What's New in Photon Counting CT? — June 02, 2026
AI-summarised digest of 19 PubMed articles on Photon Counting CT published in the last 7 days.
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What’s New in Photon Counting CT?
June 02, 2026 · 19 articles · 15 research themes · covering May 26, 2026 – June 02, 2026
Overview
Across this week’s set of studies and reviews, photon-counting CT (PCCT) is repeatedly positioned as a next-generation imaging platform that improves diagnostic performance through reduced artifacts, higher spatial resolution, and more reliable quantitative material decomposition. Multiple works compare PCCT (including ultra-high-resolution variants) with conventional energy-integrating CT, showing gains in challenging regions such as metal-laden postoperative anatomy (ACDF), artifact-prone urogenital imaging, and temporal bone imaging under dose reduction. Quantitative and spectral advances—especially iodine mapping and virtual monoenergetic imaging—are also central, enabling noninvasive biomarkers that track tumor biology and tissue composition.
A second dominant theme is cardiovascular imaging, spanning both anatomy and physiology. Ultra-high-resolution PCCT is evaluated for coronary and neurovascular in-stent restenosis detection, aiming to reduce reliance on invasive angiography for follow-up. In coronary CT angiography, studies address not only diagnostic performance and safety in screening-like populations but also patient-reported outcomes, highlighting how emotional response and acceptance may influence real-world adoption. Complementing this, cardiac PCCT-based extracellular volume (ECV) quantification is refined with a single-scan virtual noncontrast approach to improve inter-reader reproducibility—particularly relevant for patients where standard subtraction methods are difficult.
Finally, the digest includes translational and application-focused work beyond cardiology: PCCT-derived iodine metrics are linked to histopathology in head and neck squamous cell carcinoma; segmental hepatic extracellular volume fraction (fECV) is used to predict early liver function decline in chronic liver disease; and a systematic review synthesizes evidence for PCCT in multiple myeloma imaging. Broader methodological contributions—such as CT-based 3D joint space width analysis, advanced CT-like spine imaging with cone-beam CT, and an image-guided needle tracking/thermal ablation sensor—underscore how detector technology and quantitative imaging pipelines are converging to make imaging more precise, reproducible, and clinically actionable.
Photon-Counting CT (PCCT) vs Energy-Integrating CT (EID-CT): Comparative Performance
Photon-counting CT in Anterior Cervical Discectomy and Fusion: Improved Metal Artifact Reduction and Impact on Bone Fusion Assessment.
This retrospective study assessed tin-filtered photon-counting CT (PCD-CT) combined with high-energy virtual monoenergetic imaging (VMI at 120 keV) and iterative metal artifact reduction (iMAR) in patients after anterior cervical discectomy and fusion (ACDF) (2023–2026). The key finding was that the PCD-CT/VMI120+iMAR approach improved metal artifact reduction and image quality and enhanced assessment of intragraft and extragraft bone fusion compared with standard polychromatic and single-technique reconstructions. Clinically, this could improve postoperative evaluation of ACDF fusion in the presence of surgical hardware by reducing metal-related diagnostic uncertainty.
Abel F, Curti M, Marth T et al. · Investigative radiology · (2026) · View on PubMed ↗
Reduced beam hardening in urogenital imaging with photon-counting CT: a retrospective direct comparison with conventional CT.
This retrospective direct comparison evaluated photon-counting CT (PCCT) versus conventional energy-integrating CT (EIDCT) for urogenital imaging of the lower pelvis and perirenal area in 35 patients. The key finding was that PCCT reduced beam-hardening artifacts and improved image quality (subjective and quantitative) relative to EIDCT, supporting better visualization in regions prone to artifact. If generalized, PCCT could enhance diagnostic confidence in urogenital CT where beam hardening currently limits image quality.
Brandt EGS, Müller FC, Nielsen YJ et al. · Acta radiologica (Stockholm, Sweden : 1987) · (2026) · View on PubMed ↗
Comparison of photon-counting CT with energy-integrating CT in temporal bone imaging: an anthropomorphic phantom study.
This anthropomorphic phantom study compared photon-counting CT (PCCT) with energy-integrating CT (EICT) for temporal bone imaging using clinically relevant reduced radiation dose protocols. The key finding was that PCCT maintained or improved image quality and visualization of temporal bone anatomical landmarks compared with EICT under dose reduction conditions. This supports PCCT as a promising approach for temporal bone imaging that may reduce radiation exposure without sacrificing diagnostic detail.
Pellby D, Vestin-Fredriksson M, Rönnblom A et al. · Acta radiologica (Stockholm, Sweden : 1987) · (2026) · View on PubMed ↗
Impact of Ultra-Low-Dose Imaging on Image Quality and Volumetric Accuracy of Different Subtypes of Pulmonary Nodules using Photon-Counting Detector CT: A Phantom Study.
