COMPARISON BETWEEN ULTRASONIC MANUAL AND
WAVELET BASED AUTOMATIC MEASUREMENTS
OF FOETAL BIOMETRY
Uttam Dattatrye Tapi1, Aarti Sharma2 1SGSITS, 23, Park Road, Indore, MP, 452 003 INDIA 2Acropolis Institute of Technology and Research
Bypass Road, Manglia Square, Indore, M.P. 453 771, INDIA
Abstract. In this article our objective is to verify the automatic and manual measurement of biparietal diameter and femur in foetal age prediction in the second and third trimester of pregnancy. The study consisted of 72 pregnant Indian women and manual measurement of fetal biometry was carried out by experienced sonographers. The automatic wavelet based measurement method of fetal biometry had already discussed in our previous paper. We verify that the difference between gestational age obtained for FL (femur length) and BPD (biparietal diameter) parameters via automatic wavelet based contour extraction and manual measurement is very close to each other.
The following findings are also revealed:
Linearity throughout pregnancy using the femur length measurements (both auto and manual) while that of the biparietal diameter demonstrated poor correlation after 30 weeks of gestation.
The standard error for auto femur length estimate was 0.2845 as against 0.2998 for auto BPD. The standard error for manual femur length estimate was 0.2251 as against 0.3009 for manual BPD.