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Photon-Counting CT

We are excited to present this special collection focused on the emerging field of photon-counting CT (PCCT), sponsored by Siemens Healthineers. This collection highlights the transformative potential of PCCT, which is poised to redefine the landscape of neuroimaging and head and neck diagnostics. As the technology evolves, it offers unparalleled advancements in image resolution, precision, and clinical applicability—transformations that are set to benefit both diagnostic radiology and patient care in profound ways.

Photon-counting CT is a cutting-edge modality that goes beyond the limitations of traditional energy-integrating detectors. With the ability to count individual photons, this technology offers significant improvements in spatial and contrast resolution, enabling the detailed visualization of fine anatomic structures that were previously challenging to capture. It also promises to provide better tissue differentiation, enhancing our ability to detect subtle abnormalities in both soft tissues and bony structures. Beyond this, its ability to reduce radiation dose without compromising image quality is one of its most compelling advantages, offering a safer imaging alternative—especially for pediatric and sensitive patient populations.

The contributions in this special issue reflect the breadth of this technology’s application, from its use in highly detailed imaging of the temporal bone to its potential for improved neurovascular imaging. As we continue to explore and push the boundaries of photon-counting CT, it is becoming increasingly clear that its role in advancing diagnostic imaging is not limited to structural imaging alone, but extends to dynamic and functional applications as well.

This collection provides a comprehensive overview of the current state of photon-counting CT, showcasing its potential not only to improve diagnostic accuracy but also to pave the way for new clinical possibilities. With its ability to offer clearer, more detailed images at lower doses, photon-counting CT stands at the threshold of a new era in medical imaging. As the technology continues to evolve, we anticipate that it will become a central tool in clinical practice, particularly in neuroimaging, otology, and beyond.

We hope this collection sparks further exploration into the potential of photon-counting CT and serves as an invaluable resource for both clinicians and researchers interested in this groundbreaking advancement. It is an exciting time for medical imaging, and we look forward to the continued development of this transformative technology.

Max Wintermark, MD
Editor-in-Chief, AJNR

In this issue

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