本文關鍵詞： 能譜CT KeV 肺氣腫 層厚 體積 CT值 EI指數(shù)　出處：《山西醫(yī)科大學》2017年碩士論文　論文類型：學位論文

【摘要】：目的:能譜CT掃描方式下,利用GSI(gemstone spectral imaging)瀏覽器及Shaded Surface Lung軟件研究不同層厚及KeV對男性肺氣腫患者總體積、平均CT值、EI指數(shù)等測量時的影響。方法:對確診的40例男性肺氣腫患者行能譜掃描。利用GSI view軟件從50-80KeV每隔5KeV創(chuàng)建一組數(shù)據(jù),共7組;對5mm(厚層)的單能數(shù)據(jù)進行0.625mm(薄層)重建,并用Shaded Surface Lung軟件進行測量,測量其雙肺總體積,平均密度,EI指數(shù)。評價不同KeV,不同重建層厚下全肺總體積,平均密度,EI指數(shù),是否有顯著差異。并對測量值采用合適的統(tǒng)計學處理。統(tǒng)計學軟件為SPSS22.0,以P0.05認為有差異,具有統(tǒng)計學意義。結果:1.不同KeV下肺氣腫總體積、平均CT值無顯著差異(單位:體積ml,CT值Hu,體積P=0.6550.05;平均CT值P=0.9980.05)。但是大于60KeV時總體積測量更穩(wěn)定。50-80KeV各組總體積為4329.9±993.9,4507.0±1057.8,4719.8±1170.2,4776.4±1206.4,4780.1±1207.6,4780.1±1207.6,4779.9±1200.8,4766.6±1185.0,4665.7±1143.4;50-80KeV各組平均CT值為-855.4±31.2,-855.9±32.9,-852.4±36.7,-850.8±38.2,-852.1±38.0,-853.2±38.0,-854.2±37.8。2.不同KeV下EI指數(shù)有差異(P0.05)。低KeV測量EI指數(shù)會產(chǎn)生較大誤差,大于60KeV時測量穩(wěn)定。50-80KeV各組EI-950指數(shù)為0.205±0.096,0.180±0.095,0.133±0.096,0.093±0.0172,0.113±0.095,0.118±0.096,0.124±0.098。3.薄層與厚層CT對體積測量無顯著差異(P=0.9460.05)。薄層總體積均值為4495.0±1309.0,厚層總體積均值為4515.5±1361.2。4.薄層與厚層CT對平均CT值及EI指數(shù)測量有差異(CT值P=0.0230.05;EI指數(shù)P=0.030.05)。厚層CT較薄層CT升高20Hu左右。薄層平均CT值為-841.2±36.9,厚層平均CT值為-821.2±39.1。薄層EI-910指數(shù)為0.227±0.155,厚層EI-910指數(shù)為0.136±0.128。結論:不同KeV及層厚對男性肺氣腫定量測定有影響。
[Abstract]:Objective: to study the effect of different slice thickness and KeV on the total volume of emphysema in male patients with emphysema by using GSI(gemstone spectral imaging browser and Shaded Surface Lung software. Methods: 40 cases of male emphysema were scanned by energy dispersive spectrum. A set of data was created from 50-80 KeV every 5 KeV by GSI view software. The single energy data of 5 mm (thick layer) were reconstructed with 0.625 mm (thin layer), and measured by Shaded Surface Lung software. The total volume and mean density of the lung were measured, and the total lung volume, mean density and ei index were evaluated under different Kev and different thickness of the reconstructed layer. The statistical software is SPSS 22.0, the statistical software is SPSS 22.0. the statistical software is SPSS 22.0. the statistical software is SPSS 22.0. the statistical software is SPSS 22.0. the statistical software SPSS 22.0 is considered to be different, which has statistical significance. Results: 1. The total volume of emphysema under different KeV, There was no significant difference in the mean CT value (unit: volume volume CT value Hu, volume P0.6550.05; average CT value: Pu 0.9980.055.However, the mean CT value of each group was 4329.9 鹵993.9 鹵993.9V 4507.0 鹵1057.847.8 鹵1170.24776.4 鹵1207.64780.1 鹵1207.64780.1 鹵1207.64779.9 鹵1207.64779.9 鹵1207.64779.9 鹵1207.64779.9 鹵1207.64779.9 鹵1207.64779.9 鹵1285.04665.7 鹵1185.04665.7 鹵1143.44.50KeV = -855.4 鹵31.2n -855.9 鹵32.9ke-8536.77-858.0.8 鹵38.38.28.32 鹵38.88.32 鹵38.88.88.88.32 鹵38.88.84.2keV. there was a significant difference in the average value of CT between groups. The error of ei index is great. The EI-950 index of stable. 50-80 KeV groups was 0. 205 鹵0. 096 鹵0. 180 鹵0. 095 鹵0. 133 鹵0. 096 0. 093 鹵0. 0172 0. 113 鹵0. 096 0. 118 鹵0. 096 0. 124 鹵0. 098. 3. There was no significant difference between thin layer CT and thick slice CT in volume measurement (P0. 946. 05). The average CT value of thin slice CT was -841.2 鹵36.9, the average CT value of thick slice was -821.2 鹵39.1, the EI-910 index of thin layer was 0.227 鹵0.155, and the index of thick slice EI-910 was 0.136 鹵0.128.Conclusion: different KeV and slice thickness have influence on the quantitative measurement of emphysema in male.
【學位授予單位】：山西醫(yī)科大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：R563.3;R816.41

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