In proton magnetic resonance (MR) spectroscopy (1H-MRS) of the breast cancer, choline peak could be detected. The purpose this study was to evaluate influences tumor volume, full width at half maximum (FWHM) water (FWHM), and T2* value (T2* value) on detection rate peaks 3.0 T-MRI. We measured FWHM in 109 cases, we evaluated effect volume peaks. 1H-MRS cancer T-MRI, improved as larger. As a shi...

Objective(s): We evaluated edge artifacts in relation to phantom diameter and reconstruction parameters in point spread function (PSF)-based positron emission tomography (PET) image reconstruction.Methods: PET data were acquired from an original cone-shaped phantom filled with 18F solution (21.9 kBq/mL) for 10 min using a Biograph mCT scanner. The images were reconstructed using the baseline or...

background: obtaining high quality images in single photon emission tomography (spect) device  is the most important goal in nuclear medicine. because if image quality is low, the possibility of making a mistake in diagnosing and treating the patient will rise. studying effective factors in spatial resolution of imaging systems is thus deemed to be vital. one of the most important factors in sp...

the monte carlo method can be used to describe any technique that approximates solutions to quantitative problems through statistical sampling. this method is considered to be the most accurate method for dose calculation in radiotherapy. for complete modeling of a linear accelerator, it is required that the manufactured information covers all data, but some data such as primary electron energy...

OBJECTIVE The aim of this study was to characterize the optimal reconstruction parameters for ordered-subset expectation maximization (OSEM) with attenuation correction, scatter correction, and depth-dependent resolution recovery (OSEMACSCRR). We assessed the optimal parameters for OSEMACSCRR in an anthropomorphic torso phantom study, and evaluated the validity of the reconstruction parameters ...

In this paper, we present a set of optimal graphene-based multilayer surface plasmon resonance (SPR) biosensors for highly sensitive detection biomolecules. To optimize the biosensor structure, employed multi-objective gray wolf optimizer (MOGWO) to maximize sensitivity and minimize structure full width at half maximum (FWHM). The main advantages optimized structures are high sensitivity, low F...

background: hadron therapy for malignant tumor is becoming increasingly popular. there are many factors which effect on implementation of a proper treatment planning. the purpose of this work is to investigate the inhomogeneity effects as affecting factor on proton range, full width at half maximum (fwhm) and 20% position of penumbra (p20) by mcnpx code. materials and methods: an inhomogeneous ...

Background: Hadron therapy for malignant tumor is becoming increasingly popular. There are many factors which effect on implementation of a proper treatment planning. The purpose of this work is to investigate the inhomogeneity effects as affecting factor on proton range, Full width at half maximum (FWHM) and 20% position of penumbra (P20) by MCNPX code. Materials and Methods: An inhomogeneous ...

Background Duchenne Muscular Dystrophy (DMD), a lethal X-linked skeletal and cardiac myopathy, affects 1/3500 males[1-2]. MRI studies have shown occult ventricular dysfunction and myocardial fibrosis in DMD patients. Previously we used the Full Width of Half Maximum (FWHM) of T2 distribution in LV to quantify the myocardial structural heterogeneity in DMD patients. In DMD subject groups, we sho...