scholarly journals POSSIBILITIES OF MODERN IMAGING TECHNIQUES IN DIAGNOSTICS OF OPTIC NERVE DRUSEN (LITERATURE REVIEW)

2016 ◽  
Vol 1 (6) ◽  
pp. 206-209
Author(s):  
Кабанова ◽  
Evgeniya Kabanova ◽  
Иойлева ◽  
Elena Ioyleva ◽  
Котова ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Optic Nerve ◽  
Visual Analysis ◽  
Imaging Techniques ◽  
Diagnostic Techniques ◽  
Resonance Imaging ◽  
Diagnostic Standards ◽  
The Brain ◽  
Optic Nerve Drusen

With the introduction and development of new diagnostic techniques, the relevance of drusen of the optic nerve di-agnostics is increasing. Existing imaging techniques alone or in their various combinations cannot allow to confirm optic nerve drusen in all clinical cases. The diagnosis of optic nerve drusen causes some difficulties because of absence of clear diagnostic standards and classification. Since the advent of new ophthalmological methods of structural and topographic visual analysis evaluation, such as spectral-domain optical coherence tomography, Heidelberg retina tomography, videooculography, B-scan ultrasonography of the orbits and optic nerve, fluorescent angiography of the retina, computed tomography and magnetic resonance imaging of the brain and orbits, the diagnostics of optic nerve drusen becomes more informative. In this article we review the main current imaging techniques in the diagnostics of the optic nerve drusen.

scholarly journals Cross-sectional anatomy, computed tomography, and magnetic resonance imaging of the banded houndshark (Triakis scyllium)

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Sang Wha Kim ◽  
Adams Hei Long Yuen ◽  
Cherry Tsz Ching Poon ◽  
Joon Oh Hwang ◽  
Chang Jun Lee ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Soft Tissues ◽  
Imaging Techniques ◽  
Evolutionary Developmental Biology ◽  
Phylogenetic Position ◽  
Ct Scanner ◽  
Resonance Imaging ◽  
Cross Sectional

AbstractDue to their important phylogenetic position among extant vertebrates, sharks are an invaluable group in evolutionary developmental biology studies. A thorough understanding of shark anatomy is essential to facilitate these studies and documentation of this iconic taxon. With the increasing availability of cross-sectional imaging techniques, the complicated anatomy of both cartilaginous and soft tissues can be analyzed non-invasively, quickly, and accurately. The aim of this study is to provide a detailed anatomical description of the normal banded houndshark (Triakis scyllium) using computed tomography (CT) and magnetic resonance imaging (MRI) along with cryosection images. Three banded houndsharks were scanned using a 64-detector row spiral CT scanner and a 3 T MRI scanner. All images were digitally stored and assessed using open-source Digital Imaging and Communications in Medicine viewer software in the transverse, sagittal, and dorsal dimensions. The banded houndshark cadavers were then cryosectioned at approximately 1-cm intervals. Corresponding transverse cryosection images were chosen to identify the best anatomical correlations for transverse CT and MRI images. The resulting images provided excellent detail of the major anatomical structures of the banded houndshark. The illustrations in the present study could be considered as a useful reference for interpretation of normal and pathological imaging studies of sharks.

Diagnostic Imaging Techniques

2017 ◽  
Author(s):  
Gerald W. Staton Jr ◽  
Phuong-Anh T. Duong
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Diagnostic Imaging ◽  
Imaging Techniques ◽  
Photon Emission ◽  
Chest Radiographs ◽  
Medical Community ◽  
Multidetector Row Computed Tomography ◽  
Resonance Imaging

Chest imaging techniques are evolving with recent advances in computed tomography, magnetic resonance imaging, and ultrasonography. While conventional radiography remains an important screening tool because of its low relative cost, ease of acquisition, general availability, and familiarity, physicians must understand all techniques so as to provide patients with the most appropriate diagnostic imaging. Consultation with radiologists, use of online clinical decision support, and adherence to national guidelines such as the American College of Radiology Appropriateness Criteria®, can help clinicians make imaging decisions, especially in light of medical imaging risks that are of concern in the medical community and the general population. Choosing appropriate imaging, including whether or not to image, requires careful consideration. This review contains 6 figures, 3 tables, and 6 references. Key Words: Chest Radiographs, Dual-Energy Chest Radiographs, Computed Tomography, High-Resolution Chest Computed Tomography, Multidetector Row Computed Tomography, Computed Tomographic Angiography for Pulmonary Embolism, Magnetic Resonance Imaging, Single-Photon Emission Tomography (SPECT), Ultrasonography 

Thumb Injuries and Instabilities. Part 1: Anatomy, Kinesiology, and Imaging Techniques of the Thumb

2021 ◽  
Vol 25 (02) ◽  
pp. 346-354
Author(s):  
Alain G. Blum ◽  
Marnix T. van Holsbeeck ◽  
Stefano Bianchi
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Diagnostic Accuracy ◽  
Motor Function ◽  
Crucial Role ◽  
Imaging Techniques ◽  
Resonance Imaging ◽  
Pathologic Lesions ◽  
Essential Function

AbstractThe unique anatomical characteristics of the thumb offer a broad range of motion and the ability to oppose thumb and finger, an essential function for grasping. The motor function of the thumb and its orientation make it particularly vulnerable to trauma. Pathologic lesions encountered in this joint are varied, and imaging techniques play a crucial role in injury detection and characterization. Despite advances in diagnostic accuracy, acute thumb injuries pose a challenge for the radiologist. The complex and delicate anatomy requires meticulous and technically flawless image acquisition. Standard radiography and ultrasonography are currently the most frequently used imaging techniques. Computed tomography is most often indicated for complex fractures and dislocations, and magnetic resonance imaging may be useful in equivocal cases. In this article, we present the relevant anatomy and imaging techniques of the thumb.

