Principle: After intravenous administration of the radiopharmaceutical, we monitor its uptake by hepatocytes, excretion into the bile ducts and its passage into the duodenum. The examination allows to evaluate in a non-invasive way mainly hepatocellular function, bile duct patency and gallbladder function. Indications: functional disorders of gallbladder and bile duct motility acute cholecystitis dg.cholestasis dg.neonatal icterus sphincter of Oddi dysfunction Patient preparation: fasting Bring 50 g. chocolate or liquid cheese in a casing on the day of the examination discontinue medications affecting gallbladder motility Duration of examination: approx. 2 – 3 hours Radiopharmaceutical: 99mTc – trimethyliminodiacetic acid Method of application: Intravenous Examination methodology: The patient lies supine on the gamma table and the radiopharmaceutical is administered intravenously. Immediately after application, a dynamic study focusing on the patient’s abdomen is started, lasting approximately 60 minutes.  Once the gallbladder begins to be imaged (at approximately 30 minutes into the scan) the patient is given the brought chocolate. After the study is completed, we will take a 2 minute static image of the patient. We then repeat this static image at approximately hourly intervals as needed. The patient may eat in between scans.