ECE+280+Exam+2+Spring+2009

ECE+280+Exam+2+Spring+2009 - ECE / BIOEN 280 Biomedical...

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ECE / BIOEN 280 Biomedical Imaging Exam #2 April 9, 2009 9:00 – 10:20 am Student Name: _____________________________________________ Grading: Problem 1 (20 points): __________ Problem 2 (20 points): __________ Problem 3 (20 points): __________ Problem 4 (20 points): __________ Problem 5 (20 points): __________ Total (100 points): __________
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1. Computed Tomography. Below are two objects. For each, draw the corresponding sinogram using the axes given. Also, label the axes. Below are four filtered backprojection reconstructions of the two objects above. For each, indicate if a Ram-Lak or a Hamming filter was applied. Explain how you determined this.
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2. Nuclear Medicine – Radioactivity. In class, we defined radioactivity, Q, as: Q = -dN(t)/dt = λ N(t) where N is the number of nuclei of a particular element. Solve this equation, or simply write the expression for N(t). If the decay constant is 0.5 hr -1 , then what is the half-life ( τ 1/2 ) of this radioactive decay? If
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ECE+280+Exam+2+Spring+2009 - ECE / BIOEN 280 Biomedical...

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