Bone mineral density scans
Bone mineral density scans
复制标题
骨矿物质密度扫描
作者：
A. Berger
……；在骨矿物质密度 (BMD) 扫描中，穿过骨骼的 X 射线束的能量被吸收，而未吸收的能量则在身体的另一侧被检测到。骨骼越致密（矿物质含量越高），吸收的能量就越多，检测到的能量就越少。 ![][1]
……；检测每个像素（“图像元素”）的辐射能量并将其转换为以 g/cm2 为单位测量的“面密度”。将区域中的像素数相加，然后计算每个像素中的骨骼量。这允许计算所讨论的特定骨骼的骨密度。
……；基本的 BMD 测量需要患者“在桌子上”……
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…; In bone mineral density (BMD) scanning, the energy of x ray beams that are passed through bones is absorbed, and what is not absorbed is detected on the other side of the body. The more dense the bones (from greater mineral content), the more energy is absorbed, and the less energy detected. ![][1]
…; The radiation energy per pixel (“picture element”) is detected and converted into an “areal density” measured in g/cm2. The number of pixels in the area is summed, then the amount of bone in each pixel is calculated. This allows a bone density to be calculated for the specific bone in question.
…; Basic BMD measurement requires the patient to be “on the table” …
[1]: /embed/graphic-1.gif