The Role of Neuroimaging in the Diagnosis and Treatment of Depressive Disorder: A Recent Review

2018 ◽  
Vol 24 (22) ◽  
pp. 2515-2523 ◽  
Author(s):  
Tianbin Song ◽  
Xiaowei Han ◽  
Lei Du ◽  
Jing Che ◽  
Jing Liu ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Depressive Disorder ◽  
Diffusion Tensor ◽  
Single Photon ◽  
Rapid Development ◽  
Photon Emission ◽  
Clinical Manifestations ◽  
Brain Network ◽  
Emission Computed Tomography ◽  
Resonance Spectroscopy

Depression is a mental disorder with serious negative health outcomes. Its main clinical manifestations are depressed mood, slow thinking, loss of interest, and lack of energy. The rising incidence of depression has a major impact on patients and their families and imposes a substantial burden on society. With the rapid development of imaging technology in recent years, researchers have studied depression from different perspectives, including molecular, functional, and structural imaging. Many studies have revealed changes in structure, function, and metabolism in various brain regions in patients with depressive disorder. In this review, we summarize relevant studies of depression, including investigations using structural magnetic resonance imaging (MRI), functional MRI (task-state fMRI and resting-state fMRI), diffusion tensor imaging (DTI), magnetic resonance spectroscopy (MRS), brain network and molecular imaging (positron emission tomography [PET] and single photon emission computed tomography [SPECT]), which have contributed to our understanding of the etiology, neuropathology, and pathogenesis of depressive disorder.

scholarly journals Determining Surgical Candidacy in Temporal Lobe Epilepsy

2012 ◽  
Vol 2012 ◽  
pp. 1-16 ◽  
Author(s):  
Alireza Mansouri ◽  
Aria Fallah ◽  
Taufik A. Valiante
Keyword(s):  
Magnetic Resonance ◽  
Temporal Lobe Epilepsy ◽  
Temporal Lobe ◽  
Psychosocial Functioning ◽  
Single Photon ◽  
Selection Process ◽  
Photon Emission ◽  
Emission Computed Tomography ◽  
Resonance Spectroscopy ◽  
Seizure Outcome

Temporal lobe epilepsy (TLE) is the most common form of adult epilepsy that is amenable to surgical treatment. In the carefully selected patient, excellent seizure outcome can be achieved with minimal or no side effects from surgery. This may result in improved psychosocial functioning, achieving higher education, and maintaining or gaining employment. The objective of this paper is to discuss the surgical selection process of a patient with TLE. We define what constitutes a patient that has medically refractory TLE, describe the typical history and physical examination, and distinguish between mesial TLE and neocortical TLE. We then review the role of routine (ambulatory/sleep-deprived electroencephalography (EEG), video EEG, magnetic resonance imaging (MRI), neuropsychological testing, and Wada testing) and ancillary preoperative testing (positron emission tomography, single-photon emission computed tomography (SPECT), subtraction ictal SPECT correlated to MRI (SISCOM), magnetoencephalography, magnetic resonance spectroscopy, and functional MRI) in selecting surgical candidates. We describe the surgical options for resective epilepsy surgery in TLE and its commonly associated risks while highlighting some of the controversies. Lastly, we present teaching cases to illustrate the presurgical workup of patients with medically refractory TLE.

scholarly journals Role of Magnetic Resonance in Understanding the Pathogenesis of Hepatic Encephalopathy

2008 ◽  
Vol 2 ◽  
pp. MRI.S973 ◽  
Author(s):  
A. Huda ◽  
R.K. Gupta ◽  
N. Rajakumar ◽  
M.A. Thomas
Keyword(s):  
Hepatic Encephalopathy ◽  
Magnetic Resonance ◽  
Diffusion Tensor ◽  
Single Photon ◽  
Imaging Techniques ◽  
Photon Emission ◽  
Short Review ◽  
Current Status ◽  
Emission Computed Tomography ◽  
Positron Emission

A spectrum of neuropsychiatric abnormalities caused by portosystemic venous shunting occurs in hepatic encephalopathy (HE) patients with or without liver dysfunction. It is not completely clear how the astrocyte swelling leads to glial-neuronal dysfunction, and how the symptoms are manifested in HE. A major goal of this work is to review the current status of information available from the existing magnetic resonance (MR) modalities including MR imaging (MRI) and MR Spectroscopy (MRS) as well as other modalities in the understanding the pathogenesis of HE. First, we discuss briefly neuron-histopathology, neurotoxins, neuropsychological and neurophysiological tests. A short review on the progress with single-photon emission computed tomography (SPECT) and positron emission tomography (PET) is then presented. In the remaining part of the manuscript, the following topics pertinent to understanding the pathogenesis of HE are discussed: MRI, diffusion tensor imaging (DTI), one-dimensional MRS based single- and multi-voxel based spectroscopic imaging techniques and two-dimensional MRS.

