CT Scan ECG Gating

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Questions and Answers

Why is a noise-free ECG signal crucial for ECG-gated CT imaging?

To ensure patient comfort during the scanning process.
To speed up the image reconstruction process.
To reduce the overall radiation dose to the patient.
To synchronize the ECG signal with the raw image data, improving image quality. (correct)

What is the primary purpose of practicing breath-holding before a CT scan?

To improve the effectiveness of contrast agents.
To reduce anxiety associated with the scanning procedure.
To ensure the patient remains still during the scan, minimizing motion artifacts. (correct)
To increase lung capacity.

How many ECG leads are typically attached to obtain an adequate tracing for CT?

Three (correct)
Four
One
Two

What is the typical duration a patient may need to hold their breath during a CT scan?

15-20 seconds (B) Signup and view all the answers

Prior to attaching ECG electrodes for CT imaging, what preparation step is essential?

Cleaning the skin to ensure good contact. (D) Signup and view all the answers

What is the purpose of ECG gating in CT scanning?

To synchronize image acquisition with the patient's heart rhythm, reducing motion artifacts. (A) Signup and view all the answers

Up to how many self-adhesive electrodes might be attached to a patient's skin during ECG gating?

12 (D) Signup and view all the answers

Why is it important to avoid movement during a breath-hold CT scan?

To minimize motion artifacts, which degrade image quality. (A) Signup and view all the answers

What locations on the body are typically used for the placement of ECG electrodes during CT scanning?

Arms, legs, and chest (D) Signup and view all the answers

What is the relationship between ECG gating and the raw image data acquired during a CT scan?

ECG gating synchronizes the acquisition of raw image data with the patient's cardiac cycle. (C) Signup and view all the answers

Flashcards

Breath Holding (CT Scan)

Holding your breath for a short period, typically 15-20 seconds, during a CT scan to minimize motion artifacts and ensure clear images.

ECG Gating

A technique used in CT scanning to synchronize image acquisition with the patient's cardiac cycle, reducing motion artifacts and improving image quality.

ECG Setup for CT

Clean skin, attach electrodes, and connect ECG leads to get a noise-free ECG signal for synchronizing with raw image data during CT.

Noise-Free ECG Signal

Essential for synchronizing the ECG signal to the raw image data, ensuring accurate timing and alignment between the ECG and the CT images.

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Study Notes

During the test, a breath hold of 15-20 seconds will be necessary.
Practicing breath holding before the scan is recommended.

ECG Gating

The skin is cleaned.
Up to 12 self-adhesive electrodes are attached to select locations on the skin of the arms, legs, and chest for ECG gating during a CT scan.
Three ECG leads are attached to obtain an adequate ECG tracing for CT.
A noise-free ECG signal is important to synchronize the ECG signal to the raw image data.