Medical radiation is a concern
Osteoporosis is a common bone disease, especially in the elderly. According to statistics from the Hong Kong Health Bureau, about one-third of women over the age of 65 suffer from osteoporosis, and about one-fifth of men suffer from osteoporosis. The disease can make bones brittle, increase the risk of fractures, and seriously affect quality of life. Therefore, early diagnosis and treatment are particularly important.
Among the many diagnostic methods,DEXA Bone DensitometryDual-energy X-ray absorptiometry (DEXA) is considered the gold standard. This test measures the mineral density of the bones and helps doctors determine if a patient has osteoporosis. However, many patients have concerns about radiation safety because DEXA tests involve X-rays. In this article, we’ll take a closer look at the radiation doses, potential risks, and how to get tested with confidence.
DEXA Inspection Principle and Process
The principle is to use two X-rays of different energies to penetrate the bone and calculate the mineral density of the bone by measuring the degree of attenuation of the X-rays. This method is characterized by high accuracy and low radiation, making it suitable for detecting key areas such as the spine and hip joints.
Before undergoing the DEXA test, patients should pay attention to:
- Avoid wearing clothing and accessories containing metal to avoid affecting the test results.
- Calcium supplements should not be taken within 24 hours prior to testing.
- Pregnant women or women who may become pregnant should inform their doctor in advance.
The examination process is very simple, the patient only needs to lie on the examination table and the machine will slowly scan the target area from above. The entire procedure typically takes only 10-15 minutes and does not require injections or anesthesia.
Radiation dose analysis for DEXA testing
Many patients are concerned about the radiation dose of the DEXA test, but in reality, the radiation dose is much lower than the usual X-ray. Below is a comparison of radiation doses for scans in different areas:
| Verify your site | Radiation dose (microsieverts) |
|---|---|
| spine | 1-10 |
| coxa | 1-5 |
| body | 5-20 |
In contrast, we are also exposed to radiation in our daily lives, such as:
- Flying from Hong Kong to Taipei exposes you to about 40 microsieverts of radiation.
- The radiation dose ingested from food is about 300 microsieverts per year.
It can be seen that the radiation dose of the DEXA test is very low and its effects on the human body are almost negligible.
Assessing the Potential Risks and Benefits of DEXA Testing
Although the radiation dose of the DEXA test is very low, some patients are still concerned about the long-term accumulation risk. According to the International Commission on Radiological Protection (ICRP), the risk of radiation cancer in DEXA testing is about 1 in 1 million, which is much lower than other risks in daily life.
In contrast, the benefits of early diagnosis of osteoporosis are significant.
- To reduce the risk of fractures, timely drug treatment can be taken.
- Slowing down the progression of the disease through lifestyle adjustments.
- Avoid reduced quality of life due to fractures.
Additionally, alternatives such as ultrasound bone densitometry are available in the market, but their accuracy and applicability are not as good as DEXA testing. Therefore, DEXA remains the preferred testing method for high-risk individuals.
How to take a DEXA test with confidence?
To ensure the safety and accuracy of the examination, patients should choose a hospital with good facilities and specialists. Among the several private hospitals in Hong Kongdexa scan價錢At around HK$1,000-2,000, public hospitals are relatively cheap, but the waiting time is longer.
Before undergoing the examination, patients should communicate well with their doctor to understand the needs and precautions of the examination. After the examination, you do not need special care and can quickly resume your normal activities.
In conclusion, the DEXA test is a safe and accurate way to test bone density with extremely low radiation risk, far outstripping the benefits of early diagnosis. Patients do not need to worry too much and should have regular check-ups according to the doctor’s recommendations to maintain bone health.