| In-vitro evaluation of a soft-tissue navigation system for laparoscopic prostatectomy. | |
| | |
MedLine Citation:
|
PMID: 20726787 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
PURPOSE: We introduce a custom-designed phantom model for the in-vitro evaluation of an augmented reality-based soft-tissue navigation system for ultrasound-guided prostate interventions. MATERIALS AND METHODS: Transrectal ultrasound segmentation of the prostate, navigation aid placement, initial registration, endoscope tracking, and enhanced visualization steps in the navigation procedure were performed to accommodate the actual prostatic motion. In-vitro laparoscopic manipulations simulating surgical procedures were performed by a physician using human prostate specimens. The target visualization error, defining the accuracy of the tracking, is determined by means of a leave-out test strategy by alternately using four navigation aids for endoscope registration and the remaining two navigation aids for accuracy verification. RESULTS: The introduction of the navigation aids lasted approximately 3 minutes. The navigation aids and especially their barbs were visible because of their ultrasound reflecting nature. For each organ, 1000 endoscope registrations were calculated, in which two randomly chosen navigation aids served the purpose of verifying the pose. We were able to demonstrate that the superimposed image could follow automatically the videoendoscopic real-time view. The mean target visualization errors for the respective trials were determined as 0.81 (±0.12) mm, 0.62 (±0.14) mm, and 0.98 (±0.23) mm. CONCLUSIONS: The ultrasound-based inside-out navigation system for laparoscopic prostatectomy overcomes the problem of tissue shift and deformation in an in-vitro model. In case of organ movement, the augmented picture with the detected navigation aids could follow the videoendoscopic image using the navigation aids as landmarks. |
| | |
Authors:
|
Dogu Teber; Tobias Simpfendörfer; Selcuk Guven; Matthias Baumhauer; Ali Serdar Gözen; Jens Rassweiler |
Related Documents
:
|
11597107 - Feasibility of in situ napl-contaminated aquifer bioremediation by biodegradable nutrie... 17614677 - Stability of piecewise affine systems with application to chaos stabilization. 16770857 - Reforming the oversight of multi-site clinical research: a review of two possible solut... 9813747 - Black churches as therapeutic systems: a group process perspective. 2655067 - Social problem solving in schizophrenia. 3918187 - Immune status of blood product recipients. |
Publication Detail:
|
Type: Evaluation Studies; Journal Article |
Journal Detail:
|
Title: Journal of endourology / Endourological Society Volume: 24 ISSN: 1557-900X ISO Abbreviation: J. Endourol. Publication Date: 2010 Sep |
Date Detail:
|
Created Date: 2010-09-15 Completed Date: 2011-01-05 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 8807503 Medline TA: J Endourol Country: United States |
Other Details:
|
Languages: eng Pagination: 1487-91 Citation Subset: IM |
Affiliation:
|
Department of Urology, SLK Kliniken Heilbronn, Heilbronn, Germany. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Endoscopy Humans Laparoscopy* Male Prostate / surgery*, ultrasonography Prostatectomy / methods* Surgery, Computer-Assisted / methods* Ultrasound, High-Intensity Focused, Transrectal / methods* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Chemical composition and antioxidant and antimycobacterial activities of Bromelia balansae (Bromelia...
Next Document: Association of monocyte chemotactic protein-1 and CC chemokine receptor 2 gene variants with preecla...