Erik L. Ridley

[email protected]

Week in Review: Right to repair in NC | LCS for nonsmokers | Do women want mammo AI?

Our most highly viewed articles last week included coverage of a right-to-repair bill for imaging equipment and the potential benefit of lung cancer screening for nonsmokers.

April 26, 2025

AI produces synthetic 3T MR images from portable scans

Findings show that AI could potentially expand the utility of neuroimaging on portable MRI systems.

April 22, 2025

Figure: Improved image quality with a generative adversarial network architecture for low- to high-field-strength image translation, called LowGAN. (A–C) Top: High-field-strength (3-T) and low-field-strength (64-mT) images and LowGAN outputs for a single participant across (A) fluid-attenuated inversion recovery (FLAIR), (B) T1-weighted (T1w), and (C) T2-weighted (T2w) contrasts. Bottom: Graphs demonstrate the structural similarity index (SSIM), peak signal-to-noise ratio (PSNR), normalized cross-correlation (NCC), and feature similarity index (FSIM) between high field strength and low field strength (64-mT) and high field strength and LowGAN outputs. a.u. = arbitrary units.****p ≤ 0.0001. Images and caption courtesy of Radiology and the RSNA.

Week in Review: CT and cancer risk | AI-guided POCUS for TB | Best way to use AI in LDCT

Our top stories this week featured research projecting cancer cases from CT scans and effective ways to use AI.

April 18, 2025

Can LLMs help track interval changes on radiology reports?

Large-language models (LLMs) show potential for tracking interval changes on longitudinal radiology reports.

April 14, 2025

Artificial Intelligence Ai Global Communication Network

Week in Review: Impact of trade war on radiology | Jury award | PET shows how music affects brain

In response to U.S. tariffs, China is limiting the export of rare earth elements, including some used in medical imaging and treatments. Click "Read More" for that story, plus coverage of a malpractice case and PET imaging of the brain on music.

April 11, 2025

Week in Review: AI speeds up fetal ultrasound | Low-risk CAC scores | PET scan timing after radiotherapy

AI's utility for fetal ultrasound and the persistent health benefits of low-risk CAC scores into old age topped the list of most popular stories on AuntMinnie.com last week.

April 4, 2025

China limits exports of rare earth elements, targets CT x-ray tubes

China's Ministry of Commerce has announced export controls for several rare earth elements and launched investigations of imported CT x-ray tubes.

April 4, 2025

Week in Review: New PET method for Alzheimer’s | Match Day 2025 | Closing the loop with referrals

Our top stories of the week featured coverage of a brain PET technique for Alzheimer's disease and a report on how radiology fared on Match Day 2025.

March 28, 2025

Week in Review: FAPI-PET for detecting bone metastases | Multivitamins and breast density | Reaction to CR

Our most popular stories this week included reports on the performance of FAPI PET/CT for detecting bone metastases and a study on multivitamin supplement use and mammographic breast density.

March 21, 2025

Do radiologists trust mammography AI software?

A large-scale prospective trial exploring the use of mammography AI software in a breast cancer screening program has found that recalls were lower when cases were flagged by AI.

March 18, 2025

Full-field digital screening mammograms in participants recalled by the consensus discussion after being flagged by artificial intelligence (AI) computer-aided detection (CAD) but not by either of the two radiologists. (A) Mammogram with AI CAD score of 73 for a 55-year-old woman diagnosed with grade 3 in situ cancer and T1 (9-mm) invasive cancer in the left breast and lymph node metastasis. (B) Mammogram with AI CAD score of 54 for a 49-year-old woman diagnosed with grade 2 in situ cancer and T1 (6-mm) invasive cancer in the right breast and without lymph node metastasis. All images and caption courtesy of the RSNA.

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Breast Screening Van 400 (1)

ARRS: Mobile mammo boosts breast screening, no-show rate still high

Free mobile screening mammography improves breast screening access for uninsured women, but doesn't lead to follow-up adherence.

Amie Lee, MD, presented at ARRS 2025 on managing 'controversial' high-risk breast lesions diagnosed on core needle biopsy. This slide outlines how to manage pleomorphic lobular carcinoma in situ (LCIS) via surgical excision.

