This is a video about SFOV (Scanner Field of View), Reconstructed Field of View and the more common Display Field of View (DFOV) for CT scanning (computed tomography). These are used slightly...

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. Also called spatial resolution.

Once the projection data have been acquired, operators can choose the size of the reconstruction field of view (FOV). The majority of CT images have a reconstructed FOV that is set equal to the size of the patient being imaged, as depicted by the two left images in Figure G.

DFOV: Calculate the DFOV for an image with a 320^2 matrix and a pixel dimention of .75 x .75 mm. The formula for DFOV is pixel dimension x the matrix size. 320 x .75 mm = 240mm or 24 cm DFOV. Answer: 240mm or 24 cm DFOV

Nov 2, 2023 · In-plane resolution depends on matrix size and display field of view (DFOV). Matrix size determines pixel size, and adjusting DFOV changes to image and pixel dimensions. Larger DFOV leads to larger pixels and lower spatial detail. Pixel size affects accuracy, with smaller pixels reducing volume averaging and enhancing spatial resolution.

(DFOV / RFOV) The display field of view is a selectable scan factor measured from the center of the patient to the most distant located edge of the patient. (RFOV) The reconstruction field of view is the size of the scan field of view (SFOV) that is reconstructed to form a CT image.

CT Basics Dianna Cody, Ph.D. Professor & Chief, Radiologic Physics U.T. M.D. Anderson Cancer Center “Pure” CT • Information regarding attenuation correction with CT AND ... • Image zoom Voxel size = DFOV/512 512 50 cm DFOV X-Y Voxel Size 512 pixels pixels Pixel = ~ 1 mm

Dec 7, 2016 · For most patients, it is possible to scan both ankles simultaneously within a 22cm DFOV, allowing a side by side comparison of the symptomatic ankle with the normal ankle. For the CT of the foot, the DFOV should be enlarged to include the entire forefoot “the metatarsals and phalanges” along with the hindfoot and midfoot.

Sep 4, 2022 · This document provides an overview of key concepts in CT scanning, including: - A tomographic image represents a slice of the patient's anatomy, and CT scans can reconstruct slices in axial, sagittal, and coronal planes. - Attenuation of x-rays forms CT images, and the attenuation coefficient depends on density.

Sep 22, 2021 · In CT there is a SFOV (Scan Field Of View) and DFOV (Display Field Of View). The scan field of view is the area over which the CT machine collects raw data. The display field of view is the area that is reconstructed for image display.