| SAN | sinoatrial node; sinoauricular node; slept all night; solitary autonomous nodule |
|---|---|
| tin | three times a night [Lat. ter in nocte] |
| XN | night blindness |
| a.t. | acquisition time; 영상회복시간 = TR x N x Nex TR; Time to Repeat &... |
| ART | absolute retention time; Accredited Record Technician; acoustic reflex test; algebraic reconstructio... |