"Computed tomography--an increasing source of radiation exposure". The New England Journal of Medicine. ج. 357 ع. 22: 2277–84. نوفمبر 2007. DOI:10.1056/NEJMra072149. PMID:18046031.
"Computed tomography--an increasing source of radiation exposure". The New England Journal of Medicine. ج. 357 ع. 22: 2277–84. نوفمبر 2007. DOI:10.1056/NEJMra072149. PMID:18046031.