Radiology techs and ultrasound techs are two separate roles with different training, different equipment, and different credentials. A standard radiologic technologist is not trained or certified to perform ultrasounds. The two careers overlap in the broader medical imaging field, but they require distinct education and skill sets.
What Radiology Techs Actually Do
Radiologic technologists, also called radiographers, operate equipment that uses radiation to create medical images. Their primary tool is the X-ray machine, and they may also specialize in CT scans, MRI, or mammography. Day to day, they follow physician orders specifying which body parts to image, position patients correctly, operate the imaging equipment, and review the results with radiologists to determine if additional images are needed.
Their training is built around understanding radiation safety, anatomy, and how to produce high-quality images using ionizing radiation or magnetic fields. They typically complete an associate’s degree from a program accredited by the Joint Review Committee on Education in Radiologic Technology (JRCERT), then pass a certification exam through the American Registry of Radiologic Technologists (ARRT).
What Makes Ultrasound a Different Specialty
Ultrasound uses high-frequency sound waves, not radiation. A transducer (scanning probe) sends sound waves into the body that bounce off organs and tissues, and the machine converts those echoes into real-time images. This is a fundamentally different technology from X-rays or CT scans, and operating it well demands a different set of hands-on skills.
Diagnostic medical sonographers don’t just press a probe to the skin and wait. They actively analyze what they see during the scan, distinguish normal from abnormal findings, and summarize their observations for the physician. The role requires real-time clinical judgment that comes from specialized education in sonographic physics, anatomy as it appears on ultrasound, and pathology recognition. Sonography programs are typically accredited through the Commission on Accreditation of Allied Health Education Programs (CAAHEP), a separate body from the one that accredits radiology programs.
Can a Radiology Tech Add Ultrasound Credentials?
Yes, but it requires additional education and certification. The ARRT offers a postprimary pathway that allows a certified radiologic technologist to earn a sonography credential. This involves completing structured coursework in sonography, logging clinical experience hours performing supervised ultrasound exams, and passing an additional ARRT exam specific to sonography.
There’s also a separate credentialing body, the American Registry for Diagnostic Medical Sonography (ARDMS), which offers more specialized certifications in areas like vascular, obstetric, and abdominal imaging. The ARRT credential covers broader imaging roles including sonography, while the ARDMS credential is specifically designed for sonographers who want to specialize. Some employers prefer one credential over the other, but both are widely recognized.
The key point: a radiology tech can’t simply walk over to the ultrasound department and start scanning. They need formal training and a separate credential first.
Why the Distinction Matters
Professional practice standards from the American Society of Radiologic Technologists are clear on this. Only professionals who have completed the appropriate education and obtained certification should perform sonography procedures. Federal and state regulations, accreditation standards, and hospital policies all reinforce this boundary. Each imaging professional is expected to exercise judgment about whether a given procedure falls within the scope of what they’re licensed, educated, and clinically competent to do.
State laws vary. Some states have specific licensing requirements for sonographers, while others rely on employer credentialing policies. But across the board, performing ultrasound exams without proper training and certification falls outside a radiologic technologist’s recognized scope of practice.
Different Physical Demands
The two roles also come with different occupational hazards. Radiology techs work around ionizing radiation and follow strict safety protocols involving lead shielding and exposure monitoring. Sonographers face a different problem: ergonomic injury. Scanning requires sustained, repetitive arm and shoulder movements while applying pressure with the transducer, often in awkward positions. Musculoskeletal disorders are common enough in the profession that OSHA has flagged it as a significant concern, and organizations like the Society of Diagnostic Medical Sonography have published guidelines on reducing scanning time and using assistive technology to protect sonographers’ bodies.
Pay and Job Growth
Sonography tends to pay more. The median annual wage for diagnostic medical sonographers was $89,340 as of May 2024, compared to $78,980 for radiologic technologists and MRI technologists. Job growth for sonographers is also projected at 13% from 2024 to 2034, which is well above average and roughly double the 6% growth rate projected for health technologists overall.
For radiology techs considering whether to cross-train into ultrasound, these numbers make a compelling case. The additional education investment opens the door to higher pay, strong job demand, and a skill set that complements their existing imaging background. But it is genuinely a second specialty, not a minor add-on to an existing role.