What’s New in Photon Counting CT?

June 10, 2026 · 11 articles · 12 research themes · covering June 03, 2026 – June 10, 2026

Overview

Across this week’s set of studies and reviews, a clear through-line is the expanding role of photon-counting CT (PCCT/PCD-CT) for higher-fidelity imaging—especially where spatial resolution, material discrimination, and quantitative accuracy matter. Multiple works focus on vascular and contrast-enhanced applications (e.g., photon-counting CT angiography for the artery of Adamkiewicz and for patent ductus arteriosus), while others show PCCT’s value for difficult localization tasks such as CSF–venous fistula detection in spontaneous intracranial hypotension. In parallel, quantitative imaging performance is emphasized in lung nodule volumetry under low-dose screening conditions and in orthopedic follow-up, where PCCT was used to monitor bone remodeling and osteolysis risk after wrist arthroplasty.

A second dominant theme is optimization for clinical practicality and patient safety. Evidence synthesis in pediatric populations directly compares PCCT with energy-integrating CT (EID-CT) with attention to dose and objective image quality, while a broader 25-year dose-reduction narrative highlights how modern CT technologies—including photon-counting detectors—improve dose efficiency through electronic noise rejection and energy weighting. Complementing this, a streamlined PCCT myelography workflow demonstrates that advanced imaging can be integrated into busy clinical settings without sacrificing diagnostic yield.

Finally, the digest reflects how CT innovation is not only hardware-driven but also computational and translational. A preclinical virtual PCCT simulation platform for head and neck squamous cell carcinoma enables realistic phantom testing of reconstruction strategies without repeated in vivo scans. Meanwhile, a musculoskeletal CT perspective underscores the broader trajectory of CT beyond static bone assessment—incorporating spectral CT and dose-efficient, high-resolution modalities—providing context for why photon-counting approaches are increasingly attractive across diverse anatomical domains.

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Radiation Dose Reduction & Optimization

CT Radiation Dose Reduction With Preserved Diagnostic Performance: How Far Have We Come Over 25 Years?

This narrative review assessed how CT radiation dose reduction has progressed over 25 years, including major technical milestones and the role of photon-counting detector CT. It summarizes innovations such as added beam filtration, dynamic z-axis collimation, automatic tube current modulation and tube potential selection, advanced iterative reconstruction, and deep learning-based reconstructions, and explains how photon-counting CT can further improve dose efficiency via electronic noise rejection and photon-energy weighting. The significance is that it contextualizes current dose-reduction capabilities and supports informed adoption of newer CT technologies to minimize patient radiation exposure without sacrificing diagnostic performance.

McCollough CH, Yu L · AJR. American journal of roentgenology · (2026) · 2 citations · View on PubMed ↗ · Free PDF ↗

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Photon-Counting CT Angiography & Vascular Mapping

Photon-Counting Detector CTA for Localization of the Artery of Adamkiewicz.

This article evaluated the use of photon-counting detector CT angiography (CTA) to detect and localize the artery of Adamkiewicz, the dominant feeder to the inferior anterior spinal artery, in a neuroradiology imaging context. The key finding is that photon-counting detector CTA can improve visualization/localization of this critical spinal arterial supply by leveraging the technology’s high spatial resolution and related imaging advantages. Clinically, more accurate artery of Adamkiewicz localization may support safer planning and monitoring for spinal vascular and surgical interventions where identifying the dominant blood supply is important.

Madhavan AA, Kranz PG, Kodet ML et al. · AJNR. American journal of neuroradiology · (2026) · 1 citations · View on PubMed ↗ · Free PDF ↗

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Photon-Counting CT in Pediatric Imaging

Radiation dose and objective image quality of photon-counting detector computed tomography in pediatric imaging: a systematic review and meta-analysis.

This systematic review and meta-analysis compared photon-counting detector CT (PCD-CT) with energy-integrating detector CT (EID-CT) in pediatric patients aged 17 years or younger. It focused on radiation dose metrics (including volume CT dose index/CTDI), objective image-quality measures, and iodinated contrast dose across comparative studies. The clinical significance is that it synthesizes evidence to determine whether PCD-CT can reduce dose and/or improve objective image quality in children while maintaining diagnostic performance.

Altintas Mese C, Mese I · Pediatric radiology · (2026) · View on PubMed ↗

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Coronary CT for Atherosclerosis Prevention

The emerging role of coronary computed tomography for prevention of cardiovascular disease in asymptomatic individuals.

This article reviewed how coronary computed tomography (CT)—including coronary artery calcium scoring (CACS) and coronary CT angiography (CCTA)—can be used for prevention of atherosclerotic cardiovascular disease in asymptomatic individuals. It argues that direct, non-invasive visualization of coronary atherosclerosis enables a shift from population-based risk algorithms to personalized, disease-based risk stratification and targeted preventive therapy. Clinically, this supports using CCTA/CACS to identify higher-risk asymptomatic patients who may benefit from more intensive primary prevention beyond traditional risk-factor scoring.

Verpalen VA, Aboyans V, Dweck MR et al. · European journal of preventive cardiology · (2026) · View on PubMed ↗ · Free PDF ↗

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CT Imaging for Musculoskeletal Disorders

Musculoskeletal Computed Tomography Imaging: A 30-Year Perspective.

