Accuracy evaluation of cardiac models of cases with complex congenital heart disease printed by domestic 3D printers

Abstract

Objective To evaluate the accuracy of 3D models of patients with complex congenital heart disease(CHD) printed by domestic 3D printers based on cardiac CT data. Methods From April 2018 to June 2018, our hospital used domestic 3D printers to print the hearts of 50 patients with complex CHD. The median age of the patients was 24 months(1 month to 61 years), and the diseases included pulmonary atresia, right ventricular double outlet and transposition of aorta. 3 measurement sites(150 in total) were selected for each patient. Pearson correlation coefficient calculation, paired t test and Bland-Altman analysis were performed. Results Pearson correlation coefficient is 0.997.The difference of the measured value of CT-model was tested for normality. P was 0.2 of the D test. The Q-Q graph showed that the data point and the theoretical line were highly overlapped. The mean difference was(-0.07±0.67)mm, P=0.196. In Bland-Altman analysis, the consistency boundary value interval of the difference was(-1.29 mm, 1.16 mm) between which there were 143/150(95.33%) points. Conclusion 3D models of patients with complex CHD printed by domestic 3D printers based on cardiac CT data have good accuracy. Key words: 3D printing; Congenital heart disease; 3D printer

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