Erik L. Ridley

ISMRM 2025
ISMRM: AI spots ischemic heart disease on low GBCA dose images
An AI-based framework was highly accurate for detecting myocardial ischemia, even on images acquired with 90% less gadolinium.
May 14, 2025
Representative stress perfusion CMR case with 80% contrast dose reduction. Pixel-wise MBF maps and AHA 16-segment bull's eye plots are shown for full-dose and reduced-dose acquisitions. When analyzed using the proposed MST deep learning method, the reduced-dose data closely matches the full-dose data across basal, mid, and apical slices. In contrast, Fermi-deconvolution shows good agreement in apical and mid slices but overestimates MBF in some basal segments, indicating reduced accuracy under low-dose conditions. Image courtesy of the ISMRM.
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Top Stories
Brain anatomy diagram showing temporal lobe, middle temporal gyrus, putamen, and globus pallidus with labeled cross-sections.
MRI
MRI, PET reveal distinct brain changes in loneliness and social isolation
Prior studies frequently have used the terms interchangeably and applied measures designed for one construct when investigating the other.
The Invisible Force MRI Incident Investigation Podcast cover with confidential marking and presenter badge
MRI
Podcast: Hospital accreditation isn’t a safety net for MRI
SIIM CAIMI 26 logo featuring teal text with turquoise and orange accents
AI
SIIM-CAIMI program chairs talk medical imaging AI's evolution
Baseline and 1-year follow-up CT and MRI scans of thoracic and lumbar spine with color-coded vertebral segmentation
CT
LDCT predicts vertebral fracture risk in heavy smokers
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MRI, PET reveal distinct brain changes in loneliness and social isolation
By Will Morton
Prior studies frequently have used the terms interchangeably and applied measures designed for one construct when investigating the other.
October 28, 2026
Brain anatomy diagram showing temporal lobe, middle temporal gyrus, putamen, and globus pallidus with labeled cross-sections.
Podcast: Hospital accreditation isn’t a safety net for MRI
By Erik L. Ridley
The Invisible Force podcast series co-hosts Tobias "Toby" Gilk and John Posh continue their investigation into a 2023 MRI accident.
October 28, 2026
The Invisible Force MRI Incident Investigation Podcast cover with confidential marking and presenter badge
SIIM-CAIMI program chairs talk medical imaging AI's evolution
By Amerigo Allegretto
SIIM-CAIMI's program chairs share their thoughts on the increasing use of AI tools such as large language models in practice.
October 28, 2026
SIIM CAIMI 26 logo featuring teal text with turquoise and orange accents
LDCT predicts vertebral fracture risk in heavy smokers
By Will Morton
Participants were heavy smokers aged 55 to 74 years old with at least 30 pack-years of smoking history.
October 27, 2026
Baseline and 1-year follow-up CT and MRI scans of thoracic and lumbar spine with color-coded vertebral segmentation
ChatGPT-5 misses half of distal radius fractures on x-rays
By Will Morton
ChatGPT-5 missed 83 fractures, demonstrating a sensitivity of 51.2% and a specificity of 70.5%, with overall accuracy of 61.6%.
October 27, 2026
Four wrist X-ray images showing fracture detection examples: true positive with distal radius fracture, true negative normal wrist, false positive misidentified fracture, and false negative missed fracture.
SIIM-CAIMI: AI triaging for ICH leads to faster turnaround times
By Amerigo Allegretto
AI triaging that examined head CT images led to a 13-minute faster report turnaround in the emergency department.
October 27, 2026
Female presenter delivering conference talk on AI and ICH outcomes at SIM event with projection screens
SIIM-CAIMI: 20% of advanced imaging prior auth denials get overturned
By Amerigo Allegretto
Advanced imaging prior authorization denials are overturned at a rate of five times that of all Medicare Advantage services.
October 27, 2026
PET/CT scan showing axial, sagittal, and coronal views with metabolic activity visualization in yellow and orange
RadNet to acquire teleradiology provider Onrad
By AuntMinnie.com staff writers
The deal is expected to close in early 2027.
October 26, 2026
Two businessmen in suits shaking hands in a professional office setting
Heartflow sues Elucid over cardiac CT patents, trade secrets
By AuntMinnie.com staff writers
Heartflow alleges that Elucid hired 11 of its employees who had knowledge of Heartflow’s product design.
October 26, 2026
Two professionals reviewing legal documents at a desk with a gavel during a business consultation
SIIM-CAIMI: Apollo LLM framework shows promise in patient monitoring
By Amerigo Allegretto
Faisal Mahmood, PhD, shared updates from his team's work developing the Apollo LLM framework.
October 26, 2026
Medical researcher presenting computational pathology findings at SIIM CAIRM26 conference with tissue analysis visualization
SIIM-CAIMI: LLM pipeline tracks critical results in pediatric patients
By Amerigo Allegretto
An in-house LLM approach achieved near-perfect sensitivity for detecting critical results in child patients.
October 26, 2026
Woman presenting at SIM CAIM26 conference podium with blue program schedule displayed on projection screen
DBT performance improves with patient age
By Amerigo Allegretto
DBT led to higher cancer detection rates and lower abnormal interpretation rates in older women in a study over 93,000 women.
October 23, 2026
Mammography and ultrasound imaging showing breast tissue with clinical findings marked by arrows
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