Phase contrast
Idiopathic Spinal Cord Herniation: Value of MR Phase Contrast Imaging
... with contrast medium at mye- ...images. Phase-contrast im- aging may be useful for delineating the cyst when it is distended by showing decreased CSF flow within it (Fig ...patients, ...
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Segmentation of Activated Sludge Filaments using Phase Contrast Microscopic Images
... In this section, we will discuss the results of the segmentation of phase contrast images for different algorithms. For result of edge based segmentation, most of the filaments are segmented because the ...
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Phase Contrast Neutron Imaging using Single and Multiple Pinhole Apertures
... The geometric blurring takes place due to the spread of the neutron source and depends upon the sample-to-detector distance R as well as the L d ratio of the system where L is the source-to-sample distance and d is the ...
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Effects of gadolinium contrast agent on aortic blood flow and myocardial strain measurements by phase contrast cardiovascular magnetic resonance
... In this study, we did not optimise sequence parameters previously reported by others to be significant to the results such as slice thickness and orientation, or spatial resolution[5]. Instead, we used a ...
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Method for calculating confidence intervals for phase contrast flow measurements
... Background: Phase contrast (PC) measurements play an important role in several cardiovascular magnetic resonance (CMR) protocols but considerable variation is observed in such ...
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Edge enhancement via phase contrast filtering: A new technique.
... An alternate technique has been proposed by Soltis [1] which he termed 'phase contrast filtering' (PCF). It is the intent of the thesis to examine this new technique on the basis of its edge enhancement ...
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Accuracy and Reproducibility of Phase Contrast MR Imaging Measurements for CSF Flow
... and phase errors that are not compensated for by the current pre-emphasis ...in phase-contrast measurements with low VENC settings, such as in the investigation of CSF ...
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MRI phase contrast flow velocity imaging of main pulmonary artery.
... underwent phase contrast flow velocity imaging 22 subjects were female and 28 were ...MRI phase contrast flow velocity imaging 40 subjects had average velocity less than ...
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Qualitative phase contrast MRA in the normal and abnormal circle of Willis
... 8 , The phase contrast image with flow encoding in the right-left direction shows retrograde flow in the ipsilateral A 1 segment of the anterior cerebral artery ie, black indicating righ[r] ...
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Simulation of phase contrast angiography for renal arterial models
... is phase contrast angiography (PCA)—a non-contrast enhanced magnetic resonance imag- ing (MRI) ...signal phase relative to blood flow ...[5], phase contrast angiography has ...
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Cardiovascular magnetic resonance phase contrast imaging
... The governing equations that describe the flow of fluid through a prescribed geometry are the Navier-Stokes equations. Numerically solving these equations using CFD models yields the velocity field. In general, although ...
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Anatomical Assessment of Cerebral Venous System by 3D phase contrast MR Venography
... 3D phase contrast magnetic resonance venography, contrast enhanced magnetic resonance venography, superior sagittal sinus, transverse sinus, sigmoid sinus and arachnoid ...
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Towards a deeper understanding of structural biomass recalcitrance using phase-contrast tomography
... by phase-contrast tomography The cellular organization in the piassava fibers was studied by PCT using synchrotron ...A phase retrieval algorithm for tomographic reconstruc- tion based on Paganin et ...
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Blood flow in major cerebral arteries measured by phase contrast cine MR
... PURPOSE: To measure mean blood flow in individual cerebral arteries carotid , basilar, anterior cerebral, middle cerebral , and posterior cerebral using a cine phase contrast MR pulse se[r] ...
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Velocity Measurements in the Middle Cerebral Arteries of Healthy Volunteers Using 3D Radial Phase Contrast HYPRFlow: Comparison with Transcranial Doppler Sonography and 2D Phase Contrast MR Imaging
... ⫽ contrast-enhanced; CE-VIPR ⫽ contrast-enhanced vastly undersampled isotropic projection reconstruction; 2D-PC ⫽ 2D phase-contrast; HYPR-LR ⫽ highly constrained local projection ...
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Baseline correction of phase contrast images in congenital cardiovascular magnetic resonance
... these phase-contrast measurements in patients with known or suspected heart ...greater phase offset errors, with 22% of the changes in PC flow measurements attributed to the size of the vessel ...
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Analysis of temperature dependence of background phase errors in phase contrast cardiovascular magnetic resonance
... background phase correction ap- proaches have been proposed: a) repetition of the phase contrast sequence on a stationary phantom and b) refer- encing in stationary tissue ...the phase error ...
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Three dimensional phase contrast MR angiography in the head and neck: preliminary report
... B, Collapse image of subset of sagittal slices through right internal carotid artery.. C and D, Anteroposterior C and lateral D contrast angiograms after right common carotid injection.[r] ...
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Phase contrast imaging of the parotid region
... Recommended screening of the parotid fossa that optimizes tissue-lesion contrast, lesion detectability, and imaging time is performed by combining a standard T1-weighted acquisition with[r] ...
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Phase Contrast MR Imaging Support for the Diagnosis of Aqueductal Stenosis
... resent the “mobile compliance” of the subarachnoid and ventricular compartments and contribute to rapid regulation of intracranial pressure throughout the CC. By definition, all patients had no de- tected CSF flow at the ...
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