Yes, a radiologist is typically the physician who officially reads and interprets ultrasound images. While you may interact only with the sonographer (the technologist who performs the scan), your ultrasound images are sent to a radiologist who reviews them, writes a diagnostic report, and sends that report to the doctor who ordered your exam.
What the Sonographer Does vs. the Radiologist
The person in the room with you during an ultrasound is usually a sonographer, also called an ultrasound technologist. Their job is to capture the best possible images by positioning the probe, adjusting settings, and documenting what they see. Sonographers are trained to recognize anatomy and abnormalities, and they often write preliminary findings designed to assist the radiologist during interpretation.
The radiologist, a licensed physician with specialized training in medical imaging, then reviews those images and findings separately. They place the ultrasound results in your broader clinical context: your symptoms, medical history, lab work, and any prior imaging. From there, they produce a final signed report with a diagnostic opinion. When something is clearly abnormal, the report states it directly. When the findings are ambiguous, the radiologist ranks the most likely possibilities and may recommend follow-up imaging.
This two-step process is why your sonographer generally won’t tell you what they see during the exam. In the United States, sonographers are not permitted to provide results to patients. They defer those conversations to the interpreting radiologist or your referring physician. Because sonographers are not medical doctors, they are not in a position to answer questions about what a finding means for your health or what treatment you might need. If something unexpected or alarming comes up during the scan, they contact your doctor directly.
Qualifications Required to Interpret Ultrasounds
The American College of Radiology sets clear standards for who can officially interpret ultrasound exams. Board-certified radiologists qualify through their residency training and certification exams. Non-radiologist physicians can also qualify, but the bar is high: they must document involvement with at least 500 ultrasound examinations, including both performing and interpreting a broad spectrum of scan types, either during residency, fellowship, or supervised postgraduate training.
To maintain their credentials, interpreting physicians must read a minimum of 200 ultrasound studies every three years or meet ongoing board certification requirements. These aren’t casual benchmarks. They exist because ultrasound is uniquely operator-dependent, meaning the quality of both the images and the interpretation depends heavily on experience and skill.
When Someone Other Than a Radiologist Reads the Ultrasound
Radiologists handle the vast majority of formal ultrasound interpretations, but there are important exceptions. Point-of-care ultrasound (sometimes called POCUS) is a focused exam performed and interpreted by the treating clinician right at the bedside. Emergency medicine physicians were among the first to adopt this approach in the 1990s, using ultrasound to quickly answer specific clinical questions: Is there fluid around the heart? Is the aorta enlarged? Is there an ectopic pregnancy?
These bedside scans are not the same as a full diagnostic ultrasound ordered through a radiology department. They’re narrower in scope and designed to guide immediate decisions, not replace a comprehensive radiologist report. If you’re in the emergency room and a doctor scans your abdomen with a portable ultrasound, they’re interpreting it themselves in real time. A full diagnostic ultrasound ordered later would still go to a radiologist.
Other specialists also interpret ultrasounds within their area of expertise. Cardiologists read echocardiograms (heart ultrasounds). Obstetricians interpret routine prenatal scans. For complex cases, subspecialists get involved: pediatric cardiologists interpret fetal heart ultrasounds, neuroradiologists review fetal brain imaging, and maternal-fetal medicine specialists handle high-risk pregnancy scans. Fetal neuroimaging, for instance, has become so demanding that experts have called for dedicated 12- to 18-month fellowship programs specifically for physicians interpreting these studies.
Preliminary vs. Final Reports
If you have an ultrasound after hours or on a weekend, your images may first receive a preliminary interpretation from a radiologist reading remotely (called a teleradiologist). The next business day, a local radiologist reviews those same images and issues a final report. Most of the time these two readings agree. When they don’t, the differences are classified as either minor or actionable, meaning they would change how your doctor manages your care. Actionable discrepancies, such as a missed case of appendicitis, are flagged and communicated to your ordering provider that morning.
This layered system exists as a safety net. The preliminary read ensures urgent findings get communicated quickly, while the final read provides the definitive interpretation that goes into your medical record.
How Long Results Take
For routine ultrasounds, the radiologist’s final report is typically completed within 24 to 48 hours after your appointment. Your referring doctor receives the report and then communicates the results to you, either through a follow-up visit, phone call, or patient portal message.
Urgent or emergency scans follow a faster track. The radiologist reviews them the same day, and if immediate action is needed, your doctor may be contacted directly. In a hospital setting, critical findings are often communicated within minutes.
If you’re waiting longer than a few days for routine results, it’s worth calling your doctor’s office. The radiologist’s report may already be sitting in your chart, waiting for someone to relay it to you.