Navigated ultrasound in laparoscopic surgery

Solberg, Ole Vegard; Langø, Thomas; Tangen, Geir; Mårvik, Ronald; Ystgaard, Brynjulf; Rethy, Anna; Hernes, Toril A. Nagelhus

doi:10.1080/13645700802383975

Cited by 36 publications

(24 citation statements)

References 56 publications

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“…Ultrasound integrated with preoperative CT can help the understanding of the LUS images in correspondence with surrounding anatomy. Solberg et al 5 have shown that image fusion techniques make it easier to perceive the integration of two or more volumes in the same display (monitor) than mentally fusing the same volumes presented in their own separate displays. The ultrasound data will show updated information that the surgeon relies on during surgery, while the advantages from CT, such as better overview and understanding of the anatomy and pathology, are displayed simultaneously.…”

Section: Discussionmentioning

confidence: 99%

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Development of a Multimodal Tumor Model for Porcine Liver

Rethy

Langø

Aasland

et al. 2010

Journal of Gastrointestinal Surgery

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In our efforts to develop a guidance system for laparoscopic liver surgery, we are working towards a live animal tumor model. The objective of this study was to establish the tumor model for live porcine liver, visible on both computed tomography (CT) and ultrasound images. The tumor model was created by injecting a mixture of agarose, sephadex, and glycerol. Together with water, the mixture was heated to bring its components into solution. Once heating was complete, methylthionine chloride and CT contrast were added. Using laparoscopic ultrasound guidance, the tumor model mixture was injected into in vivo porcine liver. The resulting model tumors were radiolucent, visible on both CT and conventional X-ray. They appeared as hyperechoic lesions on ultrasound images. Compared to the CT images, the model tumors in the ultrasound images showed good correspondence in size. We conclude that our tumor model, due to its clearly identifiable nature on multiple imaging modalities, is a valuable tool for further studies on laparoscopic ultrasound (2D and 3D) and navigated ultrasound in laparoscopic surgery of the liver and other organs in a pre-clinical set-up.

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Section: Discussionmentioning

confidence: 99%

“…[1][2][3][4][5] To develop and evaluate the usability, possible clinical benefits, and the accuracy of these systems, a life-like tumor model in a live animal set-up is both beneficial and necessary. The purpose of this study was to develop a tumor model in an in vivo porcine liver tissue that is visible on multiple imaging modalities.…”

Section: Introductionmentioning

confidence: 99%

Development of a Multimodal Tumor Model for Porcine Liver

Rethy

Langø

Aasland

et al. 2010

Journal of Gastrointestinal Surgery

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“…[20], Leven et al [21], Bao et al [22,23], Hildebrand et al [24][25][26][27], Solberg et al [28], Feuerstein et al [29], Baumhauer et al [30], and Estepar et al [31].…”

mentioning

confidence: 99%

Laparoscopic ultrasound: a survey of its current and future use, requirements, and integration with navigation technology

et al. 2010

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“…[4,10] In laparoscopic surgery, electromagnetic (EM) tracking has been proposed, especially to guide flexible laparoscopic ultrasound probes and ablation probes in liver surgery. [6,13] Preliminary tests combining small ultrasound probes and navigation for spinal surgery also indicate that the added flexibility provided by EM tracking may be advantageous. In addition, several commercial products exist, such as StealthStation Axiem (Medtronic Navigation, Louisville, USA), PercuNav (Philips Healthcare, DA Best, The Netherlands), iGuide CAPPA (Siemens AG, Munich, Germany), i-Logic (SuperDimension Gmbh, Dusseldorf, Germany) and ig4 (Veran Medical Technologies, Inc., St. Louis, USA).…”

Section: Introductionmentioning

confidence: 99%

Accuracy of electromagnetic tracking with a prototype field generator in an interventional OR setting

et al. 2011

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We have studied the accuracy and robustness of a prototype electromagnetic window field generator WFG in an interventional radiology suite with a robotic C-arm. The overall purpose is the development of guidance systems combining real-time imaging with tracking of flexible instruments for bronchoscopy, laparoscopic ultrasound, endoluminal surgery, endovascular therapy and spinal surgery.The WFG has a torus shape, which facilitates X-ray imaging through its centre. We compared the performance of the WFG to that of a standard field generator SFG under the influence of the C-arm. Both accuracy and robustness measurements were performed with the C-arm in different positions and poses.The system was deemed robust for both field generators, but the accuracy was notably influenced as the C-arm was moved into the electromagnetic field. The SFG provided a smaller root-mean-square position error, but was more influenced by the C-arm than the WFG. The WFG also produced smaller maximum and variance of the error.EM tracking with the new WFG during C-arm based fluoroscopy guidance seems to be a step forward, and with a correction scheme implemented it should be feasible.

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Navigated ultrasound in laparoscopic surgery

Cited by 36 publications

References 56 publications

Development of a Multimodal Tumor Model for Porcine Liver

Development of a Multimodal Tumor Model for Porcine Liver

Laparoscopic ultrasound: a survey of its current and future use, requirements, and integration with navigation technology

Accuracy of electromagnetic tracking with a prototype field generator in an interventional OR setting

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