hw 4

docx

School

Purdue University *

*We aren’t endorsed by this school

Course

242

Subject

Electrical Engineering

Date

Apr 3, 2024

Type

docx

Pages

3

Uploaded by MateFog22985

Report
1- Calculate the nominal voxel dimension for the following image parameters. Imaging frame is 128 x 128 mm2. Please also explain the potential consequences of using high resolution 128/64= 2mm (nominal voxel dimension) 128/128= 1 mm (nominal voxel dimension) The potential conseqences is it can lead to having required more storage space and slow processing time 2- How thick would a lead apron have to be to shield you from 99.9% of the x-rays from a dental exam, assuming they are generated from a Cobalt source? The attenuation coefficient of lead is 0.664 cm-1. N=N0e^-ux N=N0e^-664x .1/99.9= e^-664x Ln(.001)=.0664x X=ln(.001)/-.664 X= 10.4 cm 3- Name the main steps involved in a filtered back projection image acquisition (CT related). -Data is captured and gets put into the singogram space and that helps with reading the pixels -Ramp filter which is a mathematical filter is applied and it helps filtering out the blur of the image - Sinogram are back projected into image space and reconstructed once filtering is done -image is upscaled and completely filtered
Distance= 1.54mm/us*55us*2=169.4 mm Ultrasound gel is a medium that will helps stop air from messing up the scan by getting the ultrasound to send sound waves more effectively in the body and allow a more precise reading and contrast. 1- 1. Ultrasound, 2. Xray, ct scan Reflection refraction attenuation
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
  • Access to all documents
  • Unlimited textbook solutions
  • 24/7 expert homework help