Arbogast-Ravier S, Gangi A, Choquet P, Brunot B, Constantinesco A
Laboratoire de Biomécanique, CHU Hautepierre, Strasbourg, France.
Magn Reson Imaging. 1995;13(2):321-4. doi: 10.1016/0730-725x(94)00103-a.
The aim of this study is to demonstrate in vitro that low field strength can be used for MR interventional procedures. At 0.1 T, we developed 3D, T1-, and T2-weighted fast steady state sequences and measured the artifact created by an MR biopsy needle (22 gauge, 0.7 mm diameter) on a bicompartmental phantom. The artifact generated by the needle placed perpendicular to B0 did not exceed 3.6 mm for 3D steady state sequences and acquisition times reaching 1.5 s. Corresponding artifacts at higher field strength were 7.6 mm for 0.5 T and 8.6 mm for 1 T. Low field MRI proved to be potentially adaptable for the guidance of MR biopsy needles.
本研究的目的是在体外证明低场强可用于磁共振介入手术。在0.1T时，我们开发了三维、T1加权和T2加权快速稳态序列，并在双腔模型上测量了磁共振活检针（22号，直径0.7mm）产生的伪影。对于三维稳态序列和采集时间达1.5s的情况，垂直于B0放置的针产生的伪影不超过3.6mm。在较高场强下，0.5T时相应的伪影为7.6mm，1T时为8.6mm。低场磁共振成像被证明有可能适用于磁共振活检针的引导。
