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绪言大多数超声诊断装置是显示被检物体的切面象,医生观察一组连续的切面图象而建立物体的三维结构表象。研究超声全息成象大大促进了再现一个直观三维超声象的可能性,但是它难于实现,部份原因是由于超声波与光波间的波长比例大而产生象差,部份原因是全息图对于超声波波长来说是小的。在另一方面提出了用一超声切面象进行光学合成得到直观三维象的方法,在这些方法中应用了光全息技术或一组印有切面景象的玻璃片。但是,这些方法
INTRODUCTION Most ultrasonic diagnostic devices display the cut surface of an object to be examined. The physician observes a continuous series of cut surfaces to create a three-dimensional surface representation of the object. The study of ultrasound holographic imaging has greatly facilitated the possibility of reproducing an intuitive three-dimensional ultrasound image, but it is difficult to achieve, in part because of the large proportion of the wavelength between the ultrasound and the light wave, resulting in aberrations in part due to the hologram’s dependence on the ultrasound wavelength It is small. On the other hand, a method of optically synthesizing three-dimensional images using an ultrasound section image is proposed. In these methods, optical holography or a group of glass sheets printed with a sectional view is used. However, these methods