Complications of cholecystitis and/or biliary colic may also include cholangitis, sepsis, pancreatitis, hepatitis, and choledocholithiasis (10%). In addition, Gallbladder perforation occurs in 10% of patients with cholecystitis. When perforation is localized, it may be seen as pericholecystic fluid by ultrasonography.
Half-life is defined as the time it takes for one half of a radioactive element to decay into a daughter isotope. As radioactive isotopes of elements decay, they lose their radio activity and become a brand new element known as a daughter isotope.
Over the next 2 days 2500 of the remaining radioactive nuclei undergo decay. This is half of the remaining 5000 radioactive nuclei. The isotope undergoes further decay and it takes 2 days for the number of radioactive nuclei to halve in number. The half life for this radioisotope is 2 days.Therefore the number of radioactive nuclei is always half the number there was 2 days ago.his is called the half life of radioactive material or radioisotope. Half life can be defined as the time taken for the number of nuclei in a radioactive material to halve. It can also be defined as the time taken for the count rate of a sample of radioactive material to fall to half of its starting level.