Scanning

Scanning is a method of radioisotope diagnostics using scanners. Apply for the study of the liver, lungs, kidneys, thyroid gland, spinal cord and brain, bones, lymph system and others With this purpose the patient is injected into the blood of short-lived radioactive drug is mainly accumulated in the examined organ or tissue. To scan uses a radioactive drugs (see): neovitin and heparan that accumulate in the kidneys; Bengali pink and colloidal solutions that accumulate in the liver; iodine for the study of thyroid cancer and other Study started after the maximum accumulation of radioactive drug in the body (time savings for different drugs varies) and finish after receiving the image of the body in the form of bar or digital scans. Specifications scanning speed sensor scanner (see), the type of the collimator, recalculation, cut-off level of the background are set by the assistant individually for each patient before the examination. The doctor outlines on the skin of the patient special markers that after the scanning is transferred to scan.

the scan of the liver
Types of scanogram liver obtained on different machines. At the top - bar scanogram, below - digital. The frequency of strokes and the amount of digits to describe the concentration of the radioactive preparation in the body. Line denotes a costal arch.

Scans normally functioning bodies have distinct characteristic forms and certain sizes (Fig.). After receiving scans assistant carefully writes on her surname, the initials of the patient, the sequence number of the registration book for the introduction of isotopes, the magnitude of the activity and the type of the drug received by patients, and technical conditions of the study. The first copies of non-ferrous scanogram pasted in history, and their copies are stored in the laboratory. Particularly important in the scan has preservation immobility of the patient during the entire time of the study. To do this the technician must conveniently put the patient on the treatment table and, if necessary, to cover him with a blanket. Throughout the research process technician carefully monitors the sick, and if he moves, you must terminate the investigation and start again. Although someone introduced a very small amount of a radioactive drug, it is a source of radiation, and the analyst should use protection spacing (at least 1.5-2 m). When this condition radiation load on the personnel during the whole working day does not exceed 1/3 of the value of the maximum permissible doses of radiation. Cm. also Radioisotope diagnostics.