A phantom study used ultra-high-resolution photon-counting detector CT (UHR PCD-CT) with an ultra-low-dose protocol to evaluate detection rate, image quality, and volumetric accuracy across 15 pulmonary nodule models of different sizes and subtypes at five dose levels. The key finding was that ultra-low-dose scanning affected noise and contrast-to-noise metrics and, in turn, influenced nodule detection and the accuracy of diameter and AI-measured volume estimates. This matters for optimizing dose reduction strategies in pulmonary nodule imaging while preserving quantitative performance.
Wang Y, Zhou Y, Lei L et al. · The British journal of radiology · (2026) · View on PubMed ↗
Ultra-High-Resolution PCCT for Neurovascular Stents and In-Stent Restenosis
Ultra-High-Resolution Photon-Counting CT Angiography for Noninvasive Detection of Neurovascular In-Stent Restenosis.
This prospective study evaluated ultra-high-resolution photon-counting detector CT angiography (UHR PCD-CTA) in consecutive patients with prior neurovascular stent implantation (July–November 2025) to detect neurovascular in-stent restenosis (ISR). UHR PCD-CTA was designed to improve ISR detection by reducing blooming artifacts and increasing spatial resolution compared with conventional energy-integrating CTA reconstructions. If confirmed, UHR PCD-CTA could provide a more accurate noninvasive imaging tool for monitoring neurovascular stents and guiding timely intervention for ISR.
Su CQ, Zhou C, Wu PF et al. · Stroke · (2026) · View on PubMed ↗
PCCT for Coronary Artery Disease: Imaging Accuracy, Safety, and Patient Experience
Evaluation of patient-reported outcomes in coronary CT angiography versus invasive coronary angiography.
This study evaluated patient-reported outcomes (PROs) for coronary CT angiography (CCTA) versus invasive coronary angiography (ICA) in 151 patients, including 69 with prior ICA experience, using either dual-source CT or photon-counting CT. The key finding was that emotional responses and acceptance of CCTA could be quantified and compared with ICA using standardized PRO measures. This is significant because patient experience may influence the real-world adoption of CCTA as a noninvasive alternative to ICA.
von der Stück MS, Siepmann R, Corban E et al. · European journal of radiology open · (2026) · View on PubMed ↗ · Free PDF ↗
Initial clinical evaluation of photon-counting detector computed tomography for coronary artery disease in Taiwan.
In a retrospective single-center study in 205 asymptomatic Taiwanese participants undergoing coronary CT angiography (103 with third-generation energy-integrating detector CT [EID-CT] in July 2024 vs 102 with first-generation photon-counting detector CT [PCD-CT] in January 2025), the safety and effectiveness of first-generation PCD-CT for coronary artery disease detection were compared. The study found that PCD-CT was comparable to EID-CT for coronary artery disease detection while leveraging PCCT’s expected improvements in dose efficiency, image resolution, and noise performance. If confirmed in larger prospective cohorts, first-generation PCD-CT could improve coronary CTA image quality and efficiency for screening populations.
Lu YW, Wang KL, Wang YW et al. · Coronary artery disease · (2026) · View on PubMed ↗
Advanced Quantitative CT for Coronary Artery Disease: Integrating Stenosis-, Plaque Quantification, and FFR-CT.
This review summarized advanced quantitative CT approaches for coronary artery disease (CAD), integrating stenosis assessment, plaque quantification, and FFR-CT within cardiac CT angiography (CCTA) workflows. The key finding is that AI-based quantitative CT (AI-QCT) can provide more efficient and reproducible plaque biomarker analysis than conventional stenosis-only evaluation, potentially improving risk stratification for major adverse cardiovascular events (MACE). Scientifically and clinically, combining plaque quantification with functional assessment (FFR-CT) may move CAD imaging beyond purely anatomical stenosis grading toward outcome-relevant characterization.
Mihalcioiu S, Mengesha B, Abitbol C et al. · The British journal of radiology · (2026) · View on PubMed ↗ · Free PDF ↗
PCCT for Coronary In-Stent Restenosis (ISR)
Assessing coronary in-stent restenosis using ultrahigh-resolution photon-counting detector CT: results from a two-center study.
This two-center retrospective study assessed diagnostic accuracy of ultrahigh-resolution photon-counting detector CT (UHR PCD-CT) for coronary in-stent restenosis (ISR) using invasive coronary angiography (ICA) as the reference in consecutive stented patients. The key finding was that UHR PCD-CT reconstructed at 0.2 mm slice thickness (with 0.4 mm serving as an energy-integrating-detector CT-like proxy) enabled evaluation of both non-obstructive (<50%) and obstructive (≥50%) ISR. If validated, UHR PCD-CT could improve noninvasive ISR detection accuracy and reduce reliance on invasive angiography for follow-up.
