I'm sorry to hear how sick your father is.
I am not a doctor, but I suggest you ask your oncologist about a lung and heart transplant if you have insurance or money to do so.
This is a decision for you , your father and the doctor to make.

My husband was diagnosed 6/2002 with adnocarcenoma stage iiib - he is a 36 yr non smoker. We have undergone 8 cycles of carboplatnim/taxol -- he underwent carbo platnim this past summer 2003 with radiation therapy, which in our option did more harm than good. He developed a right plural effusion again, this time it has gotten bad. The right lung won't inflate at the top or the bottom of the lung. They did surgery on him an installed a pig-tail cathiter in his right side to help drain the fluid build up, we do this at home. It is a new procedure only out within the past year. His fluid is drained every other day 550 ml , we are faced with the fact that since the lung won't inflate that we will have to have the lung removed. We've even been given an option of an experimental surgery that is to remove the plura and not the lung. Then they pack the lung with a mega dose of chemo to contain the tumor. As far as petscans, they are great. They tell all!!!! My husband has scar tissue built up as well which will show on the petscan and catscans, this is normal from what I know. Trust in the doctors, if you are unsure, always get second opinions. I feel for you. I am dealing with this myself. Its an aweful cancer. If you need support, email me. Also this type of cancer is know to go to the adrenal glands and the liver as well as the brain.