Normal development of the spinal cord in neonates and infants seen on ultrasonography

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Abstract
The normal development of the spinal cord from the fetal period to infancy was studied by ultrasonography (US) with a 7.5 MHz transducer. Longitudinal and transverse sections of the spinal cord were clearly observed. The sagittal and transverse diameters of the spinal cord increased with age. In order to evaluate disorders of the spinal cord precisely, it is necessary to clarify the normal features as well as the normal development of the spinal canal and cord, and the surrounding structures. US with such a high frequency transducer will be the most suitable for this purpose.