Bone Health Assessment
Bone scan assessments
We use the CUBA clinical ultrasound machine. Ultrasound waves are passed through the heel bone and the amount of ultrasound that reaches the detector on the other side of the heel is measured. The quantity of the ultrasound absorbed by the bone depends on the complexity of structure of the bone and also its mineral content. Quantitative Ultrasound Sonometry is therefore a good predictor of fracture. The machine does not use X-ray radiation.
The heel-bone is used for this test because the bone at the heel is similar in structure to that at the hip. It is not possible to perform this test at the hip because it is covered by too much fat and muscle. Also, the heel is a weight-bearing bone so that it reflects the health of other, similar, bones and it is readily accessible.
What will happen during the scan?
You will need to remove your shoes and socks, or tights, but no other clothing or jewellery. You remain in a sitting position with one foot at a time in the CUBA clinical machine. Your leg will be lightly strapped to a support to steady it. Ultrasound gel is applied to your heel to ensure no air is trapped between your foot and the ultrasound transmitter, which could affect the result. Normally two readings are performed as a double check.
We will discuss the result with you at the end of the procedure. You will be told how your result compares to the average for your age and also the relative condition of your bones compared to the average 20 year old; this is universally used as an indicator of risk of fracture. We will also be able to discuss dietary and lifestyle factors that could improve your bone strength.
Bone-scan appointments last around 15 - 20 minutes.
