Visualization of the standardization assessment according to examinations, study periods, and hypotheses. Here exemplified by the rotational transducer position of ALAX view recordings. The distribution of DL algorithm scores is shown along the x-axis, while the distribution of the expert’s manual scores is shown along the y-axis. The colour-coded left panel indicates operators, periods, whether the DL guidance algorithm was used or not, and relation to the four null hypotheses. The reference interval from the cardiologists’ distribution is shown by the dotted line interval. E, examination; H₀A-D, null hypotheses tested; P, period.