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Photon-Counting Cardiac CT in Post-PCI Patients

10. august 2026 oppdatert av: Xin Lou, Chinese PLA General Hospital

Diagnostic Performance and Prognostic Value of Multiparametric Photon-Counting Cardiac CT in Patients With Prior Coronary Stent Implantation: A Prospective Cohort Study

This study takes patients who have undergone percutaneous coronary intervention as the research subjects and employs a prospective observational cohort design, aiming to develop and validate a "one-stop" photon-counting computed tomography imaging framework. The one-stop PCCT protocol implies that multiple assessments are acquired through a single examination, including coronary CT angiography for stent and native artery evaluation, resting first-pass myocardial iodine distribution imaging, and delayed myocardial extracellular volume quantification, with cardiac cine imaging performed in a prespecified dose-controlled substudy.

Studieoversikt

Status

Rekruttering

Forhold

Detaljert beskrivelse

In the long-term management of patients after percutaneous coronary intervention, imaging assessment has become an indispensable tool for detecting in-stent restenosis, progression of native coronary artery disease, myocardial ischemia, and adverse ventricular remodeling. Current guidelines recommend various imaging modalities, including coronary CT angiography for stent and vessel evaluation, stress perfusion imaging for myocardial ischemia, and cardiac magnetic resonance for tissue characterization and ventricular function. However, traditional follow-up strategies require multiple separate examinations, which entail repeated contrast agent administration, cumulative radiation exposure, prolonged diagnostic timelines, and fragmented pathophysiological assessment. How to simultaneously evaluate coronary anatomy, myocardial iodine distribution, extracellular volume, and cardiac function through a single examination is a major clinical need that remains to be addressed.

This study takes patients who have undergone percutaneous coronary intervention as the research subjects and adopts a prospective observational cohort design. The aim is to innovatively develop and validate a "one-stop" photon-counting computed tomography imaging framework. The PCCT ONE-STEP protocol implies that multiple assessments are acquired through a single intravenous contrast injection and a single examination visit, including ultra-high-resolution coronary CT angiography for stent and native artery evaluation, spectral first-pass myocardial iodine distribution imaging, and low-dose delayed myocardial extracellular volume quantification. In a prespecified dose-controlled substudy, cardiac cine imaging and CT-derived strain analysis are additionally obtained.

The PCCT ONE-STEP protocol leverages the intrinsic spectral sensitivity and high spatial resolution of photon-counting detector technology. It can reduce the total volume of iodinated contrast medium and cumulative radiation dose compared with the sum of separate diagnostic examinations, while preserving or expanding the imaging content. By providing integrated coronary, myocardial iodine, extracellular volume, and functional phenotypes at a single visit, it has the potential to shorten the diagnostic work-up, decrease the incidence of contrast-associated adverse events, and improve patient throughput. The acquisition of multiple key imaging indicators enables individualized comprehensive assessment of post-PCI patients, supports the investigation of biological relevance through associations with circulating biomarkers, and facilitates the prediction of clinical ischemic and heart failure-related outcomes. The implementation of this study is expected to optimize the imaging pathway in the long-term care of patients after percutaneous coronary intervention.

Studietype

Observasjonsmessig

Registrering (Antatt)

800

Kontakter og plasseringer

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Studiekontakt

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Studiesteder

    • Beijing Municipality
      • Beijing, Beijing Municipality, Kina, 100039
        • Rekruttering
        • Chinese PLA General Hospital
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Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

  • Voksen
  • Eldre voksen

Tar imot friske frivillige

Nei

Prøvetakingsmetode

Ikke-sannsynlighetsprøve

Studiepopulasjon

Patients with cardiovascular diseases

Beskrivelse

Inclusion Criteria:

  1. Age 18 years or older;
  2. History of percutaneous coronary intervention with implantation of at least one coronary stent;
  3. Ability to undergo iodinated contrast-enhanced CT;
  4. Ability and willingness to provide written informed consent.

Exclusion Criteria:

  1. Estimated glomerular filtration rate below the institutional threshold for contrast-enhanced CT, generally less than 30 mL/min/1.73 m², unless examination is clinically justified and approved according to institutional policy;
  2. Known severe hypersensitivity to iodinated contrast material that cannot be adequately managed using the institutional premedication protocol; Pregnancy or suspected pregnancy;
  3. Inability to provide informed consent or comply with study procedures;
  4. Severe respiratory inability to perform the required breath-hold.

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Integrated Clinical Value of One-Stop Photon-Counting CT Phenotyping in Post-PCI Patients
Tidsramme: 3 years
One-Stop photon-counting computed tomography examination in post-percutaneous coronary intervention patients performance, including coronary stent and native artery assessment, myocardial iodine distribution and extracellular volume quantification, functional strain imaging, diagnostic accuracy for angiographically significant in-stent restenosis (sensitivity, specificity, area under the curve), and prognostic association with major adverse cardiovascular events (cardiovascular death, nonfatal myocardial infarction, hospitalization for acute coronary syndrome, ischemia-driven revascularization,eg) over 12 months.
3 years

Samarbeidspartnere og etterforskere

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Sponsor

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart (Faktiske)

7. januar 2026

Primær fullføring (Antatt)

7. januar 2029

Studiet fullført (Antatt)

7. januar 2029

Datoer for studieregistrering

Først innsendt

10. august 2026

Først innsendt som oppfylte QC-kriteriene

10. august 2026

Først lagt ut (Faktiske)

13. august 2026

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

13. august 2026

Siste oppdatering sendt inn som oppfylte QC-kriteriene

10. august 2026

Sist bekreftet

1. januar 2026

Mer informasjon

Begreper knyttet til denne studien

Ytterligere relevante MeSH-vilkår

Andre studie-ID-numre

  • One-Stop Photon CT in Post-PCI

Plan for individuelle deltakerdata (IPD)

Planlegger du å dele individuelle deltakerdata (IPD)?

NEI

Legemiddel- og utstyrsinformasjon, studiedokumenter

Studerer et amerikansk FDA-regulert medikamentprodukt

Nei

Studerer et amerikansk FDA-regulert enhetsprodukt

Nei

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