Yes, THERMOGRAPHY is a Scrabble word!

Letter values in Scrabble US: T 1, H 4, E 1, R 1, M 3, O 1, G 2, R 1, A 1, P 3, H 4, Y 4.

Is it a valid word?

THERMOGRAPHY is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

diagnostic technique using a thermograph to record the heat produced by different parts of the body; used to study blood flow and to detect tumors