In ultrasound physics, the Near zone, or Fresnel zone, refers to the region closest to the transducer where the ultrasound beam is highly focused and parallel. This critical zone is characterized by its high intensity and optimal lateral resolution, making it ideal for visualizing superficial structures with superior clarity. Understanding the Near zone is fundamental for sonographers to optimize image quality.
For medical ultrasound, leveraging the Near zone ensures precise diagnostic imaging, as it allows for the detailed visualization of tissues and organs located close to the skin surface. Proper transducer selection and focal depth adjustment are essential to maximize the benefits of this zone, providing the sharpest possible images for accurate clinical assessment.
