以Ge-68勻質假體評估從 μ map修正 PET//MRI 金屬假影之可行性

Use the Ge-68 Uniform Phantom to Evaluate the Feasibility of Fix the μ map to Correct the PET/MRI Metal Artifacts

10.6717/JTMRT.201609_4(2).0001

吳志毅(Camus C.Y. Wu)

順磁性 ； MR 衰減校正（MRAC） ； 衰減校正圖譜（μ map） ； Paramagnetic ； MR attenuation correction (MRAC) ； attenuation correction map (μ map)

臺灣醫事放射期刊

4卷2期（2016 / 09 / 01）

1 - 6

繁體中文

順磁性金屬會造成磁場不均勻導致無法在MRI 中產生訊號，而這樣的情形會致使PET/MRI 的MR 衰減校正（MRAC）發生異常，進而影響PET 影像的正確性。本實驗即以Ge-68 勻質假體製作缺損的衰減校正圖譜（μ map），藉由修正μ map 來嘗試解決PET影像異常缺損的可能性，並就此方法進行相關討論與經驗分享。

Paramagnetic metal can cause non-uniform magnetic field and lose the signal in MRI, Also this could cause the MR attenuation correction (MRAC) failed in PET / MRI, and affecting the PET image of PET/MRI. This literature is based on the combined discussion to introduce and to share our experience about use the Ge-68 uniform phantom to simulate a defect attenuation correction map (μ map), then try to fix the defects and the use the corrected μ map to retro recon a new PET images to resolve the abnormal defects.