Estimation of the diameter of and iodine concentration within blood vessels using digital radiography devices

摘要: A variety of digital radiographic and fluoroscopic devices have been developed which can isolate small concentrations iodine within the cardiovascular system. Using these devices, time dependent subtraction images formed only display opacified vasculature. Theory is presented simple methods for determining vessel diameters concentration from such images. The verified using plexiglass aluminum phantoms imaged with a computerized radiography device. this device diameter 5 mm could be determined to 6% (0.28 mm) even though pixel width in digitized image corresponded 1.34 mm. In same vessel, it estimated that an 46 mg/cm3 10% accuracy.