71 - Comparison of 2D and 3D Liver and Kidney Measurements for Anatomic Education

Poster Board Number: 71
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Abstract Body : Introduction: The three-dimensional virtual model has been used in anatomy education in many healthcare-related schools, with an emphasis on their anatomical morphology and anatomical orientation. In this study, we used 2D and 3D measurements to determine the length and angle of 3D structures and how far they are from the abdominal aorta. Method and materials: 3D virtual models of liver, kidney, abdominal aorta and common iliac arteries were created from computed tomographic angiography (CTA) using Amira software. These models were developed using the area segmentation method and each model was measured using 2D length, 3D length, 2D angle, 3D angle measurement tools. Results: In the length measurement of liver, three levels (horizontal, vertical and oblique) of the measurements, 2D length in levels 1 (horizontal) and level 3(oblique) is higher than the 3D length; 2D and 3D length in level 2 (vertical) are similar. In three angle measurements of liver, Angle 1(right) 2D and 3D measurements are almost equal; angle 2 (inferior) 2D is larger than 3D; angle 3 (left) 3D is larger than the 2D. In the kidney length measurement, three levels (outer, middle and inner) of 2D measurement of the left and right kidney are greater than the 3D measurement. In the measurement of the angle of curvature of the kidney, the angle of curvature 3D is equal to or slightly superior to the angle of curvature 2D. In the distance measurement, the superior region of the liver is closer to the abdominal aorta in the 2D measurement. In the middle and inferior region of the liver, the 3D measurement is longer than the 2D measurement. The superior and middle regions of the left kidney are closer to the abdominal aorta than the right kidney; the measurement of the inferior region in both kidneys 2D is similar to 3D. Conclusion: The 2D length measurement is usually larger than the 3D measurement; the 3D angel curvature measurement is equal to or greater than the 2D. The 2D measurement only measures the surface length and angle of structures on the flat screen. The 3D measurement can measure the actual length and angle of the structures at the three-dimensional level, and the measurement numbers are stable and can be rotated with the structures. Significance: 3D measurement is more precise and stable, which is more useful in clinical and anatomical applications and education. 3D measurement is more useful and sophisticated than 2D measurement for measuring virtual 3-dimensional structures and their deep lengths, curvature angles.