What’s New in Photon Counting CT?

May 20, 2026 · 6 articles · 6 research themes · covering May 13, 2026 – May 20, 2026

Overview

Across these studies and reviews, photon-counting detector CT (PCD-CT) emerges as a central theme, with consistent emphasis on improved spatial/contrast performance and the potential to make CT safer through dose and contrast reduction. In intra-patient comparisons, PCD-CT maintained iodine enhancement even when iodinated contrast dose was reduced by 30%, and in acute respiratory distress syndrome (ARDS) it was evaluated for image quality alongside radiation exposure metrics—both pointing toward protocols that could preserve diagnostic confidence while lowering patient burden.

Beyond general cardiothoracic performance, the dataset highlights targeted spinal and vascular applications where PCD-CT’s resolution and spectral capabilities may translate into better localization of clinically critical anatomy. A streamlined entire-spine PCD-CT myelography workflow was developed to improve detection of CSF-venous fistulas in spontaneous intracranial hypotension after inconclusive prior imaging, and PCD-CT angiography was assessed for localization of the artery of Adamkiewicz to support planning and risk mitigation for spinal vascular interventions.

Complementing the imaging-technology advances, a narrative review on myocarditis focuses on multimodality cardiac imaging integration—anchoring diagnosis and risk stratification around cardiac MRI (including updated Lake Louise Criteria and parametric mapping), while incorporating echocardiographic strain for subtle dysfunction and PET for additional phenotyping—aiming to standardize imaging-driven care when biopsy and biomarkers are limited.

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Photon-Counting CT (PCD-CT) vs Energy-Integrating CT (EID-CT): Image Quality & Dose

Photon-counting CT versus energy-integrating CT of the chest in acute respiratory distress syndrome: A retrospective observational study of image quality and radiation exposure.

This retrospective observational study intra-individually compared photon-counting detector CT (PCD-CT) versus energy-integrating detector CT (EID-CT) in acute respiratory distress syndrome (ARDS) patients undergoing contrast-enhanced chest imaging. The study assessed image quality and radiation exposure metrics (including CT dose index volume, CTDIvol) to determine whether PCD-CT improves image quality and enables radiation dose optimization. If confirmed, PCD-CT could support safer CT monitoring strategies in critically ill ARDS patients by improving diagnostic image quality while reducing radiation burden.

Rosok D, Opitz M, Bos D et al. · Emergency radiology · (2026) · View on PubMed ↗ · Free PDF ↗

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Contrast Media Reduction & Iodine Enhancement in PCD-CT

Intra-patient comparison of portal-venous CT attenuation on virtual monoenergetic reconstructions: Spectral EID versus photon-counting detector CT with 30% contrast media dose reduction.

This intra-patient study compared portal-venous chest-abdomen-pelvis CT iodine enhancement between spectral energy-integrating detector (sEID) and photon-counting detector (PCD) CT while reducing iodinated contrast media dose by 30% in 93 patients. PCD and sEID were evaluated at identical virtual monoenergetic (VME) reconstruction levels to determine whether PCD provides superior iodine enhancement despite the contrast reduction. If PCD maintains or improves portal-venous iodine attenuation under lower contrast dosing, it could support safer CT protocols that reduce contrast-associated renal injury risk.

Pedersen SK, Albæk SB, Kusk MW · Radiography (London, England : 1995) · (2026) · View on PubMed ↗ · Free PDF ↗

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PCD-CT Myelography for CSF-Venous Fistula Detection

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

This internal review board-approved study developed and tested a streamlined entire-spine photon-counting CT (PCCT) myelography protocol for detecting CSF-venous fistulas in 35 patients with spontaneous intracranial hypotension and prior inconclusive imaging. The protocol used fluoroscopy-guided contrast injection followed by decubitus transport to PCCT for whole-spine evaluation to improve detection of CSF leaks that are difficult to localize with energy-integrating CT myelography due to spatial resolution limits. A practical, workflow-optimized PCCT myelography approach could improve diagnostic yield and localization of CSF-venous fistulas in busy clinical settings.

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

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PCD-CT Angiography for Spinal Vascular Localization (Artery of Adamkiewicz)

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

This article evaluated the clinical application of photon-counting detector CT (PCD-CT) angiography for localization of the artery of Adamkiewicz, the dominant feeder to the inferior anterior spinal artery. The key premise is that PCD-CT’s high spatial resolution and related technical advantages can improve visualization and localization of this critical spinal arterial supply. Better localization may enhance planning and risk mitigation for spinal vascular interventions and improve diagnostic confidence in suspected spinal vascular pathology.

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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Cardiac Imaging in Myocarditis: Multimodality Integration

Multimodality Imaging in Myocarditis: Integrating Etiology, Diagnosis, and Risk Stratification.

This narrative review synthesized evidence on multimodality cardiac imaging in myocarditis, focusing on integrating etiology, diagnosis, and risk stratification across patient populations. It highlights cardiac MRI as the reference noninvasive modality, emphasizing parametric mapping and updated Lake Louise Criteria for improved diagnostic sensitivity and prognostic stratification, with echocardiographic strain imaging for subclinical dysfunction and positron emission tomography for additional phenotyping. The proposed integration pathway aims to standardize imaging-driven diagnosis and longitudinal risk management when endomyocardial biopsy and biomarkers are limited.

Debs D, Rushworth P, Liu J et al. · Current cardiology reports · (2026) · View on PubMed ↗

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PCD-CT in Cardiothoracic Imaging (Clinical Applications & Evidence Synthesis)

Photon-Counting Detector CT in Cardiothoracic Imaging: AJR Expert Panel Narrative Review.

This AJR Expert Panel narrative review summarized clinical evidence for photon-counting detector CT (PCD-CT) in cardiothoracic imaging compared with energy-integrating detector (EID) CT. It reports that PCD-CT can improve spatial and contrast resolution and provides intrinsic spectral information, with potential benefits including radiation dose reduction and reduced contrast media volume across cardiothoracic applications. These capabilities could translate into more accurate cardiopulmonary assessment with safer imaging protocols.

Milos RI, Siegel MJ, Bluemke DA et al. · AJR. American journal of roentgenology · (2026) · View on PubMed ↗

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Generated automatically on May 20, 2026. Covers PubMed articles published May 13, 2026 – May 20, 2026. Summaries are AI-generated; always consult the original publication for clinical or research decisions.