The Color Scale Study repository contains the raw data files with the individual readers answer to each case and the ground truth. For information about the methods used for this work please refer to:

• Citation: Zabala-Travers S, Gallas BD, Busoni S, Williams MC, Noferini L, Fedeli L, Lucarini S, Galastri L, Mirsadraee S, Badano A. Display colour scale effects on diagnostic performance and reader agreement in cardiac CT and prostate apparent diffusion coefficient assessment. Clinical radiology. 2019 Jan 1;74(1):79-e1.

Please cite this article if data from this repository is used for your research.

Data is divided in 4 files. Two files for the study with Cardiac CT images and 2 files for the Prostate MRI images.

• 3 modalities color scales: Grayscale, Rainbow, Hotiron.

• 12 readers (observers) Readers had different experience level, which is referenced in the reader nickname as High and Low, for high and low level of experience, respectively.

• 210 cases 105 positive for lesion.

• Study was not fully crossed. There were three groups of readers, and each group read 35 positive and 35 negative cases.

• 5 modalities color scales: Grayscale, Rainbow, Hotiron, Rainbow read with GSDF, Hotiron read with GSDF.

• 9 readers (observers) Readers had different experience level, which is referenced in the reader nickname as High, Med and Low, for high, medium and low level of experience, respectively.

• 165 cases 66 positive for lesion.

• Study was not fully crossed. There were three groups of readers, and each group read 22 positive and 22 negative cases.

• Cardio Study_truth.csv

  • Each row corresponds to a case

  • From left to right each column corresponds to case number and truth. 1 is assigned to cases with lesion (positive cases) and 0 to cases without lesion (negative cases).

• CardioCTstudy_3mod_12obs_210cases_rawdata.csv

  • Each row corresponds to an observation in the study (one reader assigns a confidence score to one case).

  • From left to right each column corresponds to reader, case number, modality (color scale), confidence score assigned. Grayscale was evaluated using GSDF settings and Rainbow and Hotiron using RGB settings.

• Prostate_Truth.csv

  • Each row corresponds to a case.

  • From left to right each column corresponds to case number and truth. 1 is assigned to cases with lesion (positive cases) and 0 to cases without lesion (negative cases).

• Prostate_5mod_9obs_165cases_wGSDFrawdata_Allreaders.csv

  • Each row corresponds to an observation in the study (one reader assigns a confidence score to one case).

  • From left to right each column corresponds to reader, case number, modality (color scale), confidence score assigned. Unless otherwise stated in the modality name Grayscale was evaluated using GSDF settings and Rainbow and Hotiron using RGB settings.