Hokkaido Helical CT Research Group
نویسندگان
چکیده
منابع مشابه
oving Beam Helical CT Scanning
Images generated with helical scanning are degraded by partial volume artifacts caused by an increased slice thickness when compared to conventional computed tomography (CT) scanning. The slice thickness for a helical scan is proportional to the sum of the thickness of the fan of radiation and the distance the patient moves during data acquisition. We present a method called moving beam helical...
متن کامل[Helical CT in left ventricular pseudoaneurysm rupture].
Rev Esp Cardiol 2002;55(11):1201 1201 A 51-year-old male patient was seen in the emergency room for back pain irradiated to the neck of one week in duration. During the examination, the patient presented hypotension. The electrocardiogram (ECG) showed negative T waves on the inferior face and tall T waves in V1 and V2. In the chest radiograph, mediastinal widening and cardiomegaly were evident....
متن کاملMulti-slice helical CT: scan and reconstruction.
The multi-slice CT scanner refers to a special CT system equipped with a multiple-row detector array to simultaneously collect data at different slice locations. The multi-slice CT scanner has the capability of rapidly scanning large longitudinal (z) volume with high z-axis resolution. It also presents new challenges and new characteristics. In this paper, we study the scan and reconstruction p...
متن کاملHelical CT : Principles and Technical Considerations 1
. INTRODUCTION Helical computed tomography (CT) offers several technical advantages that have revolutionized body CT. Use of helical technology has improved established CT applications by the minimization of motion artifacts, the elimination of respiratory misregistration artifacts (1,2), and the production of overlapping images without additional x-ray exposure (3-5). New applications involvin...
متن کاملART for helical cone-beam CT reconstruction
We report on our first results on the use of Algebraic Reconstruction Techniques (ART) on helical cone-beam Computerized Tomography (CT) data. Two variants of ART have been implemented: a standard one which considers a single ray in an iterative step and a block version which groups several conebeam projections in calculating an iterative update. Both seem to produce high-quality reconstruction...
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ژورنال
عنوان ژورنال: Japanese Journal of Radiological Technology
سال: 2005
ISSN: 0369-4305,1881-4883
DOI: 10.6009/jjrt.kj00004039785