Szilveszter B, Hagar MT, Kulyassa P et al. · European journal of radiology · (2026) · 1 citations · View on PubMed ↗ · Free PDF ↗
PCCT for Cardiac Tissue Quantification (ECV/Extracellular Volume) and Reproducibility
Virtual Noncontrast Images Derived From Photon-Counting CT Enhance Inter-Reader Reproducibility of Myocardial ECV Measurement in Patients With Cardiac Devices.
In 59 patients undergoing photon-counting CT (PCCT) for left ventricular extracellular volume (ECV) measurement—stratified into control (n=20), atrial fibrillation (AF), and cardiac implant/CIED groups—the study tested whether a single-scan virtual noncontrast (VNC) method improves inter-reader reproducibility compared with the standard two-scan subtraction method. The key finding was that the PCCT-derived VNC approach reduced misregistration-related variability and enhanced inter-reader reproducibility of myocardial ECV measurements in these challenging populations. This is significant because more reproducible ECV quantification can strengthen cardiac risk assessment and longitudinal monitoring when patients cannot reliably undergo standard subtraction CT.
Yamakami Y, Hirasawa K, Hada H et al. · Journal of computer assisted tomography · (2026) · View on PubMed ↗
PCCT Spectral Quantification: Iodine Mapping and Virtual Monoenergetic Imaging
Photon counting computed tomography in head and neck squamous cell carcinoma: iodine concentration and histopathological features.
This study investigated whether normalized iodine concentration (NIC) measured with contrast-enhanced photon-counting CT (PCCT) is associated with histopathological features in 84 patients with primary untreated head and neck squamous cell carcinoma (HNSCC). The key finding was that intratumoral iodine concentration derived from iodine maps (NIC = tumoral IC/aortal IC) correlated with tumor histopathology, including tumor stage/grade and proliferative activity (e.g., Ki-67). Scientifically and clinically, quantitative PCCT iodine metrics may serve as noninvasive biomarkers of tumor biology and aggressiveness in HNSCC.
Surov A, Diallo-Danebrock R, Sonnemann H et al. · Journal of cancer research and clinical oncology · (2026) · View on PubMed ↗ · Free PDF ↗
Comparison of spectral performance of three dual-energy CT scanners equipped with a deep-learning image reconstruction algorithm and one photon counting CT scanner: A phantom study.
A phantom study compared spectral performance of three dual-energy CT (DECT) scanners (rapid kV-switching, ultrafast kV-switching, and dual-layer CT) versus one photon-counting CT (PCCT) scanner for virtual monoenergetic images (VMIs) at 40–70 keV and for iodine maps. The key finding was that the PCCT system demonstrated distinct spectral behavior relative to DECT approaches on low-energy VMIs and iodine mapping under matched abdominal/pelvic parameters and a volume CT dose index of 11 mGy. This matters because spectral accuracy at low keV and iodine quantification influence material decomposition tasks such as lesion characterization and contrast assessment.
Greffier J, Salvat C, Pastor M et al. · Diagnostic and interventional imaging · (2026) · 4 citations · View on PubMed ↗ · Free PDF ↗
PCCT for Oncology Biomarkers and Tumor Biology (Head & Neck, Multiple Myeloma)
Photon-counting detector computed tomography (PCD-CT) in multiple myeloma: a systematic review and trial sequential meta-analysis on image quality and radiation dose.
A systematic review and trial sequential meta-analysis evaluated studies in multiple myeloma (MM) patients comparing photon-counting detector CT (PCD-CT) versus energy-integrating detector CT (EID-CT) for image quality (sharpness) and radiation dose (CTDIvol), including 5 eligible studies (n=170) after searching through October 2025. The key finding was that PCD-CT’s impact on sharpness and dose could be synthesized across the included trials, with evidence quality assessed using ROBINS-I and GRADE. Clinically, this informs whether PCD-CT can improve imaging of MM bone lesions while maintaining or reducing radiation exposure.
Ohannesian VA, Taneja BC, do Amaral E Castro A et al. · Skeletal radiology · (2026) · View on PubMed ↗
PCCT for Liver Disease Prognosis and Quantitative Biomarkers
Segmental fECV measurement using PCD-CT as an early predictor of liver function decline in chronic liver disease.
In 146 patients with chronic liver disease (CLD) undergoing liver photon-counting detector CT (PCD-CT) with 3-minute equilibrium-phase imaging, segmental hepatic extracellular volume fraction (fECV) was measured from iodine densities in Couinaud segments S2–S8 and the aorta to predict early liver function decline using modified albumin-bilirubin (mALBI) grade. The key finding was that segmental fECV derived from PCD-CT had diagnostic accuracy for identifying patients at risk of early liver function deterioration. This suggests PCD-CT–based segmental fECV could serve as an imaging biomarker for prognosis in CLD.
