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  • Title: Effect of radiographic magnification on image contrast of blood vessels.
    Author: Sandor T, Nott P.
    Journal: AJR Am J Roentgenol; 1980 Jan; 134(1):159-92. PubMed ID: 6766009.
    Abstract:
    Blood vessel phantoms 0.5--4 mm in diameter were radiographed with a 0.1 mm x-ray tube with and without scattering medium. The contrast of the blood vessel images was determined by densitometry. Without scattering medium, magnification did not increase the image contrast for 1 mm or larger vessels. With scattering medium, contrast improved significantly due to the reduction of scattered radiation by the air gap between object and film.
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