voxel size
Diffusion Anisotropy Measurement of Brain White Matter Is Affected by Voxel Size: Underestimation Occurs in Areas with Crossing Fibers
... conclusion, voxel size/shape– dependent underestima- tion of the FA occurs in regions where there are crossing ...isotropic voxel, but this is not always ...
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Effect of Voxel Size and Object Location in the Field of View on Detection of Bone Defects in Cone Beam Computed Tomography
... Image quality variations can be reduced or increased by altering the FOV, and the image reconstruction parameters and post-processing methods are studied based on the type of CBCT system used. The selected FOV for CBCT ...
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Contrast enhanced MR Angiography of Supraaortic Vessels: The Effect of Voxel Size on Image Quality
... From September to December 1998, 44 consecutive patients (24 men, 20 women; median age, 57 years [range, 43 to 90 years]) with suspected cerebrovascular disease were included in an ongoing study assessing the effect of ...
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Optimal voxel size for measuring global gray and white matter proton metabolite concentrations using chemical shift imaging.
... As a consequence, the choice of voxel size is fairly free when focus is on global gray and white matter metabolite concentrations. Often, however, sub-structures are of interest (such as individual ...
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Use of a C arm system to generate true three dimensional computed rotational angiograms: preliminary in vitro and in vivo results
... isotropic voxel size over the entire volume of interest, which is smaller than that attainable with any other cur- rently available 3-D imaging ...pixel size is larger than that achieved with DSA, we ...
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Experimental characterisation of shear and compaction band mechanisms in porous sandstone by a combination of AE and 3D-DIC
... μm voxel size) pre- and post-deformation x- ray tomography ...μm voxel size) pre- and post-deformation x-ray tomography images are presented ...
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Voxel-wise analysis of dynamic 18F-FET PET: a novel approach for non-invasive glioma characterisation
... Dynamic 18 F-FET PET scans were acquired on an ECAT EXACT HR+ scanner (Siemens Healthineers, Erlangen, Germany) after intravenous bolus injection of 176 ± 13 MBq 18 F-FET, according to the protocol described in [9, 11]. ...
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Compton imaging for homeland security
... Image charge analysis will provide an interaction position with respect to a strip bound- ary in both x and y by analysing the strips neighbouring one that contains an interac- tion. To simulate this effect being applied ...
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The Effect of Paramagnetic Contrast in Choline Peak in Patients with Glioblastoma Multiforme Might Not Be Significant
... spectroscopy was performed covering the largest area of T1/T2 ab- normality at the site of the tumor using point-resolved spectroscopy (TR/TE: 1500/135 ms) before and 6 –7 minutes after Gd injection (0.1 mmol/Kg) (Fig ...
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Cervical Spinal Cord DTI Is Improved by Reduced FOV with Specific Balance between the Number of Diffusion Gradient Directions and Averages
... DTI with parallel imaging, whose sequence scheme is different from the r-FOV scheme. The smaller voxel size in r-FOV inher- ently leads to a decrease of the signal-to-noise ratio. Classic strat- egies to ...
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Geoscientific process monitoring with positron emission tomography (GeoPET)
... PET is perfectly selective and by far the most sensitive method because the response is directly and only related to the number of decaying positrons, and thus also the num- ber of tracer atoms. Depending on the source ...
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Structural changes of cerebellum and brainstem in migraine without aura
... channel head coil at the Shanghai Key Laboratory of Magnetic Resonance (East China Normal University, Shanghai, China). The subjects were instructed not to move during the scans, and a Siemens dedicated filler was used ...
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Global Patch Matching (GPM) for freehand 3D ultrasound reconstruction
... each voxel in the 3D ultrasound ...each voxel is obtained by calculating the Euclidian distance between current voxel and the voxel with the minimum invariant ...vacant voxel can be ...
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Towards 3D-Electrical Capacitance Tomography for Interface Detection164-175
... optimal size of ECT electrodes ...required size of electrode to deliver the required SNR, the diameter of the electrode array (directly related to the diameter of the process vessel) and the desired ...
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COMPUTATION OF NORMAL VECTORS OF DISCRETE 3D OBJECTS: APPLICATION TO NATURAL SNOW IMAGES FROM X-RAY TOMOGRAPHY
... the size of the smallest detail we want to process ...surface voxel of the search neighborhood should remain connected together; this is mostly the case for snow at a resolution of 10 ...
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Common and distinct patterns of grey matter volume alteration in major depression and bipolar disorder: evidence from voxel based meta analysis
... 64 Molina V, Galindo G, Cortés B, Herrera AGS de, Ledo A, Sanz J et al. Different gray matter patterns in chronic schizophrenia and chronic bipolar disorder patients identified using voxel-based morphometry. Eur ...
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Porosity Analysis Based on CT Images of Coal Under Uniaxial Loading
... is needed. But due to the specimen deformation under loading, the position of the same voxel is constantly changing at different stage [12]. If coal matrix without pore is taken as the initial state, the ...
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Impact of Ischemic Lesion Location on the mRS Score in Patients with Ischemic Stroke: A Voxel Based Approach
... 2. Voxel-based lesion-symptom mapping of lesion impact on the modified Rankin Scale score calculated separately for each hemisphere (right side, n ⫽ 94; left side, n ⫽ 122) using no covariates (A); sex and age as ...
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Investigation of Techniques to increase the Field of View of a Staring Transducer Array for Photoacoustic Imaging
... The MAE was improved for the outer 5 mm of the imaging volume for some cube sizes at all numbers of directional points. All transducers directed towards the centre of the array yielded the lowest MAE for all ...
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Articles
... each voxel in the brain, is the most widespread approach to analyzing task-evoked functional Magnetic Resonance Imaging (fMRI) ...a voxel- wise threshold is ...for voxel-wise ...
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