PROBLEM TO BE SOLVED: To provide an improvement technology related to the measurement of a blood vessel diameter and a blood flow rate by an ultrasonic wave.SOLUTION: A blood vessel wall specification part 60 specifies a position of a blood vessel wall of a blood vessel based on image information acquired from a blood vessel diameter measurement line passing through a measurement region of the blood vessel in an ultrasonic image. A blood vessel diameter measurement part 62 measures a blood vessel diameter of the blood vessel based on the position of the blood vessel wall. A blood flow rate measurement part 64 measures a blood flow rate in the blood vessel based on Doppler information acquired from at least one Doppler measurement line including a reference Doppler measurement line passing through a reference position in the measurement region of a plurality of Doppler measurement lines having an intersectional relationship with the blood vessel diameter measurement line.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】超音波による血管径と血流速の計測に係る改良技術を提供する。【解決手段】血管壁特定部60は、超音波画像内の血管の計測部位を通る血管径計測ラインから得られる画像情報に基づいて、血管の血管壁の位置を特定する。血管径計測部62は、血管壁の位置に基づいて血管の血管径を計測する。血流速計測部64は、血管径計測ラインと交差関係にある複数のドプラ計測ラインのうち、計測部位内の基準位置を通る基準ドプラ計測ラインを含む少なくとも1つのドプラ計測ラインから得られるドプラ情報に基づいて、血管内の血流速を計測する。【選択図】図1
