Objective To explore the clinical value of gadolinium ethoxybenzyl diethylenetriamine pentaacetic acid （Gd-EOB-DTPA） enhanced magnetic resonance （MR） imaging for cirrhosis-related nodules. Methods Nineteen patients who were suspected cirrhosis with lesions of liver were prospectively included for Gd-EOB-DTPA enhanced MR imaging test between Nov. 2011 and Jan. 2013. The hepatobiliary phase （HBP） images were taken in 20 minutes after agents’ injection. The images were diagnosed independently in two groups： group A， including the plain phase and dynamic phase images； group B， including plain phase， dynamic phase， and HBP phase images. The signal intensity （SI） of lesions in HBP images， background liver SI， and background noise standard deviation were measured by using a circular region of interest， then the lesion signal to noise ratio （SNR） and contrast signal to noise ratio （CNR） were calculated. Results Nineteen patients had 25 tumors in all， including 18 hepatocelluar carcinoma （HCC） and 7 regenerative nodule （RN） or dysplastic nodule （DN）， with the diameter ranged from 0.6 cm to 3.2 cm （average 1.3 cm） . Sixteen HCC manifested hypo SI relative to the normal liver， while 2 HCC manifested hyper SI at HBP. Five HCC had cystic necrosis with the necrotic area， and there were no enhancement in artery phase， while performed flocculent enhancement at HBP. Six RN or DN showed hyper SI while another 1 showed iso SI to background liver at HBP. The diagnostic accuracy rates of group A and group B were 80.0% （20/25） and 92.0% （23/25）. SNR of RN or DN at HBP was 132.90±17.21， and of HCC was 114.35±19.27， while the CNR of RN or DN was 19.47±8.20， and of HCC was 112.15±33.52. Conclusion Gd-EOB-DTPA enhanced MR imaging can improve the diagnosis capacity of cirrhosis-related nodules， so as to develop more accurate and reasonable treatment options.
ObjectiveTo explore the value of sarcopenia index (SI) in the diagnosis of malnutrition in colorectal cancer patients.MethodsA retrospective study was carried out to study on 126 colorectal cancer patients who underwent chemotherapy in West China Hospital of Sichuan University between January 2015 and June 2019. SI and body mass index (BMI) were used for malnutrition diagnosis, and the detection rate of malnutrition was compared.ResultsThe detection rate of malnutrition diagnosed by SI (92.1%) was higher than that by BMI (38.1%) with a statistical difference (P<0.001). Subgroup analysis showed: the detection rate of malnutrition diagnosed by SI vs. BMI in male patients was 97.0% vs. 28.4%, with a statistical difference (P<0.001), and that in female patients was 86.4% vs. 49.2%, with a statistical difference (P<0.001); the detection rate of malnutrition diagnosed by SI vs. BMI in elderly patients (≥65 years) was 92.6% vs. 27.8%, with a statistical difference (P<0.001), and that in young and middle-aged patients (<65 years) was 91.7% vs. 45.8%, with a statistical difference (P<0.001).ConclusionUsing SI to diagnose malnutrition for colorectal cancer patients is worth popularizing for it can discover hidden malnutrition patients.
目的 對邊緣性腦炎患者磁共振（MR）影像學表現進行探討，以明確急性邊緣性腦炎的特異性磁共振影像學征象，了解磁共振成像（MRI）在急性邊緣性腦炎患者診斷以及病情評價中的應用價值。 方法 通過對2008年12月-2010年1月間臨床收集的8例邊緣性腦炎患者進行MRI檢查，并回顧性分析不同序列磁共振影像學表現，總結MRI征象，評價MRI檢查在急性邊緣性腦炎的臨床診治中的作用。 結果 邊緣性腦炎患者顯示特異性的雙側邊緣系統腫脹及信號異常，呈T1WI低信號影；T2WI及FLAIR成像為高信號影像；增強掃描未見確切異常強化；FLAIR成像是檢測病變最敏感的序列。部分患者可見累及邊緣系統外結構。隨訪病例影像學改變可有明顯好轉。 結論 邊緣性腦炎特異性損傷邊緣系統，以雙側海馬為主，MRI影像可直觀反映邊緣性腦炎早期及隨訪期改變，能直接了解邊緣性腦炎顱內受累范圍、程度及治療后恢復情況等，可為其臨床及時診斷及治療評估提供有利信息。
