Radiology calculators

Adrenal washout

Absolute and relative washout from three attenuation measurements.

Abdominal

eGFR and contrast safety

CKD-EPI 2021 from creatinine, with the thresholds radiology actually uses.

Contrast and safety

ACR TI-RADS

Points across five ultrasound features, then a size-dependent recommendation.

Head and neck

Thyroid volume

Volume per lobe from three diameters, plus the total.

Head and neck

Fleischner nodule follow-up

Follow-up interval for an incidental pulmonary nodule on CT.

Thoracic

NEXUS and PECARN c-spine

Clear the cervical spine without imaging, in adults and in children.

Trauma

Bladder volume

Ellipsoid volume from three diameters, with post-void thresholds.

Urogenital

Bosniak v2019

Class and management for a cystic renal mass on CT.

Urogenital

PI-RADS v2.1

Zone, DWI, T2, DCE and size give the assessment category.

Urogenital

Prostate volume & PSA density

Ellipsoid volume from three diameters, plus PSA density.

Urogenital