iMRMC

2.1.0

Multi-Reader, Multi-Case Analysis Methods (ROC, Agreement, and Other Metrics)

1packages depend

3.7Kdownloads / year

69.0%test coverage

13/13checks pass

Overview

About

Maintained by Brandon GallasFirst published 2017-12-129 releasesCRAN page ↗GitHub ↗

This software does Multi-Reader, Multi-Case (MRMC) analyses of data from imaging studies where clinicians (readers) evaluate patient images (cases). What does this mean? ... Many imaging studies are designed so that every reader reads every case in all modalities, a fully-crossed study. In this case, the data is cross-correlated, and we consider the readers and cases to be cross-correlated random effects. An MRMC analysis accounts for the variability and correlations from the readers and cases when estimating variances, confidence intervals, and p-values. The functions in this package can treat arbitrary study designs and studies with missing data, not just fully-crossed study designs. An overview of this software, including references presenting details on the methods, can be found here: https://www.fda.gov/medical-devices/science-and-research-medical-devices/imrmc-software-do-multi-reader-multi-case-statistical-analysis-reader-studies.

Install

R (CRAN)pak (dev)Ubuntu (r2u)openSUSE (OBS)

install.packages("iMRMC", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

if (!requireNamespace("pak", quietly = TRUE))
  install.packages("pak", repos = "https://cloud.r-project.org/")
pak::pak("DIDSR/iMRMC")

Development version from DIDSR/iMRMC. Installs pak first if it is not already available.

Release

# enable cranapt (r2u) if it is not already set up, then install
grep -rqs r2u.stat.illinois.edu /etc/apt/sources.list /etc/apt/sources.list.d/ \
  || curl -fsSL https://raw.githubusercontent.com/eddelbuettel/r2u/master/inst/scripts/add_cranapt_noble.sh | sudo bash
sudo apt install -y r-cran-imrmc

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled.

bspm (used by r2u) also needs make: sudo apt install make

# add the autoCRAN OBS repo (Tumbleweed) if it is missing, then install
zypper -q lr | grep -qi autoCRAN \
  || sudo zypper addrepo https://download.opensuse.org/repositories/devel:/languages:/R:/autoCRAN/openSUSE_Tumbleweed/devel:languages:R:autoCRAN.repo
sudo zypper install -y R-iMRMC

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed).

Health

CRAN checks

13OK

Slowest check: 2.7 min · r-devel-linux-x86_64-fedora-clang

Check history

OK2026-04-25
12 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
NOTE2026-03-10
11 OK · 3 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

Documentation signals are not tracked yet for this package.

Downloads

3.7K

CRAN downloads in the past year

Rank #11,606 · ~10/day · ~305/mo

iMRMC Releases R versions

Daily download trend is not available in this view yet.

30930 days

89790 days

3.7K1 year

Compare downloads with other packages →

Also on200 r2u40 autocran

Repository

GitHub ↗ didsr/imrmc

31Stars

16Forks

25Open issues

0Open PRs

13Releases

1,294Commits

18Contributors

1,294 commits · Last activity 2026-07-22

Repository practices

Upstream repositoryBeta

2 development-tooling and community-health practices detected across 2 families in the upstream repository

Checks run against github.com/didsr/imrmc on 2026-07-19.

Governance and community (1)

Security policy

Git structural (1)

.gitattributes

How this is detected·Detection ruleset v1 (2026-07-18)

Dependencies

Declared dependencies

1 external dependency (excludes base and recommended)

Depends (1)

R >= 3.5.0

Imports (4)

parallelMatrixstatsutils

LinkingTo (0)

none

Suggests (1)

testthat

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

1direct

0indirect

NestMRMC

Code & Tests

Datasets

People & History

People (1)

Maintainer (1)

Brandon Gallas

Author, Maintainer

Authors (1)

Brandon Gallas

Author, Maintainer

Package Timeline

9 releases. R releases are shown for context.

R
R 4.6.0 released · 2026-04-24
R
R 4.5.0 released · 2025-04-11
2.1.0Latest
2024-09-02 · current release · diff ↗
2.0.0
2024-05-23 · diff ↗
R
R 4.4.0 released · 2024-04-24
1.2.5
2023-05-15 · diff ↗
R
R 4.3.0 released · 2023-04-21
R
R 4.2.0 released · 2022-04-22
1.2.4
2022-02-24 · diff ↗
1.2.3
2021-07-15 · diff ↗
R
R 4.1.0 released · 2021-05-18
R
R 4.0.0 released · 2020-04-24
1.2.2
2020-03-24 · diff ↗
1.2.1
2020-01-20 · diff ↗
unarchivedReturned to CRAN
2020-01-20
archivedRemoved from CRAN
2020-01-17
check issues were not corrected in time Check failures on macOS

Show 5 earlier events

R
R 3.6.0 released · 2019-04-26
1.2.0
2019-04-19 · diff ↗
R
R 3.5.0 released · 2018-04-23
1.1.0
2017-12-12
R
R 3.4.0 released · 2017-04-21

Package metadata

First published: 2017-12-12
Total releases: 9 / 9 yrs
License: CC0
Download size: 4.7 MB
Installed size: not tracked yet
With dependencies: not tracked yet

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