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We report a case of cystic Hodgkin's disease of the thymus that was evaluated preoperatively by computed tomography (CT). Although this is an uncommon cause of an anterior mediastinal mass, it should be considered in the differential diagnosis along with cystic thymoma and cystic teratomas,...
The variance of the image noise in computed X-ray transmission tomography (CT) due to quantum noise is in a first approximation a nonlinear function of X-ray attenuation. Beam hardening in CT is also a nonlinear function of attenuation. We present a theoretical study of both phenomena. Computer...
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