I avoid using the word "borderline" in regards to RT calls. If the code states maximum length is .750" and it's .750" it's good. If it's .751" it's bad. Somebody wants to argue it, or an owner wants to over ride it, Not my problem. It is what it is when I lay the comparators on it, I don't back off of RT calls for that reason. Someone may interpret something a different way, someone may not like my interpretation, but if there is one thing I don't trust, and don't believe anyone should trust, is an weak kneed interpreter, if they are no more sure than that, they should not be interpreting film. Make a call and stand by it. My opinion.
Regards,
Gerald