Cross-sectional Imaging 2: Scanner Operation and Parameter Selection

These flashcards cover essential concepts related to scanner operation and parameter selection in cross-sectional imaging.

What are the key session outcomes for the lecture on scanner operation and parameter selection?

Understand protocol selection, key parameters affecting radiation dose and image quality, and the importance of the clinical question in protocol selection.

What factors are considered in protocol design?

Body area, field of view, necessary parameters for image quality, and radiation dose.

Who typically reviews and sets the protocol for a CT scan?

The radiologist or radiographer reviews clinical information and writes the protocol in the electronic system.

What is the effect of kV on CT imaging?

Higher kilovoltage increases photon penetration, which enhances detail and spatial resolution but also raises the radiation dose.

How is mAs relevant to CT imaging?

mAs is the number of photons used in CT; higher mAs improves image quality but also increases the radiation dose.

What does pitch refer to in CT scanning?

Pitch is the distance the table travels per rotation divided by the slice thickness; higher pitch means faster scans and lower radiation dose.

Define spatial resolution in imaging.

Spatial resolution refers to the ability to see small separate objects as distinct items on an image, measured in line pairs per centimeter.

What is the significance of temporal resolution in CT imaging?

Temporal resolution measures the ability to resolve fast-moving objects, important in applications like cardiac CT.

How does slice thickness impact CT imaging?

Thinner slice thickness allows for more accurate data representation but increases radiation dose.

What are kernels in the context of CT imaging?

Kernels are algorithms applied to acquired images to improve image quality, including edge enhancement and soft tissue demonstration.