Frequently Asked Questions

The following are some of the most commonly asked questions

Are there any pre-scan instructions I should follow?

A list of pre-scan instructions can be found here

How will the scan be conducted?

The technician will measure your height and weight and then assist with positioning you on the DEXA scanning table.
A strap is placed loosely around your feet to keep them still.
You are required to lie still for 5-7 minutes while the examination takes place, during which time a scanning arm will pass above you.
The scan is done on an open bed and is not a claustrophobic environment like an MRI or CT scan.
The technician is in the room with you at all times.

What level of ionising radiation (X-rays) will I be exposed to during a DEXA scan?

You will be exposed to a very small dose, equivalent to about one day’s normal background radiation.

How long does a scan take?

Approximately 7 minutes.

What should I wear?

Wear a single layer of light clothing without any metal (zips or buttons or wired bras).
Gym clothes (shorts & t-shirt) are usually perfect.
Remove any piercings, if possible.

When should I eat?

Do not eat for 4 hours before your scan.
If your appointment is early morning - fast from 11pm the night before (Do not consume breakfast).

Is there an age limit?

Yes, clients must be at least 20 years of age.

What about exercise?

Do not take part in organised training or an exercise session of more than 20 minutes in the 12 hours before your scan.

How much water should I drink?

Be well hydrated during the 2 days before your scan.
Drink 500ml of water 1 hour before your scan.
Empty your bladder 10 minutes before your scan and defecate if required.

Should I have a scan if I’m pregnant?

You cannot have a scan if you are pregnant or if you are at risk of being pregnant.
The 10-day rule will be applied ie. you may only be scanned within 10 days of the first day of your last period.

Is there a maximum weight limit?

Yes, our DEXA scanner has a maximum weightlimit of 149kg.

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