If the virus becomes active after being latent, it causes the disorder known as shingles, or herpes zoster. The virus spreads in the ganglion and to the nerves connecting to it. Nerves most often affected are those in the face or the trunk. The virus can also spread to the spinal cord and into the bloodstream.
About this Procedure. The sniff test is a fluoroscopic exam used to check how the diaphragm (the muscle that controls breathing) moves during activities such as breathing normally and inhaling rapidly. Your diaphragm normally moves down when you inhale, and up when you exhale.
The chest x-ray is performed to evaluate the lungs, heart and chest wall. A chest x-ray is typically the first imaging test used to help diagnose symptoms such as: 1  shortness of breath. 2  a bad or persistent cough.3  chest pain or injury.4  fever. chest x-ray is typically the first imaging test used to help diagnose symptoms such as: 1  shortness of breath. 2  a bad or persistent cough. 3  chest pain or injury. 4  fever.