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Questions and Answers
Questions and Answers
What happens to the data obtained at the detector channel in CT?
What happens to the data obtained at the detector channel in CT?
- They are discarded as they are not useful
- They are immediately used to create the final image
- They are passed on as electric signals corresponding to the actual x-ray attenuation (correct)
- They are converted into sound waves for analysis
What is the basic principle of computed tomography (CT)?
What is the basic principle of computed tomography (CT)?
- Direct measurement of x-ray attenuation
- Measuring the weakening of x-rays at numerous positions around the patient (correct)
- Creating a 3D model of the patient's body using x-rays
- Counting the number of x-rays passing through the patient
How are the electric signals from the detector channel processed in CT?
How are the electric signals from the detector channel processed in CT?
- They are digitized and transmitted to the image processor (correct)
- They are directly converted into visual images
- They are amplified and then sent for analysis
- They are used to adjust the x-ray tube settings
What is the 'pipeline principle' in CT reconstruction referring to?
What is the 'pipeline principle' in CT reconstruction referring to?
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What is the role of the image processor in CT?
What is the role of the image processor in CT?
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Study Notes
Study Notes
Computed Tomography (CT) Principles
- The data obtained at the detector channel in CT is converted into electric signals, which are then processed and reconstructed into an image.
Basic Principle of CT
- The basic principle of CT is based on the rotational X-ray beam and the attenuation of X-ray intensity as it passes through the body.
Signal Processing in CT
- The electric signals from the detector channel are processed through a series of steps, including amplification, filtration, and digitization, to produce raw data.
The 'Pipeline Principle' in CT Reconstruction
- The 'pipeline principle' in CT reconstruction refers to the series of sequential steps involved in image reconstruction, including filtering, backprojection, and image display.
Role of the Image Processor in CT
- The image processor in CT plays a crucial role in reconstructing the final image from the raw data, applying algorithms to correct for artifacts and improve image quality.
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