What is PET image reconstruction?
What is PET image reconstruction?
Reconstruction is the process where actual PET image is formed from the raw data (sinograms) collected by the PET scanner. PET images are normally reconstructed from the raw data by the personnel of PET centre using the software provided by scanner manufacturers, and images are stored in PACS.
What is MRI image reconstruction?
The MRI raw data is not acquired in image space and the role of the image reconstruction process is to transform the acquired raw data into images that can be interpreted clinically. This process involves multiple signal processing steps that each have an impact on the image quality.
Why do I need a PET scan after an MRI?
PET scans can detect cancers, as well as organs that are not working normally (such as areas of the brain affected by Alzheimer’s disease or areas of the heart that have been damaged by blocked blood vessels).
Is a PET scan considered an MRI?
A PET/MRI scan is a two-in-one test that combines images from a positron emission tomography (PET) scan and a magnetic resonance imaging (MRI) scan. This new hybrid technology harnesses the strengths of PET and MRI to produce some of the most highly detailed pictures of the inside of your body currently available.
How does iterative reconstruction work?
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 a Sinogram pet?
Comparing the raw data acquired in PET to that in SPECT, each projection image in SPECT represents the data acquired at that projection angle across all slices, whereas in PET each sinogram represents the data acquired for that slice across all projection angles.
Why is K space called K space?
The k-space is an extension of the concept of Fourier space well known in MR imaging. The k-space represents the spatial frequency information in two or three dimensions of an object. The k-space is defined by the space covered by the phase and frequency encoding data.
What is the role of the reconstruction matrix?
The reconstruction matrix is the array of rows and columns of pixels in the reconstructed image. This array of rows and columns of pixels is typically between 512 x 512 and 1024 x 1024. Reconstruction. Reconstruction is the mathematical process by which the displayed image is produced from the raw data.
Can you have an MRI and a PET scan on the same day?
ยป Can a patient have a CT scan, diagnostic X-ray examination or MRI scan on the same day as the PET/CT scan? The PET scan will not affect the performance of these investigations.
Is a PET scan machine like an MRI machine?
Unlike MRIs, PET scans use positrons. A tracer is injected into your body that allows the radiologist to see the area scanned. An MRI scan can be used when your organ shape or blood vessels are in question, whereas PET scans will be used to see your body’s function.
