Effects of different reconstructions of digital tomosynthesis on pulmonary ground glass nodules detection：an experimerntal study

Abstract:

Objective：To evaluate the effects of different reconstruction methods of digital tomosynthesis on pulmonary ground glass nodules detection using a chest anthropomorphic phantom. Methods：Using the methods of shift-add（SA） and filtered back projection （FBP） to reconstruct image respectively after scanning the phantom implanted with simulation nodules. Two radiologists counted the positive nodules and evaluated the effect of pulmonary nodules detection by two methods. Results：Total detection rates of pulmonary nodules by FBP（thickness++） and SA were 71.67% and 26.67%，with statistically significant difference（P<0.05）. Total detection rates of pulmonary nodules by FBP（thickness） was higher than other four kinds of FBP but without statistically significant differences（P >0.05）. Conclusions：DTS is an important supplement of digital radiography and CT；the method of FBP is better than SA in pul－monary nodule detecting.