Ph.D. Gallery

Iterative Reconstruction Methods to Reduce Respiratory Motion Artifacts in Cartesian Coronary MRI Abstract Cardiovascular diseases and coronary artery disease (CAD) in particular are the leading cause of death in most developed countries worldwide. Although CAD progresses slowly over several...

Motion Correction and Signal Enhancement in Optical Coherence Tomography Abstract Optical Coherence Tomography (OCT) is a non-invasive optical imaging modality with micron scale resolution and the ability to generate 2D and 3D images of the human retina. OCT has found widespread use in oph...

Automatic Assessment of Prosody in Second Language Learning Abstract The present thesis studies methods for automatically assessing the prosody of non-native speakers for the purpose of computer-assisted pronunciation training. We study the detection of word accent errors, and the general as...

MR-Based Attenuation Correction for PET/MR Hybrid Imaging Abstract The recent and successful integration of positron emission tomography (PET) and magnetic resonance imaging (MRI) modalities in one device has gained wide attention. This new hybrid imaging modality now makes it possible to im...

Automatic Unstained Cell Detection in Bright Field Microscopy Abstract Bright field microscopy is preferred over other microscopic imaging modalities whenever ease of implementation and minimization of expenditure are main concerns. This simplicity in hardware comes at the cost of image qual...

Cell Culture Monitoring with Novel Bright Field Miniature Microscopy Prototypes Abstract Cell cultures are monitored to develop new drugs, to find efficient ways to produce vaccines and to perform toxicity tests. The cells are cultivated in an incubator and the monitoring steps such as the a...

Motion-Corrected Reconstruction in Cone-Beam Computed Tomography for Knees under Weight-Bearing Condition Abstract Medical imaging plays an important role in diagnosis and grading of knee conditions such as osteoarthritis. In current clinical practice, 2-D radiography is regularly applied u...

Evaluation Methods for Stereopsis Performance Abstract Stereopsis is one mechanism of visual depth perception, which gains 3D information from the displaced images of both eyes. Depth is encoded by disparity, the offset between the corresponding projections of one point in both retinas. Play...

Hybrid RGB/Time-of-Flight Sensors in Minimally Invasive Surgery Abstract Nowadays, minimally invasive surgery is an essential part of medical interventions. In a typical clinical workflow, procedures are planned preoperatively with 3-dimensional (3-D) computed tomography (CT) data and guid...

Region-of-Interest Imaging with C-arm Computed Tomography Abstract C-arm based flat-detector computed tomography (FDCT) is a promising approach for neurovascular diagnosis and intervention since it facilitates proper analysis of surgical implants and intra-procedural guidance. In the majority...