What is Safire in CT scan?

What is Safire in CT scan?

SAFIRE1 is a unique CT iterative reconstruction algorithm that uniquely allows for up to 60% lower radiation dose in your CT examinations without compromising image quality.

How does iterative reconstruction work?

Iterative reconstruction is an algorithmic method that uses statistical and geometric models to variably weight the image data in a process that can be solved iteratively to independently reduce noise and preserve resolution and image quality.

What is iterative reconstruction in CT scan?

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 model based iterative reconstruction?

Model-based iterative reconstruction (MBIR) is a new iterative CT image reconstruction technique. MBIR differs from other iterative reconstruction techniques in that MBIR takes into account the optics of the scanner, including focal spot and detector size.

What are the reconstruction methods for CT imaging?

The most commonly used analytical reconstruction methods on commercial CT scanners are all in the form of filtered backprojection (FBP), which uses a 1D filter on the projection data before backprojecting (2D or 3D) the data onto the image space.

What is filtered back projection vs iterative reconstruction?

Low-dose head CT protocols using filtered back-projection are susceptible to increased noise and decreased image quality. Iterative reconstruction noise suppression allows the use of lower-dose techniques with maintained image quality.

What does CT reconstruction mean?

Updated September 2016 | Download PDF. 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 3D reconstruction for CT?

Three dimensional CT (3D CT) is essentially a method of surface rendition of anatomy by means of a special computer software. The software is available in modern CT scanners as an optional package, or may be available as an auxiliary unit to be used in tandem with an existing scanner [1].

What is back projection in CT?

Backprojection. The standard method of reconstructing CT slices is backprojection. This involves “smearing back” the projection across the image at the angle it was acquired. By smearing back all of the projections, you reconstruct an image.

What is the difference between SFOV and DFOV?

DFOV: Display field of view– determines how much of the scan field of view is reconstructed into an image. DFOV can be less than or equal to the SFOV but cannot be more than the SFOV. High contrast resolution: The ability to distinguish sharp edges between small objects that differ greatly in density.

How long does a 3-D CT scan take?

Typically, you should plan for an hour for a CT scan. Most of that time is for preparation. The scan itself takes between 10 and 30 minutes or less. Generally, you can resume your activities after a healthcare provider says it is safe to do so — usually after they complete the scan and verify clear images.

What is 4D CT scan?

4D CT (computed tomography) represents the next step in imaging. This advanced imaging method makes CT scans much faster and more accurate than ever before. 4D CT uses a new technology that captures the location and movement of your tumor and the movement of your body’s organs over time.