Studies of a prototype linear stationary x-ray source for tomosynthesis imaging.
Studies of a prototype linear stationary x-ray source for tomosynthesis imaging.
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DOI：
10.1088/0031-9155/59/10/2393
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发表时间：
2014-05-21
影响因子：
3.5
通讯作者：
Shao J
中科院分区：
文献类型：
--
作者：
Schwoebel PR;Boone JM;Shao J
研究了用于实现固定源-固定探测器断层合成成像的原型线性 X 射线源。潜在的应用包括人类乳房和小动物成像。该源由十个 X 射线源元件组成，每个元件由场发射阴极、静电透镜和靶组成。静电透镜和目标对于所有元件都是通用的。源元件在高达 40 mA 的电子束电流和 40 kV 的束电压下形成最小直径为 0.3 至 0.4 mm 的 X 射线焦点。量化每个源的 X 射线通量与时间的关系。使用 35 至 50 keV 的电子束能量产生钨靶材的 X 射线轫致辐射谱。对于 35 kV、40 kV 和 45 kV 管电势，使用钨靶测量半值层分别为 0.8 mm、0.9 mm 和 1.0 mm。电压击穿事件的抑制，特别是在源操作期间，以及使用标准冷阴极几何形状的修改形式，增强了源的可靠性。原型线性源用于使用数字断层合成重建方法收集小鼠体模的断层摄影数据集，并展示半峰全宽为 1.3 mm 的切片灵敏度剖面。最后，对通过小鼠模型的流动的断层成像进行了初步研究。
A prototype linear X-ray source to implement stationary source – stationary detector tomosynthesis imaging has been studied. Potential applications include human breast and small animal imaging. The source is comprised of ten X-ray source elements each consisting of a field emission cathode, electrostatic lens, and target. The electrostatic lens and target are common to all elements. The source elements form X-ray focal spots with minimum diameters of 0.3 to 0.4 mm at electron beam currents of up to 40 mA with a beam voltage of 40 kV. The X-ray flux versus time was quantified from each source. X-ray bremsstrahlung spectra from tungsten targets were produced using electron beam energies from 35 to 50 keV. The half-value layer was measured to be 0.8 mm, 0.9 mm, and 1.0 mm, respectively, for the 35 kV, 40 kV, and 45 kV tube potentials using the tungsten target. The suppression of voltage breakdown events, particularly during source operation, and the use of a modified form of the standard cold-cathode geometry, enhanced source reliability. The prototype linear source was used to collect tomographic data sets of a mouse phantom using digital tomosynthesis reconstruction methods and demonstrated a slice-sensitivity profile with a full-width-half-maximum of 1.3 mm. Lastly, preliminary studies of tomographic imaging of flow through the mouse phantom were performed.
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影响因子：
3.8
作者：
Godfrey, Devon J.;McAdams, H. Page;Dobbins, James T., III
通讯作者：
Dobbins, James T., III
影响因子：
1.4
作者：
Schwoebel, PR;Spindt, CA;Holland, CE
通讯作者：
Holland, CE
影响因子：
2.6
作者：
Jung, H. N.;Chung, M. J.;Lee, K. S.
通讯作者：
Lee, K. S.
影响因子：
4
作者：
Schwoebel, PR
通讯作者：
Schwoebel, PR
影响因子：
19.7
作者：
Niklason, LT;Christian, BT;Wirth, RF
通讯作者：
Wirth, RF