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ABFM NEWS - Ressonância Magnética
 
Checking Urine to Diagnose... Pneumonia?
 
"Somewhere, every minute, a patient with a fever is getting a chest X-Ray to look for pneumonia and a urinalysis to look for UTI. New research by UC Davis biochemist Carolyn Slupsky and others may one day prove that there|s enough in urine to diagnose pneumonia, on its own: " [+ leia mais]
Colaborador: Guilherme Agreli
Fonte: MedGadget
 
 
"Identification of breast calcification using magnetic resonance imaging"
 
MRI phase and magnitude images provide information about local magnetic field variation (B0), which can consequently be used to understand tissue properties. [+ leia mais]
Colaborador: Érika Yumi Watanabe
Fonte: Medical Physics
 
 
Accuracy of real time noninvasive temperature measurements using magnetic resonance thermal imaging in patients treated for high grade extremity soft
 
Purpose: To establish accuracy of real time noninvasive temperature measurements using magnetic resonance thermal imaging in patients treated for high grade extremity soft tissue sarcomas [+ leia mais]
Colaborador: Érika Yumi Watanabe
Fonte: Medical Physics
 
 
Insight into the immune system
 
By means of nuclear magnetic resonance on 129Xe atoms, scientists from PTB
have managed to spectroscopically demonstrate the bond of a pathogenic germ to
a protein which is important for the immune system. [+ leia mais]
Colaborador: Laura Natal Rodrigues
Fonte: Physikalisch-Techische Bundesanstalt - PTB
 
 
Quantitative contrast-enhanced myocardial perfusion magnetic resonance imaging: Simulation of bolus dispersion in constricted vessels.
 
Quantification of myocardial blood flow (MBF) by means of T1-weighted first-pass magnetic resonance imaging (MRI) requires knowledge of the arterial input function (AIF), which is usually estimated from the left ventricle (LV). [+ leia mais]
Colaborador: Cássio Vilela Komatsu.
Fonte: Medical Physics.
 
 
Measurement of MRI scanner performance with the ADNI phantom.
 
The objectives of this study are as follows: to describe practical implementation challenges of multisite, multivendor quantitative studies; to describe the MRI phantom and analysis software used in the Alzheimer|s Disease Neuroimaging Initiative (ADNI) study... [+ leia mais]
Colaborador: Cássio Vilela Komatsu.
Fonte: Medical Physics.
 
 
Brain imaging skewed.
 
Double dipping of data magnifies errors in functional MRI scans. [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Nature News.
 
 
Magnetic Spin to Revolutionize Medical Scanning.
 
A novel method of transferring magnetic spin can amplify the sensitivity of magnetic resonance imaging (MRI) a thousandfold, according to new research from the University of York in the United Kingdom. [+ leia mais]
Colaborador: Laura Natal Rodrigues.
Fonte: Technology Review.
 
 
Three-dimensional real-time in vivo magnetic particle imaging.
 
Magnetic particle imaging (MPI) is a new tomographic imaging method potentially capable of rapid 3D dynamic imaging of magnetic tracer materials. Until now, only dynamic 2D phantom experiments with high tracer concentrations have been demonstrated... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Physics in Medicine and Biology.
 
 
Quantitation of brain tissue changes associated with white matter hyperintensities by diffusion-weighted and magnetization transfer imaging:...
 
To explore the value of diffusion-weighted imaging (DWI) and magnetization transfer imaging (MTI) for the improved detection and quantification of cerebral tissue changes associated with ageing and white matter hyperintensities (WMH)... [+ leia mais]
Colaborador: Alessandro André Mazzola.
Fonte: Journal of Magnetic Resonance Imaging.
 
 
A new single acquisition, two-image difference method for determining MR image SNR.
 
