Which pair is credited with inventing the first SPECT camera, the Mark IV?

Which pair is credited with inventing the first SPECT camera, the Mark IV?

• A. Hal Anger
• B. Roy Edwards and David Kuhn
• C. George de Hevesy
• D. Ernest Lawrence

Answer: (B)

The idea being tested is how computed tomography for nuclear medicine evolved from a fixed detector to a rotating, tomographic system. A SPECT camera builds on the gamma-camera detector by moving the detector around the patient and collecting data from many angles, then using reconstruction to form cross-sectional images of tracer distribution. That leap—from static planar views to rotating data and tomographic reconstruction—made true SPECT possible. The first SPECT camera, the Mark IV, is credited to Roy Edwards and David Kuhn because they were the team who designed and implemented the early rotating-camera system that enabled 3D imaging from single-photon emissions. Their work demonstrated how rotating acquisitions coupled with reconstruction algorithms could produce volumetric images, marking the transition from conventional gamma cameras to functional, tomographic imaging. For context, the other names on the list contributed in related areas: Hal Anger invented the original gamma camera technology, which provided the detector foundation for nuclear imaging but did not by itself create a rotating, tomographic system. George de Hevesy was pivotal in early radiochemistry and tracer development, and Ernest Lawrence built the cyclotron for isotope production. The key advance for SPECT was the move to rotation and reconstruction, credited to Edwards and Kuhn with the Mark IV.

The idea being tested is how computed tomography for nuclear medicine evolved from a fixed detector to a rotating, tomographic system. A SPECT camera builds on the gamma-camera detector by moving the detector around the patient and collecting data from many angles, then using reconstruction to form cross-sectional images of tracer distribution. That leap—from static planar views to rotating data and tomographic reconstruction—made true SPECT possible.

The first SPECT camera, the Mark IV, is credited to Roy Edwards and David Kuhn because they were the team who designed and implemented the early rotating-camera system that enabled 3D imaging from single-photon emissions. Their work demonstrated how rotating acquisitions coupled with reconstruction algorithms could produce volumetric images, marking the transition from conventional gamma cameras to functional, tomographic imaging.

For context, the other names on the list contributed in related areas: Hal Anger invented the original gamma camera technology, which provided the detector foundation for nuclear imaging but did not by itself create a rotating, tomographic system. George de Hevesy was pivotal in early radiochemistry and tracer development, and Ernest Lawrence built the cyclotron for isotope production. The key advance for SPECT was the move to rotation and reconstruction, credited to Edwards and Kuhn with the Mark IV.