股骨颈水平侧位投照的体会
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[摘要] 目的：分析使用滤线器在股骨颈水平侧位投照中的价值，在普通X线-胶片摄影系统、CR(间接成像)数字化X线摄影系统及DR(直接成像)数字化X线摄影系统的意义。方法：应用普通X线-胶片摄影系统、CR和DR各对10例股骨颈骨折置换术后的患者行股骨颈水平侧位投照，首先使用滤线器投照，然后不使用滤线器投照，比较图像质量的差异。结果：在股骨颈水平侧位投照时，滤线器在普通X线-胶片摄影系统，CR及DR上都能适用，而且使用了滤线器投照的图像比不用滤线器的图像更清晰，对比度更好。结论：在作股骨颈水平侧位的投照时，无论是普通的X线-胶片摄影系统，CR还是DR数字化摄影系统，都需要使用滤线器。
[关键词] 股骨颈；CR、DR摄影系统；滤线器；图像清晰度
[中图分类号] R445 [文献标识码]C[文章编号]1673-7210(2011)03(c)-082-02
The experience of the projection of the level lateral femoral neck
HUANG Jianwei, ZHOU Danyan, YUAN Zhiguang
Department of Radiology, the Third Affiliated Hospital of Guangzhou Medical College, Guangzhou 510150
[Abstract] Objective: To analysis the value of using the filter line device in the level lateral projection of femoral neck, including the ordinary X-ray film photography system, CR (indirect imaging) digital X-ray photography system and DR (directly imaging) digital X-ray photography system. Methods: 30 patients with the replacement after femoral neck fracture were studdied by using ordinary X-ray film photography system (n=10), CR (n=10) and DR (n=10). All patients received level lateral projection of the fractured femoral neck. In order to compare the films quality, we examined these patients with the filter line device and without it, respectively. Results: As for the level projection of femoral neck, using filter line device was all suitable for the ordinary line of X-ray photography system, CR and DR. And the good quality and best contrat occurred after applying the filter line. Conclusion: The filter line device should be used for the level projection of femoral neck, regardless of the ordinary X-ray film photography system, CR or DR digital photography system.
[key words] Femoral neck; CR, DR photography system; Filter line device; Image clarity
[作者简介] 黄健威(1978-)，男，广东广州人，本科学历，技师；研究方向：影像技术。
滤线器选择栅比在10∶1，栅密度在40 LP/cm以上的滤线栅，可以作为固定式的滤线器，即X线曝光瞬间，滤线栅不用运动，胶片上得到的图像不会因滤线栅的不运动而影响图像质量[1]。滤线器是直接吸收散射线的有效设备，在早期普通X线-胶片摄影系统中，应用滤线器在股骨颈水平侧位投照，滤线器能吸收其软射线，能增加胶片的对比度。但是随着数字化X线摄影的发展，在股骨颈水平侧位CR及DR投照时加用滤线器，文献报道较少[2]，本文即研究加用滤线器能否适合于CR和DR，即能否提高图像的质量。
1 资料和方法
1.1 一般资料
股骨颈骨折置换术后患者30例，年龄60~80岁，其中，男22例，女8例。
1.2 材料
滤线器1个(选用栅比为10∶1的滤线器)，普通X线-胶片摄影系统，CR系统及DR系统。
1.3 方法
1.3.1 在普通X线-胶片摄影系统对股骨颈水平侧位投照
选10例股骨颈骨折置换术后的患者 ......
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