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- W2080355843 abstract "As part of a study to establish whether detection of cranial vault fractures is affected by JPEG 2000 30:1 and 60:1 lossycompression when compared to JPEG 2000 lossless compression we looked at the effects on confidence ratings 55 CTimages, with three levels of JPEG 2000 compression (lossless, 30:1 & 60:1) were presented to 14 senior radiologists, 12from the American Board of Radiology and 2 form Australia, 7 of whom were MSK specialists and 7 wereneuroradiologists. 32 Images contained a single skull fracture while 23 were normal. Images were displayed on onecalibrated, secondary LCD, in an ambient lighting of 32.2 lux. Observers were asked to identify the presence or absenceof a fracture and where a fracture was present to locate and rate their confidence in its presence. A jack-knifed alternatefree-response receiver operating characteristic (JAFROC) and a ROC methodology was employed and the DBM MRMCand ANOVA were used to explore differences between the lossless and lossy compressed images. A significant trend ofincreased confidence in true and false positive scores was seen with JPEG2000 Lossy 60:1 compression. An ANOVA onthe mean confidence rating obtained for correct (TP) and incorrect (FP) localization skull fractions demonstrated that thiswas a significant difference between lossless and 60:1 [FP, p<0.001; TP, p<0.014] and 30:1 and 60:1 [FP, p<0.014; TP,p<0.037]." @default.
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- W2080355843 date "2012-02-20" @default.
- W2080355843 modified "2023-09-26" @default.
- W2080355843 title "The effect of compression on confidence during the detection of skull fractures in CT" @default.
- W2080355843 doi "https://doi.org/10.1117/12.913748" @default.
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