Summary
In the quantitative assessment of coronary arterial dimensions from coronary cineangiograms, the contrast catheter is usually used as a scaling device, requiring the definition of the boundaries of a portion of the catheter by semi- or fully- automated contour detection procedures. The image quality of the X-ray radiated catheter is dependent upon the catheter material, the concentration of the contrast agent in the catheter and the kilovoltage of the X-ray source. The effects of these variables on the image quality and on the accuracy of the measurements of the sizes of the filmed catheters were studied for four different catheter materials: woven dacron (wd), polyvinylchloride (pv), polyurethane (pu) and nylon. The following parameters were studied: measured size, image contrast and average brightness gradient along the edges of the displayed catheters. The average differences of the angiographically measured size with the true size for the wd, pv, pu and nylon catheters were +0.2%, −3.2%, −3.5% and +9.8%, respectively. The image contrast at various fillings of the catheters was roughly identical for the wd, pv and pu catheters, but significantly lower for the nylon catheter. Image gradient was highest for the wd catheter, followed by the pv and pu catheters, and lowest for the nylon catheter.
From these data it may be concluded, that the woven dacron catheter is most suitable for quantitative coronary angiographic studies. The polyvinylchloride and polyurethane catheters perform about equally well, but slightly less than the woven dacron catheter. The nylon catheter should not be used for such quantitative studies.
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© 1986 Martinus Nijhoff Publisher, Dordrecht
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Reiber, J.H.C., Serruys, P.W., Slager, C.J. (1986). Assessment of dimensions and image quality of coronary contrast catheters from cineangiograms. In: Quantitative Coronary and Left Ventricular Cineangiography. Developments in Cardiovascular Medicine, vol 51. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-4239-4_6
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DOI: https://doi.org/10.1007/978-94-009-4239-4_6
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