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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Emergency 400
Emergency Radiology
ED patients prefer empathetic communication for incidental findings
Incorporating patient preferences into communication may improve understanding and follow-up in addressing incidental findings.
Representative axial fused F-18 FDG-PET/MRI images and corresponding anatomic MRI images from a patient imaged at baseline and after initiation of androgen deprivation therapy are shown. Each row displays a distinct vascular territory. White arrows indicate focal areas of increased tracer uptake within the arterial wall, where spherical volumes of interest (VOIs) were placed for maximum standardized uptake value (SUVmax) measurement. Additional VOIs were placed in the superior vena cava and inferior vena cava for blood-pool activity sampling. SUVmax values from the arterial VOIs were extracted on the corresponding PET images and normalized to the blood-pool mean standardized uptake value to derive the maximum target-to-background ratio.
Molecular Imaging
PET/MRI detects arterial inflammation in prostate cancer patients
Minnie Cast Thumbnail (17)
Womens Imaging
Women's Imaging MinnieCast, Episode 14: GLP-1s and breast cancer risk
Pacs Man Pontification
Enterprise Imaging
Podcast: The PACSMan Pontificates, Episode 4: The perfect PACS
Heart 1
CT
Nongated CT scans can predict heart disease risk
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ED patients prefer empathetic communication for incidental findings
By Amerigo Allegretto
Incorporating patient preferences into communication may improve understanding and follow-up in addressing incidental findings.
July 31, 2026
Emergency 400
PET/MRI detects arterial inflammation in prostate cancer patients
By Will Morton
Androgen deprivation therapy (ADT) is widely used in advanced prostate cancer, yet is associated with increased cardiovascular events such as stroke and heart attacks.
July 31, 2026
Representative axial fused F-18 FDG-PET/MRI images and corresponding anatomic MRI images from a patient imaged at baseline and after initiation of androgen deprivation therapy are shown. Each row displays a distinct vascular territory. White arrows indicate focal areas of increased tracer uptake within the arterial wall, where spherical volumes of interest (VOIs) were placed for maximum standardized uptake value (SUVmax) measurement. Additional VOIs were placed in the superior vena cava and inferior vena cava for blood-pool activity sampling. SUVmax values from the arterial VOIs were extracted on the corresponding PET images and normalized to the blood-pool mean standardized uptake value to derive the maximum target-to-background ratio.
Women's Imaging MinnieCast, Episode 14: GLP-1s and breast cancer risk
By Amerigo Allegretto
Elizabeth McDonald, MD, shares results from her team's study on how GLP-1s may have beneficial effects on breast cancer risk.
July 31, 2026
Minnie Cast Thumbnail (17)
Podcast: The PACSMan Pontificates, Episode 4: The perfect PACS
By Michael J. Cannavo
In episode 4 of his The PACSMan Pontificates podcast series, Michael J. Cannavo shares his thoughts on the quest for the perfect PACS.
July 30, 2026
Pacs Man Pontification
Nongated CT scans can predict heart disease risk
By Will Morton
Subjects with moderate and severe CAC scores on nongated CT had significantly higher risk of coronary heart disease risk.
July 30, 2026
Heart 1
TACE plus thermal ablation improves survival in liver cancer
By Will Morton
Median progression-free survival was 17.7 months with TACE-ablation versus 7.3 months with TACE alone.
July 30, 2026
Liver Cancer
MRI may help predict heart disease risk in patients with diabetes
By Amerigo Allegretto
The SCAN-MRI risk score outperformed established risk models.
July 29, 2026
Representative cardiac MRI strain images and analysis. Images in the two-, four-, and three-chamber views for strain analysis (left) and left ventricular global longitudinal strain (GLS) and global early diastolic longitudinal strain rate (eGLSR) curves (right) are shown. (A) Example images and GLS and eGLSR curves in a 37-year-old male participant with diabetes mellitus (DM) without events during follow-up after cardiac MRI. (B) Example images and GLS and eGLSR curves in a 45-year-old male participant with DM who had heart failure hospitalization during follow-up after cardiac MRI. In the left images, blue represents higher myocardial strain (higher absolute values of negative strain), whereas red represents reduced strain. In the curves, blue represents GLS, whereas orange represents eGLSR. The left y-axis denotes GLS (%), the right y-axis represents eGLSR (per second), and the x-axis denotes time (milliseconds). For these strain parameters, a lower absolute value indicates more severe myocardial functional impairment; accordingly, GLS and eGLSR were more impaired in participants with events compared with those without events.
SNMMI issues analysis of 2027 HOPPS proposed rule
By AuntMinnie.com staff writers
The proposed rule includes several positive code-level changes for nuclear medicine providers.
July 29, 2026
Snmmi
Ablative RT shows promise in treating pancreatic cancer
By Amerigo Allegretto
Ablative radiotherapy led to promising survival outcomes in patients with locally advanced pancreatic cancer.
July 29, 2026
Pancreas Cancerous Area 3 D Rendering Adobe Anton
CT radiation doses have fallen sharply over past decade
By Will Morton
The largest reductions appeared in chest examinations with contrast material, where diagnostic reference levels fell 31%.
July 28, 2026
Bar graphs show comparison of volume CT dose index (CTDIvol) (A) achievable doses (50th percentile) and (B) diagnostic reference levels (75th percentile) between 2014 (see reference 4 by Kanal et al) and 2025 (present study) for 10 common CT examination types performed without contrast (w/o) and with contrast (w/). Across all 10 adult CT examination categories, CTDIvol achievable doses and diagnostic reference levels generally decreased from 2014 to 2025, with the largest reductions for torso examinations (chest; abdomen-pelvis; and combined chest, abdomen, and pelvis), intermediate reductions for neck and cervical spine, and minimal change for head examinations.
CEM finds breast cancer at baseline, incidence screening
By Amerigo Allegretto
Incidence screening with CEM maintains high performance and may offer more benefits over baseline CEM screening.
July 28, 2026
Images in a 70-year-old asymptomatic woman with a prior excisional biopsy in the left breast yielding lobular carcinoma in situ 3 years earlier. Screening contrast-enhanced mammography (CEM) was performed, which was considered a prevalence screen as the woman had no prior breast MRI in the past 3 years and no prior CEM. (A) Low-energy (26–30 kVp) mediolateral oblique (MLO) and (B) craniocaudal (CC) views show surgical clips but no abnormality. (C) Recombined MLO and (D) CC images show an enhancing mass in the medial left breast (arrows). Biopsy revealed invasive lobular carcinoma. Size was 0.2 cm; tumor grade II/III; negative lymph nodes; and estrogen receptor–positive, progesterone receptor–positive, and human epidermal growth factor receptor 2–negative.
Podcast: Testing the effectiveness of today's MR safety standard of care
By Liz Carey
If today's MRI safety standard of care were followed, would MRI accidents be impossible, or nearly impossible?
July 28, 2026
The Invisible Force Podcast Album Cover Auntminnie Jan 2026 Thumbnails
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