@article {Marker2017, title = {1.5 Tesla augmented reality navigated interventional magnetic resonance imaging: paravertebral sympathetic plexus injections}, journal = {Diagnostic and Interventional Radiology}, year = {In Press}, month = {01/2017}, author = {David R. Marker and Paweena U-Thainual and Tamas Ungi and Aaron J Flammang and Gabor Fichtinger and Iulian Iordachita and John A Carrino and Jan Fritz} } @conference {Wiercigroch2019, title = {Validation of a low-cost adjustable, handheld needle guide for spine interventions}, booktitle = {SPIE Medical Imaging 2019: Image-Guided Procedures, Robotic Interventions, and Modeling}, volume = {10951}, year = {2019}, month = {03/2019}, address = {San Diego, California}, keywords = {3D printing, MR-guided, needle guidance, spinal injection}, author = {Wiercigroch, Julia and Zachary M C Baum and Tamas Ungi and Jan Fritz and Gabor Fichtinger} } @article {Marker2016, title = {MR-guided perineural injection of the ganglion impar: technical considerations and feasibility}, journal = {Skeletal Radiology}, year = {2016}, month = {01/2016}, abstract = {

Objective

Perineural ganglion impar injections are used in the management of pelvic pain syndromes; however, there is no consensus regarding the optimal image guidance. Magnetic resonance imaging (MRI) provides high soft tissue contrast and the potential to directly visualize and target the ganglion. The purpose of this study was to assess the feasibility of MR-guided percutaneous perineural ganglion impar injections.

Materials and methods

Six MR-guided ganglion impar injections were performed in six human cadavers. Procedures were performed with a clinical 1.5-Tesla MRI system through a far lateral transgluteus approach. Ganglion impar visibility, distance from the sacrococcygeal joint, number of intermittent MRI control steps required to place the needle, target error between the intended and final needle tip location, inadvertent punctures of non-targeted vulnerable structures, injectant distribution, and procedure time were determined.

Results

The ganglion impar was seen on MRI in 4/6 (66\ \%) of cases and located 0.8\ mm cephalad to 16.3\ mm caudad (average 1.2\ mm caudad) to the midpoint of the sacrococcygeal joint. Needle placement required an average of three MRI control steps (range, 2{\textendash}6). The average target error was 2.2 {\textpm} 2.1\ mm. In 6/6 cases (100\ \%), there was appropriate periganglionic distribution and filling of the presacrococcygeal space. No punctures of non-targeted structures occurred. The median procedure time was 20\ min (range, 12{\textendash}29\ min).

Conclusion

Interventional MRI can visualize and directly target the ganglion impar for accurate needle placement and successful periganglionic injection with the additional benefit of no ionizing radiation exposure to patient and staff. Our results support clinical evaluation.

