All of the following instructions related to investigation of a patient who has to undergo bone densitometry are correct EXCEPT
1
Calcium supplements should be avoided 24 hours prior to the investigation
2
Patient must remain nil per orally at least 12 hours before the investigation
3
Patient has to remove clothing, jewellery and other metallic objects when scanning is done
4
Patient to lie still with hips flexed for about 20 minutes during test