I have a family history, mother and sister who died of lung cancer. i am a former smoker-15 years ago. should i be screened?

Yes, you should: Request low dose spiral CT scan for the screening. Also talk to your primary care physician for more information and ask for a clear explanation about the possible benefits and risk. Good thinking.

Chest CT every other: Current recommendations for smokers of more than 10 years is Chest CT every othr year

Low dose helical CT: yes, it is reasonable for you to proceed with screening CT, (low dose helical CT) once a year for 3 years. currently, this is not covered by insurance. but different centers have different policies, mostly flexible to help the high-risk individuals.