The DEXA scan can be defined as a non-invasive test, which measures the density of the bone mineral, for assessing in case the person has any fracture or suffering from osteoporosis. The word DEXA stands for Dual Energy X-Ray Absorptiometry. Such a process is carried out by aiming two x-ray beams at the specific area of the body where bone density is to be measured.
The test can detect changes as small as up to one percent. The dexa scan in London services is also sometimes referred to as a DXA scan or Densitometry scan as well. So, without further ado, let’s look at the uses and procedure of this test in detail.
The Procedure And Uses Of The DEXA Scan
Things To Know Before The Test
- The timing of the DEXA scan ranges anywhere between ten minutes to thirty minutes.
- The DEXA scan takes place in the radiology department of the medical centre or hospital.
- It’s recommended to wear clothes that have no metal in it, avoiding belt-buckles, zippers and underwired bras. Always leave your jewellery at home, as wearing metal can easily interfere with the test.
- On the day of your DEXA scan, you’ll have the privilege to eat and drink normally as you do. There are no such restrictions.
- It’s suggested that if you have medical insurance, do bring your insurance papers along with the doctor’s prescription (if any).
- In case if you recently had any CT, CAT or Radioisotope Scan, you may have to postpone your DEXA scan at least a few weeks later.
The Uses
The following are some of the main uses of the DEXA scan:
- Detecting the on-set Osteoporosis or bone fracture.
- Experience of back pain because of a spine fracture.
- Loss of height over time.
The Test Procedure
- Pre-Test Procedure – The first part of the procedure includes your check-in procedure, where your insurance papers will be checked (if you have any) and can also be required to fill-up the required forms as well. After that, you’ll be required to lie down on a padded table, under which there will be an x-ray generator while over the table will have an imaging device.
- The Actual Test Procedure – The x-ray generator will be activated with low-dose of x-ray beams with two peak energy ratings. These beams will be passed through your bones. One will be absorbed by the soft tissues while the other by your bone. The amount of radiation that has been absorbed by the soft tissues will be subtracted from the total volume to get the density of the bones. During the test, you’ll need to stand still and also hold your breath.
