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What is Base64

Chapter 10
Handbook of Research on Distributed Medical Informatics and E-Health
It is a positional notation using a base of 64. It is the largest power-of-two base that can be represented using only printable ASCII characters. This has led to its use as a transfer encoding for e-mail among other things. It uses the characters A–Z, a–z, and 0–9 in that order for the first 62 digits but the symbols chosen for the last two digits vary considerably between different systems.
Published in Chapter:
A Web-Based Application to Exchange Electronic Health Records and Medical Images in Ophthalmology
Isabel de la Torre Díez (University of Valladolid, Spain)
Copyright: © 2009 |Pages: 13
DOI: 10.4018/978-1-60566-002-8.ch010
Abstract
This chapter describes a Web -based application to store and exchange Electronic Health Records (EHR) and medical images in Ophthalmology: TeleOftalWeb 3.2. The Web -based system has been built on Java Servlet and Java Server Pages (JSP) technologies. Its architecture is a typical three-layered with two databases. The user and authentication information is stored in a relational database: MySQL 5.0. The patient records and fundus images are achieved in an Extensible Markup Language (XML) native database: dbXML 2.0. The application uses XML-based technologies and Health Level Seven/Clinical Document Architecture (HL7/CDA) specifications. The EHR standardization is carried out. The main application object is the universal access to the diabetic patients EHR by physicians wherever they are.
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