Presentation 仙骨脊索腫重粒子線治療後、局所再発症例のMRI画像の検討

今井, 礼子

2017-04-17
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AbstractBackground and purpose: Since 1996 carbon ion radiotherapy (C-ion RT) for unresectable sarcomas has been organized and treated cases have been accumulated. The most major sarcoma treated with C-ion RT was sacral chordoma. This study aimed for investigating that the findings of MRI images after local recurrence predict prognosis.Material and Methods: Between 1996 and 2013, 188 sacral chordomas without prior surgery were treated with C-ion RT. Among 188 cases, 41 had local recurrence. We measured: A) the ratio of the lowest value in the recurrent tumor and the value in the muscle on T2WI images (A). B) the lowest value of recurrent tumor on the DWI images (B). We evaluated the correlation between A, B and survival period. Results: In case of the evaluation of the A there was a significant difference between the group of >6 and 6<. In case of the evaluation of the B there was a significant difference between the group of >1000 and 1000<.Conclusion: The ratio of the lowest values in the recurrent tumor and in the muscle on T2WI images, and the lowest value of recurrent tumor on the DWI images could predict the prognosis.
平成28年度HIMAC共同利用研究成果発表会

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