상복부 장기의 정량화에서 SMS Diffusion 기법의 유용성

Purpose : There is no significant difference in the quantitative and qualitative analysis of cDWI before and after contrast enhancement in upper abdominal MRI. The purpose of this study was to investigate the difference of SMS-DWI pre and post using Gadoxetic acid(Primovist) and to compared SMS-DWI and cDWI after contrast enhancement to find out if SMS-DWI can replace cDWI for time reduction. Material and Methods : We retrospectively analyzed 35 patients (24 males, 11 females, mean age: 59 years) who underwent liver magnetic resonance imaging (MRI) from December 2016 to February 2017. The MR system was scanned with SMSDWI before enhancement, SMS-DWI and cDWI after enhancement using 3.0T Magnetom Skyra(Siemens Healthineers, Germany). The image parameters of SMS-DWI were TR 2900 msec, TE 61 msec, 34 slice, slice thickness 5 mm, Matrix 128 × 128 and FOV 400 × 400, Image parameters of cDWI were TR 6400 msec, TE 58 msec, 34 slice, Matrix 128 × 128, FOV 400 × 400, and scanned in free breathing state. ROI was measured in liver, spleen, and kidney using ADC map and statistical analysis was performed with SPSS using paired sample t-test, Pearson's correlation, and Shapiro-Wilk test. Results : The scan times for cDWI and SMS-DWI were 6 minutes 15 seconds and 2 minutes 56 seconds, respectively. The ADC values of liver, spleen, and kidney were not significantly different (p = 0.494, p = 0.822, p = 0.447) in SMS DWI before and after contrast enhancement. The ADC values of the liver, spleen, and kidneys of the SMS-DWI and cDWI after the enhancement were lower in the SMS-DWI with statistically significance (p <0.01, p <0.01, p < 0.01). Conclusion : Scan can time was reduced by about 47% in SMS-DWI compared to cDWI, and gadoxetic acid did not significantly affect SMS-DWI images. After contrast enhancement, SMS-DWI and cDWI are statistically significant, and SMS-DWI will help to shorten examination time by replacing cDWI.