Results 1 - 10 of 26

High-Performance Intraoperative Cone-Beam CT on a Mobile C-Arm: An Integrated System for Guidance of Head and Neck Surgery

by J. H. Siewerdsen, A-e M. J. Daly, A H. Chan, S. Nithiananthan, B N. Hamming, C K. K. Brock, J. C. Irish E
"... A system for intraoperative cone-beam CT (CBCT) surgical guidance is under development and translation to trials in head and neck surgery. The system provides 3D image updates on demand with sub-millimeter spatial resolution and soft-tissue visibility at low radiation dose, thus overcoming conventio ..."
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A system for intraoperative cone-beam CT (CBCT) surgical guidance is under development and translation to trials in head and neck surgery. The system provides 3D image updates on demand with sub-millimeter spatial resolution and soft-tissue visibility at low radiation dose, thus overcoming

Efficient Segmentation of 3D Fluoroscopic Datasets from Mobile C-arm

by Martin Styner, Haydar Talib, Digvijay Singh, Lutz-Peter Nolte
"... The emerging mobile fluoroscopic 3D technology linked with a navigation system combines the advantages of CT-based and C-arm-based navigation. The intra-operative, automatic segmentation of 3D fluoroscopy datasets enables the combined visualization of surgical instruments and anatomical structures f ..."
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The emerging mobile fluoroscopic 3D technology linked with a navigation system combines the advantages of CT-based and C-arm-based navigation. The intra-operative, automatic segmentation of 3D fluoroscopy datasets enables the combined visualization of surgical instruments and anatomical structures

Imaging with Flat-Detector C-Arm Systems

by N. Strobel, O. Meissner, J. Boese, T. Brunner, B. Heigl, M. Hoheisel, G. Lauritsch, M. Pfister, E. -p. Rührnschopf, B. Scholz, B. Schreiber, M. Spahn, M. Zellerhoff, Martin Hoheisel, Günter Lauritsch, Markus Nagel, Marcus Pfister, Ernst-peter Rührnschopf, Bernhard Scholz, Bernd Schreiber, Martin Spahn, Michael Zellerhoff, Klaus Klingenbeck-regn - Berlin / Heidelberg , 2009
"... Three-dimensional (3D) C-arm computed tomog-raphy is a new and innovative imaging technique. It uses two-dimensional (2D) X-ray projections acquired with a flat-panel detector C-arm angiog-raphy system to generate CT-like images. To this end, the C-arm system performs a sweep around the patient, acq ..."
Abstract - Cited by 4 (3 self) - Add to MetaCart
Three-dimensional (3D) C-arm computed tomog-raphy is a new and innovative imaging technique. It uses two-dimensional (2D) X-ray projections acquired with a flat-panel detector C-arm angiog-raphy system to generate CT-like images. To this end, the C-arm system performs a sweep around the patient

Effective One Step-iterative Fiducial Marker-based Compensation for Involuntary Motion in Weight-bearing C-arm Cone-beam CT Scanning of Knees

by Jang-hwan Choi, Andreas Maier, Martin Berger, Rebecca Fahrig
"... We previously introduced three different fiducial marker-based correction methods (2D projection shifting, 2D projection warping, and 3D image warping) for patients ’ involuntary motion in the lower body during weight-bearing C-arm CT scanning. The 3D warping method performed better than 2D methods ..."
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standing at various flexion angles were acquired using a C-arm cone-beam CT system with a flat panel. A horizontal scanning trajectory of the C-arm was calibrated to generate projection matrices. Using the projection matrices, the static reference marker coordinates in 3D were estimated and used

Registration-Free Laparoscope Augmentation for Intra-Operative Liver Resection Planning

by Marco Feuerstein A, Thomas Mussack B, Ro M. Heining B, Nassir Navab A
"... In recent years, an increasing number of liver tumor indications were treated by minimally invasive laparoscopic resection. Besides the restricted view, a major issue in laparoscopic liver resection is the enhanced visualization of (hidden) vessels, which supply the tumorous liver segment and thus n ..."
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can be gated and synchronized intra-operatively, motion caused by pneumoperitoneum is individual for every patient and difficult to estimate. Therefore, we propose to use an optically tracked mobile C-arm providing cone-beam CT imaging capability intraoperatively. The C-arm is able to visualize soft

