What a vascular sonographer images, the studies they perform, the conditions those studies find, and the credentials and lab setting that define the specialty.
Vascular sonography is the imaging of blood vessels — every artery and vein in the body except the heart itself. A vascular sonographer, sometimes called a vascular technologist, looks at two things at once: the structure of a vessel (its walls, any plaque or clot inside it) and its hemodynamics — the direction, speed, and pattern of the blood moving through it. That second part, the blood flow, is what sets vascular work apart from most other sonography.
What it images
Vascular studies are grouped by region of the body (ARDMS Vascular Technology outline, 2017/v24.1):
- Cerebrovascular — the carotid and vertebral arteries in the neck that supply the brain.
- Peripheral arterial — the arteries of the arms and legs.
- Peripheral venous — the veins of the arms and legs.
- Abdominal vessels — the aorta, the inferior vena cava, and the renal, mesenteric, and portal vessels.
The common studies
- Carotid duplex. Gray-scale imaging plus Doppler of the neck arteries, used to measure narrowing that raises stroke risk (AIUM extracranial cerebrovascular parameter, 2022).
- Venous duplex of the leg. The primary test for deep vein thrombosis (DVT) — a clot in a deep leg vein.
- Peripheral arterial studies. Duplex imaging plus physiologic testing, such as the ankle-brachial index (ABI) and segmental pressures, to measure blood supply to the limbs.
- Abdominal vascular studies. Imaging of the aorta (including screening and surveillance for an abdominal aortic aneurysm), the renal arteries, and the portal system.
- Graft and access surveillance. Checking the function of bypass grafts and dialysis access (fistulas and grafts) over time.
The conditions it helps find
Vascular sonography is the front-line test for deep vein thrombosis, carotid artery stenosis (narrowing that can lead to stroke), abdominal aortic aneurysm, and peripheral arterial disease, which causes leg pain on walking. It also evaluates venous insufficiency and varicose veins, arterial blockage from a clot, pseudoaneurysm, renal artery narrowing, and reduced blood flow to the intestines (ARDMS VT content, 2017/2024; Society for Vascular Ultrasound materials).
The credentials
Vascular has the widest set of parallel credentials of any specialty — three bodies offer one:
- RVT — Registered Vascular Technologist, issued by the American Registry for Diagnostic Medical Sonography (ARDMS). Requires the Sonography Principles and Instrumentation (SPI) physics exam plus the Vascular Technology exam, within five years (ARDMS, 2024).
- RVS — Registered Vascular Specialist, issued by Cardiovascular Credentialing International (CCI). A closely related but distinct credential, with its own pathways (CCI, 2023).
- Vascular Sonography, issued by the American Registry of Radiologic Technologists (ARRT), most often as a credential added to an existing radiologic-technology background (ARRT, 2024).
The RVT and RVS are distinct credentials from different bodies, not two names for the same one. Licensing and Certification covers how to choose a credentialing path.
Where the work happens
Vascular sonographers most often work in a dedicated vascular laboratory — frequently one accredited by the Intersocietal Accreditation Commission (IAC) for vascular testing — as well as in hospital vascular and radiology departments and in outpatient vascular-surgery and cardiology practices. The professional society of the field is the Society for Vascular Ultrasound (SVU). IAC-accredited vascular labs set credential requirements for their technical staff and minimum case volumes per testing area (IAC Vascular Testing Standards, 2024–2025).
A note on pay and outlook
Vascular technologists are listed by the U.S. Bureau of Labor Statistics within the diagnostic medical sonographers occupation (code 29-2032), so the general sonographer figures broadly apply — a median wage of $89,340 and 13 percent projected growth from 2024 to 2034 (BLS, May 2024). Some vascular roles are instead counted under cardiovascular technologists (29-2031), depending on the employer, so the attribution is not perfectly clean. BLS does not publish a separate vascular-only wage.
Last verified: 2026-06-14. Credential requirements and lab standards change; confirm current details with ARDMS, CCI, ARRT, and the IAC. Salary figures are from the BLS and describe the occupation, not any individual job. This page is informational and does not recommend a specialty or credential.