Are radiology reports accurate?

Depends: It depends on the quality of the study being read, the skill of the radiologist, information about the patients' condition provided to the radiologist (the history), and other factors including the type of exam that was done. No matter how good the radiologist is, there will be some reports that miss something or come to a conclusion that does not pan out. Nature of the beast.

Yes: Why wouldn't they be? What would be the point of writing the reports then? They are read by medical doctors specializing in radiology. They are a tool towards diagnosis and treatment - just like blood tests.

Yes. : Yes, as long as the radiologist has an accurate history and physical findings as well as recent lab data, and considering the exam is of optimal quality. With the exception of the quality which is able to be controlled by the radiologist, all other parameters are supplied by the referring doc. The more accurate his info, the better the radiologists interpretation.

Within the confines: of the human condition(i.e. we are imperfect creatures in an imperfect world), yes. Radiologists are no more or less accurate than other highly trained experts in their fields.

Interesting question: Like any test, no result is 100% accurate. Many issue can cause inaccuracies. In radiology, humans interpret images. We all have our good days and bad days. Misses, mistakes and transciption errors lead the list of causes of inaccuracies. This has been studied extensively. Radiologists are continually trying to improve and reduce errors.