Ronald Jack Jaszczak

https://cdn.iopscience.com/images/0031-9155/51/13/R07/Full/pmb198701fig05.jpg

coined the term single photon emission computed tomography – SPECT

REFERENCES:

https://cdn.iopscience.com/images/0031-9155/51/13/R07/Full/pmb198701fig05.jpg