<prompt> True about features of cholecystitis on USG a Thick fibrosed gallbladder wallb Stone impacted at neck of gall bladderc Perigallbladder halod Increased vascularityabcbcacdbcd  <response>: USG findings of acute cholecystitis Gallbladder wall thickeningPericholecyst fluid producing circumferential halo of low echogenicity around gallbladderEchogenic bile sludge may completely fill the gallbladder lumen and gives appearance of adjacent liver hepatization of bileGall stone :- May be impacted in the neck or cystic ductSonographic murphys sign Tenderness on pressing the transducer onto the gallbladder 