Which imaging can be used to create a three-dimensional image?

• A. CT and MRI
• B. CT
• C. MRI
• D. Scintigraphy

Answer: (A)

Three-dimensional imaging comes from modalities that collect data across volumes that can be reconstructed into a 3D dataset. CT does this by acquiring many axial slices of the body as X-ray attenuation data, which can be stacked and rendered into a 3D volume. MRI does something similar by capturing signal in multiple planes and compiling it into a volumetric dataset that can be rendered in 3D. Scintigraphy is typically used for planar 2D images of radiotracer distribution, with 3D reconstructions being less common in routine practice. Therefore, CT and MRI together can produce true three-dimensional images, making the option that includes both of these modalities the best choice.