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Modified CT Severity index calculator (CTSI)

Pancreatic Necrosis:
Extrapancreatic complications (pleural effusion, ascites, vascular complications gastrointestinal tract involvement):
Modified CT severity index:
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Mortele Modified CT Severity Index (CTSI)for scoring acute pancreatitis

Prognostic Indicator Points
Pancreatic Inflammation
Normal pancreas 0
Intrinsic pancreatic abnormalties with or without inflammatory changes in peripancreatic fat. 2
Pancreatic or peripancreatic fluid collection or peripancreatic fat necrosis 4
Pancreatic Necrosis
None 0
≤ 30% 2
≥ 30% 4
Extra Pancreatic Complications
One or more of following: Pleural Effusion, ascites, vascular complications, parenchymal complications, or gastrointestinal tract involvement. 0

Atlanta classification for acute pancreatitis

Type of acute pancreatitis Duration Collections CT description
Interstitial edematous pancreatitis < 4 weeks Acute Peripancreatic Fluid Collections (APFC) Homogeneous fluid density collection confined by normal peripancreatic fascial planes. No definable wall encapsulating. Adjacent to pancreas (no intrapancreatic extension)
>4 weeks Psuedocyst Well circumscribed, usually round or oval homogeneous fluid density. No non-liquid component. Well defined wall; completely encapsulated
Necrotising pancreatitis < 4 weeks Acute Necrotic Collections (ANC) Heterogeneous, non-liquid density of varying degrees (some appear homogeneous early in the course). No definable wall encapsulating the collection.Location: Intrapancreatic and/ or extrapancreatic
>4 weeks Walled-off Necrosis (WON Heterogeneous, liquid and non-liquid density with varying degrees of loculations (some may appear homogeneous). Well defined wall; completely encapsulated. Location:Intrapancreatic and/or extrapancreatic

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Last Updated on November 22, 2020

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