12.DSAの応用による頚部動脈の血流動態の検討(I.Digital Subtraction Angiographyの臨床利用について)(第12回放射線技術)

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High resolution at the low contrast region in digital subtraction angiography (DSA), enables visualization of several arteries at the same time by intravenous injection of the contrast medium. Taking this advantage, we tried to analyze the functional hemodynamics of the cervical carotid arteries in normal subjects and in patients with stenosis or occulusion. Shimadzu DAR-100 and Sakura microdensitometers were used in this study. Densitometry was performed at the definite level of the bilateral common carotid arteries in each of the frames. Then, relative densities (S) in cross section of the vessel were calculated by means of subtracting background density. Furthermore, S was divided by the square of the vessel radius (this value was defined as true density : D) to correct the differences of the relative densities caused by the variation of the vessel diameter. Therefrom, time-density curve (T-D curve) was obtained by using Gamma distribution function as an approximation. We compared the T-D curve together with the other parameters such as peak time, mean transit time, differential curve and mode of transit time led from the T-D curve, of the stenotic artery with those of the intact artery. In normal subjects, there was no difference in parameters between the left and the right, but in patients with stenosis or occlusion the delay of the peak time or the changes in T-D curve was seen in lesion side.
公益社団法人日本放射線技術学会の論文
1985-03-01

12.DSAの応用による頚部動脈の血流動態の検討(I.Digital Subtraction Angiographyの臨床利用について)(第12回放射線技術)

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