Synthesis of Biocompatible, Mesoporous Fe3O4 Nano/Microspheres with Large Surface Area for Magnetic Resonance Imaging and Therapeutic Applications

2011 ◽  
Vol 3 (2) ◽  
pp. 237-244 ◽  
Author(s):  
Shouhu Xuan ◽  
Feng Wang ◽  
Josie M. Y. Lai ◽  
Kathy W. Y. Sham ◽  
Yi-Xiang J. Wang ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Surface Area ◽  
Large Surface Area ◽  
Resonance Imaging ◽  
Therapeutic Applications

Regional measurements of pulmonary edema by using magnetic resonance imaging

1998 ◽  
Vol 84 (6) ◽  
pp. 2143-2153 ◽  
Author(s):  
S. D. Caruthers ◽  
C. B. Paschal ◽  
N. A. Pou ◽  
R. J. Roselli ◽  
T. R. Harris
Keyword(s):  
Magnetic Resonance Imaging ◽  
Oleic Acid ◽  
Magnetic Resonance ◽  
Pulmonary Edema ◽  
Surface Area ◽  
Extravascular Lung Water ◽  
Three Dimensional ◽  
Indicator Dilution ◽  
Resonance Imaging ◽  
Lung Water

A three-dimensional magnetic resonance imaging (MRI) method to measure pulmonary edema and lung microvascular barrier permeability was developed and compared with conventional methods in nine mongrel dogs. MRIs were obtained covering the entire lungs. Injury was induced by injection of oleic acid (0.021–0.048 ml/kg) into a jugular catheter. Imaging followed for 0.75–2 h. Extravascular lung water and permeability-related parameters were measured from multiple-indicator dilution curves. Edema was measured as magnetic resonance signal-to-noise ratio (SNR). Postinjury wet-to-dry lung weight ratio was 5.30 ± 0.38 ( n = 9). Extravascular lung water increased from 2.03 ± 1.11 to 3.00 ± 1.45 ml/g ( n = 9, P < 0.01). Indicator dilution studies yielded parameters characterizing capillary exchange of urea and butanediol: the product of the square root of equivalent diffusivity of escape from the capillary and capillary surface area ( D 1/2 S) and the capillary permeability-surface area product ( PS). The ratio of D 1/2 Sfor urea to D 1/2 Sfor butanediol increased from 0.583 ± 0.027 to 0.852 ± 0.154 ( n = 9, P < 0.05). Whole lung SNR at baseline, before injury, correlated with D 1/2 Sand PS ratios (both P < 0.02). By using rate of SNR change, the mismatch of transcapillary filtration flow and lymph clearance was estimated to be 0.2–1.8 ml/min. The filtration coefficient was estimated from these values. Results indicate that pulmonary edema formation during oleic acid injury can be imaged regionally and quantified globally, and the results suggest possible regional quantification by using three-dimensional MRI.

scholarly journals Arthrography of the temporomandibular joint: main diagnostic and therapeutic applications

2019 ◽  
Vol 4 (1) ◽  
Author(s):  
Eva Levring Jäghagen ◽  
Jan Ahlqvist
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Soft Tissue ◽  
Temporomandibular Joint ◽  
Alternative Technique ◽  
Resonance Imaging ◽  
Specific Patient ◽  
Therapeutic Applications ◽  
Invasive Method ◽  
Magnetic Resonance Imaging Mri

AbstractArthrography is an alternative technique for diagnosing soft tissue derangements of the temporomandibular joint (TMJ) when magnetic resonance imaging (MRI) is not an option. This can be due to contraindications to perform a MRI on a specific patient or when MRI is not applicable for specific diagnoses of soft tissue derangements of the TMJ. It is an invasive method and can be used not only for diagnostics but also for therapeutic injections e.g. administration of corticosteroids

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