Publications by authors named "Ahmad Mayat"
Purpose: The aim of this study was to compare hepatic vascular and parenchymal image quality between direct and peristaltic contrast injectors during hepatic computed tomography (HCT).
Methods: Patients (n = 171) who underwent enhanced HCT and had both contrast media protocols and injector systems were included; group A: direct-drive injector with fixed 100 mL contrast volume (CV), and group B: peristaltic injector with weight-based CV. Opacification, contrast-to-noise ratio, signal-to-noise ratio, radiation dose, and CV for liver parenchyma and vessels in both groups were compared by paired t test and Pearson correlation.
Article Synopsis
- Coronary anomalies affect roughly 1% of the population and can sometimes result in sudden cardiac death.
- Advanced imaging techniques like coronary computed tomography angiography and magnetic resonance imaging effectively identify these anomalies without invasive procedures.
- The article aims to provide a detailed classification system for recognizing different types of coronary artery anomalies.
Clinical Relevance: Matching contrast injection timing with vessel dynamics significantly improves vessel opacification and reduces contrast dose in the assessment of pulmonary embolism during computed tomography (CT) pulmonary angiography.
Purpose: The aim of this study was to investigate opacification of the pulmonary vasculature (PV) during CT pulmonary angiography using a patient-specific contrast formula (PSCF) and exponentially decelerated contrast media (EDCM) injection rate.
Materials And Methods: Institutional review board approved this retrospective study.
Article Synopsis
- The study aimed to compare two CT scan protocols for visualizing head and neck blood vessels during imaging of supraclavicular lymph nodes, focusing on how effectively they enhance vascular opacification.
- Involving 180 patients, the research tested protocol A (a single-bolus injection) against protocol B (a quadruple-phase dual-injection of contrast and saline), measuring the clarity of arteries and veins.
- Results showed protocol B significantly improved arterial visibility by 20%, reduced venous visibility by 75%, and provided better overall image quality (higher contrast ratios) while also reducing the effective radiation dose for patients.