Simultaneous imaging of hard and soft biological tissues in a low-field dental MRI scanner

Autor: D. Grau-Ruiz, Eduardo Pallas, José Manuel Rodríguez González, C. Gramage, Elena Diaz-Caballero, J. P. Rigla, Fernando Galve, R. Bosch, J. Alonso, Alfonso Rios, Miguel Corberán, Santiago Aja-Fernández, Jose M. Benlloch, Jose M. Algarin, J. Borreguero
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Scanner
Physics - Instrumentation and Detectors
Field (physics)
Computer science
Science
FOS: Physical sciences
Iterative reconstruction
Noise (electronics)
Article
030218 nuclear medicine & medical imaging
03 medical and health sciences
symbols.namesake
Imaging
Three-Dimensional
0302 clinical medicine
FOS: Electrical engineering
electronic engineering
information engineering
medicine
Animals
Humans
Femur
Multidisciplinary
medicine.diagnostic_test
Image and Video Processing (eess.IV)
Skull
Magnetic resonance imaging
Instrumentation and Detectors (physics.ins-det)
Equipment Design
030206 dentistry
Electrical Engineering and Systems Science - Image and Video Processing
Magnetic Resonance Imaging
Physics - Medical Physics
Electrical and electronic engineering
3. Good health
Fourier transform
symbols
Spin echo
Medicine
Cattle
Medical Physics (physics.med-ph)
Rabbits
Biomedical engineering
Head
Tooth
Zdroj: Scientific Reports
Scientific Reports, Vol 10, Iss 1, Pp 1-14 (2020)
RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
instname
Popis: Magnetic Resonance Imaging (MRI) of hard biological tissues is challenging due to the fleeting lifetime and low strength of their response to resonant stimuli, especially at low magnetic fields. Consequently, the impact of MRI on some medical applications, such as dentistry, continues to be limited. Here, we present three-dimensional reconstructions of ex-vivo human teeth, as well as a rabbit head and part of a cow femur, all obtained at a field strength of only 260 mT. These images are the first featuring soft and hard tissues simultaneously at sub-Tesla fields, and they have been acquired in a home-made, special-purpose, pre-medical MRI scanner designed with the goal of demonstrating dental imaging at low field settings. We encode spatial information with two variations of zero-echo time (ZTE) pulse sequences: Pointwise-Encoding Time reduction with Radial Acquisition (PETRA) and a new sequence we have called Double Radial Non-Stop Spin Echo (DRaNSSE), which we find to perform better than the former. For image reconstruction we employ Algebraic Reconstruction Techniques (ART) as well as standard Fourier methods. A noise analysis of the resulting images shows that ART reconstructions exhibit a higher signal to noise ratio with a more homogeneous noise distribution.
12 pages, comments welcome
Databáze: OpenAIRE
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