“An X-ray specialist married one of his patients. Everybody wondered what he saw in her”

A medical joke about an X-ray technician is:
   
“Did you hear about the X-ray technician who married one of his patients? Everybody wondered what he saw in her.”
 
A form of the joke has been cited in print since at least 1938.
 
     
Wikipedia: X-ray
X-rays make up X-radiation, a form of electromagnetic radiation. Most X-rays have a wavelength ranging from 0.01 to 10 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz (3×1016 Hz to 3×1019 Hz) and energies in the range 100 eV to 100 keV. X-ray wavelengths are shorter than those of UV rays and typically longer than those of gamma rays. In many languages, X-radiation is referred to with terms meaning Röntgen radiation, after the German scientist Wilhelm Röntgen, who usually is credited as its discoverer, and who had named it X-radiation to signify an unknown type of radiation.
 
12 February 1938, Council Bluffs (IA) Nonpariel, pg. 4, col. 2:
An X-ray specialist in southwest Iowa recently married a nurse and everybody wondered what he saw in her, it is reported.
 
15 February 1938, Iola (KS) Daily Register, “The Kansas Merry-Go-Round,” pg. 4, col. 6:
An X-ray specialist in northwest Kansas recently married a nurse and everybody wondered what he saw in her, it is reported.
   
23 February 1962, Orlando (FL) Evening Star, “On the Town” by Jean Yothers, pg. 1-B, col. 1:
Today’s Demitasse: When Doris announced that she was engaged to Dr. Brown, the X-ray specialist, all her friends wondered what he saw in her.
   
Google Books
Medical Humor:
Medical Nonsense to Tickle Your Funnybone
By Thomas F. Shubnell, Ph.D.
Published by author
2008
Pg. 21:
Did you hear about the X-ray technician who married one of his patients? Everybody wondered what he saw in her.
 
Twitter
Judith Ann‏
@prissy121
Did you hear about the X-ray specialist who married one of his patients? Everybody wondered what he saw in her
8:30 PM - 25 Sep 2009
     
Twitter
Jokes UK 🔞‏
@jokesuk
Did you hear about the X-ray specialist who married one of his patients…
Everybody wondered what he saw in her!
1:13 PM - 9 Oct 2017
 
Twitter
lorraine Jo King‏
@LahLahBean
#badjokethursday Did you hear about the X-ray specialist who married one of his patients? Everybody wondered what he saw in her ☺
1:25 AM - 15 Feb 2018