Nasal & sinus CT questions

* 2017: turbinectomy/septoplasty * No improvement in ability to drain/breathe thru nose * Mucus NEVER drains from nose. Thick mucus drains down my throat 24/7 & I must spit it out non-stop (blowing nose thru my mouth) * 1 sinus infection/month My nose & sinuses have only been assessed using “limited CT’s.” Are there things or areas a Full CT might show that a limited CT wouldn’t? Is there a tool ENTs can use to measure nasal airflow? Can sinus inflammation affect breathing?