Application of Image Mode Value in Evaluation the Magnetic Resonance Fat Ratio of Liver

應用眾數值評估磁振造影肝臟脂肪比例

孫進智(Chin-Chih Sun)；劉秀貞(Hsiu-Chen Liu)；李振昌(Chen-Chang Lee)；趙世裕(Shih-Yu Chao)

磁振造影 ； 脂肪肝 ； 脂肪比例 ； DIXON方法 ； IDEAL方法 ； magnetic resonance imaging ； ImageJ ； fatty liver ； fat ratio ； the DIXON method ； the IDEAL method

中華放射線技術學雜誌

39卷3期（2015 / 09 / 01）

173 - 180

英文

愈來愈多人即使沒有肝炎感染及飲酒的狀況下仍然罹患脂肪肝。本研究中用ImageJ 軟體後處理運算來分析磁振造影所產生影像的脂肪比例，後處理運算包括影像灰階圖、影像運算、三維表面圖及灰階圖分析，再運用灰階圖分析結果之眾數值，顯示脂肪肝治療前及治療後的差異。眾數值顯示，脂肪比例於治療後降低，病人的抽血資料亦顯示丙氨酸轉胺酶降低。我們得以客觀運用磁振造影中DIXON 或IDEAL 的取像方法，配合肝臟影像的眾數值之使用，呈現整個肝臟的二維影像脂肪比例。

More and more people suffer from fatty liver disease in the world even without hepatitis infections or alcoholic intake. In this paper, we propose to carry out a magnetic resonance imaging (MRI) fat ratio reconstruction on ImageJ to analyze the MRI output images. Post processing methods include image histogram, calculator, mathematic, 3D surface plot, and histogram analysis. Mode value of histogram analysis from a patient who undergoes fatty liver treatment was displayed before and after treatment. With mode value display, the fat ratio decrease after fatty liver therapy. The patient blood test with alanine transaminase levels also decrease. With the mode value display of the liver, we can objectively display the fat ratio of the whole liver in a 2-dimensional image using the DIXON or the IDEAL methods.