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- W2393669864 abstract "Objective To investigate the extent of liver lesion shifting with respiration in an attempt to establish a relevant mathematical model. Methods We measured breathing movements with B ultrasonography in 84 primary or metastatic liver tumors and defined the relation between the lesion shifting extent with age, sex, height, weight, lesion location and size analyzed with the SPSS statistic software . Results The Z, Y and X breathing axis motions were 1.029±0.321 ?cm(range:0.6 1.9 ?cm), 0.301±0.131 ?cm(range:0.0 0.6?cm)and 0.387±0.130 ?cm(range:0.2 0.7?cm),respectively.The movement related factor analysis revealed that age, weight and (right lobe) lesion location presented a negative relationship but height,sex and lesion size presented a positive relationship for Z, Y and X breathing axis motions. Their mathematieal regression models were established as Z= 2.660+2.952H 1.539×10 2 W 3.928×10 3 A; Y= 0.926+0.987H 4.992×10 3 W, and X=0.507+7.629×10 2 S 3.686×10 3 W[H:height(m),W: weight(kg) A: age(year),S: sex(M:1,F:0)]. The liver breathing movement was verified with the model in another 11 patients and the conformation rate was up to 91%. Conclusions The impact of breathing movement on the location of intrahepatic lesion is mainly focused on the Z axis motion.The practical accurary in anticipating breathing movement with the mathematical model is so justified that the use of this model be recommended in stereotactic radiotherapy." @default.
- W2393669864 created "2016-06-24" @default.
- W2393669864 creator A5041623170 @default.
- W2393669864 date "2002-01-01" @default.
- W2393669864 modified "2023-09-23" @default.
- W2393669864 title "Establishment of a mathematical model for the influence of respiratory movement upon the position of an intrahepatic space-occupying lesion" @default.
- W2393669864 hasPublicationYear "2002" @default.
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