Errors in Radiology

How often we have seen that showing a same chest xray or mammogram to two different radiologists will get us different results. Do they get counted as errors? Often somebody labels the bronchovascular markings as prominent while other will call it normal. Even PNS xrays sometimes, one radiologist will call sinus hazy and other will call it clear. Looking back at the medical college days where each report was double or triple read, junior resident-then registrar then-faculty. Probably makes some sense to have some kind of standard double reads in the process to increase accuracy and to cut down on ambiguity.  It is also often postulated that computer may play a significant role in future in pattern recognition and radiologists will superread the studies, this will increase the efficiency and reduce errors of missing a significant pathology.

What do you think of this? How you ever tried reporting same xray on two different days and found yourself writing different reports? Comments and suggestions are welcome.