What is the ruling on a pregnant woman drinking water before the dawn (Fajr) adhan for a CT scan in Ramadan?

Intentionally drinking during the day in Ramadan invalidates the fast and necessitates making up the day, by scholarly consensus. Drinking is not permissible except out of dire necessity. If it is possible to postpone the X-ray until after iftar or after Ramadan without harm to you or the fetus, then drinking is not permissible. However, if the X-ray is necessary and cannot be postponed, and there is a fear of harm to you or the fetus, then there is no blame in breaking the fast due to necessity. In this case, it is obligatory to refrain from eating and drinking after drinking the necessary amount, and to make up that day, according to the majority of scholars.