This 30-year perspective article examined advances in musculoskeletal computed tomography (CT) imaging techniques and their clinical applications over time. It highlights that beyond static bone assessment, newer approaches such as spectral CT (for crystal characterization and marrow edema assessment) and dose-efficient, high-resolution CT modalities (including weight-bearing cone-beam CT and CT arthrography) have expanded diagnostic capabilities. The significance is that ongoing CT technology evolution continues to improve characterization of musculoskeletal pathology while supporting pre- and postoperative evaluation with better spatial resolution and contrast.

Omoumi P, Pastor M, Demehri S et al. · Seminars in musculoskeletal radiology · (2026) · View on PubMed ↗

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Photon-Counting CT for Orthopedic Implant Monitoring

Spectral CT in renal cell carcinoma: the promising role of dual-energy and photon-counting techniques.

This prospective clinical study evaluated osseointegration, bone remodeling, and periprosthetic osteolysis after total wrist arthroplasty using photon-counting detector CT (PCD-CT). Nineteen patients were scanned with PCD-CT the day after surgery and at 6 and 12 months, with cortical thickness/density measurements and zone-based assessment around the implant. The key finding was that osseointegration (bone ingrowth to the implant) increased across most zones over time (with an exception noted for the capitate), supporting PCD-CT’s ability to monitor early post-arthroplasty bone changes. The clinical significance is improved imaging-based follow-up of implant integration and osteolysis risk after wrist arthroplasty.

Kekelidze M, García-Figueiras R, Kolmos M et al. · Abdominal radiology (New York) · (2026) · View on PubMed ↗

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Lung Nodule Quantification & Low-Dose Screening

Improvement of Lung Nodule Volumetric Accuracy with Photon-counting Computed Tomography Over Energy-integrating Computed Tomography in Low-dose Screening: A Phantom Study.

This phantom study compared lung nodule volumetric accuracy and precision between photon-counting detector CT (PCD-CT) and energy-integrating detector CT (EID-CT) under low-dose lung cancer screening protocols. Using an anthropomorphic chest phantom with 12 artificial nodules and varying PCD-CT reconstruction parameters (e.g., slice thickness, matrix size, kernel, iterative reconstruction, and virtual monoenergetic imaging energy), the authors found that PCD-CT improved volumetric accuracy for lung nodules compared with EID-CT. The significance is that PCCT reconstruction optimization could enhance quantitative nodule tracking in low-dose screening while maintaining screening-relevant radiation constraints.

Hop JF, Greuter MJW, van Dijk M et al. · Investigative radiology · (2026) · View on PubMed ↗ · Free PDF ↗

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Preclinical/Computational Imaging & Digital Phantoms

Virtual photon-counting micro-CT platform for simulation of head and neck cancer imaging in mice.

The study developed a virtual photon-counting micro-CT (PCCT) simulation platform for mouse models of head and neck squamous cell carcinoma (HNSCC). By transferring vasculature from an energy-integrating detector micro-CT scan into a whole-body digital phantom and training a denoising diffusion probabilistic model (DDPM) on material-decomposed iodine- and barium-enhanced tumors, the authors synthesized contrast-agent tumor distributions fused with vascular anatomy to create realistic HNSCC phantoms. This provides a scientific tool to test and optimize PCCT imaging and reconstruction strategies for preclinical HNSCC research without repeated in vivo scanning.

Nadkarni R, Clark DP, Allphin AJ et al. · Physics in medicine and biology · (2026) · View on PubMed ↗ · Free PDF ↗

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CT Myelography & Intracranial Hypotension Diagnostics

Successful Streamlined Photon-Counting CT Myelography Protocol for Detection of CSF-Venous Fistulas in Busy Practice Settings.

This internal review board-approved clinical study developed and tested a streamlined photon-counting CT (PCCT) myelography protocol for detecting CSF-venous fistulas in patients with spontaneous intracranial hypotension. In 35 patients with prior inconclusive spine imaging, contrast was injected under fluoroscopic guidance and patients were transported in decubitus positioning for entire-spine PCCT myelographic imaging. The key finding was that the streamlined PCCT myelography workflow enabled successful detection of CSF-venous fistulas in busy practice settings. The clinical significance is improved diagnostic efficiency and spatial-resolution performance for a condition that can be difficult to localize with conventional energy-integrating CT myelography.

Schwartz FR, Huang RY, DeSalvo MN et al. · AJNR. American journal of neuroradiology · (2026) · View on PubMed ↗ · Free PDF ↗

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Case Reports in Cardiovascular Imaging

Photon-counting CT angiography for anatomical assessment of patent ductus arteriosus in a child.

This case report studied photon-counting CT angiography (PCCT angiography) for anatomical assessment of patent ductus arteriosus (PDA) in a 10-year-old girl. PCCT angiography demonstrated a ductus connecting the descending thoracic aorta to the proximal left pulmonary artery, with multiplanar and 3D measurements of ductal diameter, length, and spatial relationships. The significance is that PCCT may complement echocardiography when detailed PDA anatomy is required for non-invasive planning.

Sun M, Ma X, Chen Y et al. · Cardiology in the young · (2026) · View on PubMed ↗

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Generated automatically on June 10, 2026. Covers PubMed articles published June 03, 2026 – June 10, 2026. Summaries are AI-generated; always consult the original publication for clinical or research decisions.