Abstract #4656

The Signal Intensity of Anterior and Posterior Lobe of Pituitary and Thyroid Gland in Preterm and Term Infants

Sayo Otani¹, Yasutaka Fushimi¹, Satoshi Nakajima¹, Yusuke Yokota¹, Sonoko Oshima¹, Azusa Sakurama¹, Krishna Pandu Wicaksono¹, Tomohisa Okada², and Kaori Togashi¹

¹Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan, ²Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan

We have evaluated the signal and the volume of anterior pituitary, posterior pituitary and thyroid gland in preterm and term infants on MRI by using 3D T1-PETRA sequence. Our study showed that the intensity of anterior pituitary was positively correlated with gestational age (GA), negatively correlated with chronological age (CA). We showed the intensity of posterior pituitary was also positively correlated with GA, negatively correlated with CA. We also demonstrated that the intensity of thyroid was positively correlated with GA, negatively correlated with CA. Our results may have relation to the maturity of hypothalamic-pituitary-thyroid (HPT) axis.

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