PhD Scientific Days 2026

Poster Session 3.R - Cardiovascular Medicine and Research

Comparative Evaluation of Dual-Source and Single-Source PCD-CT in Coronary CT Angiography

Előadó neve

Dr. Sebestyén-Dósa, Réka

Neptune code

WGIKY9

Előadó munkahelye

Medical Imaging Centre, Semmelweis University

Előadó telefonszáma

06308782875

Előadó e-mail címe

s.reka2000@gmail.com

Az előadás címe

Comparative Evaluation of Dual-Source and Single-Source PCD-CT in Coronary CT Angiography

Szerző(k) neve és munkahelye

Réka Sebestyén-Dósa¹, Lili Száraz¹, Sámuel Beke¹, Kristóf Nagy¹, István Csulak¹, Barnabás Baksa¹, Emese Zsarnóczay¹, Bálint Szilveszter², Béla Merkely², Pál Maurovich-Horvat¹

1: Medical Imaging Centre, Semmelweis University
2: Heart and Vascular Centre, Semmelweis University

Bemutatás módja

Poszter

Szekció

Poster Session 3.R - Cardiovascular Medicine and Research

Language of the presentation

English

Preferred session

Cardiovascular Medicine and Research

Összefoglaló szövege

Introduction
Compared with dual-source (DuS) systems, single-source (SiS) photon-counting detector CT (PCD-CT) may differ in temporal resolution and image noise characteristics.
Aims
We aimed to assess the impact of DuS versus SiS PCD-CT on objective and subjective image quality (IQ) in coronary CT angiography (CTA) performed using standard-resolution scan modes.
Method
We retrospectively analyzed 54 DuS and 54 SiS coronary CTA examinations matched for sex, age, heart rate, body mass index, coronary dominance, and acquisition settings. Objective IQ parameters, including image noise (IN), signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR) and vessel sharpness, were measured by a single reader. Subjective IQ and motion artifacts were evaluated by one reader on a per-patient, per-vessel, and per-segment basis using a 4-point Likert scale.
Results
A total of 108 patients and 1,395 coronary segments were included. Anthropometric characteristics and cardiovascular risk factors were similar between groups. The DuS group had significantly higher dose-length product (267.03 ± 156.50 vs 146.26 ± 59.63 mGy·cm, p < 0.005) and effective dose (4.46 ± 2.58 vs 2.53 ± 0.89 mSv, p < 0.005). No significant differences were observed for objective IQ parameters, including IN (32.8 ± 6.2 vs 31.6 ± 9.8), SNR (22.1 ± 4.2 vs 23.8 ± 4.5), CNR (24.9 ± 4.3 vs 27.1 ± 5.3), and vessel sharpness (489.7 ± 76.4 vs 490.1 ± 77.3; all p > 0.005). In contrast, DuS PCD-CT showed significantly better subjective IQ on a per-patient basis (3.69 ± 0.22 vs 3.35 ± 0.35, p < 0.005), across all major coronary vessels (LM-LAD: 3.67 ± 0.24 vs 3.43 ± 0.36; RCA: 3.70 ± 0.27 vs 3.27 ± 0.32; LCx: 3.60 ± 0.50 vs 3.22 ± 0.58; all p < 0.005), and in distal segments (3.62 ± 0.24 vs 3.21 ± 0.40, p < 0.005). Per-patient interpretability was higher with DuS PCD-CT (96.3% vs 85.2%, p < 0.005).
Conclusion
Although DuS PCD-CT did not significantly improve objective image quality metrics, it provided superior subjective image quality and higher interpretability. These findings suggest that DuS systems may improve diagnostic confidence, potentially due to reduced sensitivity to cardiac micro-motion, albeit at the cost of higher radiation exposure.
Funding
Supported by the Ministry of Culture and Innovation of Hungary through the National Research, Development and Innovation Fund under the KDP-2023 funding scheme.

University

Semmelweis University

Supervisor

Pál Maurovich-Horvat

Publication of my abstract

I do not give consent to the publication of my abstract on the website of the congress.

phd.section.field

in doctoral studies before complex exam (PhD)

Kind

Szabad

Status

elfogadva

Accepted presentation method

poszter

Előadás fájl jóváhagyás

nem rendelkezett róla

Előadó

9724

Start

13:36

End

13:39