}, url = {http://dx.doi.org/10.1007/s00256-016-2333-7}, author = {David R. Marker and Paweena U-Thainual and Tamas Ungi and Aaron J Flammang and Gabor Fichtinger and Iulian Iordachita and John A Carrino and Jan Fritz} } @conference {Anand2014b, title = {Design and Development of a Mobile Image Overlay System for Image-Guided Needle Interventions}, booktitle = {36th Annual International Conference of IEEE EMBS}, year = {2014}, month = {Accepted}, publisher = {IEEE EMBS}, organization = {IEEE EMBS}, address = {Chicago, IL, USA}, author = {Manjunath Anand and Franklin King and Tamas Ungi and Andras Lasso and John Rudan and Jagadeesan Jayender and Jan Fritz and John A Carrino and Ferenc Jolesz and Gabor Fichtinger} } @article {Anand2014a, title = {Design of mobile image overlay system for image-guided interventions}, year = {2014}, month = {03/2014}, publisher = {ImNO}, address = {Toronto, Canada. March 24-25}, author = {Manjunath Anand and Franklin King and Tamas Ungi and Andras Lasso and John Rudan and Jagadeesan Jayender and Jan Fritz and Ferenc Jolesz and John A Carrino and Gabor Fichtinger} } @article {Fritz2014, title = {MR-Guided Vertebroplasty With Augmented Reality Image Overlay Navigation}, journal = {Cardiovasc Intervent Radiol}, year = {2014}, month = {04/2014}, doi = {10.1007/s00270-014-0885-2}, author = {Jan Fritz and Paweena U-Thainual and Tamas Ungi and Aaron J Flammang and Sudhir Kathuria and Gabor Fichtinger and Iulian Iordachita and John A Carrino} } @article {Fritz2013a, title = {Augmented reality visualisation using an image overlay system for MR-guided interventions: technical performance of spine injection procedures in human cadavers at 1.5 Tesla}, journal = {European Radiology}, volume = {23}, year = {2013}, month = {01/2013}, pages = {235-245}, issn = {0938-7994}, doi = {10.1007/s00330-012-2569-0}, url = {http://www.ncbi.nlm.nih.gov/pubmed/22797956}, author = {Jan Fritz and Paweena U-Thainual and Tamas Ungi and Aaron J Flammang and Gabor Fichtinger and Iulian Iordachita and John A Carrino} } @article {Fritz2013b, title = {Augmented Reality Visualization Using Image Overlay Technology for MR-Guided Interventions: Cadaveric Bone Biopsy at 1.5 T}, journal = {Investigative Radiology}, volume = {48}, number = {6}, year = {2013}, month = {06/2013}, keywords = {augmented reality, image overlay, interventional MR imaging, MR-guided, MRI guidance, MRI-guided bone biopsy, navigation, osscous biopsy}, url = {http://www.ncbi.nlm.nih.gov/pubmed/23328911}, author = {Jan Fritz and Paweena U-Thainual and Tamas Ungi and Aaron J Flammang and McCarthy, EF. and Gabor Fichtinger and Iulian Iordachita and John A Carrino} } @article {Anand2013a, title = {Mobile Image Overlay System for Image Guided Interventions}, year = {2013}, month = {03/2013}, address = {Washington DC, USA, March 21-23, 2013.}, keywords = {image guided interventions, mobile image overlay, needle placement interventions, percutaneous interventions, static image overlay}, author = {Manjunath Anand and Tamas Ungi and Andras Lasso and Paweena U-Thainual and Jagadeesan Jayender and Jan Fritz and John A Carrino and Ferenc Jolesz and Gabor Fichtinger} } @article {Anand2013c, title = {MOBILE IMAGE OVERLAY SYSTEM (MIOS) FOR IMAGE GUIDED INTERVENTIONS}, year = {2013}, month = {06/2013}, address = {Faculty of Health Sciences, Queen{\textquoteright}s University}, author = {Manjunath Anand and Tamas Ungi and Andras Lasso and Paweena U-Thainual and Jagadeesan Jayender and Jan Fritz and John A Carrino and Ferenc Jolesz and Gabor Fichtinger} } @article {U-Thainual2013a, title = {MR Image Overlay Adjustable Plane System for Musculoskeletal Interventions}, year = {2013}, address = {Toronto, Ontario, Canada, February 4-5, 2013}, keywords = {adjustable plane overlay system, augmented reality system, image overlay, MRI-guided}, author = {Paweena U-Thainual and Jan Fritz and Tamas Ungi and John A Carrino and Gabor Fichtinger and Iulian Iordachita} } @article {U-Thainual2013b, title = {MR image overlay guidance: system evaluation for preclinical use}, journal = {International Journal of Computer Assisted Radiology and Surgery}, volume = {8}, year = {2013}, month = {05/2013}, pages = {365-378}, issn = {1861-6410}, doi = {10.1007/s11548-012-0788-0}, author = {Paweena U-Thainual and Jan Fritz and Choladawan Moonjaita and Tamas Ungi and Aaron J Flammang and John A Carrino and Gabor Fichtinger and Iulian Iordachita} } @conference {Anand2013b, title = {Workspace Analysis and Calibration Method for Mobile Image Overlay System used for Image-Guided Interventions}, booktitle = {The Hamlyn Symposium on Medical Robotics - 2013}, year = {2013}, month = {06/2013}, author = {Manjunath Anand and Tamas Ungi and Andras Lasso and Paweena U-Thainual and Jagadeesan Jayender and Jan Fritz and John A Carrino and Ferenc Jolesz and Gabor Fichtinger} } @article {Fritz2012c, title = {Augmented Reality Visualization Using Image-Overlay for MR-guided Interventions: Performance Assessment of Paravertebral Sympathetic Perineural Injections in Cadavers at 1.5 Tesla}, year = {2012}, month = {06/2012}, pages = {S509-S511}, address = {Pisa, Italy, June 27-30}, author = {Jan Fritz and Paweena U-Thainual and Tamas Ungi and Aaron J Flammang and Gabor Fichtinger and Iulian Iordachita and John A Carrino} } @article {Fritz2012a, title = {Augmented Reality Visualization Using Image-Overlay for MR-Guided Interventions: Accuracy for Lumbar Spinal Procedures with a 1.5-Tesla MRI scanner.}, journal = {American Journal of Roentgenology}, volume = {198}, year = {2012}, month = {03/2012}, pages = {W266-73}, author = {Jan Fritz and Paweena U-Thainual and Tamas Ungi and Aaron J Flammang and Nathan Bongjoon Cho and Gabor Fichtinger and Iulian Iordachita and John A Carrino} } @article {Fritz2012b, title = {Augmented Reality Visualization with Use of Image Overlay Technology for MR Imaging{\textendash}guided Interventions: Assessment of Performance in Cadaveric Shoulder and Hip Arthrography at 1.5 T}, journal = {Radiology}, volume = {265}, number = {1}, year = {2012}, month = {10/2012}, pages = {254-259}, doi = {10.1148/radiol.12112640}, author = {Jan Fritz and Paweena U-Thainual and Tamas Ungi and Aaron J Flammang and Gabor Fichtinger and Iulian Iordachita and John A Carrino} } @article {U-Thainual2012a, title = {MR Image Overlay Guidance: System Evaluation for Clinical Use}, year = {2012}, month = {06/2012}, pages = {S179-S180}, address = {Pisa, Italy, June 27-30}, keywords = {augmented reality, image overlay, needle guidance, percutaneous interventions}, author = {Paweena U-Thainual and Jan Fritz and Choladawan Moonjaita and Tamas Ungi and Aaron J Flammang and John A Carrino and Gabor Fichtinger and Iulian Iordachita} } @article {Fritz2011, title = {Augmented reality visualization using image-overlay for MR-guided interventions: assessment of accuracy for lumbar spinal procedures with a 1.5-Tesla MRI scanner}, year = {2011}, month = {09/2011}, address = {Munich, Germany}, author = {Jan Fritz and Paweena U-Thainual and Tamas Ungi and Aaron J Flammang and Nathan Bongjoon Cho and Gabor Fichtinger and Iulian Iordachita and John A Carrino} } @conference {Fritz2011a, title = {Augmented Reality Visualization Using Image-overlay for MR-guided Interventions: Assessment of Performance in Cadaveric Shoulder and Hip Arthrography}, booktitle = {RSNA 97th Scientific Assembly and Annual Meeting}, year = {2011}, month = {07/2012}, address = {Chicago, IL}, doi = {10.1148/radiol.12112640}, url = {http://radiology.rsna.org/content/early/2012/07/24/radiol.12112640.abstract}, author = {Jan Fritz and Paweena U-Thainual and Tamas Ungi and Aaron J Flammang and Nathan Bongjoon Cho and Gabor Fichtinger and Iulian Iordachita and John A Carrino} } @article {U-Thainual2010, title = {Evaluation of accuracy and clinical feasibility of the MR-compatible image overlay}, year = {2010}, address = {Leipzig, Germany, September 24-25, 2010}, keywords = {augmented reality, Image overlay system, MRI-guided}, author = {Paweena U-Thainual and Jan Fritz and Nathan Bongjoon Cho and Tamas Ungi and Segundo, AJM and John A Carrino and Gabor Fichtinger and Lewin, JS and Iulian Iordachita} }