1. No acute pathology/mass/lymphadenopathy
in abdomen means there is nothing significant to worry about as far as your abdomen CT is concerned.
2. Bilateral non-obstructive renal calculi
indicates the presence of stones in both your kidneys which are not obstructing urine drainage
and thus, do not need any surgical intervention. You could meet a urologist
to take medications to dissolve the stones.
3. Right lower lobe pleuro-parenchymal scarring is usually a late sequelae to some old infection and not a cause of worry, especially if you do not have any cough or fever. If you do have significant cough or fever, it maybe advisable to meet a chest physician and get a chest X ray or CT scan
of thorax done.
Hope this helps,