Photon-counting CT in Chest Imaging
Photon-counting CT Post-processing Protocols for Robust Quantifications in Chest CT Scans
Who can join
All ages · All sexes
Full eligibility criteria
Inclusion Criteria: * This study recruit from the Duke-COPDGene Phase 4 study. All participants from this cohort is eligible and they will be included if they consent. Exclusion Criteria: * This study recruit from the Duke-COPDGene Phase 4 study. All participants from this cohort is eligible and they will be included if they consent.
About the study
Purpose and objective: This project aims to evaluate photon-counting computed tomography (PCCT) quantitative accuracy using COPDGene subjects. The goal is to establish acquisition protocols for PCCT scans with proper post-processing (e.g., reconstruction parameters and harmonization techniques) that enable reproducible measurements of emphysema metrics (e.g., Perc15, LAA-950, HU accuracy) and airways (Pi10, WA%) in the lungs.
Study activities and population group: The study will recruit subjects from a current study at Duke (COPDGene Phase 4, Pro00113442). Here are the aims:
* The research team will request consent from participants to acquire PCCT scans at their Phase 4 COPDGene visit. Scans will be performed using a PCCT-specific protocol. * Reconstruct the PCCT images with multiple post-acquisition parameter settings. Apply harmonization techniques that are recently developed by the investigators of this study.
Data analysis:
* Identify the reconstruction and harmonization conditions that enable reproducible measurements of emphysema metrics (perc15, LAA-950, HU accuracy) and airways (Pi10, WA%), when compared to the counterpart EICT scans. * Demonstrate the non-inferiority and potentially improved capabilities of PCCT scans in cross-sectional and longitudinal studies.
Risk/safety issues:
The participants are asked to get an additional CT scan with a PCCT scanner at their COPDGene Phase 4 visit. This additional CT scan will be done using an inspiratory chest protocol with a total of 3 mGy (\~1.5 mSv) radiation dose. This is roughly equivalent of 6 month of background radiation. Women who are pregnant will not have a chest CT scan done until they are confirmed to be not pregnant.
What is being tested
- Photon-counting CT (device)
- Energy-integrating CT (device)
Sponsor: Duke University · Participants: 40 · Started: Nov 14, 2025
Contact the study team
- Wendy Curry · Phone: 919-668-8281
Official record on ClinicalTrials.gov — NCT07031336
Locations in the U.S.
| North Carolina | Duke University Hospital, Durham |
Conditions
From ClinicalTrials.gov, data retrieved Sep 30, 2026. Each study sets its own eligibility; the study team decides who can join.