TY  - JOUR
AU  - Poulen, Gaetan
AU  - Chan Seng, Emilie
AU  - Menjot De Champfleur, Nicolas
AU  - Cif, Laura
AU  - Cyprien, Fabienne
AU  - Perez, Jerome
AU  - Coubes, Philippe
TI  - Comparison between 1.5-and 3-T Magnetic Resonance Acquisitions for Direct Targeting Stereotactic Procedures for Deep Brain Stimulation: A Phantom Study
JF  - STEREOTACTIC AND FUNCTIONAL NEUROSURGERY
J2  - STEREOT FUNCT NEUROS
VL  - 98
PY  - 2020
IS  - 5
SP  - 337
EP  - 344
PG  - 8
SN  - 1011-6125
DO  - 10.1159/000509303
UR  - https://m2.mtmt.hu/api/publication/31726344
ID  - 31726344
AB  - Introduction:Deep brain stimulation (DBS) is a well-established treatment for movement disorders. High magnetic fields could have an impact on distortion. We evaluated 1.5- and 3-T magnetic resonance imaging (MRI) sequences for accuracy, precision, and trueness of our MRI-guided direct targeting protocol.Methods:Effects of distortion on MR sequences (T1- and T2-weighted sequences) can be evaluated using a dedicated phantom (Elekta). Field strength capabilities were assessed on Siemens Avanto (1.5 T) and Skyra (3 T) scanners. We assessed the precision of our stereotactic MRI-guided procedure.Results:We focused on the risk of error due to a high field strength. Error values on the localizer box were between 0.4 and 0.7 mm at 1.5 T and between 0.6 and 2 mm at 3 T. The most accurate 1.5-T sequence is the 3D FLASH T1-weighted sequence, which had an accuracy value of 0.6 mm. At 3 T, the accuracy value of the isotropic 3D FLASH T1-weighted sequence was 1.6 mm.Conclusion:Given the millimetric size of stereotactic targets and electrodes, lead implantation for neuromodulation therapy needs to be accurate. We demonstrate that 3-T imaging could not be used for stereotaxy in our MRI-guided direct targeting protocol because of a risk of error induced by distortion.
LA  - English
DB  - MTMT
ER  -