نتایج جستجو برای: concentration of contrast agent
تعداد نتایج: 21198660 فیلتر نتایج به سال:
Introduction: Dynamic Contrast Enhanced (DCE) MRI and pharmacokinetic modeling have shown promise for imaging tumours based on tissue vascularity [1]. The volume transfer function between the plasma and interstitial space, K, can be determined based on measurements of contrast agent concentration time-courses in these spaces [2]. The results of DCE-MRI are believed to have clinical significance...
august wilson is undoubtedly one of the rare black playwrights whose works have attracted streams of attention and worldwide audience. the present study aims at analyzing fences and piano lesson which are two of the most successful plays in his pittsburgh cycle from the perspective of michel foucault’s theories and ideas. studying these two plays from foucault’s perspective opens new windows in...
OBJECTIVE The objective of this study was to measure the protein-specific response of r1 and r2 relaxivities of commercially available gadolinium-based magnetic resonance imaging contrast agents to variation of plasma-protein concentrations. MATERIALS AND METHODS In this in vitro study, contrast agent (gadofosveset trisodium, gadoxetate disodium, gadobutrol, and gadoterate meglumine) dilution...
INTRODUCTION: Contrast Enhanced CT imaging of articular cartilage (CECT) is predicated on the use of positively or negatively charged contrast agents that function as mobile ionic probes that partition themselves in direct or indirect proportion to the glycosaminoglycan (GAG) content of the cartilage matrix according to Donnan equilibrium. Ex-vivo studies have shown that CECT imaging of cartila...
Ultrasound and photoacoustic imaging are highly complementary modalities since both use ultrasonic detection for operation. Increasingly, photoacoustic and ultrasound have been integrated in terms of hardware instrumentation. To generate a broadly accessible dual-modality contrast agent, we generated microbubbles (a standard ultrasound contrast agent) in a solution of methylene blue (a standard...
Introduction: Electrical Impedance Tomography (EIT) is a real time and minimal invasive imaging modality for detection of lesions in tissues even when their structures show no changes. Early detection of lesion with EIT depends on difference between electrical impedance of targeted tissue and its surroundings. Therefore, finding a contrast agent for EIT that increase this diffe...
Using an MRI T(1) by multiple readout pulses (TOMROP) image set, an adaptive neural network (ANN) was trained to directly estimate the concentration of a contrast agent (CA), gadolinium-bovine serum albumin (Gd-BSA), in tissue. In nine rats implanted with a 9L cerebral tumor, MRI acquisition of TOMROP inversion-recovery data was followed by quantitative autoradiography (QAR) using radioiodinate...
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