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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Examples of ultrasound findings and techniques. (A) Images in a 39-year-old male patient with a mass in the left thigh. The mass is heterogeneous on the B-mode US image (compared with the patient in D) and showed increased microvascularity (superb microvascular imaging [SMI]) and shear-wave elastography (SWE) values. Undifferentiated pleomorphic sarcoma was diagnosed at biopsy (with pleomorphic rhabdomyosarcoma in surgical specimen). (B) Images in an 18-year-old male patient with a mass in the left leg. The mass is hypoechoic on the B-mode image, with no other findings suggestive of malignancy. The lesion is in contact with the cortex of the tibia, which is slightly irregular. CT revealed a doubtful anteromedial tibial erosion. The microvascular study demonstrated high vascularization, suggestive of malignancy. Periosteal Ewing sarcoma was diagnosed with both histologic and immunohistochemical confirmation. (C) Images in a 69-year-old female patient with a lump growing on the outside of the left leg. Multiple SWE examinations were performed (please note the high values obtained in the measurements, whereas the color map highlights the stiffness relative to adjacent tissues). SMI showed areas of increased vascularization to target for sampling. Undifferentiated spindle cell sarcoma was diagnosed at biopsy, with residual leiomyosarcoma in the surgical specimen after neoadjuvant therapy. (D) Images in a 56-year-old female patient with a mass in the right thigh. The mass is heterogeneous at both B-mode ultrasound (similar to patient A) and MRI (coronal T2-weighted spectral attenuated inversion recovery [SPAIR]; T1-weighted pre-contrast and postcontrast imaging), which even shows uptake after the administration of paramagnetic contrast material, which is traditionally suggestive of malignancy. Low values at SMI and elastography are suggestive of benignity. Spindle cell lipoma was diagnosed at biopsy, with atypical spindle cell lipomatous tumor in the surgical specimen.
Ultrasound
Advanced ultrasound techniques improve soft tissue tumor evaluation
Both SWE and SMI can help distinguish benign from malignant soft tissue tumors.
Serial axial chest CT scans demonstrating the longitudinal evolution of small pure ground-glass nodules (pGGNs) incidentally detected during a routine wellness assessment. (A) Images in a 37-year-old woman with a family history of lung cancer show a nodule with the progressive growth pattern (box). The baseline CT scan, obtained in October 2017, demonstrates a pure ground-glass nodules in the right lower lobe. Consecutive CT scans obtained from 2017 to 2022 show the continuous enlargement of the nodule during active surveillance. The maximum diameter of the nodule increased from 5.6 mm in 2017 to 10.2 mm in 2022. (B) Images in a 45-year-old man show a nodule with the indolent growth pattern (box). The baseline CT scan, obtained in April 2018, demonstrates a pure ground-glass nodules in the left lower lobe. Consecutive CT scans obtained from 2019 to 2023 show that the nodule remained radiographically stable during CT surveillance. The maximum diameter of the nodule was 5.4 mm in 2018 and 6.1 mm at the final surveillance scan in 2023.
CT
CT reveals progressive growth pattern in incidental lung nodules
Acquisitions
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Radiology Partners to acquire Everlight Radiology in $1 billion deal
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Medicolegal
Former Philips engineer convicted of x-ray trade secret theft
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Advanced ultrasound techniques improve soft tissue tumor evaluation
By Amerigo Allegretto
Both SWE and SMI can help distinguish benign from malignant soft tissue tumors.
