Ph.D. Gallery

Artificial Intelligence based Methods for Atrial Fibrillation Ablation Procedures As one of the most common types of heart arrhythmias, atrial fibrillation is a severe disorder of the heart rhythm affecting the left atrium. Among the most serious complications count stroke and tachycardia mediat...

Model-Based and Data-Driven Geometry Alignment for Angiography Systems Tomography is the reconstruction of internal structures based on a sensory signal. X-ray cone-beam computed tomography (CBCT) measures the X-ray absorption with a source-detector gantry mounted on a C-shaped arm that rotates ...

Applications of Data Consistency Conditions in Cone-Beam Computed Tomography The mathematical model of computed tomography data acquisition shows that every such measurement contains a degree of redundancy. This redundancy can be used to formulate data consistency conditions which enable quantif...

Consistency Conditions, Compressed Sensing and Machine Learning for Limited Angle Tomography Cone-beam computed tomography (CBCT) is a widely used imaging technology for medical diagnosis and interventions nowadays. Compared with conventional 2-D X-ray images, 3-D volumes reconstructed by CBCT p...

Robust 2-D/3-D Registration for Real-Time Patient Motion Compensation In interventional radiology, preoperative 3-D images are usually fused with 2-D X-ray images. Fusion of 2-D/3-D images provides additional 3-D information during interventions and an accurate alignment between the 3-D and 2-D ...

Computer-aided Diagnosis for Magnetically Guided Capsule Endoscopy Digestive diseases and disorders are diverse with some being more common and of short duration, whereas others may be life threatening if left untreated. They are among the most common problems that people are afflicted with at l...

C-arm Cone-Beam Computed Tomography Reconstruction for Knee Imaging under Weight-Bearing Conditions Medical imaging is essential for the assessment of osteoarthritis and the overall knee health. For that purpose, radiographs of the knees of standing patients are acquired commonly. These suffer,...

Epipolar Consistency in Transmission Imaging Two X-ray projection images of a rigid object may have different points of view, yet redundant information can be identified in such images. Not unlike a checksum, these occur naturally in the data and are known as consistency conditions. Real acquisi...

Single photon emission computed tomography (SPECT) is a medical imaging modality used to visualize the distribution of radioactive tracers in a patient's body. While SPECT's utility as a diagnostic modality has long been established, its use for planning and managing nuclear medicine therapies has ...

Non-invasive imaging methods are capable of revealing content that is not visible with the naked eye. In this thesis, we present solutions for three common areas of application: digitization of cultural heritage, medicine, and quality assessment. The success story of those approaches is further...