dataset05: John Thompson FROC dataset

In 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 [1:2, 1:9, 1:92, 1:7], ratings of non-lesion localizations, NLs

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

• rating$LL_ILNA, this placeholder is used only for LROC data

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

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

• lesions$weights, num [1:47, 1:3], weights (or clinical importances) 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 [1:2, 1:9, 1:92, 1:4], truth table structure

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

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

• descriptions$readerID, chr [1:4] "1" "2" "3" "4", 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

str(dataset05)
PlotEmpiricalOperatingCharacteristics(dataset = dataset05, opChType = "wAFROC")$Plot

RJafroc documentation built on Nov. 10, 2022, 5:45 p.m.