【摘要】 目的评价磁共振LAVA技术对上中腹部血管成像的应用价值与图像质量。方法44例用LAVA技术行上中腹检查并作动态增强的病例,按动脉血管树枝状走行分为五级,分析此方法对各级正常、变异及病变血管的显示能力,并与50例行3D DCE-MRA检查病例比较它们的血管成像质量。结果LAVA动态增强与3D DCE-MRA两种成像方法对Ⅱ、Ⅲ、Ⅳ、Ⅴ级血管的显示率差异均有显著统计学意义(P=0.000),LAVA技术中Ⅰ、Ⅱ、Ⅲ级组与Ⅳ、Ⅴ级组间两两比较有显著统计学意义(P=0.000)。LAVA动态增强与3D DCE-MRA这两种方法在血管成像质量方面没有统计学意义(χ2=0.660,P=0.719)。LAVA组病例中发现7例血管变异(其中6例动脉,1例静脉),1例病变血管。3D DCE-MRA对照组发现2例病变血管,由于范围所限无法评价变异血管。结论LAVA动态增强技术对正常血管显示率及血管变异情况明显优于3D DCE-MRA,加上LAVA具有较高的分辨率,可同时显示腹部脏器的病变,故在上中腹部血管成像中LAVA动态增强可代替3D DCE-MRA。更多还原

【Abstract】 Objective To evaluate the application value and image quality of the magnetic resonance LAVA technique for the vessels in the abdomen. Methods Forty-four cases examined with MR LAVA technique were collected, in which the abdominal arteries were classified into 5 grades according to their branch-like courses. Then the ability of LAVA for displaying normal, variant and pathological vessels was analyzed, and their vessels imaging quality was compared with 3D DCE-MRA in another 50 cases. Results The displaying rate of the vessels of Ⅱ, Ⅲ, Ⅳand Ⅴgrading showed a statistically evidence of statistical difference (P=0.000) between LAVA group and 3D DCE-MRA group. In LAVA group, a strong statistical significance was found when comparing vessels of Ⅰ,Ⅱ, Ⅲ grades with vessels of Ⅳ and Ⅴgrades (P=0.000). There was no statistical significance in the imaging qualily of the vessels between LAVA and 3D DCE-MRA (χ2=0.660, P=0.719). Seven cases with vascular variant (6 in artery and 1 in vein) and 1 case with pathological vessel were found in the LAVA group. In 3D DCE-MRA group only 2 cases with pathological vessels were found, and because of the limited scanning range vascular variant could not be evaluated. Conclusion LAVA technique is evidently superior to 3D DCE-MRA in displaying both normal vessels and vascular variant. In addition, LAVA has a higher resolution and can display abdominal foci simultaneously. Therefore, LAVA can substitute 3D DCE-MRA in abdominal vascular imaging.更多还原