Evaluation of the biliary tract: The value of performing magnetic resonance cholangiopancreatography in conjunction with a 3‐D spoiled gradient‐echo gadolinium enhanced dynamic sequence

The 3‐D gradient‐echo (GRE) sequence allows thinner sections and better resolution of biliary obstruction. When the presence of biliary obstruction is identified using magnetic resonance cholangiopancreatography, the addition of the 3‐D GRE sequence may be helpful for diagnosing biliary obstruction. By showing the changes in the bile duct wall, within the duct lumen and around the bile duct, this technique can be helpful for distinguishing benign from malignant stricture as well as a stone from an enhancing intraluminal mass.     

Clinical practice guideline on the optimal radiotherapeutic management of brain metastases

Background  

An evidence-based clinical practice guideline on the optimal radiotherapeutic management of single and multiple brain metastases was developed.     

Patient with Leriche's syndrome and concomitant superior mesenteric aneurysm: Evaluation with contrast‐enhanced three‐dimensional magnetic resonance angiography,computed tomography angiography and digital subtraction angiography

Conventional angiography is regarded as the gold standard in vascular imaging but it is invasive, and difficulty may be encountered in the evaluation of aortic occlusion disease. Superior mesenteric artery aneurysm is an uncommon disease, which can result in life‐threatening haemorrhage after rupture. With the rapid development of computed tomography angiography (CTA) and magnetic resonance angiography (MRA), high‐quality images of the vascular system can be obtained in a non‐invasive manner. We report a case of Leriche's syndrome with concomitant superior mesenteric aneurysm using contrast‐enhanced 3‐D CTA and MRA, with digital subtraction angiography correlation.     

复方氨基比林注射液组分的统计模拟分光光度法测定

统计模拟分光光度法用于制订复方氨基比林注射液3组分的含量测定。本研究用全面交叉组合实验设计,获得有限但足够的实验数据,用逐步回归法构造反映无限实体在不同UV-VIS波长下吸收度与组分含量经验关系的“最优”数学模型,用改良单纯形法寻优求出未知样品诸组分的含量,得到了圆满的结果。