arouse 发表于 2025-3-21 19:48:56
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Cineangiocardiographyod differs little from that of tissue, special precautions need to be taken to obtain an image with the desired structures. This is achieved by selectively injecting a contrast agent via a catheter into the chamber(s) of interest or the arteries to be studied. A brief overview of various contrast ag灾难 发表于 2025-3-22 10:42:43
Cardiovascular Angiography Analysis Systemrelatively large inter- and intraobserver variations have been documented. Moreover, by this technique the degree of luminal narrowing can only be determined in terms of percentage diameter (%-D) narrowing assessed from one or more views. To evaluate the efficacy of modern therapeutic procedures ininflame 发表于 2025-3-22 16:45:49
Validation quantitation techniques of coronary and left ventricular cineangiogramsis system allows the delineation of the boundaries of user-selected coronary arterial segments by means of automated edge detection algorithms. Absolute diameter measurements can be obtained by using the intracardiac catheter as a scaling device; detected contour positions of both the analyzed catheinfinite 发表于 2025-3-22 20:17:04
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Densitometric analysis coronary cineangiogramsion is of limited diagnostic value. The hemodynamic resistance of an obstruction is determined to a great extent by the minimal cross-sectional area of the lumen at the obstruction. Computation of the cross-sectional area reduction from the percentage diameter reduction measured in a single view reqcavity 发表于 2025-3-23 03:22:04
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Structural analysis of the coronary and retinal arterial trees of 35 mm cineframes. No attention has been given to the possibilities of frame- to-frame analysis of the entire coronary tree from nonmagnified images for research or diagnostic purposes. If one would be able to determine in a semi- or fully-automated manner the centerlines and boundaries of all m