| BTFS | breast tumor frozen section |
|---|---|
| BTSG | Brain Tumor Study Group |
| CBT | carotid body tumor; cognitive behavioral treatment/therapy; computed body tomography |
| CTR | cardiothoracic ratio; carpal tunnel release; central tumor registry |
| DDT | dichlorodiphenyltrichloroethane; ductus deferens tumor |
well-type ionization chamber (우물형 전리함