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SNMMI 2014に参加して

机译:参加SNMMI 2014

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2014年6月7日~6月11日にアメリカ合衆国ミズーリ州セントルイスのSt. Louis Convention Centerで開催された第61回米国核医学会(SNMMI 2014)に平成26年度前期国際研究集会派遣会員として参加したので報告する.私にとっては初めての国際学会への参加であり,大変贵重な経験をしたと考えている.%Purpose: The number of projection data must be more than that for calculating using sampling theory. A streak artifact may occur in the case of FBP method in particular, if the number of projection data is poor. To restrict an injection dose and an acquisition time in the clinical case, the count/projection is kept by setting up the number of few samplings. As these result, an artifact may occur. The goal of this study is to develop and evaluate the novel acquisition method for removing streak artifact. Method: It is that the method to increase the number of sampling by creating the new projection data between each step by acquiring during the movement between each step using step-and-shoot mode (SSM). We defined this method as continuous + step-and-shoot mode (C + SSM). The quality of image such as spatial resolution, contrast and noise was compared between SSM and C + SSM using the simulation data. Furthermore, the artifact depression effect for C + SSM was examined using the phantom with the high radioactivity induced an artifact source. Result: The spatial resolution for C + SSM was slightly lower than that for SSM. Both of contrast and noise were almost equivalent. The artifact was completely controlled, and the depression effect was high enough. Conclusion: We developed the novel acquisition method (C + SSM) for doubling the number of sampling without change of conditions such as an injection dose, an acquisition time and pixel size. This method may be useful for removing the streak artiract.
机译:参加了2014年6月7日至6月11日在美国密苏里州圣路易斯会议中心举行的第61届美国核医学学会(SNMMI 2014)2014年第一次国际会议的派遣成员。 %目的:投影数据的数量必须大于使用采样理论计算的数量。特别是在FBP方法的情况下,可能会出现投影数据数量少的情况。在临床情况下,为了限制注射剂量和采集时间,可通过设置少量采样来保持计数/投影。这些结果可能会出现伪影。本研究的目的是开发和评估消除条纹伪影的新型采集方法。方法:通过在每个步骤之间创建新的投影数据来增加采样数量的方法。使用步进拍摄模式(SSM)在每步之间移动时进行获取,我们将此方法定义为连续+步进拍摄模式(C + SSM),图像质量(例如空间分辨率,对比度使用仿真数据比较了SSM和C + SSM的st和噪声。完成后,使用高放射性诱发假象源的体模检查了C + SSM的伪影抑制效果。结果:C + SSM的空间分辨率为结论:我们开发了一种新颖的采集方法(C + SSM),可在不增加采样率的情况下使采样数量加倍,从而降低了对比度,降低了噪声。改变注射剂量,采集时间和像素大小等条件。此方法对于去除条纹伪影可能很有用。

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