A new method for computing the signal-to-noise ratio (SNR) of magnetic resonance images is presented. The proposed method is a “difference of images” based technique where two images are produced from one acquisition in which the readout direction field of view (FOV) and matrix size are doubled compared to the phase encode direction... [+ leia mais]
Colaborador: Alessandro André Mazzola.
Fonte: Medical Physics.
 
 
In vivo quantification of contrast agent concentration using the induced magnetic field for time-resolved arterial input function measurement with MRI
 
For pharmacokinetic modeling of tissue physiology, there is great interest in measuring the arterial input function (AIF) from dynamic contrast-enhanced (DCE) magnetic resonance imaging (MRI) using paramagnetic contrast agents... [+ leia mais]
Colaborador: Alessandro André Mazzola.
Fonte: Medical Physics.
 
 
Perfusion Tensor Imaging.
 
Arterial spin labeling (ASL) provides a method by which to noninvasively measure the spatial and temporal characteristics of local tissue perfusion. Standard methods employ spatial tagging schemes, but recently methods based on velocity dependent tags, called Velocity Selective ASL (VSASL), have been introduced wherein the tagging depends upon the vascular velocity profile... [+ leia mais]
Colaborador: Alessandro André Mazzola.
Fonte: Magnetic Resonance in Medicine.
 
 
Does Diffusion-Tensor MR Imaging Provide Accurate Tracing of Specific White Matter Tracts That Correspond to Actual Anatomic and Functional Units...
 
In their study, Yamada et al showed in marmoset monkeys that the visual pathway traced by using diffusion-tensor imaging matches well with the tracts traced by using manganese-enhanced MR imaging, demonstrating this for the first time in a primate model with well-developed binocular vision, unlike rodents. [+ leia mais]
Colaborador: Alessandro André Mazzola.
Fonte: Radiology.
 
 
Review: Dixon techniques for water and fat imaging.
 
In 1984, Dixon published a first paper on a simple spectroscopic imaging technique for water and fat separation. The technique acquires two separate images with a modified spin echo pulse sequence... [+ leia mais]
Colaborador: Alessandro André Mazzola.
Fonte: Journal of Magnetic Resonance Imaging.
 
 
3T MRI superior to 1.5T MRI in epilepsy evaluation.
 
A study from Oregon Health & Science University (OHSU) has concluded that 3-tesla MRI is superior to 1.5-tesla MRI in detecting and accurately characterizing structural brain abnormalities in a group of patients undergoing whole-brain epilepsy evaluation... [+ leia mais]
Colaborador: Alessandro André Mazzola.
Fonte: Auntminnie.
 
 
MRI magnet explosions warrant improved venting and inspections.
 
At least five MRI magnets have exploded in U.S. healthcare facilities over the last 10 years, but the incidents have gone mostly unreported, according to Wlad Sobol, Ph.D., a medical physicist and professor of radiology at the University of Alabama at Birmingham (UAB) Health System... [+ leia mais]
Colaborador: Alessandro André Mazzola.
Fonte: Auntminnie.
 
 
Effect of Age and Tumor Grade on BOLD Functional MR Imaging in Preoperative Assessment of Patients with Glioma.
 
To retrospectively determine if there was a combined effect of advanced age and increased tumor grade on blood oxygen level–dependent (BOLD) functional magnetic resonance (MR) imaging signal intensity (SI) in patients with gliomas... [+ leia mais]
Colaborador: Alessandro André Mazzola.
Fonte: Radiology.
 
 
Quantitative magnetization transfer imaging using balanced SSFP.
 
It is generally accepted that signal formation in balanced steady-state free precession (bSSFP) is a simple function of relaxation times and flip angle only... [+ leia mais]
Colaborador: Alessandro André Mazzola.
Fonte: Magnetic Resonance in Medicine.
 
 
Is NSF only the tip of the gadolinium toxicity iceberg?
 
Is NSF only the tip of the "gadolinium toxicity" iceberg? [+ leia mais]
Colaborador: Alessandro André Mazzola.
Fonte: Journal of Magnetic Resonance Imaging.
 
 
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