Whats all this on my chest x-ray and VQ scan?

heres what it said for the chest x-ray...

well, everything else was normal, except this:

"there is minimal prominence of the interstitial and perihilar
markings. There is mild hyperaeration. There are no definite
consolidative infiltrates, CHF, pleural effusion, or pneumothoraces.
No active infiltrates."

ok, whats this hyperaeration and the markings thing about?
now onto the VQ scan results.. im just gonna skip to the problems
they mentioned, otherwise everything else is normal:

"there is mild retention on the washout phase which cold be related to
mild reactive airway disease. "

everything else was normal. no defects, etc.

i had a followup CAT scan, without contrast, and it showed absolutely
nothing wrong. no sign of interstitial lung disease or fibrosis, or
anything at all.

.

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