Computed Tomography

The purpose of the study is to collect data to evaluate utility of a next generation spectral CT system in a clinical setting.

The goal of this clinical trial is to learn if a new computed tomography (CT) lung perfusion imaging method is as effective as standard of care (SOC) CT imaging. The main question it aims to answer is: * Does the new contrast-free method provide more information about lung perfusion than SOC? Participants will undergo a 30 minute chest CT.

The CCS-plastics is an investigator-initiated, prospective, multicenter study of patients undergoing coronary CT angiography (CCTA) for suspected or known chronic coronary syndromes (CCS) referred to invasive coronary angiography for clinical indication. Patients identified as eligible for the protocol will be asked for written consent to participate in the study. The patients' dossiers will be uploaded and transmitted to the core laboratory for analysis. The routine management of the CCS patients will not be affected and all patients will be managed according to current standards. Invasive coronary angiography and coronary blood samples will be performed following the current standards, guidelines, and indications. During invasive coronary angiography, coronary blood samples will be collected per standard of care and sent to a centralized, specialized core laboratory for MNPs and biomarkers analysis. The central core lab for MNPs analyses will be the University of Campania Luigi Vanvitelli, Naples, Italy. The identification, quantification (concentration, mcg/ml), and typing of plastic particles will be performed in each tube for each patient, using pyrolysis-gas chromatography-mass spectrometry (Py-GC/MS) and laser direct infrared (LDIR) spectroscopy. The CCTA will be centrally analyzed by Centro Cardiologico Monzino to evaluate qualitative and quantitative plaque features. Patients will be followed clinically at 1 and 3 years per standard of care.

1-hour Premedication for Allergy Goal in Emergency: PAGE-1 is a prospective, parallel, two-arm, non-inferiority, randomized controlled trial evaluating the safety of a 1-hour (intervention) versus a 4-hour (standard regimen) intravenous (IV) premedication protocol in adult patients in the Emergency Department (ED) with a documented iodinated contrast allergy and requiring computed tomography (CT) imaging for a high-risk indication.

Coronary CT angiography (CCTA) is increasingly used for ischemic heart disease diagnosis. The rising number of CCTA tests has led to a significant increase in the number of finding unexpected incidental extracardiac diseases.

The purpose of this clinical study is to assess the performance of the Precise Image reconstruction algorithm on interventional CT images acquired from adult patients (\>18 years old). The analysis will focus on the performance of Precise Image for scans in which procedural instruments (e.g., needle, probe, screw) are present. Clinical data generated from this study is intended to support a proposed expansion of the Indications for Use of Precise Image. The study has two objectives: 1. To evaluate the image quality for procedural guidance and procedural confidence of Precise Image compared to the standard-of-care reference (iDose4) for: * Interventional CT images of adult patients (\>18 years old). 2. To demonstrate non-inferiority of Precise Image to iDose4 for the relevant interventional CT images.

The purpose of this clinical study is to evaluate the performance of the Precise Image reconstruction algorithm in pediatric patients (specifically, head and body CT imaging of patients from 18 months up to and including 18 years of age). Clinical data generated from this study is intended to support a proposed expansion of the intended population of Precise Image. The study has two objectives: 1. To evaluate the image quality and diagnostic confidence of Precise Image compared to the standard-of-care reference (iDose4) for: * Head and body CT images of pediatric patients (from 18 months up to and including 18 years of age). 2. To demonstrate non-inferiority of Precise Image to iDose4 for the relevant anatomy and resolution groups.

The purpose of this clinical study is to evaluate the performance of the Precise Image reconstruction algorithm for musculoskeletal CT imaging (shoulder, hip, knee) of adult patients (\>18 years old). Clinical data generated from this study is intended to support a proposed expansion of the Indications for Use of Precise Image. The study has two objectives: 1. To evaluate the image quality and diagnostic confidence of Precise Image compared to the standard-of-care reference (iDose4) for: * Musculoskeletal CT images (shoulder, hip, knee) of adult patients (\>18 years old). 2. To demonstrate non-inferiority of Precise Image to iDose4 for the relevant resolution groups.

The purpose of this clinical study is to evaluate the performance of the P-MAR metal artifact reduction algorithm for CT imaging (with metal present) of adult patients (\>18 years old). The study has two objectives: 1. To evaluate the extent of metal artifacts and diagnostic confidence, and overall image quality (independent of metal artifacts) of P-MAR compared to images without metal correction, and compared to O-MAR, for CT images (with metal present) of adult patients (\>18 years old). 2. To demonstrate non-inferiority of P-MAR compared to images without metal correction for the relevant metal groups.