scholarly journals MODERN METHODS OF DIAGNOSTIC IMAGING OF GLIOMAS

2019 ◽  
pp. 15-23
Author(s):  
N. A. Kostenikov ◽  
A. V. Pozdnyakov ◽  
V. F. Dubrovskaya ◽  
O. Yu. Mirolyubova ◽  
Yu. R. Ilyushchenko ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Magnetic Resonance ◽  
Diagnostic Imaging ◽  
Single Photon ◽  
Malignant Tumors ◽  
Photon Emission ◽  
Pathological Process ◽  
Emission Computed Tomography ◽  
Resonance Spectroscopy ◽  
Positron Emission

The review presents an analysis of the literature on the diagnosis of gliomas and the study of their structural and biological features based on implementation of new techniques in clinical practice of diagnostic imaging. These techniques include perfusion technologies for multislice spiral computed tomography (MSCT), magnetic resonance imaging (MRI), functional MRI, proton magnetic resonance spectroscopy (MRS), single photon emission computed tomography (SPECT), and positron emission tomography (PET) with various radiopharmaceuticals (RPHs), first and foremost, labeled amino acids, such as11C-L-methionine and18F-Fluoroethyltyrosine. There is presented that with the application of these two methods (MRI and PET), the most important biochemical processes underlying oncogenesis of malignant tumors might be studied by non-invasive way. The obtained data can be crucial for an early detection of tumor lesions, staging the pathological process, rationale for therapeutic tactics, personalization of treatment, evaluation of the efficiency of therapy at early stages and prognosis of the disease result.

scholarly journals Insight into the Molecular Imaging of Alzheimer’s Disease

2016 ◽  
Vol 2016 ◽  
pp. 1-17 ◽  
Author(s):  
Abishek Arora ◽  
Neeta Bhagat
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Magnetic Resonance ◽  
Single Photon ◽  
Photon Emission ◽  
Postmortem Brain ◽  
Imaging Biomarkers ◽  
Emission Computed Tomography ◽  
Resonance Spectroscopy ◽  
Early Detection Of Disease

Alzheimer’s disease is a complex neurodegenerative disease affecting millions of individuals worldwide. Earlier it was diagnosed only via clinical assessments and confirmed by postmortem brain histopathology. The development of validated biomarkers for Alzheimer’s disease has given impetus to improve diagnostics and accelerate the development of new therapies. Functional imaging like positron emission tomography (PET), single photon emission computed tomography (SPECT), functional magnetic resonance imaging (fMRI), and proton magnetic resonance spectroscopy provides a means of detecting and characterising the regional changes in brain blood flow, metabolism, and receptor binding sites that are associated with Alzheimer’s disease. Multimodal neuroimaging techniques have indicated changes in brain structure and metabolic activity, and an array of neurochemical variations that are associated with neurodegenerative diseases. Radiotracer-based PET and SPECT potentially provide sensitive, accurate methods for the early detection of disease. This paper presents a review of neuroimaging modalities like PET, SPECT, and selected imaging biomarkers/tracers used for the early diagnosis of AD. Neuroimaging with such biomarkers and tracers could achieve a much higher diagnostic accuracy for AD and related disorders in the future.

Clinical Characteristics and Neuroimaging Findings in Internal Jugular Venous Outflow Disturbance

2019 ◽  
Vol 119 (02) ◽  
pp. 308-318 ◽  
Author(s):  
Da Zhou ◽  
Jiayue Ding ◽  
Karam Asmaro ◽  
Liqun Pan ◽  
Jingyuan Ya ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Magnetic Resonance ◽  
Cerebral Perfusion ◽  
Clinical Symptoms ◽  
Single Photon ◽  
Photon Emission ◽  
Clinical Manifestations ◽  
Glucose Consumption ◽  
Emission Computed Tomography ◽  
Subjective Memory

