Objective:To explore the current status and the influencing factors of knowledge, attitude and behavior of radiodermatitis in patients with nasopharyngeal carcinoma undergoing radiotherapy, so as to provide a scientific basis for nursing staff to formulate effective health education programs.Methods:A self-designed questionnaire was used to investigate 220 radiotherapy patients with nasopharyngeal carcinoma in the radiotherapy department of 4 tertiary A hospitals in Hunan Province.Results:The scores of knowledge, attitude, and behavior of radiodermatitis patients with nasopharyngeal carcinoma were (61.58±19.93), (75.70 ±15.64), (65.87±14.21) points, respectively. The main factors influencing of behavior are knowledge, attitude, radiodermatitis grade, radiotherapy frequency, and family personal monthly income level ( t values were 1.978-8.081, P<0.05). Conclusion:At present, patients with nasopharyngeal carcinoma undergoing radiotherapy have a partial understanding of radiodermatitis and poor self-observation of radiodermatitis. Nursing staff should pay special attention to the patients with incomplete knowledge, negative attitudes, low family personal monthly income, low frequency of radiotherapy, and low grade of radiodermatitis.

Objective To evaluate the application value of high resolution MRI fat suppression T2WI combined with DWI in anal fistula and its activity. Methods We analyzed the clinical data and MRI findings of 59 patients who received high resolution MRI from January 2016 to November 2017. According to the clinical and surgical results,anal fistulas were divided into positive inflammatory activity(PIA)and negative inflammatory activity(NIA). ADC values of anal fistula were measured and the optimal cut-off of ADC values were calculated. Results 59 patients with 71 anal fistulas and 62 internal openings confirmed by surgical results.ADC values were differenct between PIA and NIA anal fistulas(P = 0.001) and the optimal cut-off of ADC value were 1.214. The sensitivity of high resolution MRI fat suppression T2WI,DWI and T2WI combined with DWI for detecting anal fistula and internal opening were 80.28%(57/71),83.10%(59/71),95.77%(68/71) and 82.26%(51/62), 83.87%(52/62),96.77%(60/62),respectively. Conclusion MRI-DWI is very important for evaluating the activities of anal fistula and thigh resolution MRI fat suppression T2WI combined with DWI has the highest sensitivity for detecting anal fistula and internal opening.