Radiodiagnostic devices and installations

Radiodiagnostic devices and installations - special devices, which register or measure in organs and tissues of radioactive isotopes, introduced with the diagnostic purpose in the body, and get on paper topographical distribution of isotopes in various parts of the body. All radiodiagnostic devices and equipment consist of three parts - the-counter or detector, analyzing and converting unit and recording devices.
In the modern installations of the detector, perceiving radiation, use of scintillation crystals and photomultipliers. Previously used less sensitive gas-discharge counters. The detectors are placed in special protective housings, which are mounted on the movable racks. Update the device with a flexible wire is connected to the detector. Detectors are installed on different parts of the body of the patient, subject to study. They can sit still either rhythmically move within a certain period of time over the target area of the body. A special type of radiodiagnostic devices and installations is kolodzey counter which has a scintillation crystal with a hole (well) in the centre. In this hole placed the vial or tube with the test solution (such as urine, blood) to measure. Registration of the counting rate of radiation from measured the field is either the number of pulses per minute (radiometry), either in the form of curves on paper (radiography). Depending on the type of registration all radiodiagnostic devices and installations are divided into three groups: radiometric (Comet, DSU-68, USS), radiographic (WRC-64, Radiotelegraph) and scanners (GT-2, Szentegat).
Before working radiodiagnostic devices and installations heat for 15-20 minutes, after which regulate their sensitivity and calibrated for standard radioactive drugs, kits, which should be in each laboratory. It is necessary to monitor and prevent pollution of the surface detectors of radioactive drugs. Cm. also Radioisotope diagnostics, Scanning.