TY - GEN
T1 - Evaluation of Absorber Loading Effect on the Maximum Field Strength in an MRI Room
AU - Velez, Simon Rendon
AU - Aba, Ridvan
AU - Van Helvoort, Mark J.A.M.
AU - Vogt-Ardatjew, Robert
AU - Van Den Berg, Bärbel
AU - Leferink, Frank
N1 - Publisher Copyright:
© 2024 IEEE.
PY - 2024/10/25
Y1 - 2024/10/25
N2 - This paper evaluates the absorber loading effect on the maximum expected field strength variability in a 30 m3 MRI room. Loading an MRI room modifies two relevant parameters of the EMFs. First, adding RF absorbers reduces the variability of the maximum field strength. This improves the predictability of the EMFs generated in the room. Second, adding RF absorbers also introduces attenuation losses, which reduces the field strength. This reduction decreases the risk of generating unintentional electromagnetic interference. The field variability is evaluated through the average and minimal insertion loss of the room. The results reveal the difference in loss distribution between the MRI room and a VIRC, which acts as a reference electromagnetic environment. This reference is used to define the minimum amount of losses required to increase the IL of the MRI room. Additionally, the Q-factor of the MRI room is presented, which strengthens previous research findings, suggesting that an MRI room is similar to a heavily loaded reverberation chamber. These results are significant as reverberation chambers are rarely used to design MRIcompatible test setups.
AB - This paper evaluates the absorber loading effect on the maximum expected field strength variability in a 30 m3 MRI room. Loading an MRI room modifies two relevant parameters of the EMFs. First, adding RF absorbers reduces the variability of the maximum field strength. This improves the predictability of the EMFs generated in the room. Second, adding RF absorbers also introduces attenuation losses, which reduces the field strength. This reduction decreases the risk of generating unintentional electromagnetic interference. The field variability is evaluated through the average and minimal insertion loss of the room. The results reveal the difference in loss distribution between the MRI room and a VIRC, which acts as a reference electromagnetic environment. This reference is used to define the minimum amount of losses required to increase the IL of the MRI room. Additionally, the Q-factor of the MRI room is presented, which strengthens previous research findings, suggesting that an MRI room is similar to a heavily loaded reverberation chamber. These results are significant as reverberation chambers are rarely used to design MRIcompatible test setups.
KW - 2025 OA procedure
KW - losses distribution
KW - MR compatible
KW - MRI room
KW - overmoded
KW - Q-factor
KW - undermoded
KW - insertion loss
UR - https://www.scopus.com/pages/publications/85212224351
U2 - 10.1109/EMCEurope59828.2024.10722656
DO - 10.1109/EMCEurope59828.2024.10722656
M3 - Conference contribution
AN - SCOPUS:85212224351
T3 - Proceedings of the International Symposium on Electromagnetic Compatibility, EMC Europe
SP - 745
EP - 749
BT - 2024 International Symposium on Electromagnetic Compatibility – EMC Europe
T2 - International Symposium and Exhibition on Electromagnetic Compatibility, EMC Europe 2024
Y2 - 2 September 2024 through 5 September 2024
ER -