the digital pathology archive: the umc utrecht initiative paul van diest, md, phd professor and head...
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The digital pathology archive: the UMC The digital pathology archive: the UMC Utrecht initiativeUtrecht initiative
Paul van Diest, MD, PhDProfessor and HeadDepartment of PathologyUniversity Medical Center [email protected]
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The problem IThe 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
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The problem IIThe problem II
• slides often have to be retrieved:
• clinicopathological conferences• compare with new material• teaching• research
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The problem IIIThe 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
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The solution?The solution?
• technically feasible to digitize all slides
• store images on SAN
• view slides digitally
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Advantages of the digital archiveAdvantages 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
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Advantages of the digital archiveAdvantages 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)
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Advantages of digital “microscopy” Advantages of digital “microscopy” teachingteaching
• all students view the same “best slide”• slide images can be integrated with
• annotations• questions• macroscopic images• sound clips• links• etc
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Advantages of the digital archiveAdvantages 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?
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The digital pathology archive: the UMC Utrecht The digital pathology archive: the UMC Utrecht solutionsolution
RVC
scanning
database
storage
120 TB tape library 6 TB fast access hard disk array
order form scanner
macro imager
pathology users clinical users
DPS
mirador
HSM
acquisitionworkstation
Sun SAN
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Digital slide demoDigital slide demo
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PALGA linkPALGA link
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Pitfalls of the digital archive IPitfalls 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
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Pitfalls of the digital archive IIPitfalls of the digital archive II
• costs (vs. savings/quality improvement)
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costs
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Scanning logisticsScanning 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
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Future perspectives IFuture perspectives I
• nationwide digital archive (EPF)• quicker revision• quicker consultation
lab A
lab Blab C
lab D
lab E
lab I
lab H
lab G lab F
lab A
lab Blab C
lab D
lab E
lab I
lab H
lab G lab F
centralstorage
or…
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Future perspectives IIFuture perspectives II
• digital diagnostics
• remote diagnostics
• diagnostic networks
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from ……..
to ……..
pathology cockpit
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The digital pathology archive:The digital pathology archive:
desirable and feasible!desirable and feasible!