A subset of radiomics features texture alterations of the left ventricular myocardium was associated with the severity of coronary artery calcification estimated by the Agatston score. The vertical line in the boxplot shows the location of the median. The width of the box thus shows the interquartile range (IQR) for the data. 25th quantile) and right edge at the third quartile (i.e. The box has a left edge at the first quartile (i.e.
When including the additional Agatston 1–99 groups as a validation, a severity-associated change in feature intensity was detected. The outlier boxplot is constructed by using the quartiles of the variable. Through random forest feature selection, a set of four higher-order features could be defined to discriminate myocardial texture between the two groups. Patients were divided into two subgroups depending on the severity of coronary artery calcification (Agatston score 0 and Agatston score ≥ 100). Thirty patients (26.7% women, median age 58 years) were enrolled in the study. The box portion of the diagram below illustrates. Quartiles are a method of splitting numeric values into four equal groups based on five key values: minimum, first quartile, median, third quartile, and maximum. Random forest feature selection was performed. Box plots allow you to visualize and compare the distribution and central tendency of numeric values through their quartiles. The interpretation of the compactness or spread of the data also applies to each of the 4 sections of the box plot. If the box plot is relatively tall, then the data is spread out. The wait is over Registration for Discovery Americas is open for in-person and online options. Read blog posts, and download and share JMP add-ins, scripts and sample data. IF the box plot is relatively short, then the data is more compact. Start or join a conversation to solve a problem or share tips and tricks with other JMP users. The mean and standard deviation with the Pearson correlation coefficient for correlations of features were calculated and visualized as boxplots and heatmaps. How to interpret a box plot A box plot gives us a basic idea of the distribution of the data. In this retrospective, single-center, IRB-approved study, left ventricular myocardium was segmented and radiomics features were extracted using pyradiomics. Due to higher spatial resolution and signal-to-noise ratio, new CT technologies such as PCCT may improve the detection of texture alterations depending on the severity of coronary artery calcification. The severity of coronary artery calcification may influence the myocardial texture. The coronary artery calcium score is an independent risk factor of the development of adverse cardiac events.