X-Ray Production and CT Gantry Essentials

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What is the purpose of the filter in the x-ray tube?

To capture x-rays that pass through the patient

To shape and limit the x-ray beam

To generate x-rays

To remove low-energy x-rays from the x-ray beam (correct)

What components make up the x-ray tube?

Anode and collimators

Cathode and detectors

Cathode and filter

Cathode and anode (correct)

What is the function of collimators in the x-ray tube?

To generate x-rays

To shape and limit the x-ray beam (correct)

To remove low-energy x-rays from the x-ray beam

To capture x-rays that pass through the patient

What happens when high voltage is applied to the x-ray tube?

Electrons are accelerated towards the anode, producing x-rays Signup and view all the answers

What type of interactions do electrons undergo in the anode of the x-ray tube?

Ionization and Bremsstrahlung Signup and view all the answers

What is the role of the detectors in the x-ray tube?

To capture the x-rays that pass through the patient Signup and view all the answers

What does the operator control in the operation of an x-ray tube?

Current (mA) and potential (kVp) Signup and view all the answers

In computed tomography gantry, what is the purpose of the collimators?

To shape and limit the x-ray beam Signup and view all the answers

What is released from filaments in an x-ray tube?

Electrons Signup and view all the answers

What is the purpose of the multislice detector array in a CT scan?

To capture and convert attenuated x-rays into electrical signals Signup and view all the answers

What is the function of pitch in helical scanning?

Determining the relationship between table speed and gantry rotation Signup and view all the answers

How are tissue attenuation coefficients and CT numbers determined in a CT scan?

By analyzing the interaction of x-ray beams with the tissues Signup and view all the answers

What is the approximate CT number range for bone in a CT scan?

+300 to +1,000 Signup and view all the answers

In a PET/CT study, what does the CT scan provide?

Attenuation map for incorporation into iterative reconstruction of PET scan and anatomic localization Signup and view all the answers

What does the term 'DAS' stand for in the context of CT scans?

Data Acquisition System Signup and view all the answers

What is the role of the gantry in a CT scan?

Rotate around the patient and move synchronously with the x-ray tube and detector array Signup and view all the answers

How are cross-sectional images of the body reconstructed in a multislice CT scan?

By processing raw data using sophisticated algorithms Signup and view all the answers

What does a helical scan involve in a CT scan?

Table moving through gantry as gantry rotates around table one rotation of the gantry is broken into 1000 views Signup and view all the answers

What is the function of the x-ray tube in a CT scan?

Emit a collimated beam of x-rays Signup and view all the answers

What is the purpose of capturing raw data for each slice in a multislice CT?

To create a detailed, three-dimensional representation of internal structures Signup and view all the answers