CT Venogram C+ (last updated 05/16/13, last reviewed 02/10/2022)
INDICATION: r/o Venous abdominal/pelvic thrombosis. Lower extremity swelling.
SERIES
- 3mm Axial
- 3mm Coronal
- 3mm Sagittal
| | |
|
POSITIONING/MODE
|
supine/helical |
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kV/mA/rot time
|
120 kV/Auto mA/0.75 sec |
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DETECTOR COLLIMATION
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16 x 1.5mm (S16) 24 x 1.2mm (D64) |
|
SLICE THICKNESS
|
3mm |
|
PITCH
|
1 to 1.5 |
|
TABLE FEED
|
4.8 cm/sec (S16) 5.8 cm/sec (D64) |
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KERNAL
|
std |
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SFOV
|
large |
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COVERAGE
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~5 cm below knees to iliac crest (if venogram DVT/legs ordered) ~5cm below pubic symphsis to diaphragm (if venogram A/P ordered) |
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ACQUISITION
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caudocranial |
|
ORAL CONTRAST
|
none |
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IV CONTRAST
|
120 mL Isovue 370, followed by 40 mL saline |
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INJECTION RATE
|
3.5 to 4 mL/sec |
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SCAN DELAY
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3 minutes after injection for lower extremity 2 min for abdomen/pelvis |
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RESPIRATION
|
Inspiration |
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POSTPROCESSING
|
3mm Coronal and Sagittal |