首页>
外国专利>
METHOD OF RADIATION DOSE REDUCTION VIA FRACTIONAL COMPUTERIZED TOMOGRAPHIC SCANNING AND SYSTEM THEREOF
METHOD OF RADIATION DOSE REDUCTION VIA FRACTIONAL COMPUTERIZED TOMOGRAPHIC SCANNING AND SYSTEM THEREOF
展开▼
机译:分数线计算机断层扫描减少辐射剂量的方法及其系统
展开▼
页面导航
摘要
著录项
相似文献
摘要
There is provided a method of computer tomography (CT) volume reconstruction based on baseline sinograms, the method comprising: obtaining partial scan sinograms in a number of directions smaller than the number of directions in the baseline scan; aligning baseline sinograms and partial scan sinograms utilizing rigid registration in three-dimensional Radon space, generating configuration data informative of rays to be cast in a further repeat scan in an un-scanned direction, wherein the generating configuration data comprises: identifying, from a partial scan sinogram, rays with intensities that significantly differ from intensities of corresponding rays in an aligned baseline sinogram, identifying regions of the scanned object in which identified changed rays intersect, determining scan angles and associated rays to be cast in a further repeat scan according to the identified regions; obtaining sinograms of a repeat scan performed according to generated configuration data and processing the sinograms into an image of the object.
展开▼