scholarly journals Ultrasonic Tomographic Technique and Its Applications

2019 ◽  
Vol 9 (5) ◽  
pp. 1005 ◽  
Author(s):  
Takashi Takiguchi
Keyword(s):  
Optical Tomography ◽  
Acoustic Tomography ◽  
Ultrasonic Tomography ◽  
X Rays ◽  
Resonance Imaging ◽  
X Ray ◽  
Non Invasive ◽  
Tomographic Technique ◽  
Magnetic Resonance Imaging Mri ◽  
Non Destructive

X-ray tomography and magnetic resonance imaging (MRI) are excellent techniques for non-destructive or non-invasive inspections, however, they have shotcomings including the expensive cost in both the devices themselves and their protection facilities, the harmful side effects of the X-rays to human bodies and to the environment. In view of this argument, it is necessary to develop new, inexpensive, safe and reliable tomographic techniques, especially in medical imaging and non-destructive inspections. There are new tomographic techniques under development such as optical tomography, photo-acoustic tomography, ultrasonic tomography and so on, from which we take ultrasonic tomography as the topic in this paper. We introduce a review of the known ultrasonic tomographic techniques and discuss their future development.

scholarly journals Illuminating the Brain With X-Rays: Contributions and Future Perspectives of High-Resolution Microtomography to Neuroscience

2021 ◽  
Vol 15 ◽  
Author(s):  
Paulla Vieira Rodrigues ◽  
Katiane Tostes ◽  
Beatriz Pelegrini Bosque ◽  
João Vitor Pereira de Godoy ◽  
Dionisio Pedro Amorim Neto ◽  
...  
Keyword(s):  
Imaging Techniques ◽  
Three Dimensional ◽  
X Rays ◽  
Future Perspectives ◽  
Resonance Imaging ◽  
X Ray ◽  
Cellular Resolution ◽  
Magnetic Resonance Imaging Mri ◽  
Non Destructive ◽  
The Brain

The assessment of three-dimensional (3D) brain cytoarchitecture at a cellular resolution remains a great challenge in the field of neuroscience and constant development of imaging techniques has become crucial, particularly when it comes to offering direct and clear obtention of data from macro to nano scales. Magnetic resonance imaging (MRI) and electron or optical microscopy, although valuable, still face some issues such as the lack of contrast and extensive sample preparation protocols. In this context, x-ray microtomography (μCT) has become a promising non-destructive tool for imaging a broad range of samples, from dense materials to soft biological specimens. It is a new supplemental method to be explored for deciphering the cytoarchitecture and connectivity of the brain. This review aims to bring together published works using x-ray μCT in neurobiology in order to discuss the achievements made so far and the future of this technique for neuroscience.

A Review of Process Tomography Application in Inspection System

2014 ◽  
Vol 70 (3) ◽  
Author(s):  
Yasmin Abdul Wahab ◽  
Ruzairi Abdul Rahim ◽  
Mohd Hafiz Fazlul Rahiman ◽  
Herlina Abdul Rahim ◽  
Suzanna Ridzuan Aw ◽  
...  
Keyword(s):  
Electrical Impedance ◽  
Optical Tomography ◽  
Good Condition ◽  
Future Research ◽  
Inspection System ◽  
Ultrasonic Tomography ◽  
Impedance Tomography ◽  
X Ray ◽  
Process Tomography ◽  
Non Destructive

The inspection system is crucial to ensure the system is always in a good condition. A technique that can be used for inspection system is process tomography. By promising non-destructive approach; various types of process tomography applied in civil, manufacturing and electrical applications. The purpose of this paper is to review the types of process tomography such as ultrasonic tomography, x-ray tomography, optical tomography, electrical resistance tomography, and electrical impedance tomography that had been applied to the inspection system. Variety techniques of inspection based on those sensors briefly discussed in this paper. The result showed that the process tomography expanded tremendously in the inspection system. Finally, a potential future research on the inspection system in the civil application proposed in this paper.

Complete Palmar Dislocation of the Lunate in Rheumatoid Arthritis

1996 ◽  
Vol 21 (3) ◽  
pp. 384-387 ◽  
Author(s):  
M. ARNER ◽  
K. JONSSON ◽  
P. ASPENBERG
Keyword(s):  
Bone Structure ◽  
Bone Cells ◽  
X Rays ◽  
Resonance Imaging ◽  
Rheumatoid Patient ◽  
X Ray ◽  
Normal Bone ◽  
Cellular Events ◽  
Magnetic Resonance Imaging Mri ◽  
Mri Changes

We report a case of complete palmar dislocation of the lunate in a rheumatoid patient. X-rays showed a normal bone structure of the lunate without sclerosis or collapse and on MRI an almost normal signal intensity was found. The lunate was removed. Histological examination showed complete necrosis of both marrow and bone cells, and tetracycline labelling showed no fluorescence. This case illustrates that neither X-ray nor magnetic resonance imaging (MRI) can detect complete bone necrosis. When X-ray or MRI changes do occur, these are indications of cellular events following some degree of spontaneous revascularization.

