نتایج جستجو برای: mra parseval frame multiwavelets
تعداد نتایج: 104848 فیلتر نتایج به سال:
Background and purpose: Determining the severity and site of rotator cuff tear (RCT) is very important for choosing a treatment method. In this study, the diagnostic value of indirect magnetic resonance arthrography (I-MRA) and magnetic resonance imaging (MRI) were compared. Materials and methods: This cross-sectional study was performed in 36 patients attending an orthopedic clinic in 2020. P...
In this paper we show that the shearlets, an affine-like system of functions recently introduced by the authors and their collaborators, are essentially optimal in representing 2–dimensional functions f that are C2 except for discontinuities along C2 curves. More specifically, if fS N is the N–term reconstruction of f obtained by using the N largest coefficients in the shearlet representation, ...
This paper investigates the Parseval relationship of samples associated with the fractional Fourier transform. Firstly, the Parseval relationship for uniform samples of band-limited signal is obtained. Then, the relationship is extended to a general set of nonuniform samples of band-limited signal associated with the fractional Fourier transform. Finally, the two dimensional case is investigate...
BACKGROUND AND PURPOSE MR angiography (MRA) is increasingly used as a noninvasive imaging technique for the follow-up of coiled intracranial aneurysms. However, the need for contrast enhancement has not yet been elucidated. We compared 3D time-of-flight MRA (TOF-MRA) and contrast-enhanced MRA (CE-MRA) at 3T with catheter angiography. MATERIALS AND METHODS Sixty-seven patients with 72 aneurysm...
This paper investigates the emerging notion of multiwavelets in the context of multirate filter banks, and applies a multiwavelet system to image coding. Multiwavelets are of interest because their constituent filters can be simultaneously symmetric and orthogonal (this combination is impossible for 2-band PR-QMFs), and because one can obtain higher orders of approximation (more vanishing wavel...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید