Matching up Images in the Time Series

Hello, I am wondering if anyone knows if the 1st image of the set of 30 images would correspond to the 1st image of the set of 30 images from another short axis view.. i.e. if we look in sax_5 we have 30 images, and in sax_7 we have 30 images, does the nth image in sax_5 capture the same time (just different position) in the cardiac cycle as the nth image in the sax_7 folder? Does it also correspond to the nth image in the long-axis views? Also, does anyone know the metric of each pixel? I.e. how many millimeters each pixel of these files represents? Many thanks in advance.


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