本文關(guān)鍵詞：雙低掃描技術(shù)聯(lián)合自適應(yīng)統(tǒng)計迭代重建技術(shù)在能譜CT冠狀動脈成像中的應(yīng)用研究，由筆耕文化傳播整理發(fā)布。

雙低掃描技術(shù)聯(lián)合自適應(yīng)統(tǒng)計迭代重建技術(shù)在能譜CT冠狀動脈成像中的應(yīng)用研究

Applied research on double low scanning technique in gem spectrum ct coronary artery angiography

[1] [2] [3]

SONG Juan, WANG Chengwei, LI Yong （ Shihezi Medical College ,Shihezi 832002,China）

[1]石河子大學(xué)醫(yī)學(xué)院,新疆石河子832002; [2]石河子大學(xué)醫(yī)學(xué)院第一附屬醫(yī)院,新疆石河子832002;

文章摘要：目的：探討雙低掃描技術(shù)聯(lián)合自適應(yīng)統(tǒng)計迭代重建技術(shù)（ASiR）在心率≤65次/min患者中行寶石能譜 CT 冠狀動脈成像的可行性。方法收集90例心率≤65次/min擬行冠狀動脈增強(qiáng)掃描的患者,隨機(jī)分為 A、B、C 3組,A組行雙低掃描技術(shù),B組行常規(guī)掃描模式＋常規(guī)劑量對比劑,C組行常規(guī)掃描模式＋低劑量對比劑,各組均采用前瞻性心電門控掃描技術(shù),B、C2組掃描數(shù)據(jù)采用常規(guī)120 kVp結(jié)合濾波反投影法（FBP）重建,A組病例掃描數(shù)據(jù)分別進(jìn)行60 keV單能量下 FBP重建（A組）及 ASiR40%重建（A1組）,對比分析4組冠狀動脈成像的圖像質(zhì)量及 A、B、C 3組患者檢查中所接受的有效輻射劑量（ED）。結(jié)果 4組冠狀動脈分支CT值、圖像噪聲、信噪比（SNR）、對比噪聲比（CNR）,各指標(biāo)差異均有統(tǒng)計學(xué)意義（P 值均＜0.001）,其中 A1組圖像 SNR 、CNR最高,C組各冠狀動脈分支圖像噪聲最低。A1組與B組冠狀動脈評分差異無統(tǒng)計學(xué)意義（χ2=0.01,P=1.000）,A 組與 B組（χ2=22.428,P＜0.001）、B組與C組（χ2=39.005,P＜0.001）、A1組與 A組（χ2=21.854,P＜0.001）冠狀動脈評分差異均有統(tǒng)計學(xué)意義,A組患者接受的 ED（2.60 mSv±0.26 mSv）低于B組（3.02 mSv±0.36 mSv）（t=3.738,P=0.001）及C組（3.11 mSv ±0.23 mSv）（t=3.725,P=0.001）。結(jié)論雙低掃描技術(shù)聯(lián)合 ASiR在寶石能譜CT冠狀動脈成像中是可行的,能夠獲得良好的圖像質(zhì)量,患者所接受的輻射劑量及對比劑風(fēng)險也大大降低,使冠狀動脈CT成像技術(shù)更趨完美。

Abstr：Objective To investigate the feasibility of double low scanning technique using the gem spectrum CT coronary artery angiography among the patients at low heart rate≤ 65 beats per minute.Methods This prospective study was approved by the institutional re-view board with patient informed consent.Ninty patients （heart rate≤65 beats per minute）were randomly devided into 3 groups.Group A un-derwent spectral CCTA with iodixanol （Visipaque,270mg/mL）and low scanning technique,Group B conventional CCTA with iohexol （Omnipaque,370 mg/mL）and Group C conventional CCTA with iodixanol （Visipaque,270 mg/mL）,Routine scan mode was used in Group B and Group C.Prospective ECG gating mode was used in all groups.120kVp polychromatic images with FBP algorithm （Group B and Group C）were reconstructed for conventional CCTA,60 keV monochromatic images with FBP algorithm （Group A） or with a fixed blending level （40%）of ASiR （Group A1 ）were reconstructed for spectral CCTA.Compared the image quality of four groups and ED in three groups.Results The difference was ststistically significant between four groups with the CT value,im-age noise,SNR and CNR of coronary （each P〈0.001.Group A1 has the highest SNR and CNR.Group C has the lowest image noise.There were no significant difference of coronary score between group A1 and group B（χ2=0.01,P=1.000））.There was significant difference of coronary score between group A and group B （χ2=22.428,P〈0.001）,group B and group C （χ2=39.005,P〈0.001）, group A1 and group A （χ2=21.854,P〈0.001）.Effective radiation dose in the group A（ED2.60±0.26 mSv）was lower than that of group B （ED3.02±0.36 mSv）（t=3.738,P=0.001）and group C （ED3.11±0.23）（t=3.725,P=0.001）.Conclusion Double low scan-ning technique using the gem spectrum CT corona

文章關(guān)鍵詞：

Keyword：:double low gem spectrum CT coronary artery angiography radiation dose

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  本文關(guān)鍵詞：雙低掃描技術(shù)聯(lián)合自適應(yīng)統(tǒng)計迭代重建技術(shù)在能譜CT冠狀動脈成像中的應(yīng)用研究，，由筆耕文化傳播整理發(fā)布。