ISSN (Print): Awaited ISSN (Online): 3048-8001
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Short Communication

Photon Counting Detector CT Imaging: A Theoretical and Clinical Approach to Dose Reduction, Artefact Suppression, and Image Enhancement

SPJP Proceedings | Volume 3, Issue 2 | April 2026
Authors:
Lakshita Joshi
Arshad Alam Khan
Assistant Professor, Dept. of Radio Imaging Technology, School of Allied Health Science, SGT University, Gurugram, India
Ashita Jain
Assistant Professor, Dept. of Radio Imaging Technology, School of Allied Health Science, SGT University, Gurugram, India
Received: Jan 18, 2026 Accepted: Mar 25, 2026 Published: Apr 25, 2026
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Abstract

Photon Counting Detector Computed Tomography (PCD-CT) represents a significant advancement in medical imaging technology, offering substantial improvements over conventional energy-integrating detector (EID) systems. By enabling direct conversion of X-ray photons into electrical signals and measuring their individual energies, PCD-CT enhances spatial resolution, improves contrast-to-noise ratio, reduces electronic noise, and significantly lowers radiation dose. This review provides a detailed theoretical discussion of photon counting detector technology, including its physical principles, spectral imaging capabilities, artefact reduction mechanisms, and clinical applications. The comparative advantages of PCD-CT over conventional CT systems are highlighted, particularly in terms of dose efficiency, material decomposition, and image quality enhancement. Furthermore, technical limitations such as charge sharing, pulse pile-up, and system complexity are critically discussed. The integration of photon counting technology into modern CT imaging marks a paradigm shift toward high-resolution, low-dose, and quantitative diagnostic imaging.

Keywords: Photon counting detector, CT imaging, dose reduction, spectral CT, artefact reduction, energy discrimination, spatial resolution, radiology physics.

Article Information
DOI: 10.62502/spjpp/v3i2art7
Journal: SPJP Proceedings
Abbreviation: SPJP Proceedings
ISSN (Print): Awaited
ISSN (Online): 3048-8001
Volume/Issue: 3(2)
Pages: 40-43
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How to Cite
Vancouver Style:
Joshi L, Khan AA, Jain A. Photon Counting Detector CT Imaging: A Theoretical and Clinical Approach to Dose Reduction, Artefact Suppression, and Image Enhancement. SPJP Proceedings 2026;3(2):40-43. doi: 10.62502/spjpp/v3i2art7
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Article Details

Article Type:
Short Communication

Volume/Issue:
3(2)

Year:
2026

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