| ROC | ROC - Receiver operating characteristic - In statistics, a receiver operating characteristic (ROC), or ROC curve, is a graphical plot that illustrates the performance of a binary classifier system as its discrimination threshold is varied. The curve is created by plotting the true positive rate against the false positive rate at various threshold settings. | |
| RVOT | RVOT - Right ventricular outflow tract - (i) The right ventricular outflow tract (RVOT) is an infundibular extension of the ventricular cavity which connects to the pulmonary artery. (ii) The RVOT is an important anatomical feature in many corrective surgeries for congenital heart defects and dilation of the RVOT can cause pulmonary valve insufficiency. | |
| RD | RD - Retinal detachment - Retinal detachment is a disorder of the eye in which the retina peels away from its underlying layer of support tissue. Initial detachment may be localized or broad, but without rapid treatment the entire retina may detach, leading to vision loss and blindness. | |
| RM3 | RM3 - Renal Preservation System - Perfusion Device for Pulsatile Kidney Preservation. | |
| RFA | RFA - Radiofrequency ablation - (RFA) is a medical procedure in which part of the electrical conduction system of the heart, tumor or other dysfunctional tissue is ablated using the heat generated from high frequency alternating current (in the range of 350–500 kHz). | |