The Collaborative International Dictionary of English v.0.48:

radiograph \ra"di*o*graph\ (r[=a]"d[i^]*[-o]*gr[a^]f), v. t.
   To make a radiograph of. -- ra`di*og"ra*pher
   (r[=a]`d[i^]*[o^]g"r[.a]*f[~e]r), n.
   [Webster 1913 Suppl.]