The calculator in question is the AAST (American Association for the Surgery of Trauma) Imaging Criteria for Classification of Liver Injury. This scoring system is used in the patient population that has sustained a liver injury, typically as a result of trauma. The AAST imaging criteria provide a standardized method to grade the severity of liver injuries based on imaging findings, usually from a computed tomography (CT) scan. 

The clinical utility of this calculator is to guide management decisions, including the need for surgical intervention, and to predict patient outcomes. It helps in stratifying the severity of liver injuries, which is crucial for determining the appropriate treatment approach and for communication among clinicians. 

There are no specific exclusion criteria for the use of the AAST imaging criteria for liver injury. However, it should be noted that this scoring system is primarily applicable in the setting of acute trauma and may not be as relevant or accurate in other causes of liver injury, such as chronic liver disease or non-traumatic acute liver injury.

AAST imaging criteria for classification of liver injury

# Criteria
 ## Classification
A. Subcapsular hematoma < 10% surface area; parenchymal laceration < 1 cm depth
B. Subcapsular hematoma 10-50% surface area; intraparenchymal laceration < 10 cm in diameter; parenchymal laceration 1-3 cm in depth and <= 10 cm length
C. Subcapsular hematoma > 50% surface area; ruptured subcapsular or parenchymal hematoma; intraparenchymal laceration > 10 cm in diameter; parenchymal laceration > 3 cm in depth; any injury in the presence of a liver vascular injury or active bleeding contained within liver parenchyma	 
D. Parenchymal disruption involving 25-75% of hepatic lobe; active bleeding extending beyond the liver parenchyma into the peritoneum
E. Parenchymal disruption > 75% of hepatic lobe; juxtahepatic venous injury to include retrohepatic vena cava and central major hepatic veins

# Conditions
- A
- B
- C
- D
- E
- true