André Euler
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View article: Systematic review and comparison of measurement methods for determining the cardiothoracic ratio (CTR) on chest X-rays with subsequent validation using chest CT
Systematic review and comparison of measurement methods for determining the cardiothoracic ratio (CTR) on chest X-rays with subsequent validation using chest CT Open
Background: The cardiothoracic ratio (CTR) is a widely used measurement on chest x-rays (CXR), yet its accuracy and consistency remain limited due to the lack of a standardized measurement method. This study aims to systematically identify…
View article: Artificial Intelligence Language Models to Translate Professional Radiology Mammography Reports Into Plain Language – Impact on Interpretability and Perception by Patients
Artificial Intelligence Language Models to Translate Professional Radiology Mammography Reports Into Plain Language – Impact on Interpretability and Perception by Patients Open
Patient preference differed among AI-translated radiology reports. Compared to a traditional report using radiological language, AI-translated reports add value for patients, enhance comprehensibility and empathy and therefore hold the pot…
View article: Improved Beam-hardening Reduction in CT - Impact on Image Quality and Diagnostic Certainty in Emergency Imaging of the Brain
Improved Beam-hardening Reduction in CT - Impact on Image Quality and Diagnostic Certainty in Emergency Imaging of the Brain Open
An optimized iBHC algorithm demonstrated significantly improved image quality, reduced artifacts and improved diagnostic certainty in emergency unenhanced brain CT.
View article: Fixed Versus Patient-Specific Trigger Delay in High-Pitch Computed Tomography Angiography of the Aorta Prior to Transcatheter Aortic Valve Implantation
Fixed Versus Patient-Specific Trigger Delay in High-Pitch Computed Tomography Angiography of the Aorta Prior to Transcatheter Aortic Valve Implantation Open
Objective: The aim of the study is to compare the image quality and homogeneity of vessel enhancement in high-pitch CT-angiography of the aorta (CTA) prior to transcatheter aortic valve implantation between bolus tracking with a fixed trig…
View article: Assessment of inter- and intrareader agreement among different stenosis quantification methods in coronary CT angiography
Assessment of inter- and intrareader agreement among different stenosis quantification methods in coronary CT angiography Open
Inter- and intrareader agreement for stenosis quantification in coronary CT angiography was overall moderate and did not differ significantly among visual and objective measurement methods. A trend towards lower agreement was observed for …
View article: Chronic fatigue and headache in post-COVID-19 syndrome: a radiological and clinical evaluation
Chronic fatigue and headache in post-COVID-19 syndrome: a radiological and clinical evaluation Open
Introduction The coronavirus disease 2019 (COVID-19) pandemic has caused millions of infections and deaths globally. Post-COVID-19 syndrome, or long COVID is characterized by lingering symptoms such as chronic fatigue, headaches, and sleep…
View article: Phantom evaluation of feasibility and applicability of artificial intelligence based pulmonary nodule detection in chest radiographs
Phantom evaluation of feasibility and applicability of artificial intelligence based pulmonary nodule detection in chest radiographs Open
The aim of our study was to evaluate the specific performance of an artificial intelligence (AI) algorithm for lung nodule detection in chest radiography for a larger number of nodules of different sizes and densities using a standardized …
View article: Dual-Split CT to Simulate Multiple Radiation Doses From a Single Scan—Liver Lesion Detection Compared With Dose-Matched Single-Energy CT
Dual-Split CT to Simulate Multiple Radiation Doses From a Single Scan—Liver Lesion Detection Compared With Dose-Matched Single-Energy CT Open
Objectives The aim of this study was to evaluate the potential use of simulated radiation doses from a dual-split CT scan for dose optimization by comparing their lesion detectability to dose-matched single-energy CT acquisitions at differ…
View article: In vitro blood sample assessment: investigating correlation of laboratory hemoglobin and spectral properties of dual-energy CT measurements (ρ/Z)
