Papers by Joachim Georgii
IEEE transactions on bio-medical engineering, 2017
Focused ultrasound (FUS) is rapidly gaining clinical acceptance for several target tissues in the... more Focused ultrasound (FUS) is rapidly gaining clinical acceptance for several target tissues in the human body. Yet, treating liver targets is not clinically applied due to a high complexity of the procedure (noninvasiveness, target motion, complex anatomy, blood cooling effects, shielding by ribs, and limited image-based monitoring). To reduce the complexity, numerical FUS simulations can be utilized for both treatment planning and execution. These use-cases demand highly accurate and computationally efficient simulations. We propose a numerical method for the simulation of abdominal FUS treatments during respiratory motion of the organs and target. Especially, a novel approach is proposed to simulate the heating during motion by solving Pennes' bioheat equation in a computational reference space, i.e., the equation is mathematically transformed to the reference. The approach allows for motion discontinuities, e.g., the sliding of the liver along the abdominal wall. Implementing ...
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Medical Imaging 2016: Computer-Aided Diagnosis, 2016
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Lecture Notes in Computer Science, 2016
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ABSTRACT Conformal External Beam Radiotherapy (EBRT) and High Intensity Focused Ultrasound (HIFU)... more ABSTRACT Conformal External Beam Radiotherapy (EBRT) and High Intensity Focused Ultrasound (HIFU) are important weapons in oncology, but both suffer from inherent limitations. Their combination (FUS/RT) can overcome these difficulties and, possibly, be more effective than the simple addition of the two techniques. This is a first attempt to simulate the HIFU-Hyperthermia field around an ablated region and evaluate the potential enhancement effect on EBRT.
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Vmv, 2009
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International Journal of Computer Assisted Radiology and Surgery
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... 200,000 el-ements can be simulated at a rate of 10 time steps per second. ... Al-though many ... more ... 200,000 el-ements can be simulated at a rate of 10 time steps per second. ... Al-though many papers have been published in this area, a large majority of ... Framework for Real-Time Simulation ofDeformable Volumes [GW05a,GW06a] Interactive GPU-based Collision Detection ...
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Electronic transactions on numerical analysis ETNA
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Journal of Therapeutic Ultrasound, 2014
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Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 2009
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PURPOSE/AIM Due to the 3D nature of tomosynthesis, manual position correlation between different ... more PURPOSE/AIM Due to the 3D nature of tomosynthesis, manual position correlation between different acquisitions is time expensive and requires complex thinking. We show how our automatic real-time position correlation method can facilitate comparison between different tomosnythesis images as well as mammograms. CONTENT ORGANIZATION Our workstation features sets of two tomosynthesis images of the same patient acquired at different angles. The user can view both 3D images without our method being active to illustrate the difficulties of manually correlating finding positions between views. If our method is active, the users selected position in one view will automatically and in real-time be correlated to a position in the other view. Additionally, the correlation from one tomosynthesis image to the same patients mammograms (acquired with different compressions or at different angles) is also supported and shown. SUMMARY The presented workstation will show the difficulties of manual cor...
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PURPOSE/AIM Tomosynthesis in combination with the 3D breast ultrasound modality ABVS (automated b... more PURPOSE/AIM Tomosynthesis in combination with the 3D breast ultrasound modality ABVS (automated breast volume scanner) has the potential to increase the diagnostic accuracy of breast cancer detection and diagnosis by correlating findings in both modalities. However, the manual position correlation between these differently and highly deformed 3D images is time-expensive and requires complex thinking. We will show how our automatic real-time position correlation method can support the simultaneous navigation of these different datasets. CONTENT ORGANIZATION The presented workstation will simultaneously show a patients tomosynthesis and 3D ultrasound image. When the user navigates through one of the images with a cursor position, our method will automatically show the correlated cursor position in the other view. Additionally, the user has the option to deactivate the automatic method, which will illustrate the difficulties of manually correlatig corrsponding positions in these images...
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Papers by Joachim Georgii