Leon is one of the most important cities in the country. The center itself is an attractive destination due to its museums, art galleries, colorful colonial architecture, an imposing cathedral, and the facades of its churches. The city also has hotels, restaurants, local tour operators, bars and clubs.
Figure 8b. (a) CT scan demonstrates multiple neurofibromas (arrow) simulating enlarged lymph nodes in the retrocrural space and gastrohepatic ligament. (b) CT scan obtained in a different patient demonstrates neurofibromas (arrow) simulating extensive celiac adenopathy.
Positron Emission Tomography-Computed Tomography (PET/CT). Positron emission tomography (PET) uses small amounts of radioactive materials called radiotracers, a special camera and a computer to help evaluate your organ and tissue functions.By identifying body changes at the cellular level, PET may detect the early onset of disease before it is evident on other imaging tests.ET and PET/CT scans are performed to: 1  detect cancer. 2  determine whether a cancer has spread in the body. 3  assess the effectiveness of a treatment plan, such as cancer therapy. 4  determine if a cancer has returned after treatment.