کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4226267 1609794 2012 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comparison of 3D two-point Dixon and standard 2D dual-echo breath-hold sequences for detection and quantification of fat content in renal angiomyolipoma
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی رادیولوژی و تصویربرداری
پیش نمایش صفحه اول مقاله
Comparison of 3D two-point Dixon and standard 2D dual-echo breath-hold sequences for detection and quantification of fat content in renal angiomyolipoma
چکیده انگلیسی

PurposeTo assess the utility of a 3D two-point Dixon sequence with water–fat decomposition for quantification of fat content of renal angiomyolipoma (AML).Methods84 patients underwent renal MRI including 2D in-and-opposed-phase (IP and OP) sequence and 3D two-point Dixon sequence that generates four image sets [IP, OP, water-only (WO), and fat-only (FO)] within one breath-hold. Two radiologists reviewed 2D and 3D images during separate sessions to identify fat-containing renal masses measuring at least 1 cm. For identified lesions subsequently confirmed to represent AML, ROIs were placed at matching locations on 2D and 3D images and used to calculate 2D and 3D SIindex [(SIIP − SIOP)/SIIP] and 3D fat fraction (FF) [SIFO/(SIFO + SIWO)]. 2D and 3D SIindex were compared with 3D FF using Pearson correlation coefficients.Results41 AMLs were identified in 6 patients. While all were identified using the 3D sequence, 39 were identified using the 2D sequence, with the remaining 2 AMLs retrospectively visible on 2D images but measuring under 1 cm. Among 32 AMLs with a 3D FF of over 50%, both 2D and 3D SIindex showed a statistically significant inverse correlation with 3D FF (2D SIindex: r = −0.63, p = 0.0010; 3D SIindex: r = −0.97, p < 0.0001).Conclusion3D two-point Dixon sequence may provide a reasonable alternative to 2D dual-echo sequence for detection of renal AML and may have additional value for quantification of fat content of these lesions given the observation that 3D FF, unlike 2D and 3D SIindex, is not limited by ambiguity of water or fat dominance. This may assist clinical management of AML given evidence that fat content predicts embolization response.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Journal of Radiology - Volume 81, Issue 1, January 2012, Pages 47–51
نویسندگان
, , , ,