dataset05: John Thompson FROC dataset

In dpc10ster/RJafroc: Artificial Intelligence Systems and Observer Performance

John Thompson FROC dataset

Description

This is referred to in the book as the "JT" dataset. It consists of 92 cases, 47 of which are diseased, interpreted in two treatments ("1" = CT images acquired for attenuation correction, "2" = diagnostic CT images), by nine radiographers using the FROC paradigm. Each case was a slice of an anthropomorphic phantom 47 with inserted nodular lesions (max 3 per slice). The maximum number of NLs per case, over the entire dataset was 7.

Usage

dataset05

Format

A list with 3 elements: $ratings, $lesions and $descriptions; $ratings contain 3 elements, $NL, $LL and $LL_IL as sub-lists; $lesions contain 3 elements, $perCase, $IDs and $weights as sub-lists; $descriptions contain 7 elements, $fileName, $type, $name, $truthTableStr, $design, $modalityID and $readerID as sub-lists;

• rating$NL num Array[1:2, 1:9, 1:92, 1:7] ratings of non-lesion localizations NLs

• rating$LL num Array[1:2, 1:9, 1:47, 1:3] ratings of lesion localizations LLs

• rating$LL_IL NA, This placeholder is used only for LROC data

• lesions$perCase int Array[1:47], number of lesions per diseased case

• lesions$IDs num Array[1:47, 1:3], numeric labels of lesions on diseased cases

• lesions$weights num Array[1:47, 1:3], weights (or clinical importance) of lesions

• descriptions$fileName chr "dataset05" base name of dataset in 'data' folder

• descriptions$type chr "FROC" the data type

• descriptions$name chr "THOMPSON", the name of the dataset

• descriptions$truthTableStr num Array[1:2, 1:9, 1:92, 1:4] truth table structure

• descriptions$design chr "FCTRL" study design factorial dataset

• descriptions$modalityID chr Array[1:2] "1" "2", modality labels

• descriptions$readerID chr Array[1:4] the reader labels

References

Thompson JD Hogg P, et al. (2014) A Free-Response Evaluation Determining Value in the Computed Tomography Attenuation Correction Image for Revealing Pulmonary Incidental Findings: A Phantom Study. Academic Radiology, 21 (4): 538-545.

Examples

res <- str(dataset05)
## PlotEmpOpChr(dataset = dataset05, opChType = "wAFROC")$Plot

dpc10ster/RJafroc documentation built on June 13, 2025, 10:07 p.m.