an accelerated shelf-life test using elevated temperatures 62, 72 and 82 ˚c was conducted to predict the oxidation progression of walnuts over a long-term storage. oxidation parameters including values of conjugated dienes (cd) and trienes (ct) values and thiobarbituric acid (tba) value were employed to evaluate the oxidation processes. changes followed an apparent first-order kinetic. walnuts ...

In this paper, we present a novel projection-based novel noise reduction method for photon counting energy resolving detectors in Spectral Computed Tomography (CT) imaging. In order to denoise the projection data, a guidance image from all energy channels is computed, which employs a variant of the joint bilateral filter to denoise each energy bin individually. The method is evaluated by a simu...

Quantitative tissue classification using dual-energy CT has the potential to improve accuracy in radiation therapy dose planning as it provides more information about material composition of scanned objects than the currently used methods based on single-energy CT. One problem that hinders successful application of both singleand dualenergy CT is the presence of beam hardening and scatter artif...

OBJECTIVE To quantitatively assess the imaging characteristics of sellar lesion in dual-energy computed tomography (CT) imaging for differentiation of sellar meningiomas and pituitary adenomas during the arterial phase (AP) and venous phase (VP). MATERIALS AND METHODS 51 patients with sellar/parasellar tumors (33 macroadenomas and 18 meningiomas) were examined with CT spectral imaging during ...

In this work we demonstrate the proof of principle of CT-based attenuation correction of 3D positron emission tomography (PET) data by using scans of bone and soft tissue equivalent phantoms and scans of humans. This method of attenuation correction is intended for use in a single scanner that combines volume-imaging (3D) PET with x-ray computed tomography (CT) for the purpose of providing accu...

UNLABELLED The aim of this study was to evaluate differences in dopamine transporter SPECT images among different SPECT/CT devices and to determine the most appropriate region of interest (ROI) for semiquantitative evaluation. METHODS An anthropomorphic striatal phantom was filled with (123)I solutions of different striatum-to-background radioactivity ratios. Data were acquired using 2 SPECT/...

With the diffusion of non-linear and unbalanced loads, which often cause unacceptable quality level of energy, energy quality monitoring represents an increasing need. Analyzing conducted disturbances requires measuring instrumentation, and thus voltage and current transducers, with large bandwidth. Voltage and current transformers (CT) are the most often installed transducers in electrical pow...