Contrast Enhancement of CT Medical Images Using Multiscale Edge Representation
Feng Rui Sun · 2005
Window technique is a universal method of image display in CT radiology clinics. Due to the CT number of various tissues, organs or structures being different in a variety of dynamic ranges, the operations of reasonably selecting and manually adjusting Window Level/Width are required in order to observe the details of structures in an optimal display. Otherwise, the fiber of an organism or the focus can not be displayed clearly, even resulting in the diagnostic information lost, films wasted and mistakes in diagnosis. The proper operations depend on the clinical experiences. And the manual performing causes lots of inconvenience for radiologists to analyze images and diagnose. In the paper, a new method of CT medical images contrast enhancement is represented based on the multiscale edge representation of signals proposed by Mallat and Zhong. Comparing with the traditional Window technique, our method is adaptive, and the manual operation to adjust properly Window Level / Width can be avoided. In addition, this method can enhance the contrast of organisms whose intensity are different less, stress edge contours of an organism much more, and display fine and tiny structures more clear. These properties make our method meet the demand of radiology clinics much better, and indicate the practicality and potential application value of the proposed method in the field of CT medical images contrast enhancement.