Internet hand x-rays: A comparison of joint space narrowing and erosion scores (Sharp/Genant) of plain versus digitized x-rays in rheumatoid arthritis patients

Arbillaga, Hector; Montgomery, Gregory P. J.; Cabarrus, Luis P; Watson, Margaret; Martin, Liam; Edworthy, Steven M.

doi:10.1186/1471-2474-3-13

Cited by 9 publications

(9 citation statements)

References 28 publications

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“…The first generation of computer-based methods used to measure the joint space of the knees, hips, and finger joints was based on direct manual annotations on digitized images. Techniques in the second generation of computer-based measurement methods were referred to as computerassisted techniques because user input was combined with a limited degree of automation (5)(6)(7)(8)(9)(10)(11). To our knowledge, all of these methods included manual interaction with the joint as part of the measurement procedure and were limited to the facility where images were acquired.…”

mentioning

confidence: 99%

An Automatic Model-based System for Joint Space Measurements on Hand Radiographs: Initial Experience

Peloschek

Langs²,

Weber³

et al. 2007

Radiology

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This ethics committee-approved pilot study was performed with informed consent. A Web-based service that was developed for automated measurement of joint space and automatic analysis of radiographs was tested prospectively. A total of 160 metacarpophalangeal joint spaces were measured in 20 patients (average age, 48 years; age range, 18-89 years; 16 women) suspected of having rheumatoid arthritis or osteoarthritis. The technical success rate was 93%. The smallest detectable difference in repeated automatic joint space width measurements varied from 0.08 to 0.31 mm, and the coefficient of variation was 2%-7%. Compared with the reference standard (interactive segmentation of the joint space widths) measurements, results were within a mean error of 0.19-0.40 mm. The proposed Web-based service enables reproducible joint space measurements to be obtained in metacarpophalangeal joints with moderate erosive and osteophytic disease.

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mentioning

confidence: 99%

An Automatic Model-based System for Joint Space Measurements on Hand Radiographs: Initial Experience

Peloschek

Langs²,

Weber³

et al. 2007

Radiology

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“…[22][23][24] The low and high values for pairs of raters and the average for all pairs of raters are reported.…”

Section: Discussionmentioning

confidence: 99%

Madelung’s Deformity: Quantitative Assessment of X-Ray Deformity

McCarroll

James

Newmeyer

et al. 2005

The Journal of Hand Surgery

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“…As an evaluative measure of concordance between techniques (Arbillaga et al 2002, King and Chinchilli 2001a, 2001b, Lin 1989), Lin’s concordance coefficient was calculated. Lin’s concordance coefficient (LCC), initially used to compare whether a series of observations reproduces an original series when the variance between measurement devices is unequal, is calculated as the product of the Pearson correlation coefficient ( r P ) and a bias correction factor ( C b ).…”

Section: Methodsmentioning

confidence: 99%

Method comparison of automated matching software-assisted cone-beam CT and stereoscopic kilovoltage x-ray positional verification image-guided radiation therapy for head and neck cancer: a prospective analysis

et al. 2009

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We sought to characterize interchangeability and agreement between cone-beam computed tomography (CBCT) and digital stereoscopic kV x-ray (KVX) acquisition, two methods of isocenter positional verification currently used for IGRT of head and neck cancers (HNC). A cohort of 33 patients were near-simultaneously imaged by in-room KVX and CBCT. KVX and CBCT shifts were suggested using manufacturer software for the lateral (X), vertical (Y) and longitudinal (Z) dimensions. Intra-method repeatability, systematic and random error components were calculated for each imaging modality, as were recipe-based PTV expansion margins. Inter-method agreement in each axis was compared using limits of agreement (LOA) methodology, concordance analysis and orthogonal regression. 100 daily positional assessments were performed before daily therapy in 33 patients with head and neck cancer. Systematic error was greater for CBCT in all axes, with larger random error components in the Y- and Z-axis. Repeatability ranged from 9 to 14 mm for all axes, with CBCT showing greater repeatability in 2/3 axes. LOA showed paired shifts to agree 95% of the time within ±11.3 mm in the X-axis, ±9.4 mm in the Y-axis and ±5.5 mm in the Z-axis. Concordance ranged from ‘mediocre’ to ‘satisfactory’. Proportional bias was noted between paired X- and Z-axis measures, with a constant bias component in the Z-axis. Our data suggest non-negligible differences in software-derived CBCT and KVX image-guided directional shifts using formal method comparison statistics.

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Internet hand x-rays: A comparison of joint space narrowing and erosion scores (Sharp/Genant) of plain versus digitized x-rays in rheumatoid arthritis patients

Abstract: Background: The objective of the study is to examine the reliability of erosion and joint space narrowing scores derived from hand x-rays posted on the Internet compared to scores derived from original plain x-rays.

Cited by 9 publications

References 28 publications

An Automatic Model-based System for Joint Space Measurements on Hand Radiographs: Initial Experience

An Automatic Model-based System for Joint Space Measurements on Hand Radiographs: Initial Experience

Madelung’s Deformity: Quantitative Assessment of X-Ray Deformity

Method comparison of automated matching software-assisted cone-beam CT and stereoscopic kilovoltage x-ray positional verification image-guided radiation therapy for head and neck cancer: a prospective analysis

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