Abstract
This study covers pulmonary hypertension known as refractory disease. Currently, pulmonary artery occlusion is calculated by measuring blood flow velocity and blood pressure using an invasive catheter and measuring the phase difference between them, but recently, non-invasive diagnosis has become desirable. In our previous study, we proposed a non-invasive diagnostic method that measures the vessel outer diameter instead of blood pressure using an ultrasound system. However, in experiments using clinical data, an unacceptable phase angle difference exists between the vessel outer diameter and blood flow velocity. The measurement of blood flow velocity is highly reproducible, while the measurement of vessel outer diameter is less reproducible. Since the pulmonary artery is located close to the heart, the center position of the artery changes due to pulsation. Therefore, in this study, it is necessary to eliminate that oscillating waveform component from the arterial diameter measurement waveform. Therefore, a program to calculate the arterial diameter considering the oscillation will be created and its practicality will be examined.
