+ int16_t nmask = (int16_t)0x8000;
+ nmask = nmask >> ( BitsAllocated - BitsStored - 1 );
+/*
+std::cout << "BitsStored " << BitsStored
+ << " BitsAllocated " << BitsAllocated
+ << std::endl;
+std::cout << std::hex << "pmask " << pmask
+ << " smask " << smask
+ << " nmask " << nmask
+ << std::endl;
+*/