Welcome to Dev Chakraborty's FROC web site
FROC is an abbreviation for Free-response Receiver Operating Characteristic. FROC analysis is used to objectively evaluate imaging systems or radiologists. It is intended to answer questions like which is the better imaging system for detecting breast cancer? How good is the radiologist at detecting cancer? In the free-response paradigm the radiologist marks and rates suspicious locations on images. The rating is the confidence level that the marked region is malignant. The free-response paradigm closely parallels tasks such as finding lesions in mammograms or nodules in lung cancer screening. FROC analysis enables more precise evaluation of imaging systems (greater statistical power) than when location is ignored. Recent progress in this field has resulted from a connection made between this paradigm and the Kundel-Nodine model of human perception, which led to the Chakraborty search model for the free-response paradigm.
Images courtesy of Dr. Claudia Mello-Thoms