
Sonography studies

Echocardiogram
An Echocardiogram (also known as an Echo) is a test of the heart using high-pitched sound waves, or ultrasound waves, to produce a visual display. An echo is a painless, non-invasive test that studies the heart's anatomy and function. The test is used in diagnosis and management of heart disease.
Kalumet, Doppler mitral valve, CC BY-SA 3.0

An Abdominal Aorta Ultrasound is a test focused in the abdominal cavity of the body using high-pitched sound waves, or ultrasound waves, to produce a visual display. The test is used to study the aorta, the main blood vessel leading away from the heart.

A Carotid Ultrasound is a test of the carotid arteries using high-pitched sound waves, or ultrasound waves, to produce a visual display. The ultrasound studies the structure and function of the carotid arteries in your neck which deliver blood from your heart to you brain.
Blausen.com staff. "Blausen gallery 2014". Wikiversity Journal of Medicine. DOI:10.15347/wjm/2014.010. ISSN 20018762., Carotid artery stenosis, CC BY 3.0

Upper/Lower Extremity Arterial Ultrasound
An Arterial Ultrasound is a test focused on visualizing the arteries in either the arms or the legs. The test uses high-pitched sound waves, or ultrasound waves, to produce a visual display that is a safe and painless way of visualizing the arteries.
BodyParts3D/Anatomography, Vein art rotating, CC BY-SA 1.0

Upper/Lower Extremity Venous Duplex
A Venous Ultrasound is a test focused on visualizing the veins in either the arms or the legs. The test uses high-pitched sound waves, or ultrasound waves, to produce a visual display that is a safe and painless way of visualizing the veins.
Etan J. Tal, Ultrasound BPH, CC BY 3.0

Stress Echocardiogram
A Echocardiographic Stress is a combination of two tests; an Echocardiogram and a Treadmill Stress Test. The two test combined give the status of your heart at rest and following stress.
BruceBlaus, Coronary Artery Disease, CC BY-SA 4.0

Renal Artery Duplex Ultrasound
A Renal Artery Duplex Ultrasound is a test using sound waves to assess the blood flow velocities and flow patterns in the aorta and the renal arteries. Renal artery disease, including narrowing (stenosis) due to atherosclerosis, can result in reduced blood-flow to the kidney. This can cause hypertension (high blood pressure). Renal artery stenosis is the most common correctable cause of hypertension. Long-standing, untreated renal artery disease is also an important cause of kidney failure.