Which medical imaging method is commonly notated by the acronym US?

The acronym US stands for Ultrasound, which is a medical imaging technique that uses high-frequency sound waves to create images of organs and structures inside the body. Ultrasound is widely utilized due to its non-invasive nature, real-time imaging capabilities, and the absence of harmful ionizing radiation, which is an advantage over methods such as X-ray and CT scans.

In clinical settings, ultrasound is often used for obstetric evaluations, assessing blood flow, diagnosing conditions in organs like the liver or kidneys, and guiding certain procedures. This technology is pivotal in various specialties due to its ability to provide immediate images that can assist in diagnostics and treatment decisions.

The other options listed do not correspond with the acronym US, as Computed Tomography is abbreviated as CT, X-ray Study is simply referred to as X-ray, and Ultrasonic Screening is not a widely recognized term in the medical field. Therefore, Ultrasound is unequivocally the correct answer.