نتایج جستجو برای: digital tomography

تعداد نتایج: 486419  

J Porsamimi M Mobini M Tofanghchiha S Kafilzadeh

Background & Aims: The aim of this study was to evaluate the accuracy of Cone-beam Computerized Tomography (CBCT) linear measurements in dry mandibles by comparing them with direct measurements. Methods: Two human dry mandibles were used in this study. Thirteen sites were selected on each mandible. Specimens were scanned by CBCT and linear measurements were made using Planmeca Romexis 2.3.0.R s...

2009
Wolfgang J. Weninger Stefan H. Geyer

The mouse is the most appropriate biomedical model organism for researching the mechanistic function of genetic factors in normal embryogenesis and in the genesis of cardiovascular malformations. Three-dimensional (3D) visualisation of the developing organs of wild type and genetically modified mouse embryos is essential for such research. This paper aims at discussing imaging methods that perm...

Journal: :AJR. American journal of roentgenology 1984
P D Barnes A F Reynolds D C Galloway M Pollay J C Leonard J R Prince

Digital techniques are becoming well established as costeffective for vascular imaging in neuroradiology [1, 2]. Pediatric application of this technology is also under development [3]. Futhermore, there has been increasing use of more efficient, less invasive methods of evaluating pediatric spine problems through newer-generation computed tomography (CT), including scanned-projection radiograph...

2007
Abdelkader Bousselham

The most important aspects of nuclear medicine imaging systems such as Positron Emission Tomography (PET) or Single Photon Emission Computed Tomography (SPECT) are the spatial resolution and the sensitivity (detector efficiency in combination with the geometric efficiency). Considerable efforts have been spent during the last two decades in improving the resolution and efficiency by developing ...

Journal: :iranian endodontic journal 0
yaser safi mohammad mehdi aghdasi fatemeh ezoddini-ardakani samira beiraghi zahra vasegh

introduction: vertical root fracture (vrf) is common in endodontically treated teeth. conventional and digital radiographies have limitations for detection of vrfs. cone-beam computed tomography (cbct) offers greater detection accuracy of vrfs in comparison with conventional radiography. this study compared the effects of metal artifacts on detection of vrfs by using two cbct systems. methods a...

Background and purpose: Perforation impairs the prognosis of endodontic treatments, so, timely and accurate diagnosis is important. For this purpose, various radiographic diagnostic tools have been studied to select the method that has the least complications and helps in making the most accurate diagnosis. This study aimed to compare the accuracy of cone beam computed tomography (CBCT) and int...

2013
Yair Rivenson Adrian Stern Joseph Rosen

We report a closed analytical expression formulating the reconstruction guarantees for performing object tomography of a 3D object from its 2D recorded hologram. OCIS codes: (090.1995) Digital holography; (070.0070) Fourier optics and signal processing; (100.3190) Inverse problems; (110.1758) Computational imaging

2006
Tomasz Koszmider Krzysztof Strzecha

New 3D medical images reconstruction algorithm is presented in this paper. It concerns utilization of digital processing and analysis of Computed Tomography images in process of 3D lungs reconstruction.

Journal: :Radiology 1982
S J Dwyer A W Templeton N L Martin K R Lee E Levine S Batnitzky S J Rosenthal D F Preston H I Price S Faszold W H Anderson L T Cook

A study of the cost of recording and archiving digitally formatted diagnostic images is presented for an academic radiology department serving a 614-bed university hospital and a large outpatient population. The radiological examinations include computed tomography, nuclear medicine, ultrasound, and digital radiography. The archiving management strategies studied include the combined use of com...

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