Sonography Specialties: Cardiac, Vascular, OB/GYN & Abdominal- Sonography is not a single job — it is a family of specialties, each focused on a different part of the body and each tied to its own credentialing exam. Understanding the main types early helps you picture where you might want to work, and it explains something useful for applicants: no matter which specialty you eventually choose, the prerequisites that get you into a program are largely the same. This guide gives a plain-language overview of the major specialties and how they connect back to the courses you complete first.
| Specialty | What it images | Common credential |
|---|---|---|
| Abdominal / General | Organs such as the liver, kidneys, gallbladder, pancreas, and spleen. | RDMS (Abdomen) |
| Obstetric & Gynecologic (OB/GYN) | The female reproductive system and fetal development during pregnancy. | RDMS (OB/GYN) |
| Cardiac (Echocardiography) | The heart’s structure, valves, and blood flow. | RDCS |
| Vascular | Arteries and veins, including blood-flow studies. | RVT |
| Breast | Breast tissue, often alongside mammography. | RDMS (Breast) |
| Musculoskeletal (MSK) | Muscles, tendons, ligaments, and joints. | RMSKS |
Many sonographers begin in a general or abdominal role and add specialties over time. Others train directly into a focused area such as echocardiography. Credentials are earned through the ARDMS credentialing process, which pairs the physics-based SPI exam with a specialty exam.
The specialties also feel different day to day. A few broad contrasts applicants often weigh:
You do not have to choose a specialty before you apply — but knowing the landscape helps you pick a program whose focus matches your interest.
Here is the practical takeaway for applicants: the route into any of these specialties runs through the same prerequisite core. Programs across specialties expect the same foundation — physics, anatomy and physiology, math, and supporting courses — before they will consider your application.
That shared foundation is good news: you can complete prerequisites now without having locked in a specialty, keeping every door open. See the complete sonography prerequisites guide for the full list.
This is an overview, not clinical guidance. Specialty names, scope, and credential options vary, and only an accredited program teaches the clinical skills each one requires. Confirm a program’s specialties and prerequisites with its registrar — we cover admission prerequisites, not scanning technique.
The major specialties are abdominal/general, OB/GYN, cardiac (echocardiography), vascular, breast, and musculoskeletal. Each focuses on a different region of the body and has its own credential.
It depends on your interests and the work setting you want — for example, OB/GYN is patient-facing while cardiac is often hospital-based and fast-paced. You don’t need to decide before applying, since prerequisites are shared.
Generally no. The prerequisite core — physics, A&P, and math — is shared across specialties. The specialty difference appears later, in the program and the credentialing exam you choose.
Cardiac (echocardiography) and vascular sonography often sit at the higher end of the pay range, though earnings also depend on location, employer, and experience.
Continue with the complete sonography prerequisites guide, how sonography credentialing works, and sonographer salary & job outlook.
Authoritative resources: the ARDMS for specialty credentials and BLS Occupational Outlook for diagnostic medical sonographers.
