[Liver hyperdensity during arterial phase on CT exams].

The use of helical CT, infusing pump and non-ionic contrast media has enabled the evaluation of different hepatic circulatory phases during contrast injection. Starting the acquisition of scans 20 to 30 seconds after the injection at a rate of 3 to 4 ml/sec the arterial enhancing of the liver is depicted. THROMBOSIS OR COMPRESSION OF THE PORTAL VEIN: Hypervascular triangle-shaped was with peripheral base can be seen, secondary to the increased arterial flow to compensate for the diminished portal flow.

[Computed tomography-guided treatment of infected acute pancreatitis].

We report a case of a 60 years old man admitted for infected acute pancreatitis and duodenal fistula with mediastinal extension at admission, successfully treated in a 40-days period with CT-guided percutaneous catheter drainage (Malecot 14F) inserted with Seldinger method, in spite of a colic fistula development during the treatment.

[Liver cyst sclerotherapy: report of a case and review of the literature].

We present a case of a 49-year-old woman with a single hepatic symptomatic cyst. We performed US and CT examinations for correct diagnostic purposes and we approached it with a 18 G Chiba neddle. There after a 6 F "pig tail" catheter was inserted using Seldinger's method and after performing a cystography 95% ethilic alcohol was instilled within a 48 hs period.

[Computed tomography of acute primary epiploic appendicitis].

Primary epiploic appendicitis is a rare but well known intraabdominal inflammatory process that characteristically presents with an onset of symptoms similar to diverticulitis, appendicitis and other abdominopelvic processes. CT findings are pathognomonic, consistent with a pericolonic oval shaped area of increased density with peritoneal thickening, and fat stranding. The condition is self limited and resolves completely within days under non-steroid antiinflammatory therapy.

[Helical computed tomography of the liver: evaluation of the different circulatory phases].

With Helical CT development it is possible to examine the entire liver during one breath hold, marking difficult to miss any piece of parenchyma, and besides the speed of this method makes it capable to evaluated the different phases of the hepatic circulation after i.v. administration of contrast material.