Recurrent nasal tumor detection by dynamic MRI
Wen-Chen Huang, Cheng Chung Hsu, Chung‐Nan Lee, Ping‐Hong Lai · IEEE Engineering in Medicine and Biology Magazine · 1999
The purpose of this research is to detect and enhance the recurrent nasal tumor region by computing the relative intensity difference between consecutive MR images after using a contrast agent. In this article, we apply a relative signal increase model to recognize a recurrent nasal tumor by dynamic MR images. A robust estimation technique is used to deal with matching corresponding points among different images. The active contour technique is applied to refine automatically the region of interest and obtain a more precise definition of the area of interest. The quantitative evaluation of dynamic MR data is modeled by fitting three-parameter time-intensity curves.