An in vitro study at low field for MR guidance of a biopsy needle |
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| Institution: | 2. UQ Centre for Clinical Research, Asia-Pacific Centre for Neuromodulation, The University of Queensland, Herston, Queensland, Australia;3. Australian School of Advanced Medicine, Macquarie University, North Ryde, New South Wales, Australia;1. The Veterans Affairs Western New York Healthcare System, Western New York, Buffalo, NY 14215–1199, USA;2. Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, University at Buffalo School of Medicine and Biomedical Sciences, Buffalo, NY 14260, USA;3. Department of Anesthesiology, University at Buffalo School of Medicine and Biomedical Sciences, Buffalo, NY 14260, USA;4. Department of Social Preventive Medicine, University at Buffalo School of Medicine Biomedical Sciences, Buffalo, NY 14214, USA;1. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Haidian District, Beijing 100085, PR China;2. Benxi Institute for Drug Control, No.31 Shengli Road, Mingshan District, Benxi 117000, PR China |
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| Abstract: | 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 Bo 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. |
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