Effect of metallic materials on magnetic resonance image uniformity: a quantitative experimental study.

Objective: To assess quantitatively the effect of metallic materials on MR image uniformity using a standardized method.

Methods: Six types of 1 cm cubic metallic materials (i.e.

Radiation-induced undifferentiated spindle cell sarcoma following high-dose-rate interstitial brachytherapy for tongue squamous cell carcinoma.

High-dose-rate interstitial brachytherapy (HDR-ISBT) has recently come to be considered one of the most effective treatments for oral cancer. On the other hand, it is important to note that radiation therapy has some side effects. Especially, radiation-induced malignancy is probably the most serious complication affecting long-term survivors.