The entry of the modern information technology and the appearance of the new teaching medium cause the new ed-ucational pattern innovations, bring the life and vitality to the medical physics education in medicine institutions of higher learning. This paper analyzed the current situation of the modern information technology application in medical physics teach-ing briefly, put forward several problems about the modern information technology application in medical physics teaching, and discussed the medical physics network course construction in medicine institutions of higher learning.

Objective This paper studies on feasibility of low dose CT scanning in lung cancer patients simulated localisation.Methods 62 patients cases of lung cancer are selected.Scan parameter:scan twice by 20/100 mA,the other parameter remain unchanged as voltage of 120 kV,thickness of 5 mm,pitch of 1:1 and scan time of 1 s.After scan,picture quality was evaluated according to excellent,good,bad under different condition.Volume of target was determined by treatment planning system.Data such as dose index value of single helical scan,z-axis scan range,dose length product value and etc.are recorded in order to evaluate radiation dose of patients.Picture quality and the difference of radiation dose were statistically analyzed using Fisher's and pair t-test.Results Picture quality of low dose scanning was a little bit lower than that of normal dose,however,picture quality difference of difference dose scanning was statistically meaningless (number of patients according to excellent,good,bad were 46,13,3 and 50,11,1,P =0.541).There is no obvious difference of target volume under different dose scanning in the same (36.78 cm3,40.35 cm3,t =2.57,P =0.189).Radiation dose of low dose scanning group is far less than that of high dose scanning group and the difference is obvious (133.05 mGy,941.25 mGy,t =-41.24,P =0.000).Conclusions Low dose scanning of 20 mA current during CT simulated localisation tremendously reduces harm that may happen to patients during CT scan,while tumor target delineation and scanned picture quality is guaranteed.

Objective:To investigate the potentially inappropriate medication(PIM)among elderly patients with chronic diseases in Shanghai communities and related influence factors.Method:Six community Health service Centers were choosen using stratified sampling. Total 968 elderly patients with chronic diseases who visited to the outpatient clinic of Shanghai Community Health Service Centers from July to August 2018 were included in the study. The PIM was investigated according to the 2015 Beers criteria. The χ 2 test and multivariate logistic regression model were used to analyze factors related to the PIM. Results:The survey showed that 317 elderly patients had PIM with 412 person-doses. In 134 person-doses, the PIM was unrelated to the disease; in 18 person-doses, PIM was caused by interaction of drug with disease/symptoms; in 259 person-doses PIM was related to the drugs that should be cautiously used for elderly; only in 1 person-dose the PIM was caused by the interaction between drugs. The drugs with the highest proportion of PIM were diuretics, benzodiazepines and aspirin. There were significant differences in age, kinds of diseases, kinds of drugs and times of visiting community health service centers between elderly patients with PIM and those without PIM (χ 2=42.28, 35.51, 46.47, 38.46; all P<0.05). The main PIM-related factors were age, kinds of diseases, kinds of drugs and times of visiting community health service centers. Conclusion:The study shows that the prevalence of PIM among elderly chronic diseases patients in Shanghai communities is relatively high, which is associated with the age, kinds of diseases, kinds of drugs and times of visiting community health service centers.