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題 名 | 以釓顯影磁振造影測試氫氧磷灰石珊瑚人工眼球植入後血管生成之評估=Gadolinium-Enhaned Magnatic Resonance Imaging for Assessment of Vascularization of the Coralline Hydroxyapatite Orbital Implant |
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作 者 | 羅煥鉅; 陳建同; 李超群; | 書刊名 | 中華放射線醫學雜誌 |
卷 期 | 27:1 2002.02[民91.02] |
頁 次 | 頁1-7 |
分類號 | 416.703 |
關鍵詞 | 磁振造影; 釓顯影; 氫氧磷灰石; 人工眼球; Magnetic resonance imaging; Gadolinium; Hydroxyapatite; Orbital implant; |
語 文 | 中文(Chinese) |
中文摘要 | 本文目的是使用釓顯影磁振造影評估氫氧磷灰石珊瑚人工眼球植入術後血管生成之情形。珊瑚氫氧磷灰石足夠有效之血管生成為植入眼球成功之保證。本研究共收集18位接受眼球摘除術後並植入氫氧磷灰石珊瑚人工眼球,術後6個月接受釓顯影磁振造影。回溯性評估顯影型態,與隨後鑽孔所得血管生成結果互相比較。橫向釓顯影T1weighted影像顯示氫氧磷灰石珊瑚人工眼球在6個月時,不同程度之前位、後拉及中央顯影。鑽孔出血良好者為中央及後位周邊顯影,顯影強度平均差大於50以上的顯影面積大於百分之三十一者。磁振造影可確認氫氧磷灰石人工眼球之纖維血管生成,提供臨床醫師做為鑽孔手術適當時機之重要參考依據,避免無血性鑽孔,減少併發罹病率。 |
英文摘要 | Our purpose was to assess the utility of gadolinium-enhanced magnetic resonance imaging to evaluate postsurgical assessment of integrated orbital implant composed of a porous calcium phosphate hydroxyapatite substrate and enhanced pattern of this fibrovascular ingrowth, which has been histologically documented. Successful prosthesis attachment depends on complete vascularization of porous coralline hydroxyapatite when it is used as an orbital implant. We studied 18 patients age who underwent enucleation and implantation of a hydroxyapatite ball; 6 months after surgery, each patient was examined by spinecho MRI, with gadolinium enhancement. Retrospective evaluation of the enhancement patterns was performed. Final drilling for prosthesis fixation in all patients. RESULTS: Gadolinium-enhanced T1-weighted sequences consistently demonstrated centrally advancing, peripheral enhancement centered on the drilled access channels. Fibrovascular ingrowth was demonstrated in all 18 patients as areas of enhancement at the periphery of the hydroxyapatite sphere that extended to the anterior, posterior and center to a variable degree. The good result of drilling followed by central and posteior enhanced location, enhanced intensity mean more than 50 and enhanced area more than 31%. Magnetic resonance imaging can identify progression of fibrovascular ingrowth into the hydroxyapatite orbital implants and guide surgical planning. It may also identify implants that fail to vascularize, thereby preventing the morbidity encountered by drilling into an avascular hydroxyapatite implant. The radiologist should aware of the MRI appearances of the coralline hydroxyapatite orbital implant since it is now widely used following enucleation. Magnetic resonance imaging enhancement patterns guided timing of final drilling for prosthesis fixation. MRI is a useful means to determine successful incorporation of the substrate into the orbital tissues. |
本系統中英文摘要資訊取自各篇刊載內容。