本文選題：肺動(dòng)脈 + 磁共振血管成像��； 參考：《放射學(xué)實(shí)踐》2015年12期

【摘要】：目的:觀察不同翻轉(zhuǎn)帶放置方法時(shí)多翻轉(zhuǎn)空間標(biāo)記脈沖技術(shù)(SLEEK)非對(duì)比劑增強(qiáng)肺動(dòng)脈血管成像的效果,探討肺動(dòng)脈SLEEK-MRA最佳翻轉(zhuǎn)帶放置方法。方法:將40例無(wú)肺動(dòng)脈及肺部疾病的健康志愿者作為研究對(duì)象,利用1.5T MRI掃描儀對(duì)所有志愿者行肺動(dòng)脈SLEEK-MRA掃描,每例志愿者分別采用"+"字交叉法和肺野平行放置法放置翻轉(zhuǎn)帶,掃描完成后將原始圖像傳至工作站進(jìn)行圖像后處理,由2位影像學(xué)診斷醫(yī)師采用4分法對(duì)肺動(dòng)脈4級(jí)分支的圖像質(zhì)量進(jìn)行主觀評(píng)分,并測(cè)量肺動(dòng)脈主干及左、右肺動(dòng)脈干的對(duì)比信噪比(CNR)及信號(hào)信噪比(SNR)。利用單因素方差分析對(duì)計(jì)量資料進(jìn)行統(tǒng)計(jì)學(xué)分析;利用Cohen's Kappa檢驗(yàn)評(píng)估2位醫(yī)師之間判斷結(jié)果的一致性。結(jié)果:40例志愿者均順利完成掃描。兩位讀片醫(yī)師對(duì)肺動(dòng)脈4級(jí)分支(主干、左右肺動(dòng)脈干、葉間動(dòng)脈和段間動(dòng)脈)圖像質(zhì)量評(píng)分的一致性非常好(Kappa值分別為0.931、0.880、0.778和0.778)。在肺野平行放置法MRA圖像上,兩位醫(yī)師對(duì)肺動(dòng)脈4級(jí)分支的圖像質(zhì)量評(píng)分的均值分別為2.71±0.52、2.67±0.34、2.48±0.29和2.44±0.21,均高于"十字"交叉法(分別為2.17±0.41、1.79±0.34、1.43±0.15和0.72±0.31),兩組間差異均有統(tǒng)計(jì)學(xué)意義(P0.05)。肺動(dòng)脈主干及左、右肺動(dòng)脈干的CNR及SNR,在肺野平行放置法圖像上(CNR:524.81、470.65、428.71;SNR:539.31、486.14、436.12)均優(yōu)于"十字"交叉法(CNR:289.58、302.81、285.71;SNR:310.14、314.01、311.61),差異有統(tǒng)計(jì)學(xué)意義(P0.05)。結(jié)論:使用肺野平行放置法設(shè)置翻轉(zhuǎn)帶進(jìn)行SLEEK-MRA肺動(dòng)脈成像,可清晰顯示肺動(dòng)脈主干及其外周小分支動(dòng)脈,成像效果較佳,可作為臨床上SLEEK-MRA檢查時(shí)的常規(guī)翻轉(zhuǎn)帶放置方法。
[Abstract]:Aim: to observe the effect of multi-flipping spatial label pulse technique (SLEEK) in enhancing pulmonary artery angiography with different placement methods, and to explore the best placement method of pulmonary artery SLEEK-MRA. Methods: a total of 40 healthy volunteers without pulmonary artery and pulmonary diseases were studied. Pulmonary artery SLEEK-MRA scanning was performed on all volunteers with 1.5T MRI scanner. In each case, the "cross" method and the "lung field parallel placement" method were used to place the flipping band. After scanning, the original image was transferred to the workstation for post-processing. The image quality of pulmonary artery grade 4 branches was evaluated by two imaging diagnostics. The contrast SNR and SNR of pulmonary artery trunk, left and right pulmonary artery trunk were measured and the signal-to-noise ratio (SNR) of signal to noise ratio (SNR) was measured. Single factor analysis of variance (ANOVA) was used to analyze the statistical data and Cohen's Kappa test was used to evaluate the consistency of the results between the two physicians. Results all 40 volunteers successfully completed the scan. The two radiographers had a good consistency on the image quality scores of grade 4 branches of pulmonary artery (main trunk, left and right pulmonary trunk, interlobar artery and intersegmental artery). The Kappa values were 0.931 ~ 0.880 ~ 0.778 and 0.778 respectively. On MRA images of pulmonary field parallel placement, the mean image quality scores of pulmonary artery grade 4 by two doctors were 2.71 鹵0.52 鹵2.67 鹵0.34 鹵2.48 鹵0.29 and 2.44 鹵0.21, respectively, which were higher than those of "cross" method (2.17 鹵0.41 鹵1.79 鹵0.341.43 鹵0.15 and 0.72 鹵0.31), respectively. The difference between the two groups was statistically significant (P 0.05). The CNR and SNR of the main pulmonary artery and the left and right pulmonary trunk were better than that of the "cross" crossover method (CNR: 289.582.8285.71SNR: 310.14314.01, 311.61) on the parallel placement image of lung field, and the difference was statistically significant (P 0.05). Conclusion: the SLEEK-MRA pulmonary artery imaging can clearly display the main pulmonary artery and its small peripheral branches by setting the reversal band with parallel placement of the lung field. The imaging effect is better and it can be used as a routine method for the placement of the reversal band in clinical SLEEK-MRA examination.
【作者單位】： 華中科技大學(xué)同濟(jì)醫(yī)學(xué)院附屬同濟(jì)醫(yī)院放射科;濱州醫(yī)學(xué)院附屬醫(yī)院放射科;
【基金】：湖北省自然科學(xué)基金資助項(xiàng)目(2013CFB018、2013CFB110) 國(guó)家自然科學(xué)青年基金(81501447) 山東省醫(yī)藥衛(wèi)生科技發(fā)展計(jì)劃(2014WS0492)
【分類(lèi)號(hào)】：R445.2;R543.2

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