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PET Tomograph Components and Event Detection Quiz

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PET Tomograph Components and Event Detection Quiz

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Questions and Answers

What is the purpose of the coincidence timing window (CTW) in PET tomography event detection?

To ensure that two annihilation photons are detected within a specific time frame (correct)

To determine the exact time of event occurrence

To calculate the line of response (LOR) between two detectors

To identify the location of the imaging table

What is the function of the detector blocks in a PET tomograph?

To estimate randoms using singles methods

To identify the bed positions for image acquisition

To display the 3D image matrix

To detect and identify individual events and determine the line of response (LOR) (correct)

What is the purpose of multiple acquisitions in PET studies at different bed positions?

To determine the scintillation light pattern for each crystal within the detector block

To estimate randoms using delayed coincidence and singles methods

To capture the entire area of interest in the imaging table (correct)

To calculate the coincidence timing window (CTW)

What is used to identify the crystal that detected an event in PET tomography?

Anger positioning logic or a look up table Signup and view all the answers

What is the purpose of electronic detection of coincidence events in PET tomography?

To detect and identify individual events for further processing Signup and view all the answers

What is the primary function of delayed coincidence and estimation from singles methods in PET tomography?

To estimate randoms for accurate image acquisition Signup and view all the answers

What is the main difference between 2D and 3D PET imaging?

The number of registered events Signup and view all the answers

How does 2D PET imaging improve image quality?

By absorbing cross plane annihilation photons Signup and view all the answers

What is the purpose of holding each event for several CTWs in delayed sinogram?

To register more random and scatter events Signup and view all the answers

Which type of PET imaging has fewer random and scatter coincidences?

2D imaging Signup and view all the answers

How does 3D PET imaging differ from 2D PET imaging in terms of sensitivity?

3D imaging has higher sensitivity due to retracting the septa Signup and view all the answers

What is the impact of 3D PET imaging retracting the septa?

It decreases sensitivity and increases scatter events Signup and view all the answers