Mammographic phantom studies with synchrotron radiation
Mammographic phantom studies with synchrotron radiation
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DOI：
10.1148/radiology.200.3.8756911
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发表时间：
1996-09-01
期刊：
影响因子：
19.7
通讯作者：
Sayers, D
中科院分区：
文献类型：
--
作者：
Johnston, RE;Washburn, D;Sayers, D
目的：探讨单能光子在乳腺成像中提高图像对比度的潜力。材料和方法：国家同步加速器光源可获得的x射线能量为5至50千伏特以上。用可调谐晶体单色器选择特定能量。物体用80.0 x 0.5 mm的窄光束扫描。乳房x线照相术幻影以底片和胶片作为成像探测器成像。在16-24 keV下获得幻象图像，并与传统乳房x线摄影装置获得的图像进行比较。结果：初步结果表明，与传统x射线源获得的图像相比，单能图像的对比度有所提高，特别是在18 keV及以下。结论：试点结果令人鼓舞，作者目前继续探索单能光子成像与改进的仪器，散射抑制和组织样本的使用。
PURPOSE: To explore the potential improvement in image contrast for breast imaging with use of monoenergetic photons.MATERIALS AND METHODS: The x-ray energy available from the National Synchrotron Light Source is from 5 to over 50 keV. A specific energy is selected with a tunable crystal monochromator. The object is scanned with a narrow beam of 80.0 x 0.5 mm. Mammography phantoms were imaged with plate and film as the imaging detectors. Phantom images were obtained at 16-24 keV and compared with images obtained with a conventional mammographic unit.RESULTS: Preliminary findings indicate improved image contrast of the monoenergetic images compared with that obtained from the conventional x-ray source, particularly at 18 keV and below.CONCLUSION: Pilot results are encouraging, and the authors presently continue to explore monoenergetic photon imaging with improved instrumentation, scatter rejection, and use of tissue samples.