What is densitometry?
Densitometry is a non-invasive method for determiningbone mineral density, used mainly to prevent osteoporosis at an early stage. This study makes it possible to conduct therapy on time and not to bring the disease to severe stages. Let's see a little more in detail, what is densitometry and how it is conducted.
Types of densitometry
Densitometry is carried out by four methods:
- Quantitative ultrasonic densitometry.
- Dual-energy X-ray absorptiometry.
- Quantitative magnetic resonance imaging.
- Quantitative computed tomography.
How is densitometry done?
Before the procedure:
- One day before the study, you can not take calcium in the composition of vitamins and supplements.
- If the patient has previously been examined withthe use of barium or other contrast media, as well as other types of x-ray studies or computed tomography, it is necessary to notify the doctor about this.
- In the event that a woman is examined and there is even a minimal possibility of pregnancy, it is necessary to inform the doctor about this.
The procedure takes 10-30 minutes, the patientmust take a certain position (depending on the part of the body being examined) and stay in it motionless (this is very important!). The doctor conducting the study takes a special sensor and moves it over the necessary area, while the image is projected onto the computer screen.
How to evaluate the result?
Conclusion after the survey givesRadiologist, attention is drawn to two indicators - T-score and Z-score. The T score indicates the result of comparing the patient's bone density with some average reference value. The normal value is 1 point or more. At a T-score of -1 to -2.5, osteopenia is diagnosed, and at an index of less than -2.5, osteoporosis is diagnosed. Z-score shows the result of comparing bone density with the average age-group index. If the Z-score has an abnormal value (very low or very high), the patient is assigned additional studies.
Find more meanings of medical terms in the section Medical terms.
