نتایج جستجو برای: ray computed tomography ct
تعداد نتایج: 561723 فیلتر نتایج به سال:
We describe a new approach to detect the ssures between the lobes of the lungs in computed tomography (CT) scans. We focus on the detection of the major ssures in diagnostic CT. Our approach is to rst nd a region containing the ssure and then extract the ssure within this region by analyzing local features. We developed a \marching-bar method" to segment the region containing the ssure. After t...
Percutaneous preoperative localisation of breast tumours using a hook-wire needle is a standard radiological practice. The use of a hook-wire in preoperative localisation of pulmonary nodules under computed tomography guidance has also been described in overseas publications. We describe herein our local experience with the use of a hook-wire needle that is primarily used in breast tumours in p...
A variation on the standard time domain optical coherence tomography (TDOCT) system is presented. Using an inexpensive piezoelectric stack to modulate the reference mirror position, the amplitude and phase of the sample reflection is determined without scanning. With the primary scan in the transverse direction, en face and B-scan OCT images can be readily produced with phase information. This ...
Since its introduction in the early 1970s, computed tomography (CT) has undergone tremendous improvements in terms of technology, performance and clinical applications. Based on the historic evolution of CT and basic CT physics, this chapter describes the status quo of the technology and tries to anticipate future developments. Besides the description of key components of CT systems, a special ...
Introduction: The diagnosis of tuberculous peritonitis is still challenging and very important. Early and accurate diagnosis leads to an effective therapy and good survival rates. With the widespread use of computed tomography (CT) in the abdomen, it is important to be familiar with the spectrum of CT appearances seen in tuberculous peritonitis. Our retrospective study aims to describe the comm...
1 Background: We sought to evaluate a new regional segmentation method for use with 2
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