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Evaluation of Manual Angulation Fixed Focal Approach Using Flat Panel Detector in Digital Radiography of Scoliosis

Scoliosis patient underwent numerous spine radiographs during their monitor and treatment period, thus, may expose them to high accumulative radiation dose. In this study, the diagnostic performance of the flat panel detector (FPD) fixed focal approach with manual angulation was evaluated in term of...

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Main Authors: Tan, Sock Keow, Sarji, Sazilah Ahmad, Ng, Kwan Hoong, Yeong, Chai Hong
Format: Article
Published: American Scientific Publishers 2015
Subjects:
R Medicine
Online Access:http://eprints.um.edu.my/19615/
http://dx.doi.org/10.1166/jmihi.2015.1450
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spelling my.um.eprints.196152018-10-05T05:35:04Z http://eprints.um.edu.my/19615/ Evaluation of Manual Angulation Fixed Focal Approach Using Flat Panel Detector in Digital Radiography of Scoliosis Tan, Sock Keow Sarji, Sazilah Ahmad Ng, Kwan Hoong Yeong, Chai Hong R Medicine Scoliosis patient underwent numerous spine radiographs during their monitor and treatment period, thus, may expose them to high accumulative radiation dose. In this study, the diagnostic performance of the flat panel detector (FPD) fixed focal approach with manual angulation was evaluated in term of accuracy and consistency of Cobb angle measurement, spatial accuracy as well as radiation dose to the patients compared to the conventional photostimulable phosphor (PSP) approach. Cobb angle measurements were evaluated with two special constructed human vertebrae phantoms. The intraclass correlation coefficients (ICC) for interobserver variation and percentage of accuracy in Cobb angle measurement were calculated. The significant differences in angle measurement between both approaches were assessed. The spatial accuracy was evaluated with TO.M1 phantom. Dose measurements were performed with radiochromic film and 20 cm polymethyl methacrylate (PMMA) slabs. The FPD fixed focal approach showed excellent interobserver reproducibility (ICC, r = 0.99, p < 0.05) for the Cobb angle measurement. There was no statistically significant difference (p > 0.05) for the Cobb angle measured from both approaches. The FPD fixed focal approach resulted in higher accuracy (3%) of angle measurement compared to the conventional PSP approach. The spatial accuracy was within the recommended limit of AAPM report 93. An average entrance surface dose (ESD) reduction of 20% was achieved with FPD fixed focal approach. We developed and evaluated a manual tube angulation method which facilitates the use of existing FPD digital radiography system to produce full spine image. It has good consistency and high accuracy in the measurement of Cobb angle. The acquired images are suitable for angle measurement for scoliosis patients with substantial dose reduction. American Scientific Publishers 2015 Article PeerReviewed Tan, Sock Keow and Sarji, Sazilah Ahmad and Ng, Kwan Hoong and Yeong, Chai Hong (2015) Evaluation of Manual Angulation Fixed Focal Approach Using Flat Panel Detector in Digital Radiography of Scoliosis. Journal of Medical Imaging and Health Informatics, 5 (4). pp. 697-703. ISSN 2156-7018 http://dx.doi.org/10.1166/jmihi.2015.1450 doi:10.1166/jmihi.2015.1450
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic R Medicine
spellingShingle R Medicine
Tan, Sock Keow
Sarji, Sazilah Ahmad
Ng, Kwan Hoong
Yeong, Chai Hong
Evaluation of Manual Angulation Fixed Focal Approach Using Flat Panel Detector in Digital Radiography of Scoliosis
description Scoliosis patient underwent numerous spine radiographs during their monitor and treatment period, thus, may expose them to high accumulative radiation dose. In this study, the diagnostic performance of the flat panel detector (FPD) fixed focal approach with manual angulation was evaluated in term of accuracy and consistency of Cobb angle measurement, spatial accuracy as well as radiation dose to the patients compared to the conventional photostimulable phosphor (PSP) approach. Cobb angle measurements were evaluated with two special constructed human vertebrae phantoms. The intraclass correlation coefficients (ICC) for interobserver variation and percentage of accuracy in Cobb angle measurement were calculated. The significant differences in angle measurement between both approaches were assessed. The spatial accuracy was evaluated with TO.M1 phantom. Dose measurements were performed with radiochromic film and 20 cm polymethyl methacrylate (PMMA) slabs. The FPD fixed focal approach showed excellent interobserver reproducibility (ICC, r = 0.99, p < 0.05) for the Cobb angle measurement. There was no statistically significant difference (p > 0.05) for the Cobb angle measured from both approaches. The FPD fixed focal approach resulted in higher accuracy (3%) of angle measurement compared to the conventional PSP approach. The spatial accuracy was within the recommended limit of AAPM report 93. An average entrance surface dose (ESD) reduction of 20% was achieved with FPD fixed focal approach. We developed and evaluated a manual tube angulation method which facilitates the use of existing FPD digital radiography system to produce full spine image. It has good consistency and high accuracy in the measurement of Cobb angle. The acquired images are suitable for angle measurement for scoliosis patients with substantial dose reduction.
format Article
author Tan, Sock Keow
Sarji, Sazilah Ahmad
Ng, Kwan Hoong
Yeong, Chai Hong
author_facet Tan, Sock Keow
Sarji, Sazilah Ahmad
Ng, Kwan Hoong
Yeong, Chai Hong
author_sort Tan, Sock Keow
title Evaluation of Manual Angulation Fixed Focal Approach Using Flat Panel Detector in Digital Radiography of Scoliosis
title_short Evaluation of Manual Angulation Fixed Focal Approach Using Flat Panel Detector in Digital Radiography of Scoliosis
title_full Evaluation of Manual Angulation Fixed Focal Approach Using Flat Panel Detector in Digital Radiography of Scoliosis
title_fullStr Evaluation of Manual Angulation Fixed Focal Approach Using Flat Panel Detector in Digital Radiography of Scoliosis
title_full_unstemmed Evaluation of Manual Angulation Fixed Focal Approach Using Flat Panel Detector in Digital Radiography of Scoliosis
title_sort evaluation of manual angulation fixed focal approach using flat panel detector in digital radiography of scoliosis
publisher American Scientific Publishers
publishDate 2015
url http://eprints.um.edu.my/19615/
http://dx.doi.org/10.1166/jmihi.2015.1450
_version_ 1643691039381258240
score 13.211869

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