發(fā)布時(shí)間：2018-02-11 00:11

  本文關(guān)鍵詞： 冠心病 體層攝影術(shù) X線(xiàn)計(jì)算機(jī) 冠狀血管造影術(shù) 輻射劑量　出處：《中國(guó)醫(yī)學(xué)影像學(xué)雜志》2015年04期 　論文類(lèi)型：期刊論文

【摘要】：目的雙能量冠狀動(dòng)脈CT血管成像(CTA)是一種非常具有前景的一站式檢查,但較高的輻射劑量使其應(yīng)用受到限制,本文擬探討低管電流結(jié)合基于原始數(shù)據(jù)的迭代重建(SAFIRE)技術(shù)雙能量冠狀動(dòng)脈CTA低劑量檢查的可行性。資料與方法 120例檢查者根據(jù)A球管電流隨機(jī)分為常規(guī)180 m As、濾波反投影重建組及低劑量150 m As、120 m As、90 m As組,每組30例,低劑量組采用SAFIRE 3重建,比較4組平均CT值、圖像噪聲(SD)、信噪比(SNR)、對(duì)比噪聲比(CNR)、圖像質(zhì)量主觀評(píng)分及輻射劑量(ED)。結(jié)果 4組病例冠狀動(dòng)脈顯示節(jié)段、平均CT值差異無(wú)統(tǒng)計(jì)學(xué)意義(P0.05),圖像質(zhì)量主觀評(píng)分、SD、SNR、CNR差異有統(tǒng)計(jì)學(xué)意義(P0.05),其中150 m As組圖像質(zhì)量主觀評(píng)分、SNR、CNR最高,SD最低;但常規(guī)180 m As組與90 m As組圖像質(zhì)量主觀評(píng)分、SD、SNR、CNR差異無(wú)統(tǒng)計(jì)學(xué)意義(P0.05);4組ED分別為(5.50±1.47)m Sv、(4.55±1.16)m Sv、(3.41±0.77)m Sv、(2.44±0.67)m Sv(P0.05),90 m As組較180 m As組ED下降了55.62%。結(jié)論90 m As結(jié)合SAFIRE行雙能量冠狀動(dòng)脈CTA檢查能夠保證圖像質(zhì)量,并大幅降低輻射劑量,具有較好的應(yīng)用前景。
[Abstract]:Objective Dual-energy coronary CT angiography (CTAA) is a promising one-stop examination, but its application is limited by high radiation dose. This paper is to investigate the feasibility of low-dose double-energy coronary CTA with low-tube current combined with iterative reconstruction based on original data. Data and methods 120 examiners were randomly divided into conventional 180 m Ass according to A-tube current. Filter backprojection reconstruction group and low dose 150m Asln 120m as 90mAs group. 30 cases in each group were reconstructed with SAFIRE 3 in low dose group. The mean CT value, image noise, signal-to-noise ratio (SNR), contrast noise ratio, subjective image quality score and radiation dose were compared among 4 groups. Results Coronary artery segments were displayed in 4 groups. There was no significant difference in average CT value (P 0.05), but there was significant difference in subjective score of image quality (SDR) and SNRCNR (P 0.05). The subjective score of image quality in 150 Mas group was the highest and the lowest in SNR CNR. However, there was no significant difference in the subjective score of image quality between the normal 180 as group and 90 m as group. Conclusion the Ed of the four groups were 5.50 鹵1.47 m SvlV, 3.41 鹵0.77 m SvlV, 2.44 鹵0.67 m SvlP 0.05 and 90 m as group were lower than that of the 180 m as group, respectively. Conclusion 90m as combined with SAFIRE is lower than the 180mAs group in double energy coronary artery CTA (Ed = 2.44 鹵0.67mSvP0.05 + 90 mAs). Conclusion\\\; The quality of the image can be guaranteed by the inspection, And the radiation dose is greatly reduced, which has a good application prospect.
【作者單位】： 昆明醫(yī)科大學(xué)第一附屬醫(yī)院醫(yī)學(xué)影像科;
【分類(lèi)號(hào)】：R816.2

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本文編號(hào)：1501778