The purpose of this study was to compare the image noise-reducing abilities of iterative model reconstruction (IMR) with those of traditional filtered back projection (FBP) and statistical iterative reconstruction (IR) in abdominal computed tomography (CT) imagesThis institutional review board-approved retrospective study enrolled 103 patients; informed consent was waived. Urinary bladder (n = ...

Objective: To evaluate the effect of low tube voltage (100 kV) combined with adaptive statistical iterative reconstruction-V (ASIR-V) on visualization and image quality Adamkiewicz artery (AKA). Methods: One hundred patients were prospectively enrolled randomly assigned into two groups (both n = 50). Group A was reconstructed filtered back projection (FBP) ASIR-V from 10% to 100% intervals. B (...

Mast cells (MC) are primary effector cells of IgEmediated allergic inflammation. Nitric oxide (NO) is a short-lived free radical that regulates MC activities including inhibition of MC degranulation. To elucidate the molecular mechanisms underlying the effects of NO in MC, we investigated protein tyrosine nitration in human mast cell lines treated with the NO donor SNitrosoglutathione (SNOG). U...

We consider the reconstruction problem for limited angle tomography using filtered backprojection (FBP) and Lambda tomography. We use microlocal analysis to explain why the well-known streak artifacts are present at the end of the limited angular range. We explain how to mitigate the streaks and prove that our modified FBP and Lambda operators are standard pseudodifferential operators, and so t...

PURPOSE The spline reconstruction technique (SRT), based on the analytic formula for the inverse Radon transform, has been presented earlier in the literature. In this study, the authors present an improved formulation and numerical implementation of this algorithm and evaluate it in comparison to filtered backprojection (FBP). METHODS The SRT is based on the numerical evaluation of the Hilbe...

A single fructose1,6-bisphosphate (FBP) aldolase has been detected in extracts from carrot storage roots (Daucus carota L.). The enzyme was purified 850-fold to electrophoretic homogeneity and a final specific activity of 26.3 amol of FBP utilized/min per mg of protein. SDS/PAGE of the final preparation revealed a single protein-staining band of 40 kDa. The native molecular mass was determined ...

Filtered back-projection (FBP) has been commonly used as an efficient and robust reconstruction technique in tomographic X-ray imaging during the last decades. For limited angle tomography acquisitions such as digital breast tomosynthesis, however, standard FBP reconstruction algorithms provide poor results and give rise to image artifacts due to the limited angular range and the coarse angular...

To achieve approximately parallel projection geometry, traditional optical projection tomography (OPT) requires the use of low numerical aperture (NA) objectives, which have a long depth-of-field at the expense of poor lateral resolution. Particularly promising methods to improve spatial resolution include ad-hoc post-processing filters that limit the effect of the system's MTF and focal-plane-...

We revisit here the mathematical model for ATP production in mitochondria introduced recently by Bertram, Pedersen, Luciani, and Sherman (BPLS) as a simplification of the more complete but intricate Magnus and Keizer's model. We identify some inaccuracies in the BPLS original approximations for two flux rates, namely the adenine nucleotide translocator rate JANT and the calcium uniporter rate J...

OBJECTIVES To compare image quality on computed tomographic (CT) images acquired with filtered back-projection (FBP), adaptive statistical iterative reconstruction (ASIR) and model-based iterative reconstruction (MBIR) techniques in CT kidney/ureter/bladder (KUB) examination. METHODS Eighteen patients underwent standard protocol CT KUB at our institution. The same raw data were reconstructed ...