Left ventricular mass:: Manual and automatic segmentation of true FISP and FLASH cine MR images in dogs and pigs
Left ventricular mass:: Manual and automatic segmentation of true FISP and FLASH cine MR images in dogs and pigs
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DOI：
10.1148/radiol.2302020761
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发表时间：
2004-02-01
期刊：
影响因子：
19.7
通讯作者：
Finn, JP
中科院分区：
文献类型：
--
作者：
François, CJ;Fieno, DS;Finn, JP
目得：评估手动和自动分割的真快速成像与稳态进动（FISP）和快速低角度拍摄（FLASH）电影磁共振（MR）成像在左心室（LV）mass.MATERIALS和METHODS的测定的准确性：9只狗和5只猪进行了电影MR成像的整个LV从底部到心尖。记录手动和自动分割时间，并将每种方法确定的LV质量相互比较，并与尸检时的真实LV质量进行比较。估计的质量和真正的质量在尸检进行了比较，通过计算相关系数和两者之间的平均差异为每个MR序列和分割methods.Results：真正的LV质量在尸检相关性以及与真正的FISP MR图像上的手动和自动轮廓确定的群众。真实左心室质量与真实FISP和FLASH图像上手动轮廓确定的质量之间的平均差异分别为-0.8 g +/- 2.6和3.7 g +/- 6.8。当手动绘制的舒张末期轮廓自动传播到收缩末期时，真实FISP和FLASH图像的平均差异分别为2.0 g +/- 3.6（P = .05）和9.1 g +/- 6.5（P < .05）。对于自动轮廓，平均差异为10.6 g +/- 8.5（P
PURPOSE: To evaluate the accuracy of manually and automatically segmented true fast imaging with steady-state precession (FISP) and fast low-angle shot (FLASH) cine magnetic resonance (MR) imaging in the determination of left ventricular (LV) mass.MATERIALS AND METHODS: Nine dogs and five pigs underwent cine MR imaging of the entire LV from base to apex. Manual and automatic segmentation times were recorded, and LV masses determined with each were compared with each other and with the true LV mass at autopsy. Estimated mass and true mass at autopsy were compared by calculating the correlation coefficient and the mean difference between the two for each MR sequence and segmentation method.RESULTS: True LV mass at autopsy correlated well with masses determined with manual and automatic contours on true FISP MR images. Mean differences between true LV mass and masses determined from manual contours on true FISP and FLASH images were -0.8 g +/- 2.6 and 3.7 g +/- 6.8, respectively. When manually drawn end-diastolic contours were automatically propagated to end systole, mean differences were 2.0 g +/- 3.6 (P = .05) and 9.1 g +/- 6.5 (P < .05) for true FISP and FLASH images, respectively. For automatic contours, mean differences were 10.6 g +/- 8.5 (P