Related Experiment Video
Updated: Jun 22, 2026

Invasive Hemodynamic Characterization of the Portal-hypertensive Syndrome in Cirrhotic Rats
Published on: August 1, 2018
Enhancing sensitivity of portal monitoring at varying transit speed
T Schroettner1, P Kindl, G Presle
1Radiation Safety and Application, Austrian Research Centers GmbH-ARC, Seibersdorf, Austria. thales.schroettner@arcs.ac.at
Abstract:
The sensitivity of a portal monitoring system has been improved by introducing speed dependent integration time in the data processing of the count rate signal. Characterization and first tests have been performed using a pneumatically driven (137)Cs point source, before deploying the system to a test point at a railway junction near Vienna. At 14m/s the MDA could be reduced by a factor of two and at 28m/s by a factor of three compared to a fixed integration time of 1s, whereas high sensitivity at low speed remained unaffected.
Related Concept Videos
Portal Hypertension
Hepatic Portal System
At its core, the hepatic portal vein is the result of a confluence of the superior and inferior mesenteric veins along with the splenic vein. Each of these veins has a unique role. The superior mesenteric vein is responsible...
Methods for Studying Drug Absorption: In situ
The Doluisio method involves perfusing a prepared segment of a rat's small intestine with a solution of radiolabeled drug and a non-absorbable marker. This helps to differentiate between absorbed and non-absorbed drug concentrations. The intestinal segment is connected at both ends using tubing and syringes,...

