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Figure 4 Comparisons of myocardial contrast intensity (CI) and calibrated CI among myocardial segments in normal subjects, as well as kinetic and akinetic segments in patients with myocardial infarction (MI). Data points indicate all values of myocardial CI (left) and calibrated CI (right). Rectangles and vertical lines indicate the mean value ± SD. Myocardial CI at the akinetic segments was significantly lower than that at the normal and kinetic segments, although it was almost the same at normal and kinetic segments. However, there was a large overlap of data ranges between kinetic and akinetic segments. On the other hand, calibrated CI at the akinetic segments was also significantly lower than that at the other segments. Here, it should be noted that the overlap was obviously small compared with that in plain myocardial CI. It is expected that they will be easily distinguished after the calibration.
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