Hi Mariame, i am not so sure if Hamad already have this 4D ultrasound, but as for me i went to this clinic for my 4d ultrasound and it is really perfect, and the good thing your husband can go with you and see the baby too... if you want to try here is the clinic:
Dr Mariam Al Mahmied Clinic
Tel No. 4582020

It is near Qatar Decoration Roundabout, i just go last year as i delivered only last December and they are charging 400 riyals.

Hope it will help