Cervical X-Rays and the Atlanto-Axial Region; Supplementary Computed Tomography may be Required in Trauma

2000 ◽  
Vol 45 (5) ◽  
pp. 151-151
Author(s):  
D. Choi
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
X Rays ◽  
Mechanism Of Injury ◽  
Resonance Imaging ◽  
Axial Region ◽  
Cervical Trauma ◽  
X Ray ◽  
Magnetic Resonance Imaging Mri ◽  
Symptoms And Signs

In cervical trauma, x-rays may require supplementation with dynamic x-rays, computed-tomography (CT), or magnetic resonance imaging (MRI). A normal cervical x-ray does not always imply cervical stability. The mechanism of injury, symptoms and signs help to indicate whether further imaging is required. We report a patient with a fracture of the atlas that was not diagnosed by plain radiology, but seen on CT.

scholarly journals Non-invasive diagnostics in fossils - Magnetic Resonance Imaging of pathological belemnites

2005 ◽  
Vol 2 (2) ◽  
pp. 133-140 ◽  
Author(s):  
D. Mietchen ◽  
H. Keupp ◽  
B. Manz ◽  
F. Volke
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Soft Tissue ◽  
Clinical Diagnostics ◽  
Resonance Imaging ◽  
Non Invasive ◽  
Physiological Processes ◽  
Magnetic Resonance Imaging Mri ◽  
Invasive Diagnostics

Abstract. For more than a decade, Magnetic Resonance Imaging (MRI) has been routinely employed in clinical diagnostics because it allows non-invasive studies of anatomical structures and physiological processes in vivo and to differentiate between healthy and pathological states, particularly of soft tissue. Here, we demonstrate that MRI can likewise be applied to fossilized biological samples and help in elucidating paleopathological and paleoecological questions: Five anomalous guards of Jurassic and Cretaceous belemnites are presented along with putative paleopathological diagnoses directly derived from 3D MR images with microscopic resolution. Syn vivo deformities of both the mineralized internal rostrum and the surrounding former soft tissue can be traced back in part to traumatic events of predator-prey-interactions, and partly to parasitism. Besides, evidence is presented that the frequently observed anomalous apical collar might be indicative of an inflammatory disease. These findings highlight the potential of Magnetic Resonance techniques for further paleontological applications.

scholarly journals More than XRF Mapping: STEAM (Statistically Tailored Elemental Angle Mapper) a Pioneering Analysis Protocol for Pigment Studies

2021 ◽  
Vol 11 (4) ◽  
pp. 1446
Author(s):  
Jacopo Orsilli ◽  
Anna Galli ◽  
Letizia Bonizzoni ◽  
Michele Caccia
Keyword(s):  
Cultural Heritage ◽  
Element Distribution ◽  
Elemental Distribution ◽  
X Rays ◽  
Spectral Angle Mapper ◽  
X Ray ◽  
Fluorescence Radiation ◽  
Set Up ◽  
Non Destructive ◽  
Analysis Protocol

Among the possible variants of X-Ray Fluorescence (XRF), applications exploiting scanning Macro-XRF (MA-XRF) are lately widespread as they allow the visualization of the element distribution maintaining a non-destructive approach. The surface is scanned with a focused or collimated X-ray beam of millimeters or less: analyzing the emitted fluorescence radiation, also elements present below the surface contribute to the elemental distribution image obtained, due to the penetrative nature of X-rays. The importance of this method in the investigation of historical paintings is so obvious—as the elemental distribution obtained can reveal hidden sub-surface layers, including changes made by the artist, or restorations, without any damage to the object—that recently specific international conferences have been held. The present paper summarizes the advantages and limitations of using MA-XRF considering it as an imaging technique, in synergy with other hyperspectral methods, or combining it with spot investigations. The most recent applications in the cultural Heritage field are taken into account, demonstrating how obtained 2D-XRF maps can be of great help in the diagnostic applied on Cultural Heritage materials. Moreover, a pioneering analysis protocol based on the Spectral Angle Mapper (SAM) algorithm is presented, unifying the MA-XRF standard approach with punctual XRF, exploiting information from the mapped area as a database to extend the comprehension to data outside the scanned region, and working independently from the acquisition set-up. Experimental application on some reference pigment layers and a painting by Giotto are presented as validation of the proposed method.

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