本文選題：層間射頻信號(hào)干擾 + 質(zhì)量控制��； 參考：《中國(guó)醫(yī)學(xué)影像技術(shù)》2017年11期

【摘要】：目的對(duì)3臺(tái)MRI設(shè)備的層間射頻信號(hào)干擾情況進(jìn)行檢測(cè),以加深對(duì)層間射頻信號(hào)干擾現(xiàn)象的認(rèn)識(shí)。方法通過3臺(tái)MRI設(shè)備(設(shè)備1:GE 1.5T HDi,裝機(jī)時(shí)間:2012年;設(shè)備2:GE 3.0T HD,裝機(jī)時(shí)間:2006年;設(shè)備3:GE3.0T750W,裝機(jī)時(shí)間:2016年)采用軸位T1WI序列掃描ACR模體,記錄層間距為5.0、1.0、0.5和0mm時(shí)的SNR,繪制SNR變化百分比與層間距百分比的函數(shù)圖。處置標(biāo)準(zhǔn):當(dāng)層間距從5mm減小到0時(shí),由層間射頻信號(hào)干擾作用所導(dǎo)致的SNR的下降不超過20%。結(jié)果當(dāng)層間距由5mm減小到0時(shí),設(shè)備1的SNR下降幅度為18.16%,設(shè)備2的SNR下降幅度為23.57%,設(shè)備3的SNR下降幅度為10.75%;設(shè)備1和設(shè)備3的層間射頻信號(hào)干擾檢測(cè)結(jié)果達(dá)到處置標(biāo)準(zhǔn),設(shè)備2(使用時(shí)間超過10年)的檢測(cè)結(jié)果未達(dá)標(biāo)。結(jié)論 3臺(tái)MRI設(shè)備都存在不同程度的層間射頻信號(hào)干擾現(xiàn)象,其中使用時(shí)間最久的設(shè)備檢測(cè)結(jié)果不達(dá)標(biāo)。層間射頻信號(hào)干擾檢測(cè)應(yīng)該在臨床質(zhì)量控制工作中受到重視。
[Abstract]:Objective to detect the interlayer radio frequency (RF) signal interference of three MRI devices in order to better understand the interlayer radio frequency signal interference. Methods the ACR motifs were scanned by three MRI devices (1: GE 1.5T HDi1: 2012; 2: GE 3.0T HDD: 2006; 3: GE3.0T750W, 2016). When the interval between the layers is 5.0 ~ 1.0 ~ 0. 5 and 0mm, the function diagram of the variation percentage of 0mm and the percentage of interval between layers is plotted. Disposal criteria: when the interlayer spacing is reduced from 5mm to 0, the reduction of the SNR caused by interlayer radio frequency interference is not more than 20. Results when the interval between layers was reduced from 5mm to 0, the SNR of equipment 1 was 18.16, that of equipment 2 was 23.57, that of equipment 3 was 10.75.The detection results of radio frequency signal interference between devices 1 and 3 reached the standard of disposal. Equipment 2 (service time over 10 years) test results are not up to standard. Conclusion all the three MRI devices have interlaminar radio frequency (RF) interference in varying degrees, and the test results of the most long-used equipment are not up to the standard. Interlayer radio frequency signal interference detection should be paid attention to in clinical quality control.
【作者單位】： 首都醫(yī)科大學(xué)附屬北京友誼醫(yī)院放射科;中國(guó)計(jì)量大學(xué)信息工程學(xué)院;
【基金】：國(guó)家重點(diǎn)研發(fā)計(jì)劃數(shù)字診療裝備研發(fā)重點(diǎn)專項(xiàng)(2016YFC0106901) 科技北京百名領(lǐng)軍人才培養(yǎng)工程(Z141107001514002) 北京市醫(yī)管局“使命”人才計(jì)劃(SML20150101) 北京學(xué)者(京人社專家發(fā)[2015]160號(hào))
【分類號(hào)】：R197.39

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