In 3D ultrasound, which statement is true?

• A. It reconstructs volume data from multiple 2D images
• B. It provides only 2D slices
• C. It cannot be used for volumetric analysis
• D. It reduces image quality

Answer: (A)

3D ultrasound builds a volume by stitching together multiple 2D images acquired from different planes to create a three-dimensional dataset. This reconstruction lets you view and measure structures in space, perform volumetric analysis, and render the anatomy in various perspectives. That makes the statement about reconstructing volume data from multiple 2D images the accurate description of what 3D ultrasound does.

The idea of providing only 2D slices ignores the volumetric capability, and saying it cannot be used for volumetric analysis contradicts how 3D ultrasound is used in practice. The notion that image quality is reduced by default isn’t inherent to 3D imaging; while there can be trade-offs in resolution or artifact management, 3D imaging itself doesn’t automatically mean lower quality.