Comparison of radiation dose and image quality for abdominal CT exams using photon-counting and energy-integrating CT: A self-controlled study including optimized patient positioning

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023001%3A_____%2F25%3A00085477" target="_blank" >RIV/00023001:_____/25:00085477 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S1078817425000501?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1078817425000501?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.radi.2025.102909" target="_blank" >10.1016/j.radi.2025.102909</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Comparison of radiation dose and image quality for abdominal CT exams using photon-counting and energy-integrating CT: A self-controlled study including optimized patient positioning

Popis výsledku v původním jazyce

Introduction: Photon-counting detector (PCD) CT represents a major advancement in CT imaging, offering improved image quality and reduced radiation dose compared to traditional energy-integrating detector (EID) CT. This study compared image quality and radiation dose using a self-controlled approach, while evaluating the impact of patient positioning. Methods: This retrospective study analyzed data from 200 patients who underwent abdominal CT scans on both EID (Somatom Definition Flash) and PCD (Naeotom Alpha) scanners. After applying inclusion criteria for proper positioning (within +/- 20 mm) and stable anatomical conditions, 119 patients were included. Radiation doses were assessed using CTDIvol, and image quality was evaluated via CT numbers, noise levels, signal-to-noise ratio (SNR), SNR to dose (SNRD), and contrast-to-noise ratio to dose (CNRD). Results: The study found a median radiation dose reduction of 37 % with PCD CT compared to EID CT (p &lt; 0.05). Image quality assessments revealed significant improvements with PCD CT, including reduced noise levels (up to 31 % in contrast-enhanced organs) and enhanced SNRD (33-51 % increase). CNRD improved by 60-76 %, indicating superior imaging performance of PCD CT. However, 36 % of patients on EID were positioned outside the +/- 20 mm range, which could adversely affect image quality and radiation dose, underscoring the need for more precise patient positioning. Conclusion: This study confirms that PCD CT achieves substantial reductions in radiation dose while enhancing image quality. However, accurate patient positioning is crucial to fully optimize these benefits. Automated tools that ensure proper positioning may be necessary to consistently maintain image quality and reduce radiation exposure. Implications for practice: PCD CT offers improved patient safety and diagnostic imaging. Automated positioning tools are essential to optimize and consistently maintain image quality and minimize radiation exposure. (c) 2025 The College of Radiographers. Published by Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies.

Název v anglickém jazyce

Comparison of radiation dose and image quality for abdominal CT exams using photon-counting and energy-integrating CT: A self-controlled study including optimized patient positioning

Popis výsledku anglicky

Introduction: Photon-counting detector (PCD) CT represents a major advancement in CT imaging, offering improved image quality and reduced radiation dose compared to traditional energy-integrating detector (EID) CT. This study compared image quality and radiation dose using a self-controlled approach, while evaluating the impact of patient positioning. Methods: This retrospective study analyzed data from 200 patients who underwent abdominal CT scans on both EID (Somatom Definition Flash) and PCD (Naeotom Alpha) scanners. After applying inclusion criteria for proper positioning (within +/- 20 mm) and stable anatomical conditions, 119 patients were included. Radiation doses were assessed using CTDIvol, and image quality was evaluated via CT numbers, noise levels, signal-to-noise ratio (SNR), SNR to dose (SNRD), and contrast-to-noise ratio to dose (CNRD). Results: The study found a median radiation dose reduction of 37 % with PCD CT compared to EID CT (p &lt; 0.05). Image quality assessments revealed significant improvements with PCD CT, including reduced noise levels (up to 31 % in contrast-enhanced organs) and enhanced SNRD (33-51 % increase). CNRD improved by 60-76 %, indicating superior imaging performance of PCD CT. However, 36 % of patients on EID were positioned outside the +/- 20 mm range, which could adversely affect image quality and radiation dose, underscoring the need for more precise patient positioning. Conclusion: This study confirms that PCD CT achieves substantial reductions in radiation dose while enhancing image quality. However, accurate patient positioning is crucial to fully optimize these benefits. Automated tools that ensure proper positioning may be necessary to consistently maintain image quality and reduce radiation exposure. Implications for practice: PCD CT offers improved patient safety and diagnostic imaging. Automated positioning tools are essential to optimize and consistently maintain image quality and minimize radiation exposure. (c) 2025 The College of Radiographers. Published by Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

30224 - Radiology, nuclear medicine and medical imaging

Projekt

—

Návaznosti

N - Vyzkumna aktivita podporovana z neverejnych zdroju

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Radiography

ISSN

1078-8174

e-ISSN

1532-2831

Svazek periodika

31

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

"art. no. 102909"

Kód UT WoS článku

001450634500001

EID výsledku v databázi Scopus

2-s2.0-105000068239