Study on nasal radioactive anomalies of nasopharyngeal carcinoma in bone imaging

Objective To investigate radioactive abnormalities of nasopharyngeal carcinoma(NPC)in the bone imaging.

Methods Divide 712 diagnosed or suspected NPC patients and other 1036 patients in ⁹⁹Tc^mmethylene diphosphonate bone imaging into 6 groups.Draw ROI of nasal region, and then analysis radioactive counts of ROI.

Results Average radioactivity counts of A group were lower than F group(t=3.47, P < 0.01), and B, C and E groups higher than F group.It showed a significantly statistical difference(t_A=17.73, t_B=4.39, t_E= 2.85, P < 0.01).The ratio of the average radioactivity counts per pixel and the background radioactivity counts of B and C groups were significantly higher than F group(t=24.99, t=13.11, P < 0.01).

Conclusion Radioactivecounts of nasal part in diagnosed or suspected NPC and other carcinoma of nasal patients and the patients with the history of benign or malignant carcinoma increased significantly.