CT HEAD WITHOUT AND WITH CONTRAST
(last updated 09/08/2025, last reviewed 09/08/2025)
INDICATION: r/o metastases, mass.
SERIES
- Axial Brain precontrast (5 mm)
- Axial Brain postcontrast (5 mm)
- Axial Bone (5 mm)
- Coronal and Sagittal Brain precontrast (2.5 to 3 mm)
- Coronal and Sagittal Brain postcontrast (2.5 to 3 mm)
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: yes
INJECTION RATE: 2 mL/sec
SCAN DELAY: 30 to 60 sec
IV CONTRAST DOSE: 75 to 100 mL
CTDIvol: <75 mGy
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