title: Contrast in computerized transverse axial tomography of brain.
abstract: A study of contrast in photon transmission tomography of brain is presented. Quantitative evaluation of linear attenuation coefficients due to photo-electric, Compton and pair creation effects suggests that the use of photons of a few MeV considerably improves the contrast between white and grey brain matter. The patient dose at different photon energies is calculated.
mesh_terms: D001769:Blood; D001921:Brain / Q000098:blood supply / Q000000981:diagnostic imaging*; D002555:Cerebrospinal Fluid; D004735:Energy Transfer; D006801:Humans; D008027:Light; D011829:Radiation Dosage; D014057:Tomography, X-Ray Computed / Q000379:methods*