Dr. Roderic Pettigrew, PhD

Nov 26, 2017

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CT 5-star quality rating system supports optimization

August 7, 2026

Nominations Are Open — 2026 Minnies

Nominations Are Open — 2026 Minnies

August 6, 2026

Bone scan testing has fallen 35% among Medicare beneficiaries

August 7, 2026

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MRI-based models may predict atypical brain development in children

August 7, 2026

CT 5-star quality rating system supports optimization

The rating framework demonstrated robust reproducibility, with three-reader concordance reaching up to 93% in highly standardized centers.

August 7, 2026

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READ-DVT model performs well in finding DVT from ultrasound reports

By Amerigo Allegretto

The AI model accurately identified the presence or absence of deep vein thrombosis on unstructured ultrasound reports.

August 7, 2026

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Bone scan testing has fallen 35% among Medicare beneficiaries

Declines in testing were greatest among certain underserved groups.

August 7, 2026

MRI-based models may predict atypical brain development in children

By Amerigo Allegretto

The models could provide a framework for identifying which adolescents are at higher risk of developing psychiatric conditions.

August 7, 2026

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Ultrasound MinnieCast, Episode 14: Weathering the sonographer shortage

By Amerigo Allegretto

SDMS President Aubrey Rybyinski discusses how clinics can address sonographer vacancies.

August 7, 2026

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Avoiding the ED cuts urgent CT turnaround time by half

This is the first reported pilot of an expedited outpatient direct-to-CT imaging program designed to promote ED avoidance.

August 6, 2026

VLMs miss most lung nodules on chest x-rays

Findings indicate poor performance of six VLMs for lung nodule detection on chest x-rays.

August 6, 2026

Patient-friendly radiology reports improve family comprehension

Terminology in radiology reports can be difficult for patients and families to comprehend.

August 5, 2026

Pediatric Imaging

Early CTA leads to improved stroke outcomes for patients with BCVI

By Amerigo Allegretto

Early CTA is linked to reduced stroke, decreased complications, and reduced intensive care unit length of stay.

August 5, 2026

Most histotripsy procedures used for metastatic disease treatment

By Amerigo Allegretto

Trends suggest that histotripsy has low rates of procedure-related complications and is mostly performed in outpatient settings.

August 5, 2026

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Imaging turnaround times continued to climb in 2024

By Erik L. Ridley

The largest increases were found in ultrasound and x-ray.

August 4, 2026

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DBT-based foundational model classifies breast density

By Amerigo Allegretto

DBT-DINO showed strong performance in classifying breast density from DBT images.

August 4, 2026

(A) Free-response receiver operating characteristic (FROC) curve for DBT-DINO and DINOv2 (Meta AI) on the detection task. DINOv2 achieved higher sensitivity than DBT-DINO across most false-positive thresholds. (B) Detection rates of DBT-DINO and DINOv2 for lesions that were ultimately found to be benign (n = 70) and lesions that were found to be cancerous (n = 66). Error bars represent 95% CIs estimated via patient-level bootstrapping with 1000 repetitions. Both models showed similar detection rates for cancerous lesions, whereas DINOv2 detected more benign lesions than DBT-DINO. (C) Example bounding box predictions for DBT-DINO and DINOv2 on the detection test set. Each image is a single two-dimensional section from a three-dimensional digital breast tomosynthesis volume; the first column shows a mediolateral oblique view, and the second and third columns show craniocaudal views. Both models struggled to detect very small lesions, such as the 3-mm-diameter lesion shown in the first column. FP = false positive.

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