A European network for virtual microscopy--design, implementation and evaluation of performance

Area of Science:

• Digital Pathology
• Medical Informatics
• Network Infrastructure

Background:

• Web-based virtual microscopy offers novel applications in pathology.
• Image accessibility is crucial for pathology education and collaboration across Europe.

Purpose of the Study:

• To introduce and evaluate a network of academic servers for maximizing virtual slide accessibility in pathology.
• To assess the technical feasibility and economic viability of a geographically distributed virtual microscopy network.

Main Methods:

• Digitization of 154 whole-slide images using whole-slide imaging technology.
• Mirroring virtual slides to five academic servers across Europe via a novel propagation method.
• Implementation of automatic server selection for optimizing slide-viewing speed.

Main Results:

• The network achieved 100% uptime over a 6-month monitoring period.
• Average viewing speed increased to 3.1 Mbit/s with the network, compared to 1.9 Mbit/s with single servers.
• Good viewing speed (>2Mbit/s) was achieved in 86% of countries, an improvement from 68% with single servers.

Conclusions:

• Implementing a virtual microscopy network across a large geographical area is technically feasible.
• The network is economically viable, leveraging existing academic networks and cost-minimizing image compression.
• The developed network significantly enhances virtual slide accessibility and viewing performance for European pathology users.