Head C-

CT HEAD WITHOUT CONTRAST
(last updated 09/08/2025, last reviewed 09/08/2025)

INDICATION: Headache, seizure, ataxia, stroke, r/o bleed, trauma, AMS, neurologic defect.

SERIES

TECHNICAL PARAMETERS
POSITIONING/MODE: supine / axial – sequential (angle with canthomeatal line)

SINGLE COLLIMATION WIDTH: 0.625 mm

SLICE THICKNESS: 5 mm (axial)

KERNAL: std brain and bone

SFOV: small (<24 cm)

COVERAGE: foramen magnum ->vertex

ACQUISITION: caudocranial

IV CONTRAST: no

POSTPROCESSING: 5 mm axial brain, 5 mm axial bone, 2.5 to 3 mm coronal brain, 2.5 to 3 mm sagittal brain

NOTES:

In order to minimize radiation dose, ensure that the patient is centered in the gantry and that any unnecessary objects have been removed.

***For pediatric patients (<18 yo) follow ALARA principle and use pediatric specific technical parameters per respective CT scanner***

Angle with canthomeatal line