In vitro blood sample assessment: investigating correlation of laboratory hemoglobin and spectral properties of dual-energy CT measurements (ρ/Z) Open
Objectives Our study comprised a single-center retrospective in vitro correlation between spectral properties, namely ρ/ Z values, derived from scanning blood samples using dual-energy computed tomography (DECT) with the corresponding labo…
View article: Multi-Energy Low–Kiloelectron Volt versus Single-Energy Low-Kilovolt Images for Endoleak Detection at CT Angiography of the Aorta
Multi-Energy Low–Kiloelectron Volt versus Single-Energy Low-Kilovolt Images for Endoleak Detection at CT Angiography of the Aorta Open
Purpose To compare image quality, diagnostic performance, and conspicuity between single-energy and multi-energy images for endoleak detection at CT angiography (CTA) after endovascular aortic repair (EVAR). Materials and Methods In this s…
View article: Photon-Counting Detector CT for Liver Lesion Detection—Optimal Virtual Monoenergetic Energy for Different Simulated Patient Sizes and Radiation Doses
Photon-Counting Detector CT for Liver Lesion Detection—Optimal Virtual Monoenergetic Energy for Different Simulated Patient Sizes and Radiation Doses Open
Objectives The aim of this study was to evaluate the optimal energy level of virtual monoenergetic images (VMIs) from photon-counting detector computed tomography (CT) for the detection of liver lesions as a function of phantom size and ra…
View article: Impact of radiation dose on the detection of interstitial lung changes and image quality in low-dose chest CT – Assessment in multiple dose levels from a single patient scan
Impact of radiation dose on the detection of interstitial lung changes and image quality in low-dose chest CT – Assessment in multiple dose levels from a single patient scan Open
Radiation dose reduction had a stronger impact on subtle interstitial lung changes. Detectability decreased with initial dose reduction indicating that a minimum dose is needed to maintain diagnostic accuracy in chest CT for suspected ILD.
View article: Photon-Counting Detector CT Angiography for Endoleak Detection After Endovascular Aortic Repair
Photon-Counting Detector CT Angiography for Endoleak Detection After Endovascular Aortic Repair Open
Objectives The aim of this study was to compare image quality and endoleak detection after endovascular abdominal aortic aneurysm repair between a triphasic computed tomography (CT) with true noncontrast (TNC) and a biphasic CT with virtua…
View article: Cardiac Virtual Noncontrast Images for Calcium Quantification with Photon-counting Detector CT
Cardiac Virtual Noncontrast Images for Calcium Quantification with Photon-counting Detector CT Open
VNC images from cardiac photon-counting detector CT enables patient risk stratification and accurate quantification of AVC, MAC, and CAC.Keywords: Coronary Arteries, Aortic Valve, Mitral Valve, Aortic Stenosis, Calcifications, Photon-count…
View article: CT Angiography of the Aorta Using Photon-counting Detector CT with Reduced Contrast Media Volume
CT Angiography of the Aorta Using Photon-counting Detector CT with Reduced Contrast Media Volume Open
CTA of the aorta with PCD CT was associated with higher CNR, which was translated into a low-volume contrast media protocol demonstrating noninferior image quality compared with EID CT at the same radiation dose.Keywords: CT Angiography, C…
View article: Photon-counting detector coronary CT angiography: impact of virtual monoenergetic imaging and iterative reconstruction on image quality
Photon-counting detector coronary CT angiography: impact of virtual monoenergetic imaging and iterative reconstruction on image quality Open
Objectives: To assess the impact of low kilo-electronvolt (keV) virtual monoenergetic image (VMI) energies and iterative reconstruction on image quality of clinical photon-counting detector coronary CT angiography (CCTA). Methods: CCTA wit…
View article: Assessment of Image Quality in Chest CT With Precision Matrix and Increased Framing Rate Using Single Source CT: A Phantom Study
Assessment of Image Quality in Chest CT With Precision Matrix and Increased Framing Rate Using Single Source CT: A Phantom Study Open
Higher framing frequency and image matrix allows for improved image noise texture and objective image quality in CT.
