Metode prijenosa digitalnih radioloških slika u mreži ravnopravnih čvorova zasnovane na tehnologijama weba

doctoral thesis

• Title (english): Web technologies based methods for digital radiology image transfer in peer-to-peer network
• Author: Ivan Drnasin; VIAF: 305708728
• Mentor: Mislav Grgić (mentor)
• Committee member: Gordan Gledec (predsjednik povjerenstva)
• Committee member: Mario Kovač (član povjerenstva)
• Committee member: Drago Žagar (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; (Department of Communication and Space Technologies); Zagreb
• Defense date and country: 2022-04-07, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing
• Universal decimal classification (UDC): 004 - Computer science and technology. Computing. Data processing

Abstract

Digitalizacija radioloških odjela je postupak prelaska na digitalne metode pohrane, ispisa, prijenosa i prikaza radioloških slika. Postupak digitalizacije odvija se prema opće prihvaćenoj normi DICOM koja definira pohranu digitalnih radioloških slika i komunikaciju između medicinskih slikovnih uređaja (prijenos slika i drugih informacija). Cilj istraživanja ove disertacije bio je izložiti novi koncept pristupa mreži DICOM DIMSE izravno putem web-preglednika, zasnovan na ovijanju protokola DIMSE, protokolima WebSocket i WebRTC. Predložen je novi koncept korištenja tehnologije WebRTC za izravni prijenos digitalnih radioloških slika koji se provodi izvan sustava medicinskih ustanova. Prikazani su nedostaci postojećih rješenja za pristup slikama izvan medicinskih ustanova i prednosti popularnih rješenje u oblaku. Prikazan je alternativni pristup medicinskim slikama putem protokola WebRTC te je uspoređen s postojećim pristupima medicinskim slikama. Nadalje, predložena je raspodijeljena arhitekturu mreže DICOM DIMSE pomoću protokola WebRTC po uzoru na slične nemedicinske raspodijeljen mreže. Nadalje prikazan je prototip distribuirane mreže raspodijelih čvorova na koju se mogu spojiti klijenti DIMSE i web-klijenti. Djelotvornost predloženih rješenja uspoređena je sa postojećim sustavima DICOM. Mjerenja i rezultati se pokazali da se pretrage i prijenosi datoteka DICOM odvijaju primjerenom brzinom i to sve unutar web-okruženja.

Abstract (english)

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).

• Keywords: digitalizacija; radiologija; medicinske slike; raspodijeljene mreže; optimizacija prijenosa
• Keywords (english): digitization; radiology; medical images; distributed networks; transmission optimization
• Language: croatian
• URN:NBN: urn:nbn:hr:168:275509
• Promotion: 2023
• Study programme: Title: Computer Science; Study programme type: university; Study level: postgraduate; Academic / professional title: Doktor znanosti (Doktor znanosti)
• Type of resource: Text
• Extent: [15], 77 str. : graf. prikazi ; 31 cm + CD-ROM.
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2023-03-28 10:10:13