ABSTRACT
Objective Three-dimensional(3D) automated ultrasonic volume measurement is becoming favorable in clinical application and turns to be an important direction .The article was to evaluate the consistency of two-dimensional (2D) and three-di-mensional ultrasonography in the diameter measurement of single follicle . Methods 438 single folliculars were respectively meas-ured by the same sonographer in 2D and 3D ultrasonic measurement.2D diameter, 3D mean diameter and 3D virtual ball diameter of every single follicle were recorded , and Bland-Altman method were used to evaluate the consistency of the results by these two meth-ods. Results In the consistency analysis on the diameter measurement of single follicle by 2D and 3D mean diameter measurment methods, d equaled -1.06 mm, and 95% LoA range covered the range of -4.82 mm to 2.70 mm.95% CI of 95% LoA range,-5.21 mm to 3.08 mm, was beyond the settings of clinical acceptable error limit range , -3.56 mm to 1.44 mm, showing poor consis-tency.Likewise, in the research of the consistency in the measurement of 2D diameter and 3D virtual ball diameter in the diameter measurement of single follicle , d equaled -0.07 mm , and 95%LoA range covered the range of -3.11 mm to 2.98 mm.95%CI of 95%LoA range, -3.43 mm to 3.29 mm, was beyond the settings of clinical acceptable error limit range , -2.57 mm to 2.43 mm, showing poor consistency . Conclusion 2D and 3D ultrasound measurements in the diameter measurement of single follicle are not consistent.However, considering the objectivity and accuracy of the results , 3D ultrasonography still has an advantage over 2D ultra-sonography , which can provide more acurate aid for assisted reproductive technology .