ARRS: How to manage 'controversial' high-risk breast lesions

Images show a palpable mass in the left breast in a 55-year-old woman. (A) Mammography shows a 26-mm ill-defined mass with fine linear calcifications in the central portion of the left breast (arrows). (B) ultrasound shows a 23-mm hypoechoic mass with calcifications in the corresponding area accompanying palpability (between the arrows). (C) An axial, fat-saturated, contrast-enhanced T1-weighted MRI scan shows an 18-mm irregular heterogeneous enhancing mass in the left breast (arrows). After breast-conserving surgery, the final pathologic report confirmed a grade II estrogen receptor–negative, progesterone receptor–negative, human epidermal growth factor receptor 2–positive invasive ductal carcinoma. There was no lymphovascular invasion, and the resection margins were clear. The patient declined both adjuvant chemotherapy and radiation therapy due to psychologic distress. (D) 11 months later, surveillance ultrasound helped to detect a new 25-mm irregular hypoechoic mass at the 12-o’clock position in the left breast (arrows). A subsequent ultrasound-guided biopsy confirmed it as a recurrence of grade II invasive ductal carcinoma, maintaining the same receptor statuses. Images courtesy of the RSNA.

Preop MRI fails to deliver results for breast cancer subtype

Representative images from diagnostic analysis of deep learning (DL)-based CT myocardial perfusion imaging (MPI). (A-D) Representative images in a 51-year-old woman with stable angina at presentation. (A) Curved planar reformation and (B) three-dimensional maximum intensity projection images show severe stenosis of the opening left anterior descending artery (arrow). (C) Fractional flow reserve (FFR) determined with invasive coronary angiography helps confirm that there was no hemodynamic significance of the opening left anterior descending artery lesion (arrow). (D) Dynamic CT MPI provided functional information to identify hemodynamically significant stenosis with reference to invasive FFR. Myocardial blood flow (MBF) derived from DL-based CT MPI revealed the absence of decreased myocardial perfusion of the left anterior descending artery territory (the areas outlined in black represent the myocardium subtended by the left anterior descending stenosis, and the color bar is a graphical scale that maps MBF ranges). (E-H) Representative images in a 62-year-old man with exertional chest pain at presentation. (E) Curved planar reformation and (F) three-dimensional maximum intensity projection images show moderate stenosis of the middle left anterior descending artery (arrow). (G) FFR determined at invasive coronary angiography helps confirm that the middle left anterior descending lesion was hemodynamically significant (arrow). (H) Dynamic CT MPI provided functional information to identify hemodynamically significant stenosis with reference to invasive FFR. DL-based CT MPI showed a reduction in MBF within the middle and basal anterior wall of the left anterior descending artery territory (the areas outlined in black represent the myocardium with decreased perfusion, and the color bar is a graphical scale that maps MBF ranges). MBFDL = MBF derived from the DL model.

DL model can aid in diagnosing myocardial ischemia

Lung Cancer

ARRS: Radiologists can help PCPs boost lung cancer screening rates

ARRS: Mobile mammo boosts breast screening, no-show rate still high

By Amerigo Allegretto

Free mobile screening mammography improves breast screening access for uninsured women, but doesn't lead to follow-up adherence.

April 30, 2025

Breast Screening Van 400 (1)

ARRS: How to manage 'controversial' high-risk breast lesions

By Amerigo Allegretto

Managing high-risk breast lesions with no consensus can be tricky, but breast radiologists can navigate this area.

April 30, 2025

Amie Lee, MD, presented at ARRS 2025 on managing 'controversial' high-risk breast lesions diagnosed on core needle biopsy. This slide outlines how to manage pleomorphic lobular carcinoma in situ (LCIS) via surgical excision.

Preop MRI fails to deliver results for breast cancer subtype

Preoperative MRI didn't improve outcomes in women with HER2-positive and hormone receptor-negative breast cancer in a new study.

April 29, 2025

Images show a palpable mass in the left breast in a 55-year-old woman. (A) Mammography shows a 26-mm ill-defined mass with fine linear calcifications in the central portion of the left breast (arrows). (B) ultrasound shows a 23-mm hypoechoic mass with calcifications in the corresponding area accompanying palpability (between the arrows). (C) An axial, fat-saturated, contrast-enhanced T1-weighted MRI scan shows an 18-mm irregular heterogeneous enhancing mass in the left breast (arrows). After breast-conserving surgery, the final pathologic report confirmed a grade II estrogen receptor–negative, progesterone receptor–negative, human epidermal growth factor receptor 2–positive invasive ductal carcinoma. There was no lymphovascular invasion, and the resection margins were clear. The patient declined both adjuvant chemotherapy and radiation therapy due to psychologic distress. (D) 11 months later, surveillance ultrasound helped to detect a new 25-mm irregular hypoechoic mass at the 12-o’clock position in the left breast (arrows). A subsequent ultrasound-guided biopsy confirmed it as a recurrence of grade II invasive ductal carcinoma, maintaining the same receptor statuses. Images courtesy of the RSNA.

