A 2D to 3D ultrasound image registration algorithm for robotically assisted laparoscopic radical prostatectomy

Mehdi Esteghamatian; Stephen E. Pautler; Charles A. McKenzie; Terry M. Peters

doi:10.1117/12.878112

11 March 2011 A 2D to 3D ultrasound image registration algorithm for robotically assisted laparoscopic radical prostatectomy

Mehdi Esteghamatian, Stephen E. Pautler, Charles A. McKenzie, Terry M. Peters

Author Affiliations +

Proceedings Volume 7962, Medical Imaging 2011: Image Processing; 79621Z (2011) https://doi.org/10.1117/12.878112
Event: SPIE Medical Imaging, 2011, Lake Buena Vista (Orlando), Florida, United States

Abstract

Robotically assisted laparoscopic radical prostatectomy (RARP) is an effective approach to resect the diseased organ, with stereoscopic views of the targeted tissue improving the dexterity of the surgeons. However, since the laparoscopic view acquires only the surface image of the tissue, the underlying distribution of the cancer within the organ is not observed, making it difficult to make informed decisions on surgical margins and sparing of neurovascular bundles. One option to address this problem is to exploit registration to integrate the laparoscopic view with images of pre-operatively acquired dynamic contrast enhanced (DCE) MRI that can demonstrate the regions of malignant tissue within the prostate. Such a view potentially allows the surgeon to visualize the location of the malignancy with respect to the surrounding neurovascular structures, permitting a tissue-sparing strategy to be formulated directly based on the observed tumour distribution. If the tumour is close to the capsule, it may be determined that the adjacent neurovascular bundle (NVB) needs to be sacrificed within the surgical margin to ensure that any erupted tumour was resected. On the other hand, if the cancer is sufficiently far from the capsule, one or both NVBs may be spared. However, in order to realize such image integration, the pre-operative image needs to be fused with the laparoscopic view of the prostate. During the initial stages of the operation, the prostate must be tracked in real time so that the pre-operative MR image remains aligned with patient coordinate system. In this study, we propose and investigate a novel 2D to 3D ultrasound image registration algorithm to track the prostate motion with an accuracy of 2.68±1.31mm.

Citation Download Citation

Mehdi Esteghamatian, Stephen E. Pautler, Charles A. McKenzie, and Terry M. Peters "A 2D to 3D ultrasound image registration algorithm for robotically assisted laparoscopic radical prostatectomy", Proc. SPIE 7962, Medical Imaging 2011: Image Processing, 79621Z (11 March 2011); https://doi.org/10.1117/12.878112

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