FDA finds new cases of CT radiation overexposure

Dec 6, 2009

The U.S. Food and Drug Administration said today that it has found additional cases of radiation overexposure related to CT brain perfusion scans. The new cases occurred at hospitals besides Cedars-Sinai Medical Center in Los Angeles and involve more than one CT manufacturer.

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Representative MRI scans for which the independently assigned imaging-derived extranodal extension (iENE) grades differed among the readers. (A) Axial and sagittal images in a 56-year-old male patient with nasopharyngeal carcinoma and cervical nodal metastases. Readers 1 and 3 interpreted the finding as a metastatic lymph node invading the left sternocleidomastoid muscle (arrow) and assessed an iENE grade of 3, whereas reader 2 assigned a grade of 2. After joint review, the radiologists reached a consensus on the absence of definite sternocleidomastoid muscle invasion, and the final iENE grade was 2. (B) Axial and sagittal images in a 52-year-old male patient with nasopharyngeal carcinoma and cervical nodal metastases. Reader 1 interpreted the findings as a single enlarged metastatic lymph node and assessed an iENE grade of 1, whereas readers 2 and 3 interpreted them as two coalescent metastatic lymph nodes (arrows) and assessed a grade of 2. After joint review, the radiologists reached a consensus on the coalescence of the two metastatic lymph nodes, and the final iENE grade was 2.

Image-based grading system estimates nasopharyngeal carcinoma severity

September 23, 2026

Sharp images, low dose, for young patients with the NAEOTOM Alpha class

Sharp images, low dose, for young patients with the NAEOTOM Alpha class

August 10, 2026

a2z Radiology secures FDA clearance for CT AI device

September 21, 2026

Australian Flag 400

Koning Breast CT System receives Australian TGA approval

September 18, 2026

Image-based grading system estimates nasopharyngeal carcinoma severity

By Amerigo Allegretto

The four-tier grading system showed excellent reliability and good prognostic value for patients with nasopharyngeal carcinoma.

September 23, 2026

Representative MRI scans for which the independently assigned imaging-derived extranodal extension (iENE) grades differed among the readers. (A) Axial and sagittal images in a 56-year-old male patient with nasopharyngeal carcinoma and cervical nodal metastases. Readers 1 and 3 interpreted the finding as a metastatic lymph node invading the left sternocleidomastoid muscle (arrow) and assessed an iENE grade of 3, whereas reader 2 assigned a grade of 2. After joint review, the radiologists reached a consensus on the absence of definite sternocleidomastoid muscle invasion, and the final iENE grade was 2. (B) Axial and sagittal images in a 52-year-old male patient with nasopharyngeal carcinoma and cervical nodal metastases. Reader 1 interpreted the findings as a single enlarged metastatic lymph node and assessed an iENE grade of 1, whereas readers 2 and 3 interpreted them as two coalescent metastatic lymph nodes (arrows) and assessed a grade of 2. After joint review, the radiologists reached a consensus on the coalescence of the two metastatic lymph nodes, and the final iENE grade was 2.

Altis Labs raises $25M for CT AI tool

By AuntMinnie.com staff writers

IPRO is designed to generate survival predictions from routinely acquired CT scans.

September 21, 2026

a2z Radiology secures FDA clearance for CT AI device

By AuntMinnie.com staff writers

The software analyzes abdominopelvic CT images acquired with or without intravenous contrast in adults 22 and older.

September 21, 2026

Koning Breast CT System receives Australian TGA approval

By AuntMinnie.com staff writers

The system can now be sold in Australia, with Brisbane Radiology being the first Australian provider to purchase the system.

September 18, 2026

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AI boosts brain aneurysm detection on CT angiography

AI preferentially detected smaller aneurysms (< 3 mm), while radiologists more often identified larger aneurysms (3 to 5 mm and > 5 mm).

September 17, 2026

CCTA links neighborhood income to atherosclerosis

The relationship between socioeconomic disparities and imaging-defined coronary atherosclerosis on CCTA has not been fully understood.

