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Optimized contrast enhancement and homogeneity in aortic CT angiography: bolus tracking with personalized post-trigger delay.
Quant Imaging Med Surg
January 2025
Department of Radiology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.
Background: The bolus tracking technique has been used for decades, yet still faces the challenging task of determining the optimal scanning time for individuals. Our study aimed to assess the feasibility of a novel bolus tracking method with a personalized post-trigger delay (PTD) to optimize scanning time and achieve optimized enhancement and contrast homogeneity in aortic computed tomography angiography (CTA).
Methods: Participants undergoing aortic CTA with bolus tracking were prospectively assigned to two different groups: Group A with a fixed 6-second PTD and Group B with a personalized PTD.
Effect of Lipid Composition and Stirring Dynamics on Oxygen Microbubble Stability and Oxygen Release.
Langmuir
January 2025
Biomedical Engineering Program, University of Colorado Boulder, Boulder, Colorado 80309, United States.
Lipid-coated oxygen microbubbles (OMBs) are being investigated for biomedical applications to alleviate hypoxia such as systemic oxygenation and image-guided radiosensitization therapy. Additionally, they hold potential for boarder application as oxygen carriers beyond the biomedical filed. Understanding the stability and oxygen release properties of OMBs in dynamic aqueous environments is critical for these applications.
View Article and Find Full Text PDFBolus-Tracked Biphasic Contrast-Enhanced CT Imaging Following Microwave Liver Ablation Improves Ablation Zone Conspicuity and Semi-automatic Segmentation Quality.
Cardiovasc Intervent Radiol
January 2025
Interventional Radiology, The Royal Marsden, 203 Fulham Road, London, SW36JJ, UK.
Purpose: Contrast-enhanced CT (CECT) may be performed immediately following microwave liver ablation for assessment of ablative margins. However, practices and protocols vary among institutions. Here, we compare a standardized bolus-tracked biphasic CECT protocol and compare this with a single venous phase fixed delay protocol for ablation zone (AZ) assessment.
View Article and Find Full Text PDFFactors Influencing Contrast Enhancement in Abdominal Computed Tomography Angiography in the Dog: A Systematic Review.
Animals (Basel)
December 2024
Department of Veterinary Medical Sciences, University of Bologna, 40064 Ozzano dell'Emilia, Italy.
Multidetector-row computed tomographic angiography (angio-CT) aims to achieve optimal opacification of the vascular compartment of interest. The distribution and quality of vascular opacification are influenced by patient-related factors, contrast medium (CM)-related factors, and scanner-related factors. This systematic review evaluates these factors and their effects on contrast enhancement.
View Article and Find Full Text PDFAn economic evaluation of sensor-assisted health monitoring in dairy farming using the example of a rumen bolus.
J Dairy Sci
December 2024
SimHerd A/S, Niels Pedersens Alle 2, 8300, Denmark.
The study investigates the economics of sensor-assisted dairy health management and indicates a certain economic potential in the use of a commercial rumen bolus capable of tracking activity and core body temperature. The economic evaluation was performed applying a stochastic model with the net return (NR) of investment of the sensor system as the target variable. The calculated NR considers the gross margin (GM) for both sensor-assisted and visual health monitoring, time savings through sensor-assisted monitoring, additional time spent addressing false positive messages from the sensor system, labor costs, and all costs associated with the investment in the sensor system.
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