کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5725974 1609723 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Research articleImpact of noise-optimized virtual monoenergetic dual-energy computed tomography on image quality in patients with renal cell carcinoma
ترجمه فارسی عنوان
مقاله پژوهشی بررسی اثر توموگرافی کامپیوتری انرژی دوگانه مجازی تک انرژی با قابلیت نویز بر کیفیت تصویر در بیماران مبتلا به کارسینوم سلولی کلیه
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی رادیولوژی و تصویربرداری
چکیده انگلیسی


- DECT enables post-processing of noise-optimized virtual monoenergetic images.
- VMI+ reconstructions at low-keV levels significantly improve image quality of RCC.
- Highest CNR and tumor-to-cortex ratios were observed for 40-keV VMI+ series.
- Highest scores for RCC lesion delineation were assigned for 40-keV VMI+.

ObjectiveThe aim of this study was to evaluate the impact of a noise-optimized virtual monoenergetic imaging (VMI + ) reconstruction technique on image quality and lesion delineation in patients with renal cell carcinoma (RCC) undergoing abdominal dual-energy computed tomography (DECT).Materials and methodsFifty-two patients (33 men; 61.5 ± 13.6 years) with RCC underwent contrast-enhanced DECT during the corticomedullary and nephrogenic phase of renal enhancement. DECT datasets were reconstructed with standard linearly-blended (M_0.6), as well as traditional virtual monoenergetic (VMI) and VMI+ algorithms in 10-keV increments from 40 to 100 keV. Contrast-to-noise (CNR) and tumor-to-cortex ratios for corticomedullary- and nephrogenic-phase images were objectively measured by a radiologist with 3 years of experience. Subjective image quality and RCC delineation were evaluated by three independent radiologists.ResultsGreatest CNR values were found for 40-keV VMI+ series in both corticomedullary- (8.9 ± 4.9) and nephrogenic-phase (7.1 ± 4.6) images and were significantly higher compared to all other reconstructions (P < 0.001). Furthermore, tumor-to-cortex ratios were highest for 40-keV nephrogenic-phase VMI+ (2.1 ± 3.5; P ≤ 0.016), followed by 50-keV and 60-keV VMI+ (2.0 ± 3.2 and 1.8 ± 2.8, respectively). Qualitative image quality scored highest for 50-keV VMI+ series in corticomedullary-phase reconstructions and 60-keV in nephrogenic-phase reconstructions (P ≤ 0.031). Highest scores for lesion delineation were assigned for 40-keV VMI+ reconstructions (P ≤ 0.074).ConclusionLow-keV VMI+ reconstructions lead to improved image quality and lesion delineation of corticomedullary- and nephrogenic-phase DECT datasets in patients with RCC.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Journal of Radiology - Volume 97, December 2017, Pages 1-7
نویسندگان
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