Dr. Roderic Pettigrew, PhD

Nov 26, 2017

Emergency Entrance

Low-value x-ray persists in patients with maxillofacial trauma

February 17, 2026

2026 02 17 Quadruple Low Pcct Thumbnail

'Quadruple low' PCCT protocol improves lung cancer imaging

February 17, 2026

New benchmark helps monitor cumulative CT radiation dose

February 13, 2026

2026 02 13 Port Fractures Thumbnail

Study questions routine use of radiotherapy after bone surgery

February 13, 2026

Low-value x-ray persists in patients with maxillofacial trauma

Targeted interventions to reduce low-value imaging may improve diagnostic accuracy.

February 17, 2026

Emergency Entrance

'Quadruple low' PCCT protocol improves lung cancer imaging

By Kate Madden Yee

The findings could translate to better care for patients who require repeated contrast-enhanced imaging.

February 17, 2026

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New benchmark helps monitor cumulative CT radiation dose

By Kate Madden Yee

The findings highlight the need for systematic dose tracking and rigorous justification of imaging.

February 13, 2026

Study questions routine use of radiotherapy after bone surgery

Findings suggest a possible hazard associated with postoperative radiotherapy.

February 13, 2026

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CEUS outshines color Doppler imaging for indeterminate kidney lesions

By Amerigo Allegretto

CEUS outperformed color Doppler ultrasound in a study focusing on indeterminate kidney lesions.

February 13, 2026

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Women's Imaging MinnieCast, Episode 2: Risk-based vs. annual mammography screening, part 1

By Amerigo Allegretto

Vilert Loving, MD, from Ochsner Health and the SBI discusses breast cancer screening based on annual mammography versus risk.

February 13, 2026

Minnie Cast Thumbnail (1) 1

Chest x-rays reveal atherosclerosis in patients undergoing amputations

Lower limb amputation is an increasingly common major complication of advanced peripheral arterial disease and diabetes mellitus.

February 12, 2026

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3D MRI technique helps plan treatment for pediatric heart conditions

By Kate Madden Yee

The method makes "heart muscle and heart valves visible while making blood and surrounding tissues transparent," researchers noted.

February 12, 2026

Cardiac Mri Adobe Samunella

Could AI scoring help with managing DCIS?

By Amerigo Allegretto

An AI model showed associations with recurrence after DCIS surgery and performed comparably to established clinical risk models.

February 11, 2026

Images of a 39-year-old who underwent screening mammography. Right craniocaudal (left) and mediolateral oblique (middle) views from preoperative mammography show suspicious grouped fine pleomorphic calcifications (arrows). After biopsy showed ductal carcinoma of situ (DCIS), patient underwent breast-conserving surgery, yielding final diagnosis of ductal carcinoma in situ (intermediate grade, hormone receptor positive). (Right) Screenshot of an output of a commercial AI tool applied to preoperative mammography. AI detected right breast lesion with score of 95% on both views (concentric colored circles). Present study’s reviewing radiologist deemed AI marking to correspond with site of DCIS.

Clinicians, beware: CT diagnostic accuracy varies by adnexal lesion type

By Kate Madden Yee

The modality correctly diagnoses dermoids and simple cysts, but is not as effective at identifying other types of adnexal lesions.

February 11, 2026

Axial contrast-enhanced CT scan in a 28-year-old premenopausal woman shows an incidentally detected solid-appearing left ovarian lesion (solid arrow) anterior to the uterus (U), associated with trace ascites in the right adnexa and cul de sac (dashed arrows). At pathologic analysis, this was shown to be ovarian dysgerminoma. Two readers misdiagnosed this lesion, one as a leiomyoma and one as an ovarian fibroma.

Radiology coding update for 2026

By Erin Stephens

In a new column, Erin Stephens of Healthcare Administrative Partners reviews the 2026 CPT code changes.

February 11, 2026

Super-resolution deep learning reconstruction improves CCTA

The commercially available image reconstruction algorithm outperformed standard hybrid iterative reconstruction for assessing coronary stenosis.

February 10, 2026

Images from two representative cases. (A-C) Images in an 82-year-old man with a calcified plaque in the proximal segment of the left anterior descending artery. (A, B) Curved planar reconstruction images from CCTA with (A) hybrid iterative reconstruction (HIR) and (B) super-resolution deep learning reconstruction (SR-DLR) show that the measured PDS was 66% for the HIR image and 42% for the SR-DLR image. (C) Quantitative analysis of the invasive coronary angiography (ICA) image (reference standard) revealed a PDS of 34% (arrow). (D-F) Images in a 37-year-old woman with a noncalcified plaque in the middle segment of the left circumflex artery. (D, E) Curved planar reconstruction images from CCTA with (D) HIR and (E) SR-DLR show that the measured PDS was 47% for the HIR image and 80% for the SR-DLR image. (F) Quantitative analysis of the ICA image revealed a PDS of 72% (arrow). Blue, red, and yellow lines in A, B, D, and E represent the proximal reference point, stenosed lesion, and distal reference point, respectively, and the insets show the corresponding cross-sectional images.

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