TRUS/MRI Fusion-Guided Prostate Biopsy Based on Improved Intracavitary Markers

Guiding prostate biopsy with the fusion of magnetic resonance imaging (MRI) and transrectal ultrasonography (TRUS) could improve the diagnostic rate of prostate cancer. Matching and registering the images of the prostate in MRI and TRUS are the two main problems encountered in fusion-guided biopsy. In this paper, our team presents a method to match corresponding slices from MRI and TRUS based on improved intracavitary markers and image processing. Based on our previous work, we implement the modified thin plate spline-robust point matching to the contour of the prostate for non-rigid registration. The result of our experiments on a dog show that our method based on intracaviraty markers can improve image fusion between TRUS and MRI.