目的：验证分析放射治疗应用靶区勾画软件MIM的CT图像自动刚性配准的准确性。方法：利用西门子SOMATOM Definition AS CT扫描机对Penta-Guide模体进行扫描,获得的CT图像作为参考图像,再将模体相对于等中心沿左右、头脚和前后3个方向移...目的：验证分析放射治疗应用靶区勾画软件MIM的CT图像自动刚性配准的准确性。方法：利用西门子SOMATOM Definition AS CT扫描机对Penta-Guide模体进行扫描,获得的CT图像作为参考图像,再将模体相对于等中心沿左右、头脚和前后3个方向移动预定的距离,以及在冠状面旋转预定角度再平移,分别进行CT扫描;所获得的CT图像以DICOM格式传输至MIM6.5.4系统,与参考图像配准,分析左右、头脚和前后方向的平移配准误差以及冠状面旋转配准误差;选择头部肿瘤患者进行患者CT图像配准的验证。结果：Penta-Guide模体在左右、头脚和前后3个方向的配准误差均〈1 mm,冠状面旋转方向配准误差均〈0.5~o。头部疾病患者在左右、头脚和前后3个方向的配准误差也〈1 mm。结论：MIM软件CT图像自动刚性配准的准确性好,操作简单,可应用于临床。展开更多
In existing software registration schemes, the privacy of users is not taken into account and may be in the risks of abuses. In this paper, we proposed a novel software registration system which can greatly reduce una...In existing software registration schemes, the privacy of users is not taken into account and may be in the risks of abuses. In this paper, we proposed a novel software registration system which can greatly reduce unauthorized use of software while keeping the privacy of users. To the best of our knowledge, this is the first system that the privacy of users is guaranteed in software registration. Our system enjoys a modular design and can be implemented by any secure ID-based partially blind signature scheme. Furthermore, the proposal allows flexible registration information definition. This feature makes our scheme flexible and practical for more software registration applications.展开更多
基金Supported by the National High Technology Research and Development Program of China (863 Program) (2006AA01Z442)the Spanish Government through Projects (E-AEGIS) (TSI2007- 65406-C03-01)+1 种基金(ARES) CONSOLIDER INGENIO 2010 (CSD2007- 00004)the Government of Catalonia (2005 SGR 00446)
文摘In existing software registration schemes, the privacy of users is not taken into account and may be in the risks of abuses. In this paper, we proposed a novel software registration system which can greatly reduce unauthorized use of software while keeping the privacy of users. To the best of our knowledge, this is the first system that the privacy of users is guaranteed in software registration. Our system enjoys a modular design and can be implemented by any secure ID-based partially blind signature scheme. Furthermore, the proposal allows flexible registration information definition. This feature makes our scheme flexible and practical for more software registration applications.
