本文選題：肺動脈 + 體層攝影術(shù)��； 參考：《蘭州大學》2012年碩士論文

【摘要】：研究目的： 1、探討MSCT肺動脈成像不同注射速率和對比劑濃度對周圍肺動脈顯示率的對比研究。 2、探討MSCT肺動脈成像不同準直寬度對周圍肺動脈顯示率的對比研究。 材料與方法： 收集我院2011年2月至2011年10月行胸部增強掃描,排除肺腫瘤、肺結(jié)核、肺部手術(shù)史、肺部感染及支氣管擴張、肺栓塞、嚴重肺心病及肺動脈高壓、嚴重心衰及肺血管畸形患者。增強掃描采用Bolus-tracking技術(shù),感興趣區(qū)(ROI)均位于主動脈-主肺動脈層面肺動脈干腔中間,觸發(fā)閾值設(shè)為100HU,延時3s開始監(jiān)測,達到閡值后啟動掃描,從肺尖至肺底掃描。掃描條件120kv,80mAs。對比劑總量50ml,按照不同對比劑濃度和注射速率分組：A組為350mgI/ml,3ml/s：B組350mgI/ml,5ml/s；C組300mgI/ml,3ml/s；D組300mgI/ml,5ml/s；按照不同準直寬度分組：D組0.6mm,E組1.5mm(300mgI/ml,5ml/s)；A、B、C、D組重建層厚0.75mm,E組重建層厚1.5mm。統(tǒng)計學分析不同組肺動脈干、左右肺動脈及4級肺動脈CT值和5、6肺動脈顯示率。 結(jié)果： 最終納入本研究患者100例；男性68例,女性32例。A、B、C、D組肺動脈干、左右肺動脈及4級肺動脈CT值比較有差異(P0.05),且4級肺動脈平均CT值比較B組值均大于其余三組；D組與E組比較無差異(P0.05)；五組4級肺動脈分支顯示數(shù)目無統(tǒng)計學意義(P=0.19)；五組5級肺動脈顯示率下葉區(qū)有統(tǒng)計學差異(P0.05)；6級肺動脈顯示率每個葉區(qū)均有統(tǒng)計學差異(P0.05);D組與E組比較5級肺動脈顯示率無統(tǒng)計學意義(P=O.78),6級肺動脈顯示率有差異(P=0.00)。 結(jié)論： 1、采用濃度350mgI/ml,注射速率5ml/s可以顯著提高周圍肺血管顯示率； 2、采用較薄準直0.6mm可以提高5、6級肺動脈顯示率
[Abstract]:Objectives of the study: 1. To investigate the contrast study of MSCT pulmonary artery imaging with different injection rate and concentration of contrast medium on peripheral pulmonary artery. 2. To investigate the contrast study of MSCT pulmonary artery imaging with different collimation width on peripheral pulmonary artery. Materials and methods: From February 2011 to October 2011, we performed chest enhanced scanning to exclude lung tumor, pulmonary tuberculosis, history of pulmonary surgery, pulmonary infection and bronchiectasis, pulmonary embolism, severe pulmonary heart disease and pulmonary hypertension, severe heart failure and pulmonary vascular malformation. Contrast-enhanced scanning was performed with Bolus-tracking technique. The region of interest (ROI) was located between aorta and pulmonary artery, and the trigger threshold was set to 100HU. the delay of 3s was monitored, and then the scan was started from the top of the lung to the bottom of the lung. The scanning condition was 120kvn 80 mAs. The total amount of contrast agent was 50 ml. According to the concentration of contrast agent and injection rate, we divided into two groups: group A: 350 mg / ml / 3ml / s: B: group B: 350mgIml / ml / s / B group: group C: group C 300mg / ml / s group: group C: 300mg / ml / d group: group C: 300mgIml / ml / 5ml / s; The CT value of pulmonary trunk, left and right pulmonary arteries and 4 grade pulmonary artery and the display rate of 5 ~ 6 pulmonary artery were analyzed statistically. Results: Finally, 100 patients were included in this study, including 68 males and 32 females. The CT values of left and right pulmonary arteries were significantly higher than those of grade 4 pulmonary arteries, and the mean CT values of grade 4 pulmonary arteries in group B were higher than those in group E (P 0.05), and there was no significant difference between group D and group E in the number of pulmonary artery branches of grade 4. There was significant difference in the display rate of the lower lobe area between the five groups. There was no significant difference in the display rate of the grade 5 pulmonary artery between the D group and the E group. There was no significant difference in the display rate of the grade 5 pulmonary artery between group D and group E (P 0.005). Conclusion: 1. The injection rate of 5ml/s at concentration 350 mg I / ml could significantly increase the peripheral pulmonary vascular display rate. 2Then using thin-collimated 0.6mm can improve the display rate of 5 ~ 6 grade pulmonary artery.
【學位授予單位】：蘭州大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：R816.41

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本文編號：1972852