What is spectral CT?

Dual energy CT, also known as spectral CT, is a computed tomography technique that uses two separate x-ray photon energy spectra, allowing the interrogation of materials that have different attenuation properties at different energies.

What is CT reconstruction?

Image reconstruction in CT is a mathematical process that generates tomographic images from X-ray projection data acquired at many different angles around the patient. Image reconstruction has fundamental impacts on image quality and therefore on radiation dose.

What is prospective reconstruction CT?

the process of using raw data to create an image. Prospective Reconstruction. that which is auto-matically produced during scanning. Retrospective Reconstruction. using the same raw data later to create a new image.

What is GSI in CT scan?

Gemstone Spectral Imaging (GSI) is a novel dual energy application that uses rapid kV switching to acquire the dual energy samples almost simultaneously to generate material density data that can be used for the separation of materials and derivation of monochromatic spectral images using a projection based …

What is dual energy in CT?

Dual-energy CT provides information about how substances behave at different energies, the ability to generate virtual unenhanced datasets, and improved detection of iodine-containing substances on low-energy images.

What is iterative reconstruction CT?

Iterative reconstruction refers to an image reconstruction algorithm used in CT that begins with an image assumption, and compares it to real time measured values while making constant adjustments until the two are in agreement.

What is attenuation on CT?

Attenuation is the measurement of energy absorbed and deflected as it passes through a medium. In simpler terms, attenuation is how much stopping power a material has on energy.

What is DECT CT?

Dual-energy computed tomography (DECT) produces accurate anatomic and functional photos by manipulating the differences in the interactions of high- and low-energy photon spectra with various materials’ and tissues’ atomic factors to accurately discriminate the chemistry of tissues of the body as well as disease …