Trabecular bone score
Trabecular Bone Score (TBS)
Trabecular Bone Score (TBS) is a non-invasive medical imaging technique used to assess bone health and predict osteoporotic fracture risk. Pronounced as "truh-bek-yuh-lar bone score", the term originates from the Latin word "trabecula", meaning "small beam", and refers to the lattice-like structure of spongy bone tissue.
Definition
TBS is a gray-level textural metric that evaluates pixel gray-level variations in the lumbar spine dual-energy X-ray absorptiometry (DXA) image, providing an indirect index of trabecular microarchitecture.
Usage
TBS is used in conjunction with bone mineral density (BMD) measurements to provide a more comprehensive assessment of an individual's fracture risk. It is particularly useful in cases where BMD results are inconclusive or when a patient has a condition that may affect bone quality, such as diabetes or rheumatoid arthritis.
Calculation
The TBS is calculated using software that analyzes the texture of the DXA image. The resulting score ranges from 1.2 to 2.0, with lower scores indicating poorer bone structure and higher fracture risk.
Related Terms
- Osteoporosis: A medical condition in which the bones become brittle and fragile from loss of tissue.
- Bone Mineral Density (BMD): The amount of bone mineral in bone tissue.
- Dual-energy X-ray absorptiometry (DXA): A means of measuring bone mineral density (BMD).
- Lumbar Spine: The lower part of the spine between the ribs and the pelvis.
External links
- Medical encyclopedia article on Trabecular bone score
- Wikipedia's article - Trabecular bone score
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