in present pet/ct scanners, pet attenuation correction is performed by relying on the information given by ct scan. in the ct-based attenuation correction methods, dual-energy technique (dect) is the most accurate approach, which has been limited due to the increasing patient dose. in this feasibility study, we have introduced a new method that can implement dual-energy technique with only a si...

[no abstract available]

in this paper, we use parametric form of fuzzy number and we converta fuzzy linear system to two linear system in crisp case. conditions for the existence of a minimal solution to $mtimes n$ fuzzy linear equation systems are derived and a numerical procedure for calculating the minimal solution is designed. numerical examples are presented to illustrate the proposed method.

in this paper a new algorithm is presented for coherent radar detection of targets, when distribution of the interference (clutter and noise) is non-gaussian. the neyman-pearson criterion is used for optimal detection and several successive received samples from a radar range cell are used for detection in the same cell. on the basis of recent empirical evidences, the interference distribution ...

(∆− λ)f = T for a Γ-invariant distribution T on H, compactly-supported on Γ\H. The three main examples for T are described in detail below. That is, a slight roughness is tolerated in f at the support of the Γ-invariant distribution T . Three natural types of target distributions T are: (i) T is supported at a single point on Γ\H, (ii) T is supported on a closed geodesic on Γ\H, (iii) T evaluat...

BACKGROUND AND OBJECTIVES: Pseudo pancreatic cyst is a common complication of pancreatitis. Accurate diagnosis and timely management is important. This study is to know the various etiological factors, relative frequency of occurrence of pseudo pancreatic cyst in relation to age and sex, establish accurate diagnosis by various investigations and to study various modes of management like conserv...

To cite: Arneill M, Wilson P, Hennessey D, et al. BMJ Case Rep Published online: [please include Day Month Year] doi:10.1136/bcr-2013201182 DESCRIPTION We report the case of a 67-year-old man with chronic pseudo-obstruction who presented to hospital with bilateral lower leg cellulitis. His medical history included depression and anxiety. Surgical history included a perforated sigmoid volvulus t...