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Systems, methods and apparatus for determining a fractional flow reserve (FFR) based on the minimum lumen area (MLA) and the constant
Systems, methods and apparatus for determining a fractional flow reserve (FFR) based on the minimum lumen area (MLA) and the constant
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机译:用于基于最小管腔面积(MLA)和常数确定分数流量储备(FFR)的系统,方法和设备
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摘要
In one aspect, the invention relates to system comprising: a processor configured to receive a first optical coherence tomography (OCT) data set obtained during a pullback of a data collection probe along a first length of a first blood vessel; determine a minimum lumen area disposed along the first length using the first OCT data set; and determine a first FFR value along the first length based on the minimum lumen area. In one embodiment, the first FFR value is an estimated FFR. In another aspect, the invention relates to a method that includes measuring, using OCT, the area of a lumen of a vessel for which the vessel's FFR is to be determined; and calculating, using a computer, A2m/(A2m+k) or YA2min/(YA2min+k) as a FFR value. In one embodiment, k is about 0.7 mm2 and γ is patient-specific variable that depends on the coronary branch in which the images were obtained.
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机译:在一个方面,本发明涉及一种系统,包括:处理器,被配置为接收在沿第一血管的第一长度拉回数据收集探针期间获得的第一光学相干断层扫描(OCT)数据集;使用第一OCT数据集确定沿第一长度布置的最小管腔面积;并基于最小管腔面积沿第一长度确定第一FFR值。在一个实施例中,第一FFR值是估计的FFR。在另一方面,本发明涉及一种方法,该方法包括:使用OCT测量要确定其FFR的血管内腔的面积;并使用计算机计算A 2 Sup> m /(A 2 Sup> m + k)或Y A2 Sup> min /(Y A2 Sup> min + k)作为FFR值。在一个实施例中,k约为0.7mm 2,并且γ是患者特异性变量,其取决于在其中获得图像的冠状动脉分支。
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