Using a modified 3D-printer for mapping the magnetic field of RF coils designed for fetal and neonatal imaging
(2016) In Journal of Magnetic Resonance 269. p.146-151- Abstract
An experimental setup for characterizing the magnetic field of MRI RF coils was proposed and tested. The setup consisted of a specially configured 3D-printer, a network analyzer and a mid-performance desktop PC. The setup was tested on a single loop RF coil, part of a phased array for fetal imaging. Then, the setup was used for determining the magnetic field characteristics of a high-pass birdcage coil used for neonatal MR imaging with a vertical static field. The scattering parameter S21, converted into power ratio, was used for mapping the B1 magnetic field. The experimental measurements from the loop coil were close to the theoretical results (R = 0.924). A high degree of homogeneity was measured for the neonatal birdcage... (More)
An experimental setup for characterizing the magnetic field of MRI RF coils was proposed and tested. The setup consisted of a specially configured 3D-printer, a network analyzer and a mid-performance desktop PC. The setup was tested on a single loop RF coil, part of a phased array for fetal imaging. Then, the setup was used for determining the magnetic field characteristics of a high-pass birdcage coil used for neonatal MR imaging with a vertical static field. The scattering parameter S21, converted into power ratio, was used for mapping the B1 magnetic field. The experimental measurements from the loop coil were close to the theoretical results (R = 0.924). A high degree of homogeneity was measured for the neonatal birdcage RF coil. The development of MR RF coils is time consuming and resource intensive. The proposed experimental setup provides an alternative method for magnetic field characterization of RF coils used in MRI.
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- author
- Vavoulas, Alexander ; Vaiopoulos, Nicholas ; Hedström, Erik LU ; Xanthis, Christos G. LU ; Sandalidis, Harilaos G. and Aletras, Anthony H. LU
- organization
- publishing date
- 2016-08-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Helmholtz condition, Helmholtz pair, MRI, RF coil design, Volume coil
- in
- Journal of Magnetic Resonance
- volume
- 269
- pages
- 6 pages
- publisher
- Academic Press
- external identifiers
-
- pmid:27310429
- wos:000381239900017
- scopus:84974704955
- ISSN
- 1090-7807
- DOI
- 10.1016/j.jmr.2016.06.005
- language
- English
- LU publication?
- yes
- id
- a1f0fdd2-1b7f-4d03-8b5b-8d6561242246
- date added to LUP
- 2016-12-14 11:15:06
- date last changed
- 2024-03-22 14:09:41
@article{a1f0fdd2-1b7f-4d03-8b5b-8d6561242246, abstract = {{<p>An experimental setup for characterizing the magnetic field of MRI RF coils was proposed and tested. The setup consisted of a specially configured 3D-printer, a network analyzer and a mid-performance desktop PC. The setup was tested on a single loop RF coil, part of a phased array for fetal imaging. Then, the setup was used for determining the magnetic field characteristics of a high-pass birdcage coil used for neonatal MR imaging with a vertical static field. The scattering parameter S21, converted into power ratio, was used for mapping the B<sub>1</sub> magnetic field. The experimental measurements from the loop coil were close to the theoretical results (R = 0.924). A high degree of homogeneity was measured for the neonatal birdcage RF coil. The development of MR RF coils is time consuming and resource intensive. The proposed experimental setup provides an alternative method for magnetic field characterization of RF coils used in MRI.</p>}}, author = {{Vavoulas, Alexander and Vaiopoulos, Nicholas and Hedström, Erik and Xanthis, Christos G. and Sandalidis, Harilaos G. and Aletras, Anthony H.}}, issn = {{1090-7807}}, keywords = {{Helmholtz condition; Helmholtz pair; MRI; RF coil design; Volume coil}}, language = {{eng}}, month = {{08}}, pages = {{146--151}}, publisher = {{Academic Press}}, series = {{Journal of Magnetic Resonance}}, title = {{Using a modified 3D-printer for mapping the magnetic field of RF coils designed for fetal and neonatal imaging}}, url = {{http://dx.doi.org/10.1016/j.jmr.2016.06.005}}, doi = {{10.1016/j.jmr.2016.06.005}}, volume = {{269}}, year = {{2016}}, }