Objective To investigate the value of new double-phasic MR contrast agent (gadobenate dimeglumine， Gd-BOPTA) in diagnosis of hepatocellular carcinoma (HCC) with correlation of pathology. Methods MRI scan was performed on 33 patients suspected of having focal liver lesions by CT or ultrasonography. The MRI scan protocol included routine axial T1WI and T2WI, coronal T2WI and 3D-MRCP, Gd-BOPTA enhanced 3D gradient-echo sequence of T1W (LAVA sequence) acquiring dynamic data at 15 s, 55 s and 90 s respectively, delayed LAVA acquisition at 5 min, 10 min, and at 40 min, 80 min respectively. Surgical specimen was collected for pathological analysis. Results Surgery confirmed the diagnosis of HCC in 21 patients with 27 lesions. The sensitivity, specificity and accuracy of MR imaging with combined phases (including hemodynamic phase and hepatobiliary phase) were 92.9%,93.3%, 92.9% respectively. ①In the hemodynamic phase: 22 lesions showed early enhancement in arterial phase, fast “washout” in portal venous phase, and hypointense in delayed phase. Four lesions showed slight enhancement, while 1 lesion showed no enhancement in all hemodynamic phases. ②In the hepatobiliary phase: 23 lesions showed homogeneous hypointensity compared to the enhanced liver background, but 4 lesions (3 well-differentiated and 1 moderately-differentiated) had patchy or dot-like slightly hyperintense areas scattered within the lesions. Pathologically cholestatic changes of tumor cells were observed and bile-containing small ducts were present. Conclusion Gd-BOPTA enhanced MRI can both depict the hemodynamic characteristics and reflect the absence of normal hepatocyte function in HCC lesions, thus contributing greatly to the diagnosis of HCC.
Objective To investigate the value of a new double action MR contrast agent——Gd-BOPTA in the diagnosis of focal nodular hyperplasia (FNH) of the liver with correlation of pathology. Methods Dedicated MRI scans were performed for 5 patients suspected to have liver FNH on clinical and imaging basis (six lesions). The MR imaging protocol included axial T1W and T2W plain scan, coronal T2 weighted imaging, 3D MRCP, Gd-BOPTA enhanced LAVA dynamic tri-phasic acquisitions (scanning at 15 s, 55 s and 90 s respectively), enhanced 2D T1W scan, enhanced LAVA in delay phase (at 5 and 10 min) and in the hepatobiliary phase (at 40 and 80 min). The imaging features on each MR sequence were compared with surgical and pathological findings. Results Six lesions in 5 FNH patients were all correctly diagnosed (5 conformed by surgery and 1 by needle biopsy). ①The hemodynamic phase: The parenchyma of 5 lesions were markedly enhanced in the arterial phase, being isointense or slight hypointense in both the portal venous and delay phases, while 1 lesion was isointense in all phases except being slight hyperintense in the arterial phase; The central scar of 5 lesions were not enhanced in the dynamic phase, but showed delayed enhancement. ②The hepatobiliary (excretory) phase: The parenchyma of all 6 lesions were slight hyperintense or isointense, and tree-like bile ducts with hyperintensity were seen within one lesion. The scar showed no enhancement. ③Pathology: The parenchyma was consisted of disarranged normal hepatocytes but with cytoedema, lack of portal tracts and cholestatic change. The central scar showed rich fibrous tissue, a very thick-walled arteriole, proliferative bile ducts, infiltration of inflammatory cells and myxomatous changes. Conclusion As a dual-phase MR contrast agent capable of depicting both the hemodynamic attributes and hepatobiliary excretion, Gd-BOPTA enhanced MRI can reflect the pathological features of FNH and reach a high diagnostic accuracy.
目的 利用磁共振彌散張量成像技術（DTI）對右側難治性顳葉癲癇（TLE）患者術前及術后腦白質各向異性分數（FA）進行縱向隨訪研究，并對其與病程等臨床癥狀之間的相關性進行分析，探討右側TLE患者的腦白質FA變化模式。 方法 2008年7月－2009年8月納入10例右側難治性TLE患者。對每個受試者采用GE 3.0 T磁共振及8通道頭線圈掃描，所有DTI圖像通過單次回波平面成像序列采集。采用基于體素分析的SPM8軟件對受試患者術前術后FA圖進行配對t檢驗，觀察難治性TLE患者腦白質變化模式。采用Pearson相關計算FA變化幅度與病程等臨床癥狀之間的相關性，經比較校正后P值＜0.05的區域為有統計學意義的區域。 結果 右側TLE患者FA值降低的區域包括左側顳下回、雙側額中回及左側殼核、右側楔葉。FA升高的區域包括左側海馬旁回、左側顳葉、右側額下回和左側中央旁小葉。相關分析發現，右側TLE患者右側額下回FA變化值與發病年齡呈負相關，左側顳下回FA變化值與術后隨訪間隔時間呈負相關。 結論 右側難治性TLE患者手術治療后大腦白質變化不僅局限于顳葉，還涉及顳葉外結構。