脂肪乳腺组织的X射线衰减:使用光谱成像的体外和体内测量
X-ray attenuation of adipose breast tissue: in-vitro and in-vivo measurements using spectral imaging
摘要:
新的X射线成像技术的发展通常需要组织衰减的先验知识,但是这种信息的来源是稀疏的。我们已经测量了脂肪乳腺组织的衰减使用光谱成像,在体外和体内。对于体外测量,脂肪乳腺组织的固定样本在光谱乳腺X射线摄影系统上成像,并且根据铝和聚甲基丙烯酸甲酯(PMMA)的等效厚度测量能量依赖性X射线衰减。对于体内测量,将类似的程序应用于许多光谱筛查乳房X线照片。两次测量的结果一致,并与已发表的衰减数据和组织等效材料的测量结果一致。
英文摘要:
The development of new x-ray imaging techniques often requires prior knowledge of tissue attenuation, but the sources of such information are sparse. We have measured the attenuation of adipose breast tissue using spectral imaging, in vitro and in vivo. For the in-vitro measurement, fixed samples of adipose breast tissue were imaged on a spectral mammography system, and the energy-dependent x-ray attenuation was measured in terms of equivalent thicknesses of aluminum and poly-methyl methacrylate (PMMA). For the in-vivo measurement, a similar procedure was applied on a number of spectral screening mammograms. The results of the two measurements agreed well and were consistent with published attenuation data and with measurements on tissue-equivalent material.
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