Dynamic Dosimetry and Edema Detection in Prostate Brachytherapy -a Complete System

by A Jain , A Deguet , I Iordachita , G Chintalapani , J Blevins , Y Le , E Armour , C Burdette , D Song , G Fichtinger
"... ABSTRACT Purpose: Brachytherapy (radioactive seed insertion) has emerged as one of the most effective treatment options for patients with prostate cancer, with the added benefit of a convenient outpatient procedure. The main limitation in contemporary brachytherapy is faulty seed placement, predomi ..."
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in prostate brachytherapy requires localization of inserted radioactive seeds relative to the prostate. Seeds were reconstructed using a typical non-isocentric C-arm, and exported to a commercial brachytherapy delivery system. Technical obstacles for 3D reconstruction on a nonisocentric C-arm include pose

Robust Model-based 3D/3D Fusion using Sparse Matching for Minimally Invasive Surgery

by Dominik Neumann, Sasa Grbic, Matthias John, Nassir Navab, Joachim Hornegger, Razvan Ionasec
"... Abstract. Classical surgery is being disrupted by minimally invasive and transcatheter procedures. As there is no direct view or access to the affected anatomy, advanced imaging techniques such as 3D C-arm CT and C-arm fluoroscopy are routinely used for intra-operative guidance. However, intra-opera ..."
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Abstract. Classical surgery is being disrupted by minimally invasive and transcatheter procedures. As there is no direct view or access to the affected anatomy, advanced imaging techniques such as 3D C-arm CT and C-arm fluoroscopy are routinely used for intra-operative guidance. However, intra-operative

Intraoperative Laparoscope Augmentation for Port Placement and Resection Planning in Minimally

by Invasive Liver Resection, Marco Feuerstein, Thomas Mussack, Ro M. Heining, Nassir Navab
"... Abstract—In recent years, an increasing number of liver tumor indications were treated by minimally invasive laparoscopic resection. Besides the restricted view, two major intraoperative issues in laparoscopic liver resection are the optimal planning of ports as well as the enhanced visualization of ..."
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, preoperative imaging data can hardly be used. Instead, we propose to use an optically tracked mobile C-arm providing cone-beam CT imaging capability intraoperatively. After patient positioning, port placement, and carbon dioxide insufflation, the liver vessels are contrasted and a 3-D volume is reconstructed

Open Access Flap Decisions and Options in Soft Tissue Coverage of the Upper Limb

by Michelle Griffin, Ip Hindocha, Marco Malahias, Mohamed Saleh, Ali Juma
"... Abstract: Soft tissue deficiency in the upper limb is a common presentation following trauma, burns infection and tumour removal. Soft tissue coverage of the upper limb is a challenging problem for reconstructive surgeons to manage. The ultimate choice of soft tissue coverage will depend on the size ..."
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Abstract: Soft tissue deficiency in the upper limb is a common presentation following trauma, burns infection and tumour removal. Soft tissue coverage of the upper limb is a challenging problem for reconstructive surgeons to manage. The ultimate choice of soft tissue coverage will depend

1874-3250/09 2009 Bentham Open Open Access Early Weight Bearing of Calcaneal Fractures Treated by Intraoperative

by Locked-screw Plate Fixation, B. Kienast, J. Gille, C. Queitsch, R. Thietje, C. Juergens, A. P. Schulz
"... Abstract: Operative therapy of intraarticular fractures of the calcaneus is an established surgical standard. The aim is an accurate reduction of the fracture with reconstruction of Boehler’s angle, length, axis and subtalar joint surface. Intraoperative 3D-fluoroscopy with the Siremobil Iso-C 3D m ..."
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mobile C-arm system is a valuable assistant for accurate reconstruction of these anatomical structures. Remaining incongruities can be recognized and corrected intraoperatively. The achieved reduction can be fixed by the advantages of an internal fixator (locked-screw plate interface). In the period
Results 1 - 10 of 26