Can magnetic resonance imaging after cranioplasty using titanium mesh detect brain tumors?

Yasuo Takatsu, Rei Yoshida, Yuya Yamatani, Mikihisa Kanno, Tosiaki Miyati

研究成果: ジャーナルへの寄稿学術論文査読


This study determined the dependence of the concentration and position of contrast-enhanced tumors on the radio frequency (RF)-shielding effect of titanium mesh using the contrast-to-noise ratio (CNR) in magnetic resonance imaging (MRI). A phantom was constructed by filling a plastic container with manganese chloride tetrahydrate and agar. Four cellophane cylindrical containers were arranged from the end of the plastic container, and the brain tumor model was filled with gadobutrol diluted with NaCl, with molarity values of 0.2–1.0 mmol/L. The titanium mesh board was set on the left side of the phantom. Images were acquired using a 1.5-T MRI as well as two-dimensional spin-echo (2D SE) and three-dimensional fast spoiled gradient echo (3D FSPGR) sequences. CNR was calculated using the signal intensity values of the tumor model, surrounding area of the brain model, and background noise. Furthermore, the fractional change in CNR was calculated using values of CNR with and without the mesh. Moreover, a profile of CNR was created. The fractional change in CNR decreased at the brain tumor positions present near the mesh and at a contrast medium concentration of approximately ≤ 0.5 mmol/L in 2D SE and ≤ 0.25 mmol/L in 3D FSPGR. According to the CNR profiles, directly under the mesh, almost all contrast concentrations in 2D SE was unrecognizable; however, at a concentration of ≥ 0.5 mmol/L in 3D FSPGR was recognizable.

ジャーナルPhysical and Engineering Sciences in Medicine
出版ステータス出版済み - 03-2023

All Science Journal Classification (ASJC) codes

  • バイオテクノロジー
  • 放射線技術および超音波技術
  • 生物理学
  • 生体医工学
  • 器械工学
  • 放射線学、核医学およびイメージング


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