X-ray.

[rawr_a_tiny_bit]

I gotta have a X-ray done & was wondering if fluid on the lungs can show up on X-ray of the lungs?

[mrsmummy]

Yes, an chest x-ray can detect any fluid on the lungs. It usually appears as whitish areas at the lung base. You can read about it here:

medicinenet.com/pleural_eff...