hw3_solution_2009

hw3_solution_2009 - BME210 Spring2009 BME 210 2009 Spring...

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BME210 Spring2009 BME 210 2009 Spring Semester Homework 3 Medical Imaging (50 points) Part 1: Introduction X-ray computed tomography or CT (Computerized tomography) is a form of medical imaging that allows a radiologist to see axial slices of human anatomy. CT is an imaging technique that use data collected by detectors when beams of x-ray photons are passed through an object. A rotating gantry projects x-rays through the subject from a number of angles. The amounts of x-rays that are able penetrate the body through each angle constitute the basis of the final image. Therefore, bone is bright being most absorbent and air being dark. The process of x-rays being absorbed by the body is known as attenuation. Each voxel (3 dimensional spatial equivalent of the pixel in the CT image), has an attenuation coefficient associated with it. The reconstructed image constitutes a map of the attenuation coefficients of all the voxels in the field of view. The problem
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This note was uploaded on 03/30/2010 for the course BME 210 taught by Professor D'argenio during the Spring '07 term at USC.

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hw3_solution_2009 - BME210 Spring2009 BME 210 2009 Spring...

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