std::string patPrevName = "", patPrevID = "";
std::string studPrevInstanceUID = "", studPrevID = "";
std::string serPrevInstanceUID = "", serPrevID = "";
std::string patPrevName = "", patPrevID = "";
std::string studPrevInstanceUID = "", studPrevID = "";
std::string serPrevInstanceUID = "", serPrevID = "";