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The digital pathology archive: the UMC Utrecht initiative

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Title: The digital pathology archive: the UMC Utrecht initiative


1
The digital pathology archive the UMC Utrecht
initiative
Paul van Diest, MD, PhD Professor and
Head Department of Pathology University Medical
Center Utrecht p.j.vandiest_at_umcutrecht.nl
2
The problem I
  • 100.000 new slides per year
  • archive of 7.000.000 slides
  • total weight 60.000 kg
  • weight increase 100 kg per year

3
The problem II
  • slides often have to be retrieved
  • clinicopathological conferences
  • compare with new material
  • teaching
  • research

4
The problem III
  • slide retrieval takes time (0.5 fte)
  • many circulating slides
  • slides may get lost/misplaced
  • slide quality deteriorates in time
  • faded colors
  • loose cover glasses
  • broken

5
The solution?
  • technically feasible to digitize all slides
  • store images on SAN
  • view slides digitally

6
Advantages of the digital archive
  • all slides are digitally available
  • instantaneously
  • simultaneously to multiple users
  • no slide retrieval from the archive
  • no searching for circulating slides
  • constant image quality
  • no slides get lost/damaged

7
Advantages of the digital archive
  • quicker preparation of CP conferences
  • CP can be held outside the pathology
  • laboratory
  • close colleagues can be consulted quicker
  • remote colleagues (at home, at conferences,
  • on vacation) can be consulted quicker
  • external consultations can be done quicker
  • images can be made available in EPF (ZIS,
    Mirador)

8
Advantages of digital microscopy teaching
  • all students view the same best slide
  • slide images can be integrated with
  • annotations
  • questions
  • macroscopic images
  • sound clips
  • links
  • etc

9
Advantages of the digital archive
  • more efficient CP conferences
  • higher speed, dynamics and flexibility of
  • consultation
  • higher quality and more dynamic teaching
  • but

Can it be done?
10
The digital pathology archive the UMC Utrecht
solution
acquisition workstation
scanning
macro imager
order form scanner
RVC
database
DPS
Sun SAN
HSM
storage
clinical users
pathology users
6 TB fast access hard disk array
120 TB tape library
11
Digital slide demo
12
PALGA link
13
Pitfalls of the digital archive I
  • huge storage management
  • 200 MB 1 GB per slide (20x)
  • 80 TB per year
  • backup
  • back archive
  • speed of image retrieval
  • logistics of scanning 500 slides per day
  • no delay in having slides scanned
  • flexible scanning slots
  • image compression

14
Pitfalls of the digital archive II
  • costs (vs. savings/quality improvement)

15
Scanning logistics
  • scanners are loaded twice daily
  • at different moments
  • organize other work around this
  • 7 hours per run
  • bar code recognition in scanners
  • extra set of slide boxes
  • mark slides to be scanned (double slides)
  • do not write on slides
  • install alarm system when scanner crashes

16
Future perspectives I
  • nationwide digital archive (EPF)
  • quicker revision
  • quicker consultation

or
17
Future perspectives II
  • digital diagnostics
  • remote diagnostics
  • diagnostic networks

18
from ..
to ..
pathology cockpit
19
The digital pathology archivedesirable and
feasible!
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