High Bandpass Spatial Filtering Of The Primary X-Ray Beam
High Bandpass Spatial Filtering Of The Primary X-Ray Beam
复制标题
主 X 射线束的高带通空间滤波
DOI：
10.1117/12.958920
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发表时间：
1980
期刊：
影响因子：
5.5
通讯作者：
E. E. Christensen
中科院分区：
文献类型：
--
作者：
E. Pennington;R. C. Murry;E. E. Christensen
一种对初级 X 射线束进行空间滤波以强调患者体内中频和高频结构的方法正在研究中。在一项可行性研究中，构建了一个铜滤波器来补充侦察薄膜的低频结构。将滤光片置于 X 射线束中并拍摄新的射线照片。结果是最终的 X 射线，其中低频结构被抑制，即中频和高频结构被强调。这为小型、低对比度结构提供了几乎恒定的检测概率，无论它们在患者体内的位置如何。从几个这样的过滤器获得的结果非常令人鼓舞。
A method of spatially filtering the primary x-ray beam to emphasize the middle and upper frequency structure within a patient is under investigation. In a feasibility study, a copper filter is constructed which complements the low frequency structure of a scout film. The filter is placed in the x-ray beam and a new radiograph is taken. The result is a final x-ray in which the low frequency structures are suppressed, i.e., the middle and upper frequency structures are emphasized. This provides nearly constant detection probabilities for small, low contrast structures, regardless of their location in the patient. The results obtained from several such filters are very encouraging.