Fast digital recording of X-ray dilution curves: a preliminary evaluation

A digital radiography apparatus that is implemented on a computed tomography (CT) scanner allows for the fast recording of dilution curves of thin sections of a CT scan. Densities are plotted vs. time, and structures can be allocated by reference to the corresponding CT image. Intravenous bolus passage in the larger vessels, and enhancement in the organs was determined in patients. Modulations that resulted from breathing posed problems, but those that resulted from pulsation may yield useful additional information. Possible clinical applications are discussed.