發(fā)布時間：2018-06-11 10:33

  本文選題：眼眶 + 擴散磁共振成像�。� 參考：《中國醫(yī)學(xué)影像技術(shù)》2017年06期

【摘要】：目的探討分段讀出平面回波成像(RS-EPI)在眼眶DWI中應(yīng)用的可行性,并與單次激發(fā)平面回波成像(SSEPI)對照。方法選取42名健康受試者,進行眼眶RS-EPI(RS-EPI組)和SS-EPI(SS-EPI組)掃描。對2組圖像的正常解剖結(jié)構(gòu)顯示能力、脂肪抑制效果、偽影(主要眶尖和顳骨處)及圖像綜合質(zhì)量進行評分;定量分析2組圖像中玻璃體SNR、眼球前后和左右方向的幾何變形率(GDR)、玻璃體和腦橋的ADC值;并進行統(tǒng)計學(xué)分析。結(jié)果 RS-EPI對正常解剖結(jié)構(gòu)的顯示能力(P=0.009 0)、減少偽影能力(P0.000 1)及圖像的綜合質(zhì)量(P0.000 1)均優(yōu)于SS-EPI。兩者脂肪抑制效果的差異無統(tǒng)計學(xué)意義(P=0.753 9)。RS-EPI的眼球前后和左右方向GDR(P=0.001 4、0.001 7)及SNR(P=0.004 0)較SS-EPI顯著降低;而兩組圖像玻璃體、腦橋的ADC值差異均無統(tǒng)計學(xué)意義(P=0.143 8、0.126 2)。結(jié)論眼眶3.0T MR成像中,RS-EPI可提供較常規(guī)SS-EPI質(zhì)量更高的DWI圖像。
[Abstract]:Objective to investigate the feasibility of applying RS-EPI in orbital DWI and compare it with single shot planar echo imaging (SSEPI). Methods 42 healthy subjects were examined with RS-EPIU RS-EPI group and SS-EPIMr SS-EPI group. The display ability of normal anatomical structure, the effect of fat inhibition, artifact (mainly orbital apex and temporal bone) and image quality were evaluated. The values of glass SNR, GDR, ADC of vitreous body and pontine were analyzed quantitatively in two groups of images, and the statistical analysis was carried out. Results RS-EPI was superior to SS-EPI in displaying normal anatomical structure (P0. 009 0), reducing artifact ability (P 0. 000 1) and image quality (P 0. 000 1). There was no significant difference in the effect of fat inhibition between the two groups (P < 0. 753 9). There was no significant difference in the ADC values between the two groups (P 0. 143 80. 126 2), and there was no significant difference between the two groups in the anterior, posterior and left directions of GDRN P0. 001 P0. 001. P0. 0040) compared with SS-EPI (P 0. 143 80. 126 2), but there was no significant difference in the ADC values between the two groups in the vitreous body and the pons. Conclusion RS-EPI can provide better DWI images than conventional SS-EPI in orbital 3.0T Mr imaging.
【作者單位】： 南京醫(yī)科大學(xué)第一附屬醫(yī)院放射科;
【基金】：江蘇高校優(yōu)勢學(xué)科建設(shè)工程資助項目(JX10231801)
【分類號】：R445.2
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本文編號：2004940