dataset04 {RJafroc}

Federica Zanca FROC dataset

Description

This is referred to in the book as the "FED" dataset. It consists of 200 mammograms, 100 of which contained one to 3 simulated microcalcifications, interpreted in five treatments (basically different image processing algorithms) by four radiologists using the FROC paradigm and a 5-point rating scale. The maximum number of NLs per case, over the entire dataset was 7 and the dataset contained at least one diseased mammogram with 3 lesions. The Excel file containing this dataset is /inst/extdata/datasets/FZ_ALL.xlsx. The normal cases are labeled 100:199 while the normal cases are labeled 0:99.

Usage

dataset04

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 [1:5, 1:4, 1:200, 1:7], ratings of non-lesion localizations, NLs

• rating$LL, num [1:5, 1:4, 1:100, 1:3], ratings of lesion localizations, LLs

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

• lesions$perCase, int [1:100], number of lesions per diseased case

• lesions$IDs, num [1:100, 1:3], numeric labels of lesions on diseased cases

• lesions$weights, num [1:100, 1:3], weights (or clinical importances) of lesions

• descriptions$fileName, chr, "dataset04", base name of dataset in 'data' folder

• descriptions$type, chr "FROC", the data type

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

• descriptions$truthTableStr, num [1:5, 1:4, 1:200, 1:4], truth table structure

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

• descriptions$modalityID, chr [1:5] "1" "2" "3" "4" "5", treatment labels

• descriptions$readerID, chr [1:4] "1" "3" "4" "5", reader labels

References

Zanca F et al. Evaluation of clinical image processing algorithms used in digital mammography. Medical Physics. 2009;36(3):765-775.

Examples

str(dataset04)
PlotEmpiricalOperatingCharacteristics(dataset = dataset04, opChType = "wAFROC")$Plot