Multitemporal analysis of very high resolution images has gained an ever increasing attention due to the availability of several satellite platforms with different spectral and geometrical resolutions and revisit times. The last generation of multispectral sensors (e.g., Quickbird, Ikonos, SPOT-5) can acquire a panchromatic (Pan) image characterized by a very high geometrical resolution and a s...

Recent progress in digital subtraction angiography (DSA) devices makes it possible to perform rotational angiography with high resolution and high sensitivity. We tried intravenous (IV) 3D DSA in patients who had undergone MR angiography (MRA) suggestive of unruptured intracranial aneurysms. IV 3D DSA can be used as an alternative method for imaging unruptured intracranial aneurysms suggested o...

BACKGROUND AND PURPOSE A method is presented for high-temporal-resolution MR angiography (MRA) using a combination of undersampling strategies and a high-field (3T) scanner. Currently, the evaluation of cerebrovascular disorders involving arteriovenous shunting or retrograde flow is accomplished with conventional radiographic digital subtraction angiography, because of its high spatial and temp...

Time-resolved MR angiography (MRA) has been proposed as a non-invasive and nonionizing imaging method. Compared with monophasic CTA and MRA it provides better arteriovenous differentiation and functional dynamic information that so far has been gained only with DSA. When contrast-enhanced MRA was first introduced in 1993 acquisition time was in the range of several minutes. In addition the imag...

Fig. 3: (a) Morphometric analysis of cross-sectional areas at various levels relative to the stenosis for MR angiography (top) and histology (bottom) for one representative animal. Correlation of MRA with histology for vessel lumen area (b) and DoS (c). Accelerated high-resolution 3D magnetic resonance angiography using SENSE: fast and accurate assessment of carotid artery stenosis in ApoE ko mice

background traditional digital subtraction angiography (dsa) is currently the gold standard diagnostic method for the diagnosis and evaluation of cerebral arteriovenous malformation (avm) and dural arteriovenous fistulas (davf). objectives the aim of this study was to analyze different less invasive magnetic resonance angiography (mra) images, time-resolved mra (tr-mra) and three-dimensional ti...

Gabor frames, especially digital Gabor filters, have long been known as indispensable tools for local time-frequency analysis of discrete signals. With strong orientation selectivity, tensor products discrete (tight) Gabor frames also see their applications in image analysis and restoration. However, the lack of multi-scale structures existing in MRA-based wavelet (tight) frames makes discrete ...

Ö Z E T : Bu makalede, gravite anomalilerinin ayr›m problemi için DiscreteParameter Wavelet Transform (DPWT) 2-B Multi-Resolution Analizi (MRA) k u l l a n › l d › . Yüzeye yak›n kürelerin ortalama derinliklerini bulmak için güç spekturum analizi kullan›ld›. Yöntemin geçerlili¤ini test etmek için sentetik yap›lar kulland›k ve memnun edici neticeler bulduk. Gömülü cisimlerin ortalama derinlikler...

Introduction: There have been many attempts to increase the temporal resolution of time-resolved MRA, including sliding window reconstruction (1-2), TRICKS (3), and HYPR (4). Although these techniques achieve high frame rates, each frame still contains data acquired over a long temporal window, typically longer than 10 seconds. In other words, the frames have long temporal footprints. We introd...

Modified Reconstructibility Analysis (MRA), a novel decomposition within the framework of set-theoretic (crisp possibilistic) reconstructibility analysis, is presented. It is shown that in some cases, while three-variable NPNclassified Boolean functions are not decomposable using Conventional Reconstructibility Analysis (CRA), they are decomposable using MRA. Also, it is shown that whenever a d...