AbstractRecently, internal jugular vein stenosis (IJVS) is gaining increasing attention from clinical researchers due to a series of confounding symptoms that impair the quality of life in affected individuals but cannot be explained by other well-established causes. In this study, we aimed to elucidate the clinical features, neuroimaging characteristics and pathogenesis of IJVS, and explore their possible correlations, in attempt to provide useful clues for clinical diagnosis and treatment. Forty-three eligible patients with unilateral or bilateral IJVS confirmed by contrast-enhanced magnetic resonance venography of the brain and neck were enrolled in this study. Magnetic resonance imaging along with magnetic resonance angiography or computed tomography angiography was applied to identify the radiological pattern of parenchymal or arterial lesions. Cerebral perfusion and metabolism were evaluated by single-photon emission computed tomography (SPECT). Of the 43 patients (46.0 ± 16.0 years old; 30 female), 14 (32.6%) had bilateral and 29 had unilateral IJVS. The common clinical symptoms at admission were tinnitus (60.5%), tinnitus cerebri (67.6%), headache (48.8%), dizziness (32.6%), visual disorders (39.5%), hearing impairment (39.5%), neck discomfort (39.5%), sleep disturbance (60.5%), anxiety or depression (37.5%) and subjective memory decline (30.2%). The presence of bilateral demyelination changes with cloudy-like appearance in the periventricular area and/or centrum semiovale was found in 95.3% (41/43) patients. SPECT findings showed that 92.3% (24/26) patients displayed cerebral perfusion and metabolism mismatch, depicted by bilaterally and symmetrically reduced cerebral perfusion and increased cerebral glucose consumption. IJVS may contribute to alterations in cerebral blood flow and metabolism, as well as white matter lesion formation, all of which may account for its clinical manifestations.

scholarly journals Biomarkers in development of psychotropic drugs

2011 ◽  
Vol 13 (2) ◽  
pp. 225-234 ◽  
Keyword(s):  
Computed Tomography ◽  
Magnetic Resonance ◽  
Clinical Course ◽  
Single Photon ◽  
Imaging Techniques ◽  
Photon Emission ◽  
Cranial Computed Tomography ◽  
Emission Computed Tomography ◽  
Resonance Spectroscopy ◽  
Onset Of Action

Biomarkers have been receiving increasing attention, especially in the field of psychiatry In contrast to the availability of potent therapeutic tools including pharmacotherapy, psychotherapy, and biological therapies, unmet needs remain in terms of onset of action, stability of response, and further improvement of the clinical course. Biomarkers are objectively measured characteristics which serve as indicators of the causes of illnesses, their clinical course, and modification by treatment. There exist a variety of markers: laboratory markers which comprise the determination of genetic and epigenetic markers, neurotransmitters, hormones, cytokines, neuropeptides, enzymes, and others as single measures; electrophysiological markers which usually comprise electroencephalography (EEG) measures, and in particular sleep EEG and evoked potentials, magnetic encephalography, electrocardiogram, facial electromyography, skin conductance, and others; brain imaging techniques such as cranial computed tomography, magnetic resonance imaging, functional MRI, magnetic resonance spectroscopy, positron emission tomography, and single photon emission computed tomography; and behavioral approaches such as cue exposure and challenge tests which can be used to induce especially emotional processes in anxiety and depression. Examples for each of these domains are provided in this review. With a view to developing more individually tailored therapeutic strategies, the characterization of patients and the courses of different types of treatment will become even more important in the future.

scholarly journals Neuroimaging techniques for diagnosing Alzheimer’s disease and cerebrovascular diseases with cognitive impairment

2019 ◽  
Vol 11 (3S) ◽  
pp. 18-25 ◽  
Author(s):  
I. V. Litvinenko ◽  
A. Yu. Emelin ◽  
V. Yu. Lobzin ◽  
K. A. Kolmakova
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Cognitive Impairment ◽  
Magnetic Resonance ◽  
Rating Scales ◽  
Single Photon ◽  
Photon Emission ◽  
Emission Computed Tomography ◽  
Resonance Spectroscopy ◽  
Neuroimaging Techniques

The paper provides data on current neuroimaging techniques for diagnosing Alzheimer’s disease and vascular cognitive impairment (CN). Structural neuroimaging methods can identify potentially treatable diseases leading to dementia and assess the magnitude and localization of atrophic and cerebrovascular changes in brain tissue. Particular attention is paid to the specific signs of Alzheimer’s disease: to the visual assessment of sections and the use of various rating scales (GCA, MTA, Koedam). Vascular changes that are most significant for the development of CI are considered. A new approach to diagnosing CI is presented, by taking into account the biomarkers of amyloidosis, tauopathy, neurodegeneration, and cerebrovascular damage. The results of the authors’ own investigations using positron emission tomography, single photon emission computed tomography, magnetic resonance spectroscopy, and functional magnetic resonance imaging at rest allow these techniques to be recommended for the early diagnosis of CI of different genesis.

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