Ultrasound Specialist

Donald Cedric Wallerson, MD

Cardiologist located in Bronx, NY

Ultrasound exams provide in-depth information about the arteries and blood flow that can be useful in diagnosing and managing many serious conditions. Dr. Donald Wallerson offers state-of-the-art ultrasound exams to help patients in The Bronx, NY, reduce their risks for disease and get the care they need to manage existing issues.

Ultrasound Q & A

What is ultrasound?

An ultrasound is a diagnostic imaging exam that uses sound waves to create detailed images of organs and other structures inside the body. During an ultrasound, the sound waves are emitted from a handpiece called a transducer. The waves penetrate the skin painlessly, bouncing off internal structures and transmitting energy back to the transducer, which in turn sends it to a computer where it can be “translated” into images. In addition to providing detailed images of organs and other structures, ultrasounds can also be used to evaluate functions like circulation around the heart or blood flow through arteries elsewhere in the body, like the neck or the legs. In addition to diagnosing issues, ultrasounds are also used to evaluate the effect of surgery or other treatments and to manage ongoing treatment. Unlike x-rays and CT scans, ultrasounds don’t use ionizing radiation.

What is a carotid ultrasound?

The carotid arteries are the major arteries that supply the brain with oxygen- and nutrient-rich blood. Sometimes, these arteries become blocked or narrowed as a result of a buildup of sticky plaques that form when too much cholesterol is in the blood. When the blood flow to the brain is disrupted, a stroke can occur. Carotid ultrasounds use ultrasound technology to evaluate the carotid arteries, looking for blockages, narrowing and other issues that can interfere with blood flow to the brain. There are two major carotid arteries, one on each side of the neck. During the ultrasound, both arteries will be evaluated.

How is an ultrasound performed?

Ultrasounds are performed in a darkened room to make it easier to view the images on a computer monitor. Prior to the exam, a water-based gel is placed on the skin and on the end of the transducer to facilitate the transmission of the ultrasound energy through the skin. During the exam itself, the transducer is passed over the skin and sometimes pressed firmly against the skin to ensure the clearest images are captured. Most ultrasounds take a half hour or so, and patients can resume their activities immediately afterward. Because ultrasounds are painless and noninvasive, no anesthesia or sedation is required.