TITLE

Influence of Sinogram Affirmed Iterative Reconstruction of CT Data on Image Noise Characteristics and Low-Contrast Detectability: An Objective Approach

AUTHOR(S)
von Falck, Christian; Bratanova, Vesela; Rodt, Thomas; Meyer, Bernhard; Waldeck, Stephan; Wacker, Frank; Shin, Hoen-oh
PUB. DATE
February 2013
SOURCE
PLoS ONE;Feb2013, Vol. 8 Issue 2, p1
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Objectives: To utilize a novel objective approach combining a software phantom and an image quality metric to systematically evaluate the influence of sinogram affirmed iterative reconstruction (SAFIRE) of multidetector computed tomography (MDCT) data on image noise characteristics and low-contrast detectability (LCD). Materials and Methods: A low-contrast and a high-contrast phantom were examined on a 128-slice scanner at different dose levels. The datasets were reconstructed using filtered back projection (FBP) and SAFIRE and virtual low-contrast lesions (-20HU) were inserted. LCD was evaluated using the multiscale structural similarity index (MS-SIM*). Image noise texture and spatial resolution were objectively evaluated. Results: The use of SAFIRE led to an improvement of LCD for all dose levels and lesions sizes. The relative improvement of LCD was inversely related to the dose level, declining from 208%(±37%), 259%(±30%) and 309%(±35%) at 25mAs to 106%(±6%), 119%(±9%) and 123%(±8%) at 200mAs for SAFIRE filter strengths of 1, 3 and 5 (p<0.05). SAFIRE reached at least the LCD of FBP at a relative dose of 50%. There was no statistically significant difference in spatial resolution. The use of SAFIRE led to coarser image noise granularity. Conclusion: A novel objective approach combining a software phantom and the MS-SSIM* image quality metric was used to analyze the detectability of virtual low-contrast lesions against the background of image noise as created using SAFIRE in comparison to filtered back-projection. We found, that image noise characteristics using SAFIRE at 50% dose were comparable to the use of FBP at 100% dose with respect to lesion detectability. The unfamiliar imaging appearance of iteratively reconstructed datasets may in part be explained by a different, coarser noise characteristic as demonstrated by a granulometric analysis.
ACCESSION #
87625009

 

Related Articles

  • A Fractional Order Integral Approach for Reconstructing from Noisy Data. Dongjiang Ji; Wenzhang He // Journal of Software (1796217X);Jan2014, Vol. 9 Issue 1, p240 

    Computed tomography (CT) plays an important role in many applications. Recently,total variation(TV) minimization has become a main topic in image reconstruction. This paper focuses on iterative algorithm: SART and EM in both of TV and ordered subset. Iterative reconstruction is an improved...

  • Iterative reconstruction algorithm for half-cover dual helical cone-beam computed tomography. Zhao, Yunsong; Zou, Xiaobing; Yu, Wei // Insight: Non-Destructive Testing & Condition Monitoring;May2013, Vol. 55 Issue 5, p232 

    Cone-beam computed tomography (CT) can be used for rapid volumetric imaging with high longitudinal resolution and is used extensively in a variety of non-destructive testing (NDT) and non-destructive evaluation (NDE) applications. But the field of view (FOV) of cone-beam CT is limited because of...

  • Image quality of low-dose CCTA in obese patients: impact of high-definition computed tomography and adaptive statistical iterative reconstruction. Gebhard, Cathérine; Fuchs, Tobias; Fiechter, Michael; Stehli, Julia; Stähli, Barbara; Gaemperli, Oliver; Kaufmann, Philipp // International Journal of Cardiovascular Imaging;Oct2013, Vol. 29 Issue 7, p1565 

    The accuracy of coronary computed tomography angiography (CCTA) in obese persons is compromised by increased image noise. We investigated CCTA image quality acquired on a high-definition 64-slice CT scanner using modern adaptive statistical iterative reconstruction (ASIR). Seventy overweight and...

  • Influence of iterative image reconstruction on CT-based calcium score measurements. Osch, Jochen; Mouden, Mohamed; Dalen, Jorn; Timmer, Jorik; Reiffers, Stoffer; Knollema, Siert; Greuter, Marcel; Ottervanger, Jan; Jager, Piet // International Journal of Cardiovascular Imaging;Jun2014, Vol. 30 Issue 5, p961 

    Iterative reconstruction techniques for coronary CT angiography have been introduced as an alternative for traditional filter back projection (FBP) to reduce image noise, allowing improved image quality and a potential for dose reduction. However, the impact of iterative reconstruction on the...

  • GPU accelerated voxel-driven forward projection for iterative reconstruction of cone-beam CT. Yi Du; Gongyi Yu; Xincheng Xiang; Xiangang Wang; Du, Yi; Yu, Gongyi; Xiang, Xincheng; Wang, Xiangang // BioMedical Engineering OnLine;1/5/2017, Vol. 16, p1 

    Background: For cone-beam computed tomography (CBCT), which has been playing an important role in clinical applications, iterative reconstruction algorithms are able to provide advantageous image qualities over the classical FDK. However, the computational speed of iterative...

  • A Novel Iterative CT Reconstruction Approach Based on FBP Algorithm. Shi, Hongli; Luo, Shuqian; Yang, Zhi; Wu, Geming // PLoS ONE;9/29/2015, Vol. 10 Issue 9, p1 

    The Filtered Back-Projection (FBP) algorithm and its modified versions are the most important techniques for CT (Computerized tomography) reconstruction, however, it may produce aliasing degradation in the reconstructed images due to projection discretization. The general iterative...

  • Observer performance for adaptive, image-based denoising and filtered back projection compared to scanner-based iterative reconstruction for lower dose CT enterography. Fletcher, Joel; Hara, Amy; Fidler, Jeff; Silva, Alvin; Barlow, John; Carter, Rickey; Bartley, Adam; Shiung, Maria; Holmes, David; Weber, Nicolas; Bruining, David; Yu, Lifeng; McCollough, Cynthia // Abdominal Imaging;Jun2015, Vol. 40 Issue 5, p1050 

    Purpose: The purpose of this study was to compare observer performance for detection of intestinal inflammation for low-dose CT enterography (LD-CTE) using scanner-based iterative reconstruction (IR) vs. vendor-independent, adaptive image-based noise reduction (ANLM) or filtered back projection...

  • Video Superresolution Reconstruction Using Iterative Back Projection with Critical-Point Filters Based Image Matching. Zhang, Yixiong; Tao, Mingliang; Yang, Kewei; Deng, Zhenmiao // Advances in Multimedia;3/12/2015, Vol. 2015, p1 

    To improve the spatial resolution of reconstructed images/videos, this paper proposes a Superresolution (SR) reconstruction algorithm based on iterative back projection. In the proposed algorithm, image matching using critical-point filters (CPF) is employed to improve the accuracy of image...

  • Dependence Image Quality On The Type Of Filter And The Cut-Off Value in SPECT Reconstruction Using FBP. Alireza, Sadremomtaz; Payvand, Taherparvar // AIP Conference Proceedings;12/27/2011, Vol. 1400 Issue 1, p363 

    Image reconstruction is an important part of nuclear medicare imagmg technique. Different types of image reconstruction have been used for this propose. Despite of the fact that there are new techniques of image reconstruction, still filtered back projection method is widely used due to its...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics