Hello and welcome to MedHelp's Respiratory Disorders forum. Thank you for your question. The statement that "PTB Minimal, activity undetermined" is your primary concern? Please do speak to the doctor you are working for to understand what exactly they mean. TB can be latent in that it is in your body but inactive. It can, however, become active at a later date. This is a possibility for what they are talking about. It's estimated that 2 billion people have latent TB. The concern would be that since you began coughing, is it become active. This is likely why they prescribed treatment for it. Here is some information for readers on pulmonary tuberculosis. https://www.mayoclinic.org/diseases-conditions/tuberculosis/symptoms-causes/syc-20351250 The densities sound to be consistent with what is found when there is infection such as TB or pneumonia.
When do you next see your doctor?
I'd ask for high resolution ct.