hi doctor, i wa treated with ptb, and every year i have my clearance and xray for my self worth. i got my job last september , and all of my test are except from the scar i got from my 2005 medication they hired me since my sputum is negative, now i had my xray this april 2013 almost 6months ago from my pre employment medical exam and i had wierd xray result fibrohazy densities in both upper lobe but from the time i had my last xray i never experienced any symptoms, impression is ptb both upper lobe, do i still need medication, what does that result means?