Immune system

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:

All of the following scintigraphic methods are often used in the diagnosis of fever of unknown origin (FUO) EXCEPT

Tc-99m-labeled leukocytes and Tc-99m sulfur colloid accumulate in the reticuloendothelial cells of the bone marrow. The distribution of marrow activity is similar for both radiopharmaceuticals with the exception of an acute or chronic bone infection. Osteomyelitis:

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:

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:

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

Fever of unknown origin (FUO) can be caused by all of the following disorders/factors EXCEPT:

Flow imaging is an essential part of all of the following nuclear medicine procedures EXCEPT: