Noise, sampling, and the number of projections in cone‐beam CT with a flat‐panel detector

Z Zhao, GJ Gang, JH Siewerdsen - Medical physics, 2014 - Wiley Online Library
Purpose: To investigate the effect of the number of projection views on image noise in cone‐
beam CT (CBCT) with a flat‐panel detector. Methods: This fairly fundamental consideration …

Cascaded systems analysis of the 3D noise transfer characteristics of flat‐panel cone‐beam CT

DJ Tward, JH Siewerdsen - Medical physics, 2008 - Wiley Online Library
The physical factors that govern 2D and 3D imaging performance may be understood from
quantitative analysis of the spatial‐frequency‐dependent signal and noise transfer …

Effect of scattered radiation on image noise in cone beam CT

M Endo, T Tsunoo, N Nakamori, K Yoshida - Medical physics, 2001 - Wiley Online Library
Cone beam CT has a capability for the 3‐dimensional imaging of large volumes with
isotropic resolution, and has a potentiality for 4‐dimensional imaging (dynamic volume …

Analysis of image noise in 3D cone-beam CT: spatial and Fourier domain approaches under conditions of varying stationarity

AR Pineda, JH Siewerdsen… - Medical Imaging 2008 …, 2008 - spiedigitallibrary.org
The statistical properties of medical images are central in characterizing the performance of
imaging systems. The noise in cone-beam CT (CBCT) is often characterized using Fourier …

Noise correlation in CBCT projection data and its application for noise reduction in low‐dose CBCT

H Zhang, L Ouyang, J Ma, J Huang, W Chen… - Medical …, 2014 - Wiley Online Library
Purpose: To study the noise correlation properties of cone‐beam CT (CBCT) projection data
and to incorporate the noise correlation information to a statistics‐based projection …

Cone-beam CT with a flat-panel imager: Noise considerations for fully 3D computed tomography

JH Siewerdsen, DA Jaffray - Medical Imaging 2000: Physics of …, 2000 - spiedigitallibrary.org
Application of flat-panel imagers (FPIs) in cone-beam computed tomography (CBCT) offers a
promising new modality for full three-dimensional (3-D) x-ray imaging. Understanding the …

Noise power properties of a cone‐beam CT system for breast cancer detection

K Yang, ALC Kwan, SY Huang, NJ Packard… - Medical …, 2008 - Wiley Online Library
The noise power properties of a cone‐beam computed tomography (CT) system dedicated
for breast cancer detection were investigated. Uniform polyethylene cylinders of various …

Validation of CT dose‐reduction simulation

P Massoumzadeh, S Don, CF Hildebolt… - Medical …, 2009 - Wiley Online Library
The objective of this research was to develop and validate a custom computed tomography
dose‐reduction simulation technique for producing images that have an appearance …

Noise aliasing and the 3D NEQ of flat‐panel cone‐beam CT: effect of 2D/3D apertures and sampling

DJ Tward, JH Siewerdsen - Medical physics, 2009 - Wiley Online Library
The ability to tune an imaging system to be optimal for a specific task is an essential
component of image quality. This article discusses the ability to tune the noise‐equivalent …

Low‐dose preview for patient‐specific, task‐specific technique selection in cone‐beam CT

AS Wang, JW Stayman, Y Otake, S Vogt… - Medical …, 2014 - Wiley Online Library
Purpose: A method is presented for generating simulated low‐dose cone‐beam CT (CBCT)
preview images from which patient‐and task‐specific minimum‐dose protocols can be …