Podcast
Questions and Answers
What is the primary phenomenon that occurs when an x-ray beam interacts with a structure in a CT image?
What is the primary phenomenon that occurs when an x-ray beam interacts with a structure in a CT image?
- Attenuation (correct)
- Diffraction
- Refraction
- Scattering
What is the unit of measurement for the linear attenuation coefficient?
What is the unit of measurement for the linear attenuation coefficient?
- mm^-1
- cm^-1 (correct)
- nm^-1
- m^-1
In conventional film-screen radiography, how are the densities of structures determined?
In conventional film-screen radiography, how are the densities of structures determined?
- By comparing the shades of gray to known objects (correct)
- Via the linear attenuation coefficient
- Through quantitative measurements
- Using the Hounsfield scale
What are the units of measurement for quantifying beam attenuation in CT?
What are the units of measurement for quantifying beam attenuation in CT?
What is the term used to describe the reduction of a beam's intensity as it passes through a material?
What is the term used to describe the reduction of a beam's intensity as it passes through a material?
Who is credited with the development of CT and has units of measurement named after him?
Who is credited with the development of CT and has units of measurement named after him?
What is the Hounsfield unit value of distilled water?
What is the Hounsfield unit value of distilled water?
What is the purpose of windowing in CT images?
What is the purpose of windowing in CT images?
What is the range of CT numbers?
What is the range of CT numbers?
What is the purpose of the Window Width (WW)?
What is the purpose of the Window Width (WW)?
What is the typical Window Level (WL) for a Soft Tissue window?
What is the typical Window Level (WL) for a Soft Tissue window?
What is the purpose of a Bone window?
What is the purpose of a Bone window?
