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核素扫描机具有价格低廉以及它的某种独特优点,被人们视为脏器显象和肿瘤定位的一种重要手段。至今,国产扫描机的总数量约有500余台,基本上已普及到全国各大、中医院。但是,人们对它的成象质量并不满意,因为即使相当先进的扫描机,对于肝脏等深部大脏器肿瘤的实际分辨率在直径3cm以上。因此,如何提高核素扫描机的分辨率一直是核医学临床工作者和核医学仪器设计人员研究探讨的课题。早先,人们为了改进扫描机的质量,主要从两方面着手:其一是从改善准直器的特性方面去努力,于
Nuclide scanners, with their low price and some unique advantages, are regarded as an important means of visceral imaging and tumor localization. So far, the total number of domestic scanners about 500 units, basically has spread to the major Chinese medicine hospital. However, people are not satisfied with its imaging quality because even a fairly advanced scanner has an actual resolution of 3 cm or more in diameter for a deep large organ such as a liver. Therefore, how to improve the resolution of radionuclide scanners has always been a topic discussed by nuclear medicine clinicians and nuclear medicine instrument designers. Earlier, in order to improve the quality of the scanner, people mainly started from two aspects: one was to improve the characteristics of the collimator,