Which resolution describes the ability to distinguish two structures in a path perpendicular to the sound beam?

Which resolution describes the ability to distinguish two structures in a path perpendicular to the sound beam?

• A. Lateral
• B. Angular
• C. Transverse
• D. Azimuthal

Answer: (A)

In ultrasound imaging, the ability to distinguish two structures that lie side by side across the width of the beam is called lateral resolution. This measures how well you can separate two reflectors that are perpendicular to the direction the sound is traveling. Lateral resolution depends on the beam width: a narrower, more focused beam makes it possible to separate structures that are close together across the image, while a wider beam blends them. The other terms describe different aspects of direction or angle rather than width across the beam—for example, axial resolution concerns separation along the beam’s path, and angular/azimuthal concepts relate to separation by angle rather than side-by-side space.

In ultrasound imaging, the ability to distinguish two structures that lie side by side across the width of the beam is called lateral resolution. This measures how well you can separate two reflectors that are perpendicular to the direction the sound is traveling. Lateral resolution depends on the beam width: a narrower, more focused beam makes it possible to separate structures that are close together across the image, while a wider beam blends them. The other terms describe different aspects of direction or angle rather than width across the beam—for example, axial resolution concerns separation along the beam’s path, and angular/azimuthal concepts relate to separation by angle rather than side-by-side space.