How Do I Interpret My Bone Density Scan Results?

Bone density meter is a medical detection instrument that measures human bone minerals and obtains various related data. The results of bone density meter test are mainly based on T value, including Z value, bone density, bone mass and other data. The result of the X-ray test is more accurate. It is the gold standard for bone density adopted by the International Health Organization (WHO). The mainstream bone densitometers on the market in the early 21st century are divided into dual-energy X-ray bone density meters and ultrasonic bone density meters. In addition, although there are X-ray bone densitometers, but not dual energy technology, there are also single photon bone density meters. This article mainly introduces two major types of bone density meters on the market.

Bone density meter is a medical detection instrument that measures human bone minerals and obtains various related data. The results of bone density meter test are mainly based on T value, including Z value, bone density, bone mass and other data. The result of the X-ray test is more accurate. It is the gold standard for bone density adopted by the International Health Organization (WHO). The mainstream bone densitometers on the market in the early 21st century are divided into dual energy X-ray bone density meters and ultrasonic bone density meters In addition, although there are X-ray bone densitometers, but not dual energy technology, there are also single photon bone density meters. This article mainly introduces two major types of bone density meters on the market.
Chinese name
Bone densitometer
Full name
"Bone Mineral Density"
Explanation
Bone density is an important sign of bone mass
Forecast
Important evidence for fracture risk

Definition of bone mineral density

Bone density, the full name is "skeletal mineral density." Bone mineral density is an important indicator of bone mass, reflects the degree of osteoporosis, and is an important basis for predicting the risk of fractures. [1] substance

Bone Densitometer Classification

1. The dual-energy X-ray bone densitometer obtains two kinds of energy, namely low-energy and high-energy photon peaks, through a certain device through an X-ray tube. After the photon peak penetrates the body, the scanning system sends the received signal to a computer for data processing to obtain the bone mineral content. The instrument can measure bone mass in any part of the body with high accuracy and less harm to the human body. The radiation dose for detecting a part is equal to 1/30 of a chest radiograph and 1% of QCT. There is no problem of radioactive source decay, which has been gradually developed in major cities in China, and the prospects are promising.
The measured data are accurate and provide a basis for patient treatment as a diagnostic result at home and abroad. Among them, the scanning methods are different and the testing time is different. The pen-beam scanning method is slower and the cone scanning method is faster. The testing time is generally between A part can range from seconds to minutes. A few seconds to a part

Types and Development of Bone Densitometers

M280153 series:
X-ray Photo densitometry
QCT, Quantitative Computed Tomography
SPA, Single Photon Absorptiometry
DPA, Dual Photon Absorptiometry
SEXA, Single Energy X-ray Absorptiometry
DEXA, Dual Energy X-ray Absorptiometry
QUS, Quantitative Ultrasound Bone Densitometry
SPT, Storage Phosphor Technology X-Ray Bone Density Analyzer

Bone densitometer measurement parameters

T value: The value obtained by comparing the measured value with the bone peak of a normal young person
Diagnose osteoporosis; predict fracture risk; monitor efficacy
Z value: the value obtained by comparing the measured value with a population of the same age
Determining the extent of osteoporosis; juvenile growth assessment

TWHO Bone Densitometer T Value Accuracy (WHO Standard)

Normal: T-value: 1SD or above
Bone loss: T-value: 1 ~ -2.5 SD
Osteoporosis: T-value: -2.5 SD or less
Severe osteoporosis: T-value: -2.5 SD or less