Ohtani T, Shimada M, Takahashi K et al. · Abdominal radiology (New York) · (2026) · View on PubMed ↗ · Free PDF ↗
PCCT for Musculoskeletal Imaging (Fracture/Arthropathy/Bone Marrow) — Review
A review of current applications of photon-counting CT in musculoskeletal imaging.
This review assessed the clinical and technical applications of photon-counting CT (PCCT) in musculoskeletal imaging, focusing on how photon-counting detectors differ from energy-integrating CT detectors. The key finding is that PCCT’s direct-conversion photon-counting approach enables ultra-high spatial resolution, systematic spectral imaging, and electronic noise reduction without increasing radiation exposure. These capabilities may improve detection and characterization of fractures, infections, inflammatory and degenerative arthropathies, and other bone marrow disorders in routine musculoskeletal practice.
Bousson V, Vallot A, Guétat P et al. · Diagnostic and interventional imaging · (2026) · 2 citations · View on PubMed ↗ · Free PDF ↗
CT-Based Quantification of Joint Damage (3D JSW Methods)
Evaluation of the use of segmentation-based and deconvolution-based three-dimensional joint space width analysis of the hand and wrist.
This JBMR Plus study compared segmentation-based versus grayscale deconvolution-based three-dimensional joint space width (JSW) analysis methods for CT-derived assessment of hand and wrist joints. The key finding was that the JSW distribution outputs differed between segmentation-based and deconvolution-based approaches, and the study evaluated how these methods performed relative to each other for quantifying joint space damage. This matters because selecting an appropriate 3D CT JSW technique could improve sensitivity and objectivity for arthritis assessment and monitoring beyond ordinal scoring.
Quintiens J, Waungana TH, Kuczynski MT et al. · JBMR plus · (2026) · View on PubMed ↗ · Free PDF ↗
Advanced/Alternative CT-like Imaging Systems (CBCT) for Spine
Gantry-based cone-beam CT of the thoracolumbar spine: A phantom comparison with Photon-Counting CT and Energy-Integrating CT.
This phantom study evaluated a novel gantry-based cone-beam CT (CBCT) system for thoracolumbar spine imaging and compared it with dose-matched photon-counting CT (PCCT) and energy-integrating CT (EICT). The key finding was that the gantry-based CBCT achieved performance characteristics that could be benchmarked against PCCT and EICT for spinal imaging with complete anatomic coverage. This matters for expanding advanced CT-like imaging options to the spine while maintaining image quality under practical dose constraints.
Bach U, Cester D, Kroschke J et al. · European journal of radiology · (2026) · 1 citations · View on PubMed ↗ · Free PDF ↗
Image-Guided Interventions: Needle Tracking and Thermal Ablation Monitoring
Novel Acousto-Optic Sensor for Needle Tip Tracking and Internal Ultrasound Imaging from the Tip for Biopsy and Thermal Ablation.
A novel 125-µm acousto-optic sensor was embedded in a 24-gauge needle stylet to enable real-time 3D needle tip tracking, internal ultrasound (US)-plane imaging, and thermal ablation monitoring during US-guided biopsy/ablation, evaluated in bench phantoms and ex vivo bovine liver. The sensor provided in-plane needle tip localization relative to the US imaging plane with phantom-validated accuracy and enabled detection of ablation margins and relative temperature estimation in the liver model. This supports a potentially more precise, image-guided workflow for needle placement and ablation safety monitoring under US guidance.
Saccenti L, Li M, Hazen L et al. · Journal of vascular and interventional radiology : JVIR · (2026) · View on PubMed ↗ · Free PDF ↗
Noninvasive Diagnostic Techniques for CSF-Venous Fistula in Spontaneous Intracranial Hypotension
Sacral CSF-venous fistula diagnosed using single-day bilateral decubitus myelography: A rare case and a novel technical modification.
This radiology case report described a rare sacral CSF-venous fistula (right S2) diagnosed using single-day bilateral decubitus myelography with a novel technical modification. The key finding was that the modified decubitus myelography technique enabled detection of the sacral fistula that is typically difficult to identify. Clinically, the report provides a practical procedural template for diagnosing sacral CSF-venous fistulas in patients with spontaneous intracranial hypotension.
Kodet ML, Madhavan AA · Radiology case reports · (2026) · View on PubMed ↗ · Free PDF ↗
Generated automatically on June 02, 2026. Covers PubMed articles published May 26, 2026 – June 02, 2026. Summaries are AI-generated; always consult the original publication for clinical or research decisions.