关于磁共振图像质量评价方法的探讨

磁共振信号得到的人体断层图像,不仅可以反映形态学的信息,还可以从图像中得到与病理有关的信息,其图像质量的好坏将直接影响着医护人员对病人的诊断结果.目前对磁共振图像质量评价的重要指标是信号强度均匀度.但在信号强度几乎相同的条件下,这一评价指标的有效性较低.为了对磁共振图像质量作更加有效的评判,可采用比较信噪比的最大与最小区域的信号强度标准差的方法,其评价的有效性较高.

On the estimation methods of magnetic resonance imaging quality

The imaging of fleshly faultage gained by the signal of magnetic resonance can reflect both the morphological information and the information related to pathology, so the quality of imaging directly influences the diagnostic results given by the doctors. At present, the important index of apprasing the quality of magnetic resonance imaging(MRI) is the strength uniformity of signals. But on the condition that the strength of signals is almost equal, the validity of the appraisal index is rather low. In order to appraise the quality of MRI more effectively, the method of comparing the standard deviations of signal strength is adopted,and the comparison is made between the maximum area and the minimum area in regard to the ratio of between signal and noise, then the appraising validity can be better.