Abstract
1. The measured average: the height and width of the lung field and heart shadow among all of the boys and girls up to 15 years old are greater in values when they are compared with those of the older. The angle of the inclination of the heart increases as one grows older. The difference between the right and left lung field among boys and girls: both show greater values in height in the left, and in width in the right. The difference between sexes: girls show higher value only in height, and boys show higher values in the rest.
2. The average indexes: as one grows, both among boys and girls, heart-lung-field-height indexes become smaller; the height in the lung field become proportionately higher when they are compared with the height in the heart shadow. And heart-lung-field-width indexes, A and B, have both greater values, and width of the lung field becomes proportionately higher when it is compared with the width of the heart shadow. It may be added, that the right has greater values than left but there is little difference among the sexes.
3. Correlations: As the angle of the heart shadow becomes larger, the value of the above mentioned three indexes have an apparent correlation to the angle in the left and right and also among both bodys and girls.
The height in the heart shadow becomes proportionately greater as it is compared with the height in the lung field. Width of both middle and lower lung field become proportionately greater in values as they are compared with those of the widest and lower parts of the heart shadow.
It is clearly proven in the above mentioned study that the morphology of the lung field and heart shadow is determined by the angles of inclination of the heartand that there is a definite morphological relatioeship between the two.
