双能X射线吸收计不证实克雷格测试的有效性
Kelsey A Clark1, Savannah Nielsen1, Taylor Heywood1
1Brigham Young University, Provo, Utah, United States.
概括
克雷格的克雷格.
科学领域:
- 整形外科 整形外科 整形外科
- 放射学 放射学是一门学科.
- 生物医学工程 生物医学工程
背景情况:
- 克雷格的测试是一种临床方法,用于测量股骨版本.
- 与3D成像相比,克雷格测试的准确性存在一些担忧.
- 双能X射线吸收计 (DXA) 是用于骨密度评估的常见成像技术.
研究的目的:
- 间接评估使用DXA的克雷格测试的有效性.
- 为了比较标准和定制部定位之间的DXA骨矿物质密度 (BMD) 读数.
主要方法:
- 23名志愿者接受了两次部DXA扫描.
- 扫描使用标准形进行部定位,并根据克雷格的测试结果定制定位.
- 配对t测试被用来比较两个定位方法之间的BMD值.
主要成果:
- 一个不显著的趋势显示,与定制位置相比,标准位置的BMD较低 (p=0.065).
- 与假设相反,在定制姿势中,BMD并没有显著降低.
- 发现了传统和定制位置的BMD读数之间的差异的微弱证据.
结论:
- 克雷格的测试可能不是一个有效的临床测量真正的股骨版本.
- 在DXA扫描期间使用形的标准部定位比基于克雷格测试的定制定位更可取.
- 需要进一步的研究来验证大腿部版本的临床评估.
相关概念视频
01:20Imaging Studies for Cardiovascular System III: X-Ray
188
The most common cardiovascular diagnostic test is an X-ray. It produces images of the heart, blood vessels, and adjacent structures.
Definition and Purpose
An X-ray, or radiograph, is a non-invasive method that uses ionizing radiation to take images of internal structures. It is mainly used in cardiac imaging to examine the heart, lungs, and major blood vessels, aiming to identify abnormalities in the heart's size, shape, and position, such as heart failure, congenital defects, and vascular...
Definition and Purpose
An X-ray, or radiograph, is a non-invasive method that uses ionizing radiation to take images of internal structures. It is mainly used in cardiac imaging to examine the heart, lungs, and major blood vessels, aiming to identify abnormalities in the heart's size, shape, and position, such as heart failure, congenital defects, and vascular...
188
01:10X-ray Diffraction of Biological Samples
3.8K
X-ray diffraction or XRD is an analytical tool that utilizes X-rays to study ordered structures such as crystalline organic and inorganic samples, polycrystalline materials, proteins, carbohydrates, and drugs.
According to Bragg's law, when X-rays strike the sample positioned on a stage, the rays are scattered by the electron clouds around the sample atoms. The X-ray diffraction or scattering is caused by constructive interference of the X-ray waves that reflect off the internal...
According to Bragg's law, when X-rays strike the sample positioned on a stage, the rays are scattered by the electron clouds around the sample atoms. The X-ray diffraction or scattering is caused by constructive interference of the X-ray waves that reflect off the internal...
3.8K