The purpose of the study is to assess the performance of Precise 3D Surview on CT 5300 and Incisive CT Scanners as compared with manual annotation by experienced CT technologists. * To evaluate the acceptance rate of the Auto 3D Planning Box compared with manual annotation by experienced CT technologists. * To evaluate the acceptance rate of the Auto Suggestion for Locator compared with manual annotation by experienced CT technologists. * To evaluate the acceptance rate of the Auto Planning for Truncated Anatomies (lung and liver) compared with manual annotation by experienced CT technologists. * To evaluate the acceptance rate of Auto Planning and Symmetry Correction for Tilted Head compared with manual annotation by experienced CT technologists.

This retrospective multicenter study investigates the association between the timing of computed tomography (CT) scans and short-term outcomes in adult non-traumatic out-of-hospital cardiac arrest (OHCA) patients who achieved return of spontaneous circulation (ROSC). The study includes cases from January 1, 2016, to August 31, 2024, across six branches of National Taiwan University Hospital. Data collected include demographics, Utstein variables, emergency department (ED) interventions and their timing. Primary outcomes are survival to admission, and 1-day, 3-day, and 7-day survival. Secondary outcomes focus on the timing and sequence of CT imaging and other interventions in relation to short-term prognosis and ED length of stay. The study aims to explore whether earlier CT utilization can improve outcomes in the post-resuscitation phase of care.

The aim of this study is to assess accuracy of Lung ultrasound score for early diagnosis of acute respiratory distress syndrome in patients who expected to be mechanically ventilated more than 24 hour in comparison with computed tomography chest .

The aim of this study is to enhance the predictability of therapeutic success in transcatheter tricuspid valve intervention (TTVI) for patients with severe tricuspid regurgitation (TR). This will be achieved through automated analyses of pre-interventional computed tomography (CT) scans. Severe tricuspid regurgitation is associated with poor patient outcomes. In advanced stages, pharmacological therapy becomes ineffective, and surgical intervention carries a high mortality risk. Given this clinical challenge, catheter-based treatment of the tricuspid valve has become a focal point of research. One well-established treatment strategy is percutaneous tricuspid valve intervention, which aims to reduce regurgitation either through annuloplasty, leaflet-based edge-to-edge repair or valve replacement. This approach has been shown to significantly decrease the severity of regurgitation, leading to a dramatic reduction in symptom burden and a marked improvement in quality of life. However, predicting which patients will benefit most from TTVI and determining the optimal technique for each individual remain largely unresolved challenges. Artificial intelligence (AI)-powered software, such as heart.ai by LARALAB (Munich), enables automated measurement of anatomical structures captured via CT imaging. This technology already allows for rapid and precise assessment of cardiac chambers and the tricuspid annulus throughout the entire cardiac cycle, facilitating a comprehensive three-dimensional evaluation of right heart anatomy. To refine patient selection and optimize procedural strategies for TR treatment, the researcher work a multi-center collaboration to analyze treatment outcomes and patient response to specific therapeutic approaches.

This study aims to investigate the use of Ga-68 Dolacga PET scan technology to assess treatment response and liver function changes in patients of early-stage liver cancer receiving RFA. The main questions it aims to answer are: 1. How to assess treatment response and liver function changes in hepatocellular carcinoma patients undergo RFA via Ga-68 Dolacga PET scan? 2. Compared with computed tomography (CT) scans, how effective is Ga-68 Dolacga PET scan for treatment response assessment? 3. What is the correlation between Ga-68 Dolacga PET scan findings and patient treatment outcomes by tracking liver function and tumor recurrence after RFA? Participants will: 1. Undergo Ga-68 Dolacga PET scans and computed tomography before and one month after RFA treatment, followed by monitoring every three months thereafter. 2. Total liver functional volume and residual liver functional volume are obtained from Ga-68 Dolacga PET scan

The study focuses on regional lung examination, in particular on the differentiation between collapsed and hyperinflated lung areas. The purpose of the study is to elaborate common and discriminative elements between different lung imaging modalities in infants and to generate hypotheses for the bedside use of EIT and LUS in infants.

Transarterial microembolization (TAME) is a novel treatment option for chronic musculoskeletal pain, especially suitable for patients who have not responded to conservative treatment or are unsuitable for surgical procedures. This minimally invasive technique primarily targets abnormal neovascularization for embolization, relying heavily on precise information provided by various imaging techniques to ensure the effectiveness and safety of the treatment. This study aims to explore the application of integrating preoperative magnetic resonance imaging (MRI) evidence of patient pain and intraoperative high-resolution synchronous imaging information from fused computed tomography (CT) and angiography systems. This integration is intended to enhance preoperative planning, intraoperative guidance, and final treatment outcome assessment, focusing on its crucial contribution to treatment success. It is hoped that this approach will provide pain intervention physicians with reliable diagnostic tools and safe treatment methods, thereby improving treatment outcomes for patients with chronic musculoskeletal pain.