CT CHEST/ABDOMEN C+ (last updated 6/20/2016, last reviewed 02/07/2022)
INDICATION: Metastases, lymphoma, adenopathy, mass, unexplained weight loss.
SERIES
- 3mm Axial Chest Soft Tissue
- 1mm Axial Lung
- 3mm Axial Abdomen
- 3mm Coronal chest only (Lung windows)
- 3mm Sagittal chest only (Lung windows)
- 3mm Coronal Abd only
- 3mm Sagittal Abd only
| | CHEST | ABD/PEL |
|
POSITIONING/MODE
|
supine/helical |
supine/helical |
|
kV/mA/rot time
|
120 kV/auto mA/0.5 sec |
120 kV/auto mA/0.5 sec |
|
DETECTOR COLLIMATION
|
16 x 1.5mm (S16) 24 x 1.2mm (D64) |
16 x 1.5mm (S16) 24 x 1.2mm (D64) |
|
SLICE THICKNESS
|
3mm |
3mm |
|
PITCH
|
1 to 1.5 |
1 to 1.5 |
|
TABLE FEED
|
4.8 cm/sec (S16) 5.8 cm/sec(D64) |
4.8 cm/sec (S16) 5.8 cm/sec(D64) |
|
KERNAL
|
std and lung |
std |
|
SFOV
|
large |
large |
|
COVERAGE
|
thoracic inlet -> diaphragm |
dipahragm -> iliac crest |
|
ACQUISITION
|
craniocaudal |
craniocaudal |
|
ORAL CONTRAST
|
yes |
yes |
|
IV CONTRAST
|
100 mL Isovue 300 30 mL saline |
yes |
|
INJECTION RATE
|
2.5 mL/sec |
--- |
|
SCAN DELAY
|
Care bolus at Ascending Aorta (threshold 100HU ~15 sec) |
30 sec delay btw C and A (S16)
33 sec delay btw C and A (D64) |
|
RESPIRATION
|
Inspiration |
Inspiration |
|
POSTPROCESSING
|
3mm Cor and Sag (lung windows, chest only) |
3mm Cor and Sag (abd only) |
NOTES:
***For pediatric patients (<18 yo) follow ALARA principle and use pediatric specific technical parameters per respective CT scanner***