September 15, 2026

Chest CT muscle attenuation predicts future bone density loss

Muscle and bone loss commonly coexist with aging, but potential links between paraspinal muscle and thoracic vertebral bone mineral density loss remain poorly understood

September 15, 2026

Study overview. (A) Volumetric segmentation of the paraspinal musculature was performed for 1,316 participants. (B) Manual segmentation was performed, the results were compared with the volumetric segmentation results, and the Dice score and the intersection over union were calculated. (C) The three-dimensional segmentations from T1 through T10 were individually extracted and combined into a single volume for analyses. (D) Muscle volume and median muscle attenuation were derived from the segmentation volumes. (E) Analyses were performed to assess the correlation of the paraspinal muscle attenuation and volume with the bone mineral density and the ability to predict vertebral fractures. NIFTI = Neuroimaging Informatics Technology Initiative, 3D = three-dimensional.

CT visualizes leadless pacemaker encapsulation

By Amerigo Allegretto

CT findings could guide risk stratification and treatment strategies for pacemakers.

September 11, 2026

Pacemaker Heart 400 (1)

Elucid nets $55M in funding round

By AuntMinnie.com staff writers

The financing brings Elucid's total funding to approximately $185 million.

September 2, 2026

AI cuts chest CT reporting time

Exploratory modeling suggested an approximate reduction of 0.5 full-time equivalent radiologist workload.

September 1, 2026

Example of AI-assisted pulmonary nodule detection and longitudinal volumetric assessment in a 65-year-old woman with peripheral arterial disease, a 24-pack-year smoking history, emphysema, and a family history of lung cancer. An incidental 8.5-mm right lower lobe pulmonary nodule is identified at CT angiography of the abdomen in July 2022 but does not receive follow-up. Subsequent imaging demonstrates interval growth, and CT-guided biopsy confirms stage IA lung adenocarcinoma. Contrast-enhanced axial chest CT images obtained on February 2, 2024, before robotic-assisted thoracoscopic segmentectomy, show a 12.1-mm spiculated right lower lobe pulmonary nodule. (A) Conventional contrast-enhanced axial chest CT image without AI assistance shows a 12.1-mm spiculated right lower lobe pulmonary nodule. (B) Corresponding CT image with AI-assisted pulmonary nodule detection, automated segmentation, and quantitative nodule assessment identifies a solid pulmonary nodule (nodule #1) measuring 13 × 8 (11) mm, with a volume of 739 mm3, a 45% volumetric increase compared with the previous contrast-enhanced chest CT performed on October 9, 2023 (510 mm3), and an estimated volume doubling time (VDT) of 216 days. (C) AI-generated longitudinal nodule analysis displays automated segmentation of the current (February 2, 2024) and previous (October 9, 2023) CT examinations, 3D nodule reconstruction, and quantitative volumetric assessment for longitudinal follow-up. The AI interface is displayed in the original software language (Dutch).

PCCT on par with MRI for diagnostic breast imaging

By Amerigo Allegretto

PCCT performed similarly to MRI for characterizing breast lesions and finding additional lesions.

September 1, 2026

Detection and extent of BI-RADS suspicious calcifications (amorphous, coarse heterogeneous, fine pleomorphic, and fine linear or fine linear branching) at axial photon-counting CT (PCCT) versus full-field digital mammography (first three images, craniocaudal view; last image, mediolateral oblique view). Calcifications found on mammography showed only partial visualization at ultrahigh-resolution PCCT (0.2 mm), while amorphous calcifications could not be distinguished from image noise. Corresponding abnormal enhancement was clearly depicted on contrast-enhanced PCCT images.

Koning partners with UberDoc marketplace

By AuntMinnie.com staff writers

Koning will display UberDoc physician and service listings within its breast CT platform and introduce provider sites to UberDoc.

September 1, 2026

Ct Scan Patient 400

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