LOW DOSE LUNG CANCER SCREENING CT C-
(last updated 08/17/15, last reviewed 02/10/2022)
(last updated 08/17/15, last reviewed 02/10/2022)
This is a limited, low dose protocol
CMS Indications
- Age 50 - 80 years
- At least 20 pack-year smoking history (packs per day x years smoked)
- Asymptomatic
- Current smoker or former smoker who has quit within 15 years
| | LOW DOSE LUNG CANCER SCREENING CT (NLST) |
|
POSITIONING/MODE
|
supine/helical |
|
kV/mA/rot time
|
100 to 140 kV Auto mA with limit (default) 40 mA if <150lbs 60 mA if 150-200 lbs 80 mA if >200 lbs </=0.5 sec |
|
DETECTOR COLLIMATION
|
1 mm |
|
SLICE THICKNESS
|
1.25mm |
|
PITCH
|
0.7 to 1.5 |
|
KERNAL
|
soft tissue and lung algorithm |
|
SFOV
|
1 cm beyond ribs |
|
COVERAGE
|
apices->bases |
|
ACQUISITION
|
craniocaudal |
|
ORAL CONTRAST
|
none |
|
IV CONTRAST
|
none |
|
RESPIRATION
|
inspiration |
|
POSTPROCESSING
|
coronal slab MIPs lung window coronal and sagittal 2mm lung window |
|
AVERAGE EFFECTIVE DOSE
|
</=1.5 mSv |
|
CTDI vol
|
</=3 mGy |