In the world of the MRI and the PET scan, it seems that there is “more than one echo of the insalubrious past.”
The doctor, to my grim surprise, was alarmed as well; he scheduled a PET scan.
PET scan (pět)
A cross-sectional image produced by a PET scanner.
Acronym for positron emission tomography, a medical test that is especially useful in showing how tissue or an organ is functioning, as opposed to just showing structure. In a PET scan, radioactive atoms are introduced into the body, where their chemical behavior is exactly the same as similar nonradioactive atoms. The positrons emitted when these nuclei decay collide with electrons in surrounding tissue, producing gamma rays that can then be detected by instruments outside the body.