)Causes of Elevated HemidiaphragmAbove the diaphragmDiaphragmBelow the DiaphragmDecreased lung volume:* Atelectasis/collapse* Lobectomy/pneumonectomy* Pulmonary hypoplasia* Phrenic nerve palsy* Diaphragmatic eventration* Contralateral CVA: usually MCA distribution* Abdominal tumour* Subphrenic abscess* Liver abscess (Amebic and pyogenic)Radiological findings of Acute CholecystitisUSG findings: Presence of gallstones, thickening of the GB wall (>4 mm), pericholecystic fluid, GB distention, impacted stone, and a sonographic Murphy's signQ (focal tenderness directly over the GB).USG: IOC for diagnosing acute cholecystitisQ (sensitivity 85%, specificity 95%).HIDA scan: Gold standardQ for diagnosing acute cholecystitisHIDA scan: No filling of GB with the radiotracer (99mTc-HIDA) after 4 hours indicates an obstructed cystic ductQA normal HIDA scan excludes acute cholecystitisQ.">