Yes, SONOGRAM is a Scrabble word!

Letter values in Scrabble US: S 1, O 1, N 1, O 1, G 2, R 1, A 1, M 3.

Is it a valid word?

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

an image of a structure that is produced by ultrasonography (reflections of high-frequency sound waves); used to observe fetal growth or to study bodily organs