A5043524976- Characterization and Applications of Magnetic Nanoparticles
- Geomagnetism and Paleomagnetism Studies
- Electrical and Bioimpedance Tomography
- Minerals Flotation and Separation Techniques
- Optical Coherence Tomography Applications
- Body Contouring and Surgery
- Thermoregulation and physiological responses
- Retinal Imaging and Analysis
- Advanced X-ray and CT Imaging
- Magnetic Properties and Applications
- Cardiovascular Health and Disease Prevention
- Magnetic Field Sensors Techniques
- Atomic and Subatomic Physics Research
- Diabetic Foot Ulcer Assessment and Management
- Sparse and Compressive Sensing Techniques
- Nuclear Physics and Applications
- Textile materials and evaluations
- Glaucoma and retinal disorders
- Medical Imaging Techniques and Applications
- Microfluidic and Bio-sensing Technologies
University of Lübeck
2018-2024
Optical coherence tomography (OCT) enables the non-invasive acquisition of high-resolution three-dimensional cross-sectional images at micrometer scale and is mainly used in field ophthalmology for diagnosis as well monitoring eye diseases. Also other areas, such dermatology, OCT already established. Due to its nature, also employed research studies involving animal models. Manual evaluation models a challenging task due lack imaging standards varying anatomy among In this paper, we present...
Magnetic Particle Imaging is a tomographic imaging technique that measures the voltage induced due to magnetization changes of magnetic nanoparticle distributions. The relationship between received signal and distribution nanoparticels described by system function. A common method for image reconstruction using measured function create matrix set up regularized linear equations. Since measurement time-consuming, different methods acceleration have been proposed. These include modeling or...
Magnetic particle imaging is a tracer-based tomographic technique that allows the concentration of magnetic nanoparticles to be determined with high spatio-temporal resolution. To reconstruct an image tracer concentration, magnetization dynamics particles must accurately modeled. A popular ensemble model based on solving Fokker-Plank equation, taking into account either Brownian or N\'eel dynamics. The disadvantage this it computationally expensive due underlying stiff differential equation....
This work introduces a strategy for the extension of standard Kaczmarz algorithm, which is popular solving very large inverse problems, to priors other than commonly used Tikhonov regularization. The proposed reformulation algorithm allows us include more sophisticated while inheriting row-wise operation structure classical algorithm. new method developed with help alternating direction multipliers. results show that also suboptimal multiplier steps, able solve convex optimization problems...
Cryolipolysis is a well-established cosmetic procedure for non-invasive local fat reduction. This technique selectively destroys subcutaneous cells using controlled cooling. Thickness measurements of were conducted mouse model. For detailed examination skin optical coherence tomography (OCT) was performed, which imaging modality. Due to high number image slices manual delineation not feasible. Therefore, automatic segmentation algorithms are required. In this work an algorithm the 3D layer...
In a recent publication, based on the Langevin model, exact mathematical relationship between system function and tensor products of Chebyshev polynomials second kind has been derived for case in which multidimensional excitation is used magnetic particle imaging. There, new expression imaging was derived. To make this representation easily accessible, present paper focusses more practical aspects theory without going deep into proofs. particular, we examine contribution mixing factors to...
This publication proposes for the first time a direct reconstruction technique based on weighted Bessel functions of kind. As basis formulation well-known Chebyshev is used. By utilizing Fourier transform polynomials second kind, which nothing else than function new allows particle distribution in domain derived. method comes with benefit allowing deconvolution frequency domain. With numerical simulations we show equivalence to and demonstrate different strategies perform...
In Magnetic Particle Imaging, the behavior of system matrix energy in dependence frequency components has been investigated and relations have observed. Due to lack a closed-form expression for 2- or 3-dimensional function, no obtained thus far. this work, we use recently found 2-dimensional function derive an upper bound as components. The comparison with simulated confirms results. Int. J. Mag. Part. Imag. 6(2), Suppl. 1, 2020, Article ID: 2009018, DOI: 10.18416/IJMPI.2020.2009018