UNLABELLED Does subtraction scintigraphy improve the diagnostic utility of scintigraphic evaluation in acute lower gastrointestinal hemorrhage? METHODS This research was a retrospective clinical study using a repeat-measures design of randomized control and experimental groups. A single patient dataset provided both the control group (conventional scintigraphy) and the experimental group (con...

We investigated and evaluated the detection of simulated lesions in various interstitial lung diseases using the dual-energy subtraction radiography method and flat-panel detector (FPD) images. We obtained a FPD system (GE Revolution XR/d), and employed dual-energy 60 kV and 130 kV exposure techniques. Three types of lung lesions, namely, micro-nodule, ground-glass, and honeycomb patterns were ...

The proton-polarizability contribution to the muonic-hydrogen Lamb shift is a major source of theoretical uncertainty in extraction proton charge radius. An empirical evaluation this effect, based on structure functions, requires systematically improvable calculation "subtraction function", possibly using lattice QCD. We consider different subtraction point, with aim accessing function directly...

pectral subtraction is a method for restoration of the power spectrum or the magnitude spectrum of a signal observed in additive noise, through subtraction of an estimate of the average noise spectrum from the noisy signal spectrum. The noise spectrum is usually estimated, and updated, from the periods when the signal is absent and only the noise is present. The assumption is that the noise is ...

Background subtraction is a commonly used class of techniques for segmenting out objects of interest in a scene for applications such as surveillance. This paper surveys a representative sample of the published techiques for background subtraction, and analyses them with respect to three important attributes: foreground detection; background maintenance; and postprocessing.

The subtraction method, first developed by Ziedses des Plantes [1] in 1953, eliminates overlying bone shadows from angiographic films, enhancing the display of vascular anatomy. To completely eliminate all bone details, however, a second order subtraction is sometimes necessary; this requires the superimposition of two mask films over the angiographic film to make the final subtraction print [2...

Molecular biology tools can be used to monitor and optimize biological treatment systems, but the application of nucleic acid-based tools has been hindered by the lack of available sequences for environmentally relevant biodegradation genes. The objective of our work was to extend an existing molecular method for eukaryotes to prokaryotes, allowing us to rapidly identify differentially expresse...

BACKGROUND AND PURPOSE A common task in radiology interpretation is visual comparison of images. The purpose of this study was to compare traditional side-by-side and in-place (flicker) image presentation modes with advanced methods for detecting primary brain tumors on MR imaging. MATERIALS AND METHODS We identified 66 patients with gliomas and 3 consecutive brain MR imaging examinations (a ...

The microwave scatterometer onboard the China-France Oceanography Satellite (CFOSAT Scatterometer, CSCAT) is first rotating fan-beam (RFSCAT) in operation. It used to obtain ocean surface wind field by measuring backscattering coefficient over a large observation swath. To estimate coefficient, needs measure scattered signal accurately. process of removing noise from echo (scattered plus noise)...