August 26, 2026
Examples of ultrasound findings and techniques. (A) Images in a 39-year-old male patient with a mass in the left thigh. The mass is heterogeneous on the B-mode US image (compared with the patient in D) and showed increased microvascularity (superb microvascular imaging [SMI]) and shear-wave elastography (SWE) values. Undifferentiated pleomorphic sarcoma was diagnosed at biopsy (with pleomorphic rhabdomyosarcoma in surgical specimen). (B) Images in an 18-year-old male patient with a mass in the left leg. The mass is hypoechoic on the B-mode image, with no other findings suggestive of malignancy. The lesion is in contact with the cortex of the tibia, which is slightly irregular. CT revealed a doubtful anteromedial tibial erosion. The microvascular study demonstrated high vascularization, suggestive of malignancy. Periosteal Ewing sarcoma was diagnosed with both histologic and immunohistochemical confirmation. (C) Images in a 69-year-old female patient with a lump growing on the outside of the left leg. Multiple SWE examinations were performed (please note the high values obtained in the measurements, whereas the color map highlights the stiffness relative to adjacent tissues). SMI showed areas of increased vascularization to target for sampling. Undifferentiated spindle cell sarcoma was diagnosed at biopsy, with residual leiomyosarcoma in the surgical specimen after neoadjuvant therapy. (D) Images in a 56-year-old female patient with a mass in the right thigh. The mass is heterogeneous at both B-mode ultrasound (similar to patient A) and MRI (coronal T2-weighted spectral attenuated inversion recovery [SPAIR]; T1-weighted pre-contrast and postcontrast imaging), which even shows uptake after the administration of paramagnetic contrast material, which is traditionally suggestive of malignancy. Low values at SMI and elastography are suggestive of benignity. Spindle cell lipoma was diagnosed at biopsy, with atypical spindle cell lipomatous tumor in the surgical specimen.
CT reveals progressive growth pattern in incidental lung nodules
By Will Morton
This pattern is most associated with a family history of lung cancer.
August 25, 2026
Serial axial chest CT scans demonstrating the longitudinal evolution of small pure ground-glass nodules (pGGNs) incidentally detected during a routine wellness assessment. (A) Images in a 37-year-old woman with a family history of lung cancer show a nodule with the progressive growth pattern (box). The baseline CT scan, obtained in October 2017, demonstrates a pure ground-glass nodules in the right lower lobe. Consecutive CT scans obtained from 2017 to 2022 show the continuous enlargement of the nodule during active surveillance. The maximum diameter of the nodule increased from 5.6 mm in 2017 to 10.2 mm in 2022. (B) Images in a 45-year-old man show a nodule with the indolent growth pattern (box). The baseline CT scan, obtained in April 2018, demonstrates a pure ground-glass nodules in the left lower lobe. Consecutive CT scans obtained from 2019 to 2023 show that the nodule remained radiographically stable during CT surveillance. The maximum diameter of the nodule was 5.4 mm in 2018 and 6.1 mm at the final surveillance scan in 2023.
Radiology Partners to acquire Everlight Radiology in $1 billion deal
By AuntMinnie.com staff writers
Radiology Partners said it intends to make its Mosaic Drafting AI tool available to Everlight radiologists.
August 25, 2026
Acquisitions
Former Philips engineer convicted of x-ray trade secret theft
By AuntMinnie.com staff writers
Chih-Yee Jen, 71, worked at Philips' Aurora, IL facility developing x-ray tubes for CT scanners under the company's Dunlee brand.
August 26, 2026
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Thymic health should be considered for radiotherapy planning
By Amerigo Allegretto
New evidence shows that unintended radiation exposure to the thymus during lung cancer treatment may lead to worse outcomes.
August 26, 2026
Radiation Treatment Cancer 400 (2)
Malpractice suits tied to diagnostic errors, rising costs
By Will Morton
Radiology malpractice claims were more likely than those in other specialties to involve diagnostic errors (71.3% versus 27.6%).
August 26, 2026
Legal
Podcast: Where do MRI accident reports go?
By Liz Carey
MRI insiders quickly learned about the 2023 MRI accident in which a nurse was pinned to an MRI scanner by an ICU bed.
August 25, 2026
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Interventional radiology tops compensation growth in 2025
By AuntMinnie.com staff writers
Interventional radiology led all specialties in compensation growth while radiology continues to be a specialty in high demand.
August 25, 2026
Money Bills 400
MRI detects ARIA in 21% of real-world donanemab patients
By Will Morton
Of the 48 patients who underwent at least one surveillance MRI, 10 (21%) had an ARIA detected.
August 24, 2026
Alz D
What independent clinics need to know before buying a CT scanner
By Joe Mason, Brandon Bush
In a new column, Brandon Bush and Joe Mason of Arineta offer CT purchasing advice for independent practices.
August 24, 2026
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Radiotherapy access could address gynecological cancer disparities
By Amerigo Allegretto
Inadequate radiotherapy infrastructure is one of several drivers of gynecological cancer disparities in LMICs.
August 24, 2026
Radiotherapy 400
Food insecurity linked to higher risk of death in breast cancer
By Will Morton
Food-insecure regions are where people lack consistent access to enough affordable, nutritious food.
August 21, 2026
Food Insecurity
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