View article: Evaluation of Image Quality of Overweight and Obese Patients in CT Using High Data Rate Detectors
Evaluation of Image Quality of Overweight and Obese Patients in CT Using High Data Rate Detectors Open
A significant increase in objective image quality could be demonstrated using a new generation detector setup with increased frequency transfer in abdominal CT of overweight patients.
View article: Impact of photon counting detector CT derived virtual monoenergetic images and iodine maps on the diagnosis of pleural empyema
Impact of photon counting detector CT derived virtual monoenergetic images and iodine maps on the diagnosis of pleural empyema Open
Low VMI energies lead to a higher diagnostic accuracy and diagnostic confidence in the diagnosis of pleural empyema. Iodine maps help in diagnosing empyema only at high VMI energies.
View article: First in-human quantitative plaque characterization with ultra-high resolution coronary photon-counting CT angiography
First in-human quantitative plaque characterization with ultra-high resolution coronary photon-counting CT angiography Open
Purpose To assess the effect of ultra-high-resolution coronary CT angiography (CCTA) with photon-counting detector (PCD) CT on quantitative coronary plaque characterization. Materials and methods In this IRB-approved study, 22 plaques of 2…
View article: Virtual Noncontrast Abdominal Imaging with Photon-counting Detector CT
Virtual Noncontrast Abdominal Imaging with Photon-counting Detector CT Open
Background Accurate CT attenuation and diagnostic quality of virtual noncontrast (VNC) images acquired with photon-counting detector (PCD) CT are needed to replace true noncontrast (TNC) scans. Purpose To assess the attenuation errors and …
View article: Ultra-High-Resolution Coronary CT Angiography With Photon-Counting Detector CT
Ultra-High-Resolution Coronary CT Angiography With Photon-Counting Detector CT Open
Objectives The aim of this study was to evaluate the feasibility and quality of ultra-high-resolution coronary computed tomography angiography (CCTA) with dual-source photon-counting detector CT (PCD-CT) in patients with a high coronary ca…
View article: Potential of Photon-Counting Detector CT for Radiation Dose Reduction for the Assessment of Interstitial Lung Disease in Patients With Systemic Sclerosis
Potential of Photon-Counting Detector CT for Radiation Dose Reduction for the Assessment of Interstitial Lung Disease in Patients With Systemic Sclerosis Open
Objective The aim of this study was to determine the potential of photon-counting detector computed tomography (PCD-CT) for radiation dose reduction compared with conventional energy-integrated detector CT (EID-CT) in the assessment of int…
View article: Performance of virtual non-contrast images generated on clinical photon-counting detector CT for emphysema quantification: proof of concept
Performance of virtual non-contrast images generated on clinical photon-counting detector CT for emphysema quantification: proof of concept Open
Objective: To evaluate the performance of virtual non-contrast images (VNC) compared to true non-contrast (TNC) images in photon-counting detector computed tomography (PCD-CT) for the evaluation of lung parenchyma and emphysema quantificat…
View article: Diagnosis of acute heart failure in CT pulmonary angiography: feasibility and accuracy
Diagnosis of acute heart failure in CT pulmonary angiography: feasibility and accuracy Open
Objectives To evaluate the feasibility and accuracy of diagnosing acute heart failure (HF) with CT pulmonary angiography (CTPA) in emergency department patients. Methods In this retrospective single-center study, we evaluated 150 emergency…
View article: Quantum Iterative Reconstruction for Low-Dose Ultra-High-Resolution Photon-Counting Detector CT of the Lung
Quantum Iterative Reconstruction for Low-Dose Ultra-High-Resolution Photon-Counting Detector CT of the Lung Open
The aim of this study was to characterize image quality and to determine the optimal strength levels of a novel iterative reconstruction algorithm (quantum iterative reconstruction, QIR) for low-dose, ultra-high-resolution (UHR) photon-cou…