نتایج جستجو برای: spiral ct

تعداد نتایج: 154953  

Journal: :Chest 2000
D N Rabin S Rabin R A Mintzer

Coronary artery calcification quantification (scoring) has been done with electron beam CT (EBCT), but is now being done with spiral or helical CT. Many radiologists and cardiologists who do not have EBCT but do have access to spiral CT will now be able to do coronary artery calcification scoring, and will now need to know the spiral CT appearance of the coronary artery anatomy. This pictorial ...

2008
J Garvey

The introduction of spiral technology to computed tomography (CT) scanners in the late 1980s has revolutionised the field ofCT. Spiral CT offers definite practical benefits over conventional scanners and has expanded the role of CT through the development of new scanning techniques. CT scanning now rivals magnetic resonance imaging in many areas of investigation, and for some situations is the ...

Journal: :AJNR. American journal of neuroradiology 1994
J N Suojanen S K Mukherji F J Wippold

PURPOSE To compare conventional and spiral CT studies of the larynx. METHODS Ten patients had both conventional and spiral CT studies of the neck using 5-mm section collimation and 5-mm increments. The spiral scans also were reconstructed at 2-mm increments. Five patients had two spiral CT larynx studies with 5-mm and 2-mm collimation. Two observers independently rated the visibility of laryn...

Journal: :The British journal of radiology 2006
J C van Rijn N Klemetso J B Reitsma P M Bossuyt F J Hulsmans W C Peul G J den Heeten J Stam C B L M Majoie

Spiral CT is considered the best alternative for MRI in the evaluation of herniated discs. The purpose of this study was to compare radiological evaluation of spiral CT with MRI in patients suspected of herniated discs. 57 patients with lumbosacral radicular syndrome underwent spiral CT and 1.5 T MRI. Two neuroradiologists independently evaluated 171 intervertebral discs for herniation or "bulg...

Journal: :American Journal of Roentgenology 1993

D. Shahbazi, F. Bouzarjomehri, M. H. Zare,

  ABSTRACT   Background: While the benefits of Computed Tomography (CT) are well known in accurate diagnosis, those benefits are not risk free. CT is a device with higher patient dose in comparison with other conventional radiological procedures. Is the reduction of exposures by requiring optimization of CT procedures [a principle concern in radiological protection]? In this study, the radiatio...

Journal: :Medical physics 1998
M Kachelriess W A Kalender

Subsecond computed tomography (CT) scanning offers potential for improved heart imaging. We therefore developed and validated dedicated reconstruction algorithms for imaging the heart with subsecond spiral CT utilizing electrocardiogram (ECG) information. We modified spiral CT z-interpolation algorithms on a subsecond spiral CT scanner. Two new classes of algorithms were investigated: (a) 180 d...

Journal: :In vivo 2005
Emmanouela Katsouda Kyriaki Mystakidou Aggeliki Rapti Stelios Argentos Nikolaos L Kelekis Renata Mastorakou Ourania Anagnostopoulou Dimitrios A Kelekis

OBJECTIVE To prospectively evaluate the diagnostic accuracy of spiral computed tomography (CT) versus ventilation/perfusion (V/Q) scanning in the examination of patients clinically suspected of having pulmonary embolism (PE). PATIENTS AND METHODS Sixty-three patients, presenting to the emergency department and departments of radiology and nuclear medicine of a large hospital, highly suspected...

2010
Nikolaos L Kelekis Evangelos Athanassiou Dimitra Loggitsi Rebecca Moisidou George Tzovaras Ioannis Fezoulidis

We present the contrast-enhanced spiral CT findings in a case of acute celiac artery occlusion with gastric perforation and total splenic infarction. Spiral CT depicted thrombus in the celiac axis and its branches, stenosis of the superior mesenteric artery, splenic infarction and lack of enhancement of the gastric wall with a large necrotic gap. Spiral CT enabled prompt diagnosis and therapy i...

Journal: :AJNR. American journal of neuroradiology 1995
P A Rubin J R Bilyk I M Dunya A L Weber

Although spiral computed tomography (CT) has certain advantages in other anatomic sites, particularly the thorax (1), abdomen (2, 3), and larynx (4), its advantages over conventional CT imaging in the orbit have been shown in only several clinical scenarios. Use of spiral CT in pediatric craniocervical imaging has been reported recently, with the advantages of shorter scanning time, less motion...

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