thymic thoracic ratio TT‐ratio was defined as the quotient of the anteroposterior thymic to the intrathoracic mediastinal diameters measured in the three vessels and trachea view. This ratio was measured in a prospective cross‐sectional study of 302 normal healthy fetuses between 15 and 39 weeks' gestation.J 2020. 5. 2. 이전 1 다음
