PURPOSE The problem of metal artifact reduction (MAR) is almost as old as the clinical use of computed tomography itself. When metal implants are present in the field of measurement, severe artifacts degrade the image quality and the diagnostic value of CT images. Up to now, no generally accepted solution to this issue has been found. In this work, a method based on a new MAR concept is present...

In a recent Letter [1] (and in ref. [2]), Filipponi, Pancheri and Srivastava report on the construction of a formula for linear Regge trajectories for all quark flavors: α j ¯ i (t) = 0.57 − (m i + m j) GeV + 0.9 GeV 2 1 + 0.2 (m i +m j GeV) 3/2 t, (1) where m i , m j are the corresponding constituent quark masses for the j ¯ i trajectory. As the authors of [1, 2] remark, no unique quark mass c...

a INRA, UR 546 Biostatistics and Spatial Processes, (BioSP), F-84914 Avignon, France b Mediterranean Institute of Oceanology, University of Aix-Marseille II, Parc Scientifique et Technologique de Luminy, Case 901, 13288 Marseille Cedex 9, France c Institute of Marine and Coastal Sciences, Rutgers University, 71 Dudley Rd, New Brunswick, NJ, USA d Université de la Nouvelle-Calédonie, Laboratoire...

It is well known that the category of super Lie groups (SLG) is equivalent to the category of super Harish-Chandra pairs (SHCP). Using this equivalence, we define the category of unitary representations (UR’s) of a super Lie group. We give an extension of the classical inducing construction and Mackey imprimitivity theorem to this setting. We use our results to classify the irreducible unitary ...

Introduction: Delivered dose of solute removal (assessed by Kt/v) is an important determinant of clinical outcome in chronic dialysis patients. The gold standard for Kt/v is the direct quantification of the removed urea. A new method, ionic dialysance has been suggested and used over the years. This method is faster, less expensive and non invasive. The objective of this study is to determine t...

In recent years, several combinatorial problems were introduced in the area of access control. Typically, such problems deal with an authorization policy, seen as a relation UR ⊆ U ×R, where (u, r) ∈ UR means that user u is authorized to access resource r. Li, Tripunitara and Wang (2009) introduced the Resiliency Checking Problem (RCP), in which we are given an authorization policy, a subset of...

Polioxometalatoen (PoMen) konposizio eta egitura aniztasun ikaragarria ur disoluzioan aurkezten dituzten oreka kimiko dinamikoen emaitza da. Izan ere, haien eraketa prozesuak ingurune azidotan gertatzen diren oxoanioien kondentsazio konplexuetan oinarrituta daude, eta, ondorioz, pH baldintza jakinetan zenbait metal-oxigeno kluster daude orekan. Hortaz, PoMei dagozkien topologia garrantzitsuenen...

tepe sagzabad, a site situated on the qazvin plain of north-central iran, was excavated from 1970 to 1998 by the institute ofarchaeology of tehran university. recent excavations by h. tala’i (1997-1999) yielded some metal artifacts dating to theearly iron age. ten of these copper-based samples were investigated using inductively coupled plasma optical emissionspectroscopy (icp-oes), scanning el...

This study proposes a new method for removal of metal artifacts from megavoltage cone beam computed tomography (MVCBCT) and kilovoltage CT (kVCT) images. Both images were combined to obtain prior image, which was forward projected to obtain surrogate data and replace metal trace in the uncorrected kVCT image. The corrected image was then reconstructed through filtered back projection. A similar...