User guide

iScan System User Guide 75
Image Quality Issues
Image Qu ality Issues
TheiScanReaderisproducinglowintensityimages
Displayedimagesappeartoowhitewithnodetail
Sectionappearsslightlycompressedanddistorted
Cause Resolution
Lowassaysignal. Reviewthehistoryofassaypreparationwiththe
responsiblescientist.Evaluatethelengthoftimesince
preparation,concentrationofsignalsourcedueto
evaporation,andadverseenvironmentalconditions
includinghumidity,temperature,andamountofdirect
sunlight.
Badfocus. Stopthescan,ejecttheBeadChips,andcheckthe
sectionsforforeign
matterthatmayaffectfocus.Ensure
thattheBeadChipsareflatinthecarrierandthattheir
backsidesareclean.
Brokensection. Ifasectionisbroken,thenitcannotproducehigh‐
qualitydata.However,therestoftheBeadChipisnot
affected.
Contrastbarsarenotset
foroptimalviewing
of
images.
SelecttheAutoContrastcheckbox.Ifimagesarestill
notoptimal,readjustthecontrastsliders.SeeViewing
ScanResultsonpage49.
Imagesarepresentbut
intensitydataarezero,
eventhoughregistrationis
successful.
Dataareacceptableanduncompromised.
Cause Resolution
Contrastisnotsetfor
optimalviewingofimages.
Select
theAutoContrastcheckbox.Ifimagesarestill
notoptimal,readjustthecontrastsliders.SeeViewing
ScanResultsonpage49.
Cause Resolution
Monitorisnotadjustedfor
displayedresolution.
Thishasnoeffectonyourdata.Usethehorizontaland
verticalsizecontrolsofyourmonitortomanipulatethe
appearanceof
asectionsoitappearsregular—thatis,all
sidesarethesamelength.
Besureyourvideodriver resolutionissetto
1280x1024.