DL model can aid in diagnosing myocardial ischemia

A deep-learning (DL) model can automatically measure myocardial blood flow on CT scans to help diagnose myocardial ischemia.

April 29, 2025

Representative images from diagnostic analysis of deep learning (DL)-based CT myocardial perfusion imaging (MPI). (A-D) Representative images in a 51-year-old woman with stable angina at presentation. (A) Curved planar reformation and (B) three-dimensional maximum intensity projection images show severe stenosis of the opening left anterior descending artery (arrow). (C) Fractional flow reserve (FFR) determined with invasive coronary angiography helps confirm that there was no hemodynamic significance of the opening left anterior descending artery lesion (arrow). (D) Dynamic CT MPI provided functional information to identify hemodynamically significant stenosis with reference to invasive FFR. Myocardial blood flow (MBF) derived from DL-based CT MPI revealed the absence of decreased myocardial perfusion of the left anterior descending artery territory (the areas outlined in black represent the myocardium subtended by the left anterior descending stenosis, and the color bar is a graphical scale that maps MBF ranges). (E-H) Representative images in a 62-year-old man with exertional chest pain at presentation. (E) Curved planar reformation and (F) three-dimensional maximum intensity projection images show moderate stenosis of the middle left anterior descending artery (arrow). (G) FFR determined at invasive coronary angiography helps confirm that the middle left anterior descending lesion was hemodynamically significant (arrow). (H) Dynamic CT MPI provided functional information to identify hemodynamically significant stenosis with reference to invasive FFR. DL-based CT MPI showed a reduction in MBF within the middle and basal anterior wall of the left anterior descending artery territory (the areas outlined in black represent the myocardium with decreased perfusion, and the color bar is a graphical scale that maps MBF ranges). MBFDL = MBF derived from the DL model.

ARRS: Radiologists can help PCPs boost lung cancer screening rates

By Kate Madden Yee

Radiologists can help boost lung cancer screening uptake by educating and supporting their primary care provider peers (PCP).

April 29, 2025

ARRS: 'Neurotheranostics' may be new frontier for nuclear medicine

Advances in brain PET imaging combined with new treatments for Alzheimer’s have given rise to a new concept of "neurotheranostics."

April 29, 2025

A conceptual framework for neurotheranostics.

ARRS: Rib uptake evaluation on F-18 DCFPyL PET/CT presents challenges

By Maryam Payne

Evaluating increased rib uptake on F-18 DCFPyL PET/CT in prostate cancer patients may lead to false positives.

April 28, 2025

ARRS: Most women OK with mammo data used to assess cancer risk

By Amerigo Allegretto

Most women are comfortable with having their mammogram data be used to calculate lifetime breast cancer risk

April 28, 2025

Mammogram Breast

ARRS: 'Report Cards' reduce BIRADS 3 usage

By Maryam Payne

"Report cards” were found to reduce rates of BI-RADS 3 assessment use, according to an award-winning poster presentation at ARRS 2025.

April 28, 2025

Breast Specialist Ultrasound Exam 400

ARRS: MASLD diagnosis may be subject to racial factors

By Kate Madden Yee

The diagnosis of metabolic-associated steatotic liver disease (MASLD) may be influenced by ethnic, racial, and social factors.

April 28, 2025

Liver Disease Stages

Mammo uptake among veterans on par with nonveterans

By Amerigo Allegretto

Female veterans are as likely to undergo screening mammography as nonveteran women.

April 25, 2025

Mammogram Patient

SPECT/CT predicts overall survival in Pluvicto patients

New evidence supports using SPECT/CT scans along with serum PSA levels to evaluate early patient responses to Pluvicto treatment.

April 25, 2025

Patient examples of SPECT/CT and PET/CT RECIP 1.0. (A) SPECT and PET maximum-intensity projection (MIP) images in 74-year-old man with mCRPC. Serum PSA level at baseline was 449 ng/mL and slightly increased to 525 ng/mL after two cycles of Lu-177 PSMA. Eastern Cooperative Oncology Group (ECOG) score was 2 at baseline and increased to 3 after 2 cycles. The patient was classified by readers as RECIP-progressive disease on both SPECT and PET. Overall survival was 4.7 months. Two cycles of Lu-177 PSMA were administered. (B) SPECT and PET MIP images in 74-year-old man with mCRPC. Serum PSA level was 231 ng/mL at baseline and decreased to 12.5 ng/mL after 2 cycles of Lu-177 PSMA. ECOG score was less than 2 at baseline and after 2 cycles of Lu-177 PSMA. The patient was classified by readers as RECIP-partial response on both SPECT and PET. Overall survival was 14.3 months. Four cycles of Lu-177 PSMA were administered.

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