Computerized Tomography

Wang, Ge; Vannier, Michael W.

doi:10.1002/047134608x.w4702

Cited by 5 publications

(3 citation statements)

References 43 publications

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“…We also observed some interruptions because of Bbeam hardening^effects (Brook et al 1976;Wang et al 1998) in large bony sections with the photon energy level set to 45 keV. This led us to select 55 keV as the photon energy, where soft tissue was clearly distinguishable from its background and grayscale differences between bone and the surrounding air and soft tissue are sufficiently large.…”

Section: Micro-ct Imagingmentioning

confidence: 90%

Soft Tissue Morphometry of the Malleus–Incus Complex from Micro-CT Imaging

Sim

Puria

2008

JARO

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The malleus-incus complex (MIC) is unique to mammalian hearing. To develop a comprehensive biomechanical MIC model for the human middle ear, measurements regarding its anatomical features are a necessity. Micro-scale X-ray computed tomography (micro-CT) imaging, which is known to be a suitable method for imaging high-density tissue such as middle-ear ossicles and surrounding bones, is used in this study to determine the three-dimensional (3-D) morphometry of the soft tissue attachments of the MIC. The MIC morphometry is based on their 3-D reconstruction from micro-CT image slices with resolutions ranging from 10 to 20 mm. The suspensory ligament and tendon attachments of the malleus and the incus as well as the incudomalleal joint (IMJ), are quantified in terms of dimensions, positions, and orientations for four human cadaver temporal bones. The malleus principal frame, the incus principal frame, and the MIC principle frame are calculated and the morphometry is reported in relation to each of these frames for the first time. The resulting values show significant variation across ear samples, suggesting that models of the MIC should be based on individual anatomy. The IMJ morphometry dimensions appear to be proportional to the ossicular mass. The micro-CT imaging modality is a nondestructive and relatively fast method for obtaining soft tissue morphometry and provides accurate anatomical features in relation to the principal axes of bones.

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Section: Micro-ct Imagingmentioning

confidence: 90%

Soft Tissue Morphometry of the Malleus–Incus Complex from Micro-CT Imaging

Sim

Puria

2008

JARO

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“…Because practical implementation of tomography typically requires large amounts of data and calculations, modern computing technologies are important. [5] The line integrals for a certain angle represent a signature for that angle when its calculated for an object; figure (1), the line integral calculated by using Radon transform formula, which is: [6] g(Ф,s) as a 1-D projection at an angle Ф. g(Ф,s) is the line integral of the image intensity f(x,y), along a line l that is distance s from the origin and at angle Ф off the x-axis. [5] The projection for two distinguished angles can be used as features to calculate the similarity between two objects (images).…”

Section: Radon Projectionsmentioning

confidence: 99%

Satellite Image Mosaics by Using Radon Projections

Abdul Jabar

2022

JWSM

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In this research a new mosaics method to build larg image from different satellite senses by using slide window technique is presented. That depend on using radon projections (line integrals) as features to compare instead of comparing each element in the slide windows. This new method and its faster version proved to be a fast matching method than the regular RMS method; therefore, it can be adopted in the satellite images mosaics to build a complete view from separated views for the same location.

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“…An eventual integration of these 2D maps creates a 3D digital model and this process is known as tomography. 8 The 3D element associated with each pixel are known as voxel and each voxel bears a CT number which corresponds to the appropriate attenuation coefficient. The CT number is commonly expressed as grey values or Hounsfield units (HU).…”

Section: Basics Of Ctmentioning

confidence: 99%

The Biomedical Applications of Computed Tomography

Tuan

Hutmacher

2007

Biomechanical Systems Technology

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Computed Tomography (CT) imaging is playing an increasingly important role in the biomedical sciences of today as clinicians and scientists begin to recognize its potential in health care and research. Clinical CT facilitates the early diagnosis of diseases thus allowing the selection of appropriate therapies which improves the patient's overcome. Pre-surgical imaging aids operation planning while real time scans assist complicated high risk surgeries. One of the primary concerns in clinical CT procedures would be the adverse radiation side effects thus only low dosages are allowed. The resolution of clinical imaging is insufficient for research, hence the micro CT set up has to be used. The advent of micro CT imaging has ushered in the possibility of non destructive quantitative analysis for trabeculae architectures, scaffolds, soft tissues and biological constructs. This paper highlights the inherent potential and emerging biomedical applications of CT. 193 Biomechanical Systems Technology Downloaded from www.worldscientific.com by UNIVERSITY OF QUEENSLAND on 08/15/15. For personal use only.

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Computerized Tomography

Abstract: The sections in this article are CT Principles Image Reconstruction Image Quality Discussion and Further Readings

Cited by 5 publications

References 43 publications

Soft Tissue Morphometry of the Malleus–Incus Complex from Micro-CT Imaging

Soft Tissue Morphometry of the Malleus–Incus Complex from Micro-CT Imaging

Satellite Image Mosaics by Using Radon Projections

The Biomedical Applications of Computed Tomography

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