| U/2 | upper half |
|---|---|
| UH | umbilical hernia; uncontrolled hemorrhage; unfavorable histology; upper half |
| VHF | very high frequency; viral hemorrhagic fever; visual half-field |
| 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... |