منابع مشابه
Computerized Tomography
Tomography refers to the synthesis of sectional images or slices from external measurements of a spatially varying function. Line integrals are the most common external measures, which are also known as projections. Availability of multiple projections at diierent orientations allows accurate recovery of the originating function. Because practical implementation of tomography typically requires...
متن کاملComputerized Ionospheric Tomography
ith the transition to the Global Positioning System, Transit has been decommissioned, after having served well for the Fleet. A new system, the Navy Ionospheric Monitoring System, was established using Transit satellites. This article examines the application of the new system to the field of computerized ionospheric tomography. (
متن کاملLocalized wavelet based computerized tomography
We develop an algorithm to reconstruct the wavelet coee-cients of an image from the Radon transform data. The proposed method uses the properties of wavelets to localize the Radon transform and can be used to reconstruct a local region of the cross section of a body, using almost completely local data which signiicantly reduces the amount of exposure and computations in X-ray tomography. For ex...
متن کاملComparison between Needle Biopsy under Guide of Conventional Computerized Tomography (CCT) and Fluoroscopic Computerized Tomography (FCT) in Abdominal, Mediastinal, Lung, Pelvic, Bone, and Liver Masses
Background and Objective: Computerized tomography and fluoroscopic computerized tomography are amongst the methods used for guiding needle biopsy processes; however, fluoroscopic computerized tomography demonstrates the images during the process of biopsy. This study aims to compare and contrast the success of biopsy under guide...
متن کاملSpontaneous hemorrhage during cranial computed tomography.
Computed tomographic (CT) scann ing is very accurate in the recog nition of intracerebral hemorrhage. However, when radiographic contrast material has been administered, there may be confus ion between an unsuspected hematoma and an enhancing brain lesion . We recently encountered two cases of spontaneous hemorrhage occurring during the enhancement phase of the CT examination immediately after ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: British Journal of Ophthalmology
سال: 1977
ISSN: 0007-1161
DOI: 10.1136/bjo.61.10.666