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        基于雙源CT不同成像技術對冠脈CTA的檢查效率和圖像質量的影響

        2020-08-27 01:04:41龔萬灃敖煒群賈玉柱
        中國醫(yī)藥導報 2020年19期
        關鍵詞:輻射劑量圖像質量

        龔萬灃 敖煒群 賈玉柱

        [摘要] 目的 探討基于雙源CT不同技術手段對冠脈CT血管造影(CTA)檢查效率和質量的影響。 方法 收集2018年6月~2019年10月在浙江省立同德醫(yī)院冠脈CTA患者107例,采用簡單隨機分組方法將其分為A組(55例,采用小劑量測試技術)及B組(52例,采用造影劑自動追蹤技術)。記錄兩組患者年齡、體重指數(shù)(BMI)、心率、輻射劑量及檢查時間,測量兩組患者圖像信噪比(SNR)、對比噪聲(CNR)及CT值,評價并比較兩組患者冠脈的圖像質量。結果 兩組患者年齡、BMI、心率、容積CT劑量指數(shù)、有效劑量、冠脈不同節(jié)段CT、主動脈根部及冠脈各節(jié)段SNR比較,差異無統(tǒng)計學意義(P > 0.05)。B組右冠遠段及回旋支遠段CNR優(yōu)于A組,差異有統(tǒng)計學意義(P < 0.05)。兩組患者圖像質量評級比較,差異無統(tǒng)計學意義(P > 0.05)。B組檢查時間顯著短于A組,差異有高度統(tǒng)計學意義(P < 0.01)。 結論 造影劑自動追蹤技術能在保證圖像質量的前提下提高檢查效率。

        [關鍵詞] CT血管造影技術;體層攝影技術;檢查效率;輻射劑量;圖像質量

        [中圖分類號] R541.4 ? ? ? ? ?[文獻標識碼] A ? ? ? ? ?[文章編號] 1673-7210(2020)07(a)-0020-04

        [Abstract] Objective To investigate the effects of different techniques based on dual-source CT on examination efficiency and quality of coronary CT angiography (CTA). Methods A total of 107 patients undergoing coronary CTA in Tongde Hospital of Zhejiang Province from June 2018 to October 2019 were collected, while they were divided into group A (55 cases, using low-dose test technology) and group B (52 cases, using contrast agent automatic tracking technology) by simple random grouping method. The age, body mass index (BMI), heart rate, radiation dose and examination time of the two groups were recorded, and the image signal-to-noise ratio (SNR), contrast noise (CNR) and CT values of the two groups were measured, while the coronary artery image quality were evaluated and compared. Results There were no significant differences in age, BMI, heart rate, volume CT dose index, effective dose, CT of different segments of coronary artery, SNR of aortic root and each segment of coronary artery between the two groups (P > 0.05). The CNR of distal right coronary artery and distal left circumflex artery in group B were superior to group A, and the differences were statistically significant (P < 0.05). There was no statistically significant difference in image quality ratings between the two groups (P > 0.05). The examination time of group B was significantly shorter than that of group A, and the difference was highly statistically significant (P < 0.01). Conclusion Contrast agent automatic tracking technology can improve the inspection efficiency under the premise of ensuring image quality.

        [Key words] CT angiography; Tomography; Examination efficiency; Radiation dose; Image quality

        隨著人口老齡化進程加速,中國心血管病危險因素流行趨勢明顯,導致心血管病發(fā)病人數(shù)持續(xù)增加[1]。冠脈CT血管造影(CTA)作為一項無創(chuàng)檢查,逐漸成為排除冠脈狹窄的首選檢查[2-4]。隨著檢查需求日益增長,患者行冠脈CTA檢查等待的時間延長。怎樣在保證圖像質量及輻射可控的前提下提高檢查效率,是當前面臨的主要問題。本研究基于雙源CT冠脈CTA,對不同技術進行比較,以期得到最佳解決方案。

        本研究亦存在一些不足之處,缺少冠脈DSA“金標準”對照、沒有計入檢查前準備時間、樣本量相對較小,還需進行大樣本研究。

        綜上所述,造影劑自動追蹤技術能夠在滿足圖像質量和輻射劑量可控的前提下縮短檢查時間,提高檢查效率。

        [參考文獻]

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        [8] ?中華醫(yī)學會放射學分會心胸學組,《中華放射學雜志》心臟冠脈多排CT臨床應用指南寫作專家組.心臟冠脈CT血管成像技術規(guī)范化應用中國指南[J].中華放射學雜志,2017,51(10):732-743.

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        [12] ?Ippolito D,F(xiàn)ior D,F(xiàn)ranzesi CT,et al. Diagnostic accuracy of 256-row multidetector CT coronary angiography with prospective ECG-gating combined with fourth-generation iterative reconstruction algorithm in the assessment of coronary artery bypass:evaluation of dose reduction and image quality [J]. Radiol Med,2017,122(12):893-901.

        [13] ?Zhao L,Yang X,Hao F,et al. Ultra-Low Radiation Dose and Contrast Medium of Coronary CT Angiography Using Prospectively ECG-Triggered Without Heart Rate Control:A New Strategy [J]. J Med Imaging Radiat Oncol,2017,7(8):1863-1869.

        [14] ?周星,黃剛,張常青,等.雙源CT低管電壓結合低濃度對比劑掃描模式在冠脈CTA中的應用研究[J].醫(yī)學影像學雜志,2016,26(11):1980-1986.

        [15] ?American College of Cardiology Foundation Task Force on Expert Consensus Documents,Mark DB,Berman DS,et al. ACCF/ACR/AHA/NASCI/SAIP/SCAI/SCCT 2010 expert consensus document on coronary computed tomographic angiography:a report of the American College of Cardiology Foundation Task Force on Expert Consensus Documents [J]. Circulation,2010,121(22):2509-2543.

        [16] ?曹劍,易妍,王怡寧,等.70kV超低管電壓低對比劑用量冠脈CTA研究[J].放射學實踐,2014,29(6):589-592.

        [17] ?Sabarudin A,Sun Z,Ng KH. Coronary computed tomography angiography with prospective electrocardiography triggering:a systematic review of image quality and radiation dose [J]. Singapore Med J,2013,54(1):15-23.

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        [22] ?許麗君,陳晨,張桂敏.CT增強掃描中碘比醇造影劑不良反應的預防與護理[J].解放軍護理雜志,2017,34(20):75-76.

        (收稿日期:2020-02-26)

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