CT HEAD WITHOUT AND WITH CONTRAST
(last updated 10/28/2020, last reviewed 02/07/2022)
(last updated 10/28/2020, last reviewed 02/07/2022)
INDICATION: r/o metastases, mass.
SERIES
- Axial Brain precontrast
- Axial Brain postcontrast
- Axial Bone
- Coronal and Sagittal Brain precontrast (3 mm)
- Coronal and Sagittal Brain postcontrast (3 mm)
| | | |
|
POSITIONING/MODE
|
supine/axial-sequential angle with canthomeatal line (see image below) |
supine/axial -sequential angle with canthomeatal line (see image below) |
|
kV/mA/rot time
|
120 kV/automA/<1sec |
120 kV/automA/<1sec |
|
SLICE THICKNESS
|
5 mm |
5mm |
|
PITCH/TABLE FEED
|
Pitch 1 to 1.5 |
Pitch 1 to 1.5 |
|
KERNAL
|
std brain |
std brain |
|
SFOV
|
<25 cm |
<25 cm |
|
COVERAGE
|
foramen magnum -> vertex |
foramen magnum -> vertex |
|
ACQUISITION
|
caudocranial |
caudocranial |
|
IV CONTRAST
|
---- |
80 mL Isovue 300 |
|
INJECTION RATE
|
---- |
2 mL/sec |
|
SCAN DELAY
|
---- |
30 to 60 sec |
|
CTDIvol
|
<75 mGy |
<75 mGy |
|
POSTPROCESSING
|
Axial brain Axial bone Coronal Brain (3 mm) Sagittal Brain (3 mm) |
Axial brain Axial bone Coronal Brain (3 mm) Sagittal Brain (3 mm) |
NOTES:
***For pediatric patients (<18 yo) follow ALARA principle and use pediatric specific technical parameters per respective CT scanner***
Angle with canthomeatal line