ABSTRACT
Although sonography has recently become established as an essential method for the assessment of pregnancy, at the beginnings of its diagnostic application more than half a century ago, one-dimensional (1D) sonography failed to become an important diagnostic modality for the detection of brain tumors. 1 , 2 Despite this diagnostic fiasco, the investigations using sonography enabled its clinical application in obstetrics in the late 1950s, while at the same time midline encephalography became the standard diagnostic modality for the evaluation of patients with traumatic brain injuries. 1 , 2 The introduction of Doppler, real-time, and grayscale sonography into clinical practice in the 1970s was of substantial signif-icance. 1 , 2 During the 1980s, the clinical application of Doppler sonography in blood flow studies was developed. 1 , 2 When performing 2D imaging, sonographers were making 3D reconstructions in their imagination, and the development of computer technology finally enabled 3D reconstruction from ultrasonic tomograms.3,4 The normal fetal head was the first object of interest in obstetric sonography, which enabled the first prenatal diagnosis of fetal brain pathology as well. 5 – 9
