Myocardial Perfusion Quantification With SPECT Using Multi-Pinhole Collimator Compared to Photon-Counting Coronary CTA
Myocardial Perfusion Quantification With Single Photon Emission Computed Tomography Using Multi-Pinhole Collimator Compared to Photon-Counting Coronary Computed Tomography Angiography
Semmelweis University
50 participants
Mar 6, 2024
INTERVENTIONAL
Conditions
Summary
This prospective study aims to compare functional abnormalities detected using myocardial perfusion SPECT imaging (MPI SPECT) with the extent and severity of anatomical findings on coronary computed tomography angiography (coronary CTA). Additionally, the investigators aim to enhance the diagnostic value of MPI SPECT by quantifying myocardial blood flow and utilizing myocardial flow reserve calculated from dynamic SPECT images. 50 patients with suspected coronary artery disease are anticipated to be enrolled. Pharmacological stress and rest-phase dynamic and static MPI SPECT following an additional coronary CTA scan are to be performed. The obtained multimodality imaging data (functional and anatomical parameters) are planned to be compared and subjected to statistical analysis. The results of this study are expected to improve risk assessment for patients with moderate cardiovascular risk and enhance the diagnostic performance of MPI SPECT.
Eligibility
Inclusion Criteria4
- suspected coronary artery disease
- referred to coronary CTA or SPECT MPI by the patient's physician
- agrees to the other imaging modality that was not indicated by their physician (coronary CTA or SPECT MPI)
- suitable for informed consent
Exclusion Criteria9
- moderate or severe aortic valve stenosis
- atrial fibrillation
- pregnancy or breastfeeding
- history of coronary artery bypass graft implantation
- history of stent implantation
- chronic renal failure (eGFR \< 30 ml/m2)
- active oncological treatment
- congenital heart disease
- left or right bundle branch block
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Interventions
BMI standardized radiopharmaceutical injection in pharmacological stress (dipyridamole or adenosine) is performed under the SPECT camera to record the temporal distribution of the activity. A one-day protocol and multi-pinhole collimator are used.
30-60 minutes after stress dynamic SPECT imaging is performed, an ECG-gated static SPECT MPI is conducted with a conventional LEHR collimator.
3 hours after the stress phase, the rest phase is also recorded. A radiopharmaceutical injection with a three-fold dose at rest is performed under the SPECT camera to record the temporal distribution of the activity. A one-day protocol and multi-pinhole collimator are used.
30-60 minutes after rest, dynamic SPECT imaging is performed, and an ECG-gated static SPECT MPI is conducted with a conventional LEHR collimator.
Within 30 days of MPI SPECT imaging, a cardiac CT is performed for every patient, including a native calcium-scoring scan and a coronary CT angiography as a reference standard. A photon-counting detector CT is used.
Locations(1)
View Full Details on ClinicalTrials.gov
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NCT06670768