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目的 利用多层螺旋CT技术研究一套能够原位、快速、准确、无损地进行作物根系观察和测量的方法。方法 选取有代表意义的3种作物,该3种作物分别种植在2种不同生长基质共9个花盆中,将作物连同基质、花盆一起利用德国西门子sensation 4 多层螺旋CT机进行容积扫描,扫描参数为:120kV,90mAs,层厚1mm,8层/s,螺距5mm/转。把获得的作物根系图像的容积数据导入CT3D工作站,利用机器所带的图像后处理软件MIP、SSD、MPR、VR对图像进行成像。经处理过的图像由两位CT专职医生和两位植物根系研究人员对图像质量进行评价,图像质量分为很好、好、不好3个等级。结果 图像质量很好的3种,好的17种,不好的16种。结论 多层螺旋CT可作为一种原位、快速、准确、无损观察作物根系构形的方法,其中以有机培养基质中显示的根系最理想;几种CT成像方法中,以最大密度投影(MIP)成像法图像效果最好。
Objective To study a set of methods for crop root observation and measurement in situ, rapid, accurate and nondestructive using multi-slice spiral CT technique. Methods Three representative crops were selected. The three crops were planted in 9 flower pots of 2 kinds of different growth substrates respectively. The crops were scanned with volumetric scanning using a German Siemens sensation 4 multislice CT scanner , Scanning parameters: 120kV, 90mAs, layer thickness 1mm, 8 layers / s, pitch 5mm / turn. The volume data of crop root images obtained were introduced into the CT3D workstation and the images were imaged using the image post-processing software MIP, SSD, MPR, VR provided by the machine. The processed images were evaluated by two CT full-time physicians and two plant-roots researchers for image quality, which were categorized as good, good, and bad. Results The image quality is very good 3 kinds, good 17 kinds, not good 16 kinds. Conclusions Multi-slice spiral CT can be used as an in situ, rapid, accurate and non-destructive method to observe the root architecture of crop plants. Among them, the root system displayed by organic culture medium is the most ideal. Among the several CT imaging methods, MIP ) Imaging method the best image.