Evaluation of the Fourth Ventricular Size in Neonate : Using the Mid-Sagittal Image in Brain US & MRI

Kim, Jee Hyun; Kim, Dae Soon; Shu, Hong Kil; Cho, Sin Young; Lee, Eil Seong; Whang, Dae Hyun; Kim, Dug Ha; Kang, Ik Won

Journal of Korean Society of Medical Ultrasound 1996;15(2): 325-329.

Jee Hyun Kim, Dae Soon Kim, Hong Kil Shu, Sin Young Cho, Eil Seong Lee, Dae Hyun Whang, Dug Ha Kim, Ik Won Kang

Department of Diagnostic Radiology, and Pediatrics1 Hallym University College of Medicine

ABSTRACT

PURPOSE : To clarify the accurate size and anatomic relation of the fourth ventricle in brain US of neonates.MATERIAL & METHODS : We prospectively studied 40 neonates without congenital anomaly and birth trauma, using US,measured the AP diameter of the fourth ventricle in mid-sagittal image and compared with mid-sagittal MR image in10 neonates. RESULTS : The mean AP diameter of the fourth ventricle in US and MRI were 4.79 ± 1.05 mm and 5.5 ±0.94 mm, respectively. Dorsal portion of pons was more echogenic regardless of low echogenicity of both fourthventricle and pons, therefore it was possible for us to discriminate the size and extent of the fourth ventriclefrom the pons. CONCLUSION : Using high resolution US, we can evaluate accurate size and extent of the fourthventricle through the different echogenicity between the fourth ventricle and dorsal portion of the pons.

Keywords: Brain US, Brain MRI, Infants, newborn, CNS