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Objective: Comparison of the radiation image and the I-131 concentration in benign thyroid tumors with thyroid cancer primary. Subjective, method: Benign tumor group: 52 pt.Cancertumor62Pt Scanner, SPECT imaging. Results,conclusions: Cold nodules were in most of two groups malign and benign tumor (malign: 92.5 percent, benign: 88 percent).- Hot tumor were not seen in both groups -Wann tumor in two groups with low and approximately the same (16.9 percent and 12 percent). Thyroid tumors in the cancer group with irregular radioactive, proportion(39.6 percent) greater than benign tumor (24 percent). Thyroid cancer were mostly irregular in nodules types. The concentration of I-131 in the thyroid gland after 2 hours in group thyrid cancer lower tumor benign groups (Thyroid cancer is 12.7 percent, benign tumor 15.4 percent), but this difference is not statistically significant with p 0.05. 1131 concentration in the thyrid gland after 24 hous in thyroid cancer group lower than benign tumor (Average of cancer group: 28.53 percent, benign tumor: 40.02 percent) this difference is statistically significant with p 0.05.