Attenuation correction is necessary for quantification in micro-single-photon emission computed tomography (micro-SPECT). In general, this is done based on micro-computed tomographic (micro-CT) images. Derivation of the attenuation map from magnetic resonance (MR) images is difficult because bone and lung are invisible in conventional MR images and hence indistinguishable from air. An ultrashor...

Segmentation of brain from magnetic resonance (MR) images has important applications in neuroimaging, in particular it facilitates in extracting different brain tissues such as cerebrospinal fluids, white matter and gray matter. That helps in determining the volume of the tissues in three-dimensional brain MR images, which yields in analyzing many neural disorders such as epilepsy and Alzheimer...

Understanding the complex architecture, connectivity, and pathology of the human brain is a major application of magnetic resonance imaging (MRI). However, the cellular basis of MR signal is still poorly understood. The advent of MR microscopy (MRM) enables imaging biological samples at cellular resolution, helping to interpret the nature of MR signal at the cellular level. In this regard, the ...

Plain and Gd-DTPA-enhanced MR images of the brain were obtained in 18 consecutive patients with meningitis (eight with tuberculous, five with bacterial, three with viral, and two with fungal infections); the MR images were compared with CT scans. MR images were obtained on a 2.0-T superconducting unit with both T1- and T2-weighted pulse sequences before injection and with a T1-weighted sequence...

Oxygen metabolism is a key factor in the life of living organism. The article first part review methods for measuring oxygen metabolism. Purpose. aim this to present an insight into evolution way from global local measurement brain perfusion. role 15 O isotope as “gold standard” using positron emission tomography (PET) described. We also provide case report tumor perfusion measurements our clin...

A case of rhizomelic chondrodysplasia punctata was investigated with MR imaging of the brain and hydrogen-1 MR spectroscopy of the brain and blood. Areas with abnormal signal hyperintensity on T2-weighted images or hypointensity on T1-weighted images were detected in the subcortical white matter. MR spectroscopy of the brain showed that normal-appearing white matter was characterized by increas...

Brain tumors are one of the most dangerous diseases that continue to be threatened worldwide.As a result, diagnosis and treatment in early stages very important this case. As Furthermore, determination correct nature tumor is sensitive process patient .In recent years, with advancement deep learning solutions computer vision, such as image segmentation, classification, object detection, promisi...

The aim of this study was to computationally model, in an unsupervised manner, a manifold symmetry variations normal brains, such that the learned can be used segment brain tumors from magnetic resonance (MR) images fail exhibit symmetry. An tumor segmentation method, named as symmetric driven generative adversarial network (SD-GAN), proposed. SD-GAN model trained learn non-linear mapping betwe...

As in osmoregulation, mineralocorticoid signaling is implicated in the control of brain-behavior actions. Nevertheless, the understanding of this role is limited, partly due to the mortality of mineralocorticoid receptor (MR)-knockout (KO) mice due to impaired Na+ reabsorption. In teleost fish, a distinct mineralocorticoid system has only been identified recently. Here, we generated a constitut...