MAGNETIC RESONANCE IMAGING FOR THE EVALUATION OF PROSTATE CANCER MET ASTATIC TO BONE

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  • MRIによる前立腺癌骨転移巣の評価

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The response of bone metastatic lesions to endocrine therapy was assessed by reperated magnetic resonance imaging (MRI) and an isotope bone scan after an average period of 7.0 months (2-10 months) in 12 patients with prostate cancer. MRI used both T1-weighted spin echo technique and short TI IR (STIR) sequence. Of 7 patients with hormone-dependent cancer, the bone metastatic lesions resolved or became vague in all patients on STIR image, while in only 4 and 3 on T1-weighted image and bone scan, respectively. Of 5 patients with hormone-refractory cancer, the lesions progressed on both MRI and bone scan in all patients except one who had initially had diffusely metastatic lesions of systemic bone.<br>The results indicate that STIR image of MRI is helpful for the therapeutic evaluation of bone lesions.

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