Quality evaluation of image recording strategies for limited angle tomography
نویسندگان
چکیده
منابع مشابه
Image processing methods for limited angle tomography and sparse angle tomography
The purpose of medical computed tomography (CT) is to generate a three dimensional (3D) model of inner organs based on number of two dimensional (2D) X-ray images taken from different directions around the patient. Clinical CT imaging improves and extends the operational and diagnostic X-ray imaging since it basically adds a new spatial dimension to the data by converting multiple 2D images int...
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This paper aims to reduce the problems of incomplete data in computed tomography, which happens frequently in medical image process and analysis, e.g., when the high-density region of objects can only be penetrated by X-rays at a limited angular range. As the projection data are available only in an angular range, the incomplete data problem can be attributed to the limited angle problem, which...
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This paper investigates the application of the shift-variant data loss (SVDL) model in image quality assessment for a state-ofthe-art reconstruction technique, the weighted total variation (wTV), in limited angle tomography. The SVDL model is used to analyze the acquired frequency information in 2-D fan-beam limited angle tomography. The wTV algorithm is applied to reconstruct some specific mat...
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Limited-angle positron emission tomography systems can be placed next to the anatomical area of interest, improving their spatial resolution and diagnostic sensitivity. However, the incomplete angular sampling makes the reconstruction process susceptible to image artifacts and anisotropic spatial resolution. In this work, I show that combining total variation (TV) minimization with the maximum ...
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X-ray computed tomography (CT) plays a very important role in daily biomedical practice for diagnosis and therapy, and in materials science for accurate data analysis and quality control. Besides accurate and robust image reconstruction, there is a growing interest in methods for limited angle tomography. The idea is to reduce the X-ray dose delivered to patients or to cope with physical angle ...
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ژورنال
عنوان ژورنال: Tsinghua Science and Technology
سال: 2010
ISSN: 1007-0214
DOI: 10.1016/s1007-0214(10)70004-3