RESUMEN
The PERCIVAL detector is a CMOS imager designed for the soft X-ray regime at photon sources. Although still in its final development phase, it has recently seen its first user experiments: ptychography at a free-electron laser, holographic imaging at a storage ring and preliminary tests on X-ray photon correlation spectroscopy. The detector performed remarkably well in terms of spatial resolution achievable in the sample plane, owing to its small pixel size, large active area and very large dynamic range; but also in terms of its frame rate, which is significantly faster than traditional CCDs. In particular, it is the combination of these features which makes PERCIVAL an attractive option for soft X-ray science.
Asunto(s)
Fotones , Radiografía , Rayos XRESUMEN
Portal hypertension is very often complicated by severe and a life threatening bleeding in GIT in most cases from oesophageal varices. Another complication of PH is dilatation of portosystemic shunts in abdominal wall so-called caput medusae. We describe a case of a man, that was admitted to our surgical department with massive bleeding from recanalisated umbilical vein as complication of portal hypertension. After couple of the recurrence of the haemorrhage and precise diagnosis of the source we have indicated surgical treatment. We cat off the lig. teres hepatis by laparoscopic approach to decrease tension in blood vessels in the abdominal wall. After surgery there were no evidence of rebleeding and the patient was forwarding for monitoring of oesophageal varices in gastroenterological center.
