(EN) The invention relates to a blood flow determination apparatus (5) comprising a speckle density determination unit (7) for determining a speckle density value being indicative of a level of a speckle density in an ultrasound image of an inner lumen of a blood vessel, which has been generated at an imaging location being behind an introduction location at which a fluid has been introduced into the blood vessel (20) with a known volumetric fluid flow rate. A blood flow rate determination unit (8) determines a blood flow value being indicative of a volumetric blood flow rate based on the determined speckle density value and the volumetric fluid flow rate. This allows determining the intravascular blood flow with an improved accuracy.
(ZH) 本发明涉及一种血流确定装置(5)，包括：斑点密度确定单元(7)，其用于确定斑点密度值，所述斑点密度值指示血管的内腔的超声图像中的斑点密度的水平，所述超声图像是在成像位置处生成的，所述成像位置在引入位置后面，在所述引入位置处，已经以已知的流体体积流速将流体引入所述血管(20)；血液流速确定单元(8)，其基于所确定的斑点密度值和所述流体体积流速来确定指示血液体积流速的血流值。这允许以提高的准确度确定血管内血流。
