Detection rapidity and model accuracy are the keys to hyperspectral nondestructive testing technology, especially for Pennisetum sinese Roxb (PsR) due its extremely high adsorptive heavy metal content. The study of resolution PsR is conducive analysis accumulated content in different parts. In this paper, contents Cd, Cu Zn old leaves, young upper stem, middle stem lower as well data correspond...

OBJECTIVES Combined positron emission tomography (PET) and magnetic resonance imaging (MRI) targeting the prostate-specific membrane antigen (PSMA) with a 68Ga-labelled PSMA-analog (68Ga-PSMA-11) is discussed as a promising diagnostic method for patients with suspicion or history of prostate cancer. One potential drawback of this method are severe photopenic (halo-) artifacts surrounding the bl...

PURPOSE Patient-specific dosimetry of lutetium-177 ((177)Lu)-DOTATATE treatment in neuroendocrine tumours is important, because uptake differs across patients. Single photon emission computer tomography (SPECT)-based dosimetry requires a conversion factor between the obtained counts and the activity, which depends on the collimator type, the utilized energy windows and the applied scatter corre...

the potential of vis-ir (400–1100 nm) transmittance method to assess the internal quality (freshness) of intact chicken egg during storage at a temperature of 307 oc and 25% 4 relative humidity was investigated. one hundred chicken egg samples were used for measuring its freshness and spectral collection during egg storage times (up to 30 days). two correlation models between haugh unit (hu) an...

UNLABELLED We determined the relative effect of corrections for scatter, depth-dependent collimator response, attenuation, and finite spatial resolution on various image characteristics in cardiac SPECT. METHODS Monte Carlo simulations and real acquisition of a 99mTc cardiac phantom were performed under comparable conditions. Simulated and acquired data were reconstructed using several correc...

The purpose of this study was to assess the influence of different reconstruction factors in N-ω-fluoropropyl-2β-carbomethoxy-3β-(4-I-123 iodophenyl)nortropane (I-123 FP-CIT) single-photon emission computed tomography (SPECT) images for the diagnosis of dopaminergic system neurodegeneration (DSND).Seventy-three patients (38 females, 35 males) suspected of DSND were included in this study. The p...

Subject-specific artifacts caused by head motion and physiological noise are major confounds in BOLD fMRI analyses. However, there is little consensus on the optimal choice of data preprocessing steps to minimize these effects. To evaluate the effects of various preprocessing strategies, we present a framework which comprises a combination of (1) nonparametric testing including reproducibility ...

UNLABELLED Planar gamma-scintigraphy is often used to quantify pulmonary deposition patterns from aerosol inhalers. The results are quite different from those obtained using 3-dimensional PET and SPECT. The purpose of this study was to characterize the effects of scatter and tissue attenuation on the distribution of radiolabeled aerosol as measured by planar scintigraphy using Monte Carlo simul...