Poor gallbladder filling is a manifestation of the gallbladder under imaging. Poor gallbladder filling means that the gallbladder volume has become smaller and is not filling up to the point where it can store more bile. Poor gallbladder filling may occur for natural reasons such as the patient has just eaten or the gallbladder itself is small in size, but it may also be a sign of a lack of gallbladder function. The gallbladder stores and concentrates the bile secreted by the liver through continuous diastole, and after eating, the gallbladder then expels the bile to digest food. If the patient has just eaten and the gallbladder drains the bile to allow it to enter the intestine to digest food, an examination at this time will often show a poorly filled gallbladder. If the gallbladder is naturally small and unable to carry too much bile, poor gallbladder filling will also be reported. If the patient has long term chronic cholecystitis, the wall of the gallbladder is significantly thickened and scarred, in which case the diastolic function of the gallbladder is significantly reduced, thus not being able to store more bile and showing poor filling. In addition, if there are a large number of stones in the gallbladder, especially gallbladder-filled stones, the whole gallbladder is occupied by stones and bile cannot be filled in it, which also manifests as poor filling of the gallbladder. If there is poor filling of the gallbladder, the patient can undergo further gallbladder function measurement to assess the current functional status of the gallbladder and see if further medication or surgery is needed.