نتایج جستجو برای: spiral ct scan

تعداد نتایج: 200166  

Journal: :Journal of neurology, neurosurgery, and psychiatry 1985
P K Sethi B R Kumar V S Madan V Mohan

A group of patients presenting with seizures (focal or generalised) and abnormal CT scans who, on follow up, showed complete resolution of the CT scan changes, without any treatment other than anticonvulsants, are described.

Journal: :Medical image computing and computer-assisted intervention : MICCAI ... International Conference on Medical Image Computing and Computer-Assisted Intervention 2007
Xiangwei Zhang Jonathan Stoeckel Matthias Wolf Pascal Cathier Geoffrey McLennan Eric A. Hoffman Milan Sonka

A novel method called local shape controlled voting has been developed for spherical object detection in 3D voxel images. By introducing local shape properties into the voting procedure of normal overlap, the proposed method improves the capability of differentiating spherical objects from other structures, as the normal overlap technique only measures the 'density' of normal overlapping, while...

2007
Muhammad Muddassir Malik Christoph Heinzl Eduard Gröller

This paper proposes a novel technique for the direct comparison of a surface model with the corresponding industrial CT volume. We do not require the generation of a mesh from the CT scan and instead perform comparison directly with the raw volume dataset. Our technique uses the information from the surface model to locate corresponding points in the CT dataset. We then compute various comparis...

Journal: :Comput. Graph. Forum 2010
Sylvia Glaßer Steffen Oeltze-Jafra Anja Hennemuth Christoph Kubisch Andreas H. Mahnken Skadi Wilhelmsen Bernhard Preim

Cardiovascular imaging with current multislice spiral computed tomography (MSCT) technology enables a noninvasive evaluation of the coronary arteries. Contrast-enhanced MSCT angiography with high spatial resolution allows for a segmentation of the coronary artery tree. We present an automatically adapted transfer function (TF) specification to highlight pathologic changes of the vessel wall bas...

M Vatanpoor, SH Assareh, Z KHalilak, Z Movasagh,

Background and Aim: The purpose of this study was to evaluate residual dentin thickness of the root and the area of the canal lumen in the coronal region of the mesiobuccal and mesiolingual canals of the lower first molars after canal preparation with the common method of using hand files and Gates Glidden drills or ProTaper rotary files, by Spiral Ct-Scan. Materials and Methods: In this exp...

2015
Holger Wenz Máté E. Maros Mathias Meyer Alex Förster Holger Haubenreisser Stefan Kurth Stefan O. Schoenberg Thomas Flohr Christianne Leidecker Christoph Groden Johann Scharf Thomas Henzler Qinghui Zhang

OBJECTIVES To prospectively intra-individually compare image quality of a 3rd generation Dual-Source-CT (DSCT) spiral cranial CT (cCT) to a sequential 4-slice Multi-Slice-CT (MSCT) while maintaining identical intra-individual radiation dose levels. METHODS 35 patients, who had a non-contrast enhanced sequential cCT examination on a 4-slice MDCT within the past 12 months, underwent a spiral cC...

Journal: :iranian journal of medical physics 0
seied rabi mahdavi medical physics department, faculty of medicine, tehran university of medical sciences, tehran, iran.

introduction bolus is a soft and resilient material which is used for increasing skin dose or to even out the irregular patient contour. the main property of various materials used presently as bolus is the water-equivalent electron density. ethyl methacrylate is used as a soft-liner in dentistry and its physical and chemical properties are proved to be nontoxic for human body. the goal of this...

Journal: :acta medica iranica 0
ebrahim razmpa department of otolaryngology, tehran university of medical sciences, tehran, iran. babak saedi department of otolaryngology, tehran university of medical sciences, tehran, iran. amin dostee department of otolaryngology, tehran university of medical sciences, tehran, iran. mohsen ordobadee department of otolaryngology, tehran university of medical sciences, tehran, iran.

chronic rhinosinusitis (crs) is a common disease which is usually diagnosed clinically, considering the combination of natural history, physical examination and imaging studies. this study aimed to evaluate the clinical value of routine postoperative histopathologic examination (pohe) in patients with a clinical diagnosis of chronic rhinosinusitis with polyposis (crswp), or without polyposis (c...

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