For educational and reference use only. These calculators do not replace clinical judgement, local protocols, or a qualified clinician. Verify every result independently before it informs patient care.

Emergency radiology

Acute Cholecystitis (Gallbladder US)

Checklist of sonographic findings supporting acute cholecystitis. Imaging findings are one arm of the Tokyo Guidelines (TG18) diagnostic criteria (alongside local and systemic inflammatory signs).

Sonographic Findings Present

Result

0 / 5 findings

A positive sonographic Murphy sign with gallstones has the highest positive predictive value. Combine imaging with clinical/laboratory criteria (TG18).

No supportive sonographic findings

Formula

Count of supportive sonographic findings (of 5). TG18 diagnosis combines imaging with local + systemic inflammatory signs.

References

Yokoe M, et al. Tokyo Guidelines 2018: diagnostic criteria and severity grading of acute cholecystitis. J Hepatobiliary Pancreat Sci 2018;25:41–54.

Disclaimer

Not a standalone diagnosis. TG18 requires local signs (e.g. Murphy sign) plus systemic inflammation (fever, ↑CRP, ↑WBC) with supportive imaging. Consider acalculous cholecystitis in critically ill patients.

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