Limitations of Film-Based Radiography

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What is the major shortcoming of radiography mentioned in the text?

Difficulty distinguishing structures of similar density (correct)

Inability to capture images of tumors

Quantitative rather than qualitative nature

Lack of clarity in differentiating bone from soft tissue

How does conventional tomography attempt to address the problem of superimposition in radiography?

By blurring unwanted sections while keeping the desired layer in focus (correct)

By moving the X-ray tube and film in the same direction

By using a higher radiation dosage

By keeping all structures above and below the focused section

What distinguishes conventional tomography from CT imaging?

Motion of the X-ray tube and film (correct)

Image quality

Use of different types of radiation

Cost

Why is distinguishing between homogeneous and heterogeneous objects a challenge in radiography?

Because it is tough to differentiate objects with varying thicknesses Signup and view all the answers

What is the primary goal of tomography?

To remove structures above and below the focused section Signup and view all the answers

What is a significant limitation of radiography and tomography, as mentioned in the text?

Ability to adequately demonstrate slight differences in subject contrast Signup and view all the answers

How does CT imaging differ from conventional radiography, based on the information provided?

CT eliminates superimposition of structures found in plane film imaging Signup and view all the answers

What is a key advantage of digital imaging modalities, like CT, over traditional radiographic film-screen combinations?

Digital imaging can alter contrast after image capture Signup and view all the answers

How is a CT scan beneficial for treatment planning purposes, as detailed in the text?

Guidance for biopsies and radiation therapy Signup and view all the answers

What is the technique used to generate a three-dimensional image for CT scans?

Digital geometry processing of two-dimensional X-ray images Signup and view all the answers

What is a drawback associated with conventional CT scanners, as described in the text?

Long procedure time due to the patient being scanned slice-by-slice Signup and view all the answers

Why does the text mention that only 1-2 seconds are spent on data acquisition during scanning with conventional CT scanners?

To explain the poor temporal resolution and long procedure time Signup and view all the answers

What role do cables play in the functioning of conventional CT scanners, based on the information provided?

They are involved in spooling and releasing during rotation Signup and view all the answers

What is the main reason for the poor temporal resolution in conventional CT scanners, as mentioned in the text?

The slow spooling and respooling of cables Signup and view all the answers

How does the patient's position typically change during a scan with conventional CT scanners?

The patient's position remains stationary throughout the scan Signup and view all the answers

What is the primary reason for the time-consuming nature of conventional CT scanning?

The spooling and respooling of cables during scanning Signup and view all the answers

What contributes to the poor temporal resolution in conventional CT scanners according to the text?

Rotating X-ray tube and detectors Signup and view all the answers

Why does the text highlight the time spent on data acquisition during conventional CT scanning?

To illustrate the inefficiency of the scanning process Signup and view all the answers

Which component plays a significant role in the rotation of conventional CT scanners, affecting the overall procedure time?

Cables Signup and view all the answers

How do the cables on a drum contribute to the overall efficiency of conventional CT scanning?

By reducing the time needed for data acquisition Signup and view all the answers

Limitations of Film-Based Radiography

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Questions and Answers

What is the major shortcoming of radiography mentioned in the text?

How does conventional tomography attempt to address the problem of superimposition in radiography?

What distinguishes conventional tomography from CT imaging?

Why is distinguishing between homogeneous and heterogeneous objects a challenge in radiography?

What is the primary goal of tomography?

What is a significant limitation of radiography and tomography, as mentioned in the text?

How does CT imaging differ from conventional radiography, based on the information provided?

What is a key advantage of digital imaging modalities, like CT, over traditional radiographic film-screen combinations?

How is a CT scan beneficial for treatment planning purposes, as detailed in the text?

What is the technique used to generate a three-dimensional image for CT scans?

What is a drawback associated with conventional CT scanners, as described in the text?

Why does the text mention that only 1-2 seconds are spent on data acquisition during scanning with conventional CT scanners?

What role do cables play in the functioning of conventional CT scanners, based on the information provided?

What is the main reason for the poor temporal resolution in conventional CT scanners, as mentioned in the text?

How does the patient's position typically change during a scan with conventional CT scanners?

What is the primary reason for the time-consuming nature of conventional CT scanning?

What contributes to the poor temporal resolution in conventional CT scanners according to the text?

Why does the text highlight the time spent on data acquisition during conventional CT scanning?

Which component plays a significant role in the rotation of conventional CT scanners, affecting the overall procedure time?

How do the cables on a drum contribute to the overall efficiency of conventional CT scanning?

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