Basics of Imaging Techniques in Evaluation of Soft Tissue Tumors

2017 ◽  
Author(s):  
Emily Alanna Aherne ◽  
Sinchun Hwang
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Positron Emission Tomography ◽  
Magnetic Resonance ◽  
Soft Tissue ◽  
Imaging Techniques ◽  
Soft Tissue Tumors ◽  
Emission Tomography ◽  
Resonance Imaging ◽  
Positron Emission

Medical imaging plays a pivotal role in the detection, diagnosis, and clinical management of primary soft tissue tumors. Various imaging modalities have been used, and each modality offers unique advantages in the workup of soft tissue tumors by localizing the lesions in different compartments of the body and characterizing macroscopic tissue composition of the lesions in a noninvasive and safe manner. We review the clinical role and technical aspects of the frequently used imaging modalities, including magnetic resonance imaging (MRI), computed tomography, ultrasonography, positron emission tomography, and plain radiography with an emphasis on MRI as a mainstay imaging modality and a brief discussion of advanced techniques. We also review imaging features of common soft tissue tumors that can be detected and characterized using current imaging techniques. This review contains 54 figures, 1 table and 37 references.   Key words: computed tomography, diffusion-weighted imaging, imaging, magnetic resonance imaging, positron emission tomography, soft tissue, technique, tumor, ultrasonography

scholarly journals Agreement Between Computed Tomography And Magnetic Resonance Imaging In Measuring Optic Nerve Sheath Diameter

2018 ◽  
Vol 10 (3) ◽  
pp. 22
Author(s):  
Haider N. Al-Tameemi ◽  
Neda M. Helel
Keyword(s):  
Magnetic Resonance Imaging ◽  
Optic Nerve ◽  
Magnetic Resonance ◽  
Ct Scan ◽  
Optic Nerve Sheath Diameter ◽  
Resonance Imaging ◽  
Perfect Agreement ◽  
Nerve Sheath ◽  
The Brain ◽  
Ct And Mri

BACKGROUND: Neuroimaging is increasingly used as a non-invasive method to assess raised intracranial pressure (ICP). Optic nerve sheath diameter (ONSD) measurement using brain magnetic resonance imaging (MRI) has been shown to correlate well with invasively measured ICP, however little research has been conducted on the ONSD measurement using computerized tomography (CT) in correlation with ICP. This study was done to investigate whether CT scan can reliably replace MRI in measuring ONSD.METHOD: A cross-sectional comparative study was conducted on 50 adult patients (29 females and 21 males), who underwent both CT and MRI of the brain along 10-month period. Using the brain axial section, the transverse ONSD was measured at 3 mm behind the globe in both modalities. Agreement between CT and MRI readings was assessed using intraclass correlation (ICC) and Kappa method.RESULTS: There was a strongly positive and statistically significant correlation between ONSD measurement using CT scan and MRI (p value <0.001). There was almost perfect agreement between CT scan and MRI in measuring ONSD (ICC=0.987 and Kappa =0.837). Similar agreement was obtained when cases stratified into normal (≤ 5mm) and thickened (> 5mm) ONSD (ICC=0.947 and 0.972 respectively).CONCLUSION: CT scan is a reliable substitute for MRI in measuring ONSD with almost perfect agreement between the two modalities. It might be good practice to include ONSD measurement in the initial evaluation of brain CT scan in any patient with suspected raised ICP.

Imaging in stroke

2017 ◽  
Author(s):  
Hugh Markus ◽  
Anthony Pereira ◽  
Geoffrey Cloud
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Imaging Techniques ◽  
Haemorrhagic Stroke ◽  
Stroke Care ◽  
Resonance Imaging ◽  
Rule Out

Imaging plays a key role in the investigation in stroke, both to confirm the diagnosis and rule out other causes, and also to determine the underlying aetiology. This chapter covers the different imaging techniques which are commonly used in stroke care. It discusses the use of computed tomography and magnetic resonance imaging in diagnosis of both ischaemic and haemorrhagic stroke. It also covers the various angiographic imaging techniques that can be used to identify the presence of extra- and intracranial stenoses.

scholarly journals Comparison of Diagnostic Medical Sonography, Computed Tomography, Magnetic Resonance Imaging, and Contrast-Enhanced Ultrasound in the Investigation of Renal Lesions

2019 ◽  
Vol 36 (1) ◽  
pp. 37-44
Author(s):  
Jessica T. Prince
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Imaging Techniques ◽  
Imaging Modalities ◽  
Contrast Enhanced Ultrasound ◽  
Resonance Imaging ◽  
Renal Masses ◽  
Renal Lesions ◽  
Contrast Enhanced

This review explores the classification and evaluation of suspicious renal lesions across several radiologic imaging modalities. Diagnostic medical sonography (DMS), computed tomography (CT), magnetic resonance imaging (MRI), and contrast-enhanced ultrasound (CEUS) are the primary modalities used to investigate questionable lesions found within the kidneys. Renal masses may range from completely benign to malignant. They are classified based on many different features and characteristics. These lesions may be simple cystic, complex cystic, or solid in nature. Masses may also exhibit varying degrees of vascularity, septations, and calcifications. The discussed imaging modalities have varying strengths, limitations, and implications for use. Imaging techniques may be used independently or in conjunction to best diagnose and treat a patient with a suspicious renal mass. The aim of this review was to describe the diagnostic value of the imaging modalities (DMS, CT, MRI, and CEUS) and their role in the evaluation of suspicious renal lesions.

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