Beobachtungen bei Cholezystographien mit Biligrafin und die sich daraus ergebenden diagnostischen Folgerungen<sup>*</sup>

Stieve, F. E.

doi:10.1055/s-0029-1212468

Cited by 4 publications

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“…The implications of layering for the anatomic evaluation of the biliary system and for the demonstration of stones have been studied by cholecystography (I, 2, 4, 15, 22), cholegraphy (3,4,20,26,40), and also by cholangiography with emptying of the gall-bladder by cholecystokinin in connection with oral cholecystography (9, 10).…”

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The Layering Phenomenon and Boundary Formation in Radiographs

Nilson¹

1986

Acta Radiologica. Diagnosis

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In a radiographic examination using a water-soluble contrast medium this may form a layer beneath a body fluid. Between the two liquids a zone consisting of a mixture of the two liquids then forms through diffusion. This diffusion layer produces some characteristic features in the radiographic image, an analysis of which was the purpose of the model experiments performed in this investigation. In this analysis of the layering phenomenon the radiographed objects were cylindrical tubes of methyl methacrylate partly filled with water. In some cases a rod was placed concentrically in the tube. Contrast medium was layered below the water. Radiographs were produced with the tube either vertical or inclined, and with either a horizontal or a vertical projection. In the image the layer of contrast medium was visualized as a light field, and the water layer as an overlying relatively dark field. The diffusion layer was visualized as a transitional zone--the diffusion field. Distinct boundaries and Mach lines observed in the bottom field were produced by the interface between the contrast medium and the solid wall where it was touched by the roentgen rays. These boundaries continued into the diffusion field where they gradually became less visible and eventually disappeared. The upper and lower boundaries of the diffusion field were diffuse and associated with dark and light Mach bands, respectively. The upper boundary appeared to be convex upwards. In the case of the inclined model and a vertical beam the diffusion field was elliptical, with a still more diffuse transition to the fields above and below than in the case of the vertical model and a horizontal beam.(ABSTRACT TRUNCATED AT 250 WORDS)

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The Layering Phenomenon and Boundary Formation in Radiographs

Nilson¹

1986

Acta Radiologica. Diagnosis

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Die Röntgendiagnostik der Gallenblase und Gallenwege

Swart¹,

Meyer²,

Herrmann³

et al. 1976

Handbuch Der Medizinischen Radiologie / Encyclopedia of Medical Radiology

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Layering of contrast material in oral cholecystography

Bryk

Moadel

1975

Digest Dis Sci

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Serial erect roentgenograms of the gallbladder during oral cholecystography were taken in 50 patients before and after a fatty meal. In the presence of good opacification, layering of opaque and nonopaque bile was noted in most cases 2 hours after the fatty meal. The degree of layering was related to the extent of gallbladder contraction produced by the fatty meal and the degree to which the gallbladder refilled by the inflow of nonopaque liver bile. The layering phenomenon thus appears to be a manifestation of a normally functioning gallbladder and occurs when the gallbladder refills with fresh nonopaque bile.

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Beobachtungen bei Cholezystographien mit Biligrafin und die sich daraus ergebenden diagnostischen Folgerungen^*

Cited by 4 publications

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The Layering Phenomenon and Boundary Formation in Radiographs

The Layering Phenomenon and Boundary Formation in Radiographs

Die Röntgendiagnostik der Gallenblase und Gallenwege

Layering of contrast material in oral cholecystography

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Beobachtungen bei Cholezystographien mit Biligrafin und die sich daraus ergebenden diagnostischen Folgerungen*

Cited by 4 publications

References 0 publications

The Layering Phenomenon and Boundary Formation in Radiographs

The Layering Phenomenon and Boundary Formation in Radiographs

Die Röntgendiagnostik der Gallenblase und Gallenwege

Layering of contrast material in oral cholecystography

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Product

Resources

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Beobachtungen bei Cholezystographien mit Biligrafin und die sich daraus ergebenden diagnostischen Folgerungen^*