本文選題：256排螺旋CT　切入點：靜脈周圍的文物　出處：《吉林大學》2013年碩士論文　論文類型：學位論文

【摘要】：目的： 頭頸部CTA已經(jīng)成為評估頸部及顱內血管病變的重要檢查方法之一。然而頭頸部CTA檢查過程中，50ml造影劑用量常會出現(xiàn)靜脈周圍偽影，本研究旨在探討256層螺旋CT頭頸部造影檢查時，不同劑量造影劑的成像效果。 材料與方法： 66例患者隨機分為兩組，每組患者33人。所有患者行頭頸部CTA檢查。A組患者（男21例，女12例；平均年齡56.87±11.53歲）常規(guī)注射50ml造影劑，B組患者（男19例，女14例；平均年齡56.94±11.51歲）注射40ml造影劑，，兩組患者注射造影劑的速度均為5ml/s，注射造影劑后均追加生理鹽水40ml。客觀評價通過測量動脈的CT值來評估，測量位置動脈選取10處，包括頸內動脈7處、椎基底動脈3處，靜脈選取4處。主觀評價由兩名放射科醫(yī)師獨立完成，通過評估軸位圖像及最大密度投影圖像，采用4分法評估。統(tǒng)計學處理采用t檢驗和Mann Whitney U檢驗，P＜0.05有統(tǒng)計學意義。 結果： 圖像質量的客觀評價中，兩組患者頭頸部動脈強化CT值無統(tǒng)計學差異，頸動脈的平均CT值無統(tǒng)計學差異（p=0.87），椎基底動脈的平均CT值無統(tǒng)計學差異（p=0.72）。B組患者靜脈強化CT值較A組顯著降低（110±19.61HUvs.188.27±57.4HU；p0.001）。圖像質量的主觀評價中，B組患者鎖骨下靜脈周圍的偽影較A組降低（p0.001），動脈圖像的評價無顯著性差異。 結論： 256層螺旋CT頭頸部造影中，與50ml造影劑用量比較，40ml造影劑用量的動脈圖像質量無統(tǒng)計學差異，但顯著降低了鎖骨下靜脈周圍偽影。
[Abstract]:Objective:. Head and neck CTA has become one of the most important methods to evaluate the cervical and intracranial vascular lesions. However, in the CTA examination of the head and neck, the venous artifacts often appear in the dosage of 50ml contrast medium. The purpose of this study was to investigate the imaging effects of different doses of contrast media in 256-slice spiral CT cephalographic examination. Materials and methods:. 66 patients were randomly divided into two groups, 33 patients in each group. All patients received CTA examination of head and neck. Group A (21 males, 12 females; mean age 56.87 鹵11.53 years) was given 50ml contrast agent routine injection (19 males, 14 females). The average age was 56.94 鹵11.51 years old) 40 ml contrast agent was injected. The speed of injection of contrast agent was 5 ml / s in both groups, and 40 ml saline was added to the contrast medium. The objective evaluation was evaluated by measuring the CT value of the artery, and 10 arteries were measured. There were 7 internal carotid arteries, 3 vertebrobasilar arteries and 4 veins. The subjective evaluation was performed by two radiologists independently. Statistical analysis was performed with t test and Mann Whitney U test (P < 0. 05). Results:. In the objective evaluation of image quality, there was no significant difference in CT value of head and neck artery enhancement between the two groups. There was no significant difference in the average CT value of carotid artery and vertebrobasilar artery. The enhanced CT value of vein in group B was significantly lower than that in group A (110 鹵19.61 HUvs.188.27 鹵57.4 HUP 0.001). The subjective evaluation of image quality in group B was around the subclavian vein. The artifact in group A was lower than that in group A (P 0.001), and there was no significant difference in the evaluation of arterial images. Conclusion:. There was no significant difference in arterial image quality between 256-slice spiral CT and 50ml contrast medium dosage, but the artefact around the subclavian vein was significantly decreased.
【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：R816.1

【共引文獻】

相關碩士學位論文 前1條

1 李國策;多排螺旋CT肺動脈成像優(yōu)化碘對比劑劑量及注射速率的動物實驗研究[D];遼寧醫(yī)學院;2011年

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