imaging tests may need to be performed to obtain a clear image.