/usr/include/dcmtk/dcmimage/ is in libdcmtk2-dev 3.6.0-15.
This file is owned by root:root, with mode 0o755.
..
/usr/include/dcmtk/dcmimage/diargimg.h
/usr/include/dcmtk/dcmimage/diargpxt.h
/usr/include/dcmtk/dcmimage/dicmyimg.h
/usr/include/dcmtk/dcmimage/dicmypxt.h
/usr/include/dcmtk/dcmimage/dicocpt.h
/usr/include/dcmtk/dcmimage/dicoflt.h
/usr/include/dcmtk/dcmimage/dicoimg.h
/usr/include/dcmtk/dcmimage/dicomot.h
/usr/include/dcmtk/dcmimage/dicoopx.h
/usr/include/dcmtk/dcmimage/dicoopxt.h
/usr/include/dcmtk/dcmimage/dicopx.h
/usr/include/dcmtk/dcmimage/dicopxt.h
/usr/include/dcmtk/dcmimage/dicorot.h
/usr/include/dcmtk/dcmimage/dicosct.h
/usr/include/dcmtk/dcmimage/dihsvimg.h
/usr/include/dcmtk/dcmimage/dihsvpxt.h
/usr/include/dcmtk/dcmimage/dilogger.h
/usr/include/dcmtk/dcmimage/dipalimg.h
/usr/include/dcmtk/dcmimage/dipalpxt.h
/usr/include/dcmtk/dcmimage/dipipng.h
/usr/include/dcmtk/dcmimage/dipitiff.h
/usr/include/dcmtk/dcmimage/diqtcmap.h
/usr/include/dcmtk/dcmimage/diqtctab.h
/usr/include/dcmtk/dcmimage/diqtfs.h
/usr/include/dcmtk/dcmimage/diqthash.h
/usr/include/dcmtk/dcmimage/diqthitl.h
/usr/include/dcmtk/dcmimage/diqthitm.h
/usr/include/dcmtk/dcmimage/diqtid.h
/usr/include/dcmtk/dcmimage/diqtpbox.h
/usr/include/dcmtk/dcmimage/diqtpix.h
/usr/include/dcmtk/dcmimage/diqtstab.h
/usr/include/dcmtk/dcmimage/diqttype.h
/usr/include/dcmtk/dcmimage/diquant.h
/usr/include/dcmtk/dcmimage/diregist.h
/usr/include/dcmtk/dcmimage/dirgbimg.h
/usr/include/dcmtk/dcmimage/dirgbpxt.h
/usr/include/dcmtk/dcmimage/diybrimg.h
/usr/include/dcmtk/dcmimage/diybrpxt.h
/usr/include/dcmtk/dcmimage/diyf2img.h
/usr/include/dcmtk/dcmimage/diyf2pxt.h
/usr/include/dcmtk/dcmimage/diyp2img.h
/usr/include/dcmtk/dcmimage/diyp2pxt.h