Computed Tomography Techniques

A type of CT scanner that acquires images in a continuous helical or spiral motion around the patient, allowing for the reconstruction of 3D volumes.

The process of acquiring a series of CT images in a helical or spiral pattern to reconstruct a 3D volume of the patient's anatomy.

A set of conductive rings arranged concentrically around a rotating axis.

These rings are used to transmit power and signals to rotating components.

The slip rings connect with rotating parts through sliding contactors.

The slip rings conduct electricity between stationary and rotating components.

The slip ring design allows for continuous power and signal transmission to moving components.

X-ray tubes used in CT scans require a higher thermal capacity than in other diagnostic applications because reduced interscan delays lead to increased heat generation.

CT scanners generate significantly more heat than conventional X-ray machines due to the continuous exposure and high power output required for imaging.

The technology of acquiring CT images in a continuous, helical or spiral motion around the patient. It allows for the reconstruction of 3D volumes by continuously collecting data as the patient moves through the scanner.

X-ray tubes used for helical CT must be able to handle significantly higher power requirements compared to traditional CT. This is because the continuous rotation dictates a much higher rate of X-ray emission.

A critical concern in helical CT is the heat generated by the X-ray tube during continuous operation. The target heats up drastically because of the constant X-ray production.

The components of the X-ray tube are designed to effectively store the heat generated during operation and then efficiently dissipate it to prevent overheating.

Various technical advancements have been incorporated into X-ray tubes specifically for helical CT. These include improved target materials, cooling systems, and efficient heat dissipation mechanisms.

The process of designing and building a CT scanner to minimize its weight while maintaining its functional capabilities.

Materials like thick graphite backing of target disks, large anode diameters, improved high-temperature rotor bearings, and metal housings with ceramic insulators contribute to increased heat capacity in X-ray tubes.

The use of thick graphite backing on target disks helps dissipate heat generated during X-ray production.

The amount of heat generated during CT scanning, caused by the continuous exposure and high power output of the X-ray tube.

X-ray tubes used in CT scanners need to be able to handle more heat than those used for other diagnostic imaging applications.

Large anode diameters allow for a greater surface area to spread heat, reducing the risk of overheating.

Improved high-temperature rotor bearings allow for efficient rotation of the anode, ensuring even heat distribution and limiting overheating.

Designing a CT scanner is a balance between improved functionality and keeping the machine as light as possible.

Increased mass can negatively affect the performance and efficiency of a CT scanner.

Metal housings with ceramic insulators provide a protective layer and prevent heat leaks, helping to maintain a stable temperature.