Immune system

Images obtained shortly after injection of white blood cells labeled with In-111 or Tc-99m are characterized by intense activity-up to 4 hours, but disappearing prior to 24 hours imaging-pulmonary activity. This phenomenon is caused by the fact that:

Tc-99m and In-111-labeled leukocyte imaging (WBC) are established procedures for diagnosing inflammation and infection. All of the following wounds appear as areas of intense activity on WBC images EXCEPT:

Images obtained shortly after injection of leukocytes labeled with In-111 or Tc-99m are characterized by intense pulmonary activity that clears and approaches background level by:

In-111 and Tc-99m-labeled white blood cells (WBC) accumulation have been observed in all of the following conditions/sites EXCEPT:

In which of the following causes of fever of unknown origin (FUO) diagnostic leukocyte scintigraphy may be especially valuable?

Human antimurine antibody (HAMA) is being produced when:

An organ that removes old red blood cells, holds a reserve of blood in case of hemorrhagic shock, and synthesizes antibodies in its white pulp is called:

To lessen the ability for the development of human anti-mouse antibodies (HAMA), it is possible to retain the immunospecific portion of the antibody that has been encoded as a murine protein, while replacing a large portion of the remainder of the mouse immunoglobulin g (IgG) molecule with:

Radiopharmaceuticals used in imaging of infection and inflammation accumulate in the region of interest because of the locally changed physiologic conditions. An infectious/inflammatory process is characterized by all of the following EXCEPT:

Which of the following diagnostic test uses radioactive material to visualize the drainage of fluid by the lymphatic system?