The SPECT camera created the first what?

• A. 2D images of organ function
• B. 3D images of organ function
• C. 3D maps of bone structure
• D. 3D images of tissue morphology

Answer: (B)

SPECT imaging demonstrates functional information in three dimensions by reconstructing tomographic volumes from multiple projections around the patient. By rotating the gamma camera and collecting emissions from many angles, computers build a 3D map of how a radiotracer is distributed inside an organ. This distribution reflects function, such as metabolic activity or blood flow, rather than just the organ’s shape. That’s why the first truly three-dimensional images produced by SPECT are of organ function in 3D space.

In contrast, options about 2D images represent planar views, which don’t provide depth, and options about bone structure or tissue morphology describe anatomical structure rather than function, typically captured by structural imaging modalities like CT or MRI.