Abstract #2361
Evaluation of respiration-induced magnetic field disturbance correction of MR thermometry in volunteers and in patients for MR-HIFU ablation of breast cancer: the effects of conscious sedation
Roel Deckers 1 , Baudouin Denis de Senneville 1,2 , Gerald Schubert 3 , Laura G. Merckel 1 , H. H.B. Vaessen 4 , Maurice A.A.J. van den Bosch 1 , Chrit T.W. Moonen 1 , and Lambertus W. Bartels 1
1
Imaging Division, University Medical Center
Utrecht, Utrecht, Utrecht, Netherlands,
2
IMB,
UMR 5251 CNRS/Universit Bordeaux 1/INRIA, France,
3
Philips
Healthcare, Vantaa, Finland,
4
Department
of Anesthesia, University Medical Center Utrecht,
Utrecht, Utrecht, Netherlands
When using PRFS-based MR thermometry for temperature
monitoring respiration induced magnetic field
fluctuations can cause significant temperature errors
for organs close to the lungs such as the breast. Here
we evaluate the performance of a LUT-based and a
model-based correction method for MR thermometry in
healthy free-breathing volunteers and in breast cancer
patients under conscious sedation. Both methods showed
significantly improved temperature precision compared to
the uncorrected case for volunteers. In contrast, in
patients both correction methods resulted only in minor
or no improvement of the temperature precision. In
conclusion, conscious sedation improved the quality of
MR thermometry.
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