The first chapter gives an introduction to the methods of the radiology department's digitization. The chapter defines the research problem, the subject and goal of the work are described, the working research hypotheses are set and the brief content of the work is presented by the chapter. Digitization of radiological departments is the process of transitioning to digital methods of storing, printing, transmitting, and displaying radiological images. The digitization process follows the generally accepted DICOM standard, which defines the storage of digital radiological images and the communication between medical imaging devices. Digitization brings numerous benefits to patients such as radiation dose reduction, due to unnecessary repetition of recording (in some cases), and the ability for other specialists to inspect images and share them across the network. It can improve education and interpretation. By eliminating harmful chemicals (dark room processing) digitization is also environment-friendly. DICOM defines the storage of medical data by DICOM file, which is a set of DICOM data. DICOM data can be a text or binary sequence of bytes, which describes some clinical data (e.g. patient name, device type, image pixels, PDF report). The DICOM file can start with several metadata, followed by a sequence of bits of different DICOM data, and ends with the image data (pixels), audio waveform (WAV) or document data (PDF). One of the most significant advantages of digitization is that transfer of DICOM objects and DICOM commands are based on TCP/IP protocol. For communication, the DICOM standard uses its application network protocol called DIMSE and DICOMweb, the web-friendly RESTful DICOM protocol. The main purpose of DICOM communication is that two DICOM communicating devices are exchanging data in a precisely defined format and order. The DICOM data exchange model is based on service delivery. A DICOM device requiring service from another device is designated as a Service Class User (SCU), and the service provider is designated as a Service Class Provider (SCP).