Bone density meter prone to fracture sites

vertebral
hip joint
Femoral neck

AKDX-09W Bone Density Meter AKDX-09W Features

Product technical characteristics
Bone mineral density examination is an inspection item that the people need, but it has not been popular for many years because the product is not ideal. The ideal product has both good clinical value and low inspection cost. Our products take into account two aspects:
1. Dual-energy X-ray technology is a classic technique for bone density measurement and is called the "gold standard". This product uses this technology to ensure the accuracy, repeatability and rationality of the measurement, and it is easy to be accepted by the medical field.
2. The peripheral type bone density meter has lower cost than the whole body type bone density meter, is convenient for inspection, and has low inspection cost. More suitable for the majority of small and medium-sized medical care units.
3. The X-ray dose used in this product is very low, only 0.3-0.5 mA. It also adopts perfect shielding measures, which is safer than similar products and easier to be accepted by the masses and doctors.
4. This product uses X-ray fan beam scanning to collect data in a timely manner. The scan can be completed within 5 seconds, and a case can be completed in about one minute. This greatly reflects the value of the equipment, saves time and reduces costs. Make the economic value of the hospital continue to increase.
5. Due to the good safety of this product, the product can be operated in close range, and it is not necessary to separate the inspection room and the operation room. More easily accepted by hospitals.
6, the product is reasonable in mechanical and electrical design, well-made, low failure rate, easy maintenance. It also saves costs for user units.
7. As far as possible in the inspection process, simple, practical and easy to operate are considered. For example, "position" has been given more consideration and design than similar products. Even if the patient is convenient, the examination is accurate.
8. The product console adopts microcomputer control, a universal WINDOWS operating platform, a simple and clear Chinese window operation interface, and is equipped with complete operation instructions. Provides convenience for users and reduces training costs.
9. In the control software, various operations are also thoughtfully and carefully considered: try to be as complete as possible, easy to operate, and easy to learn and use: for example, in the area of interest extraction, automatic, semi-automatic, manual A variety of methods, not only ensure the speed of examination of most patients, but also ensure the special requirements of a small number of patients.
10. In terms of data processing and archival preservation, this product has also made perfect considerations. The collected images are saved in a universal DICOM format, which is convenient for communication and unified management of the hospital.
11. This product can be integrated into the M-HIS system for the terminal, upload the test results to the data server, and combine advanced cloud storage technology to facilitate medical personnel and subjects to check on the personal PC host, breaking the traditional operating mode, and the overall process Paper-based, convenient, fast, accurate and detailed.
12, the inspection results are made into a colorful graphic diagnosis report page, the results and diagnosis at a glance.
13. Images and diagnostic report data are stored in a unified database to ensure data security. You can easily query and statistics through the form.

AKDX-09W Parameters of Bone Density Meter AKDX-09W

Measurement technology:
Dual energy X-ray absorption quantitative analysis
X light source:
High Frequency High Voltage, Fan Beam Collimator
X-ray detector:
Linear dual-energy X-ray detector
Measurement site:
Distal forearm
measure time:
<5 seconds (forearm)
Computer operating system:
Windows XP
Operation interface:
Chinese
Exposure conditions:
70KV / 0.4mA
Scan time:
<5 seconds
Measurement accuracy:
The error is less than 1%
Repeat accuracy:
The error is less than 1%
QC:
Forearm quality control phantom
Normal value source:
Local census young bone peak

DR Bone Densitometer Digital DR Imaging Technology

Digital DR Technology: Digital Imaging
Replaces indirect energy conversion, semi-digital
Replaces traditional pulsed, voltage switching
Replace traditional fan-shaped, cone beam
Automated detector
Direct digitization: x-ray electrical signal
Dual Energy Sensitivity
Efficient, 99%
Crystal Scintillation Detector
2 conversions
X-line lightphotomultiplier-electric signal
Single energy sensitive
Photoelectric loss, low efficiency

Bone mineral density knowledge of children with bone density

At present, the international medical community has reached a consensus that osteoporosis is a childhood disease, that is, childhood (0-20 years old) can not accumulate sufficient bone mass due to various reasons, leading to bone mass due to bone loss in adulthood. Or bone strength is lower than a certain level, it is fragile and easy to fold.
Therefore, the most effective way to prevent osteoporosis is to maintain a normal level of bone density during childhood and achieve sufficient bone mass accumulation.
T-Score is not suitable for interpreting the results of bone density measurements in children (children's data cannot be compared with bone mass in adulthood)
Correct interpretation of children's bone density measurement results should use Z-Score
Children are growing up, and bone disease often occurs in the cortical bone, so the effective detection site should be the forearm (proximal 1/3 of the forearm) or the whole body.
In recent years, the new ultrasonic bone density measurement method has been widely used in pediatric clinics due to its non-invasive, painless, and radiation-free properties. It can continuously and densely monitor children's bone density in a short time. To ensure the normal development of children's bone mineral density.
Children's bone mineral density assessment is a complex professional problem that integrates multiple disciplines:
From the perspective of bone mineral accumulation, bone growth and development, and balanced nutrition, it belongs to the research area of pediatrics. Because children's skeletal dysplasia during the growth period affects height development or the appearance of adults in the future, they are parents Least want to see
In terms of the amount of calcium intake and whether vitamin D is lacking in relation to osteoporosis, it belongs to the field of nutrition research;
Regular weight-bearing exercise and exercise under the sun can reduce and delay the occurrence of osteoporosis, which is closely related to sports medical research. In addition, osteoporosis is also related to genetics, biomechanics, biochemistry, and molecular biology.
The bone mineral density assessment determines the absorption and uptake of osteogenic materials during the growth and development of children, and can analyze internal and external factors that may affect their growth and development, in order to timely develop targeted nutrition and exercise programs to ensure that children grow and develop The advantages, especially regarding the need for calcium supplementation, how to supplement it, whether to solve the problem of intake or absorption, can only really solve the problem through accurate evaluation and professional analysis.

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