Q87100095
Dotaz
Zobrazit nápovědu
PURPOSE: Water removal is one of the computational bottlenecks in the processing of high-resolution MRSI data. The purpose of this work is to propose an approach to reduce the computing time required for water removal in large MRS data. METHODS: In this work, we describe a singular value decomposition-based approach that uses the partial position-time separability and the time-domain linear predictability of MRSI data to reduce the computational time required for water removal. Our approach arranges MRS signals in a Casorati matrix form, applies low-rank approximations utilizing singular value decomposition, removes residual water from the most prominent left-singular vectors, and finally reconstructs the water-free matrix using the processed left-singular vectors. RESULTS: We have demonstrated the effectiveness of our proposed algorithm for water removal using both simulated and in vivo data. The proposed algorithm encompasses a pip-installable tool ( https://pypi.org/project/CSVD/), available on GitHub ( https://github.com/amirshamaei/CSVD), empowering researchers to use it in future studies. Additionally, to further promote transparency and reproducibility, we provide comprehensive code for result replication. CONCLUSIONS: The findings of this study suggest that the proposed method is a promising alternative to existing water removal methods due to its low processing time and good performance in removing water signals.
Závěrečná zpráva o řešení grantu Interní grantové agentury MZ ČR
Přeruš. str. : il., tab. ; 31 cm
Cílem projektu je vyhodnotit chování dentálních slitin v magnetickém poli MR přístroje s ohledem na možná biologická rizika pro pacienty podstupující vyšetření metodou MR. Získané poznatky uspořádat formou doporučení do medicínské praxe.; The aim of project is to evaluate the reaction of dental alloys in the magnetic field of the MRI appliance and to estimate an eventual health risk of these stomatological metal objects present in the human body inserted in the magnetic field.
- MeSH
- biokompatibilní materiály analýza MeSH
- biomedicínské a zubní materiály analýza MeSH
- magnetická rezonanční tomografie škodlivé účinky MeSH
- Konspekt
- Stomatologie
- NLK Obory
- zubní lékařství
- radiologie, nukleární medicína a zobrazovací metody
- biomedicínské inženýrství
- NLK Publikační typ
- závěrečné zprávy o řešení grantu IGA MZ ČR
PURPOSE: The aim of this study is to design a method of myocardial T1 quantification in small laboratory animals and to investigate the effects of spatiotemporal regularization and the needed acquisition duration. METHODS: We propose a compressed-sensing approach to T1 quantification based on self-gated inversion-recovery radial two/three-dimensional (2D/3D) golden-angle stack-of-stars acquisition with image reconstruction performed using total-variation spatiotemporal regularization. The method was tested on a phantom and on a healthy rat, as well as on rats in a small myocardium-remodeling study. RESULTS: The results showed a good match of the T1 estimates with the results obtained using the ground-truth method on a phantom and with the literature values for rats myocardium. The proposed 2D and 3D methods showed significant differences between normal and remodeling myocardium groups for acquisition lengths down to approximately 5 and 15 min, respectively. CONCLUSIONS: A new 2D and 3D method for quantification of myocardial T1 in rats was proposed. We have shown the capability of both techniques to distinguish between normal and remodeling myocardial tissue. We have shown the effects of image-reconstruction regularization weights and acquisition length on the T1 estimates.
- MeSH
- fantomy radiodiagnostické MeSH
- krysa rodu rattus MeSH
- magnetická rezonanční tomografie metody MeSH
- myokard * MeSH
- počítačové zpracování obrazu metody MeSH
- reprodukovatelnost výsledků MeSH
- zobrazování trojrozměrné * metody MeSH
- zvířata MeSH
- Check Tag
- krysa rodu rattus MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- MeSH
- artefakty MeSH
- fantomy radiodiagnostické MeSH
- krysa rodu rattus MeSH
- magnetická rezonanční spektroskopie MeSH
- mozek anatomie a histologie MeSH
- počítačová simulace MeSH
- počítačové zpracování signálu MeSH
- software MeSH
- statistika jako téma MeSH
- zvířata MeSH
- Check Tag
- krysa rodu rattus MeSH
- zvířata MeSH
