The use of cross-correlation analysis between high-frequency ultrasound images to measure longitudinal median nerve movement

Dilley, Andrew; Greening, Jane; Lynn, Bruce; Leary, Rachel; Morris, Vanessa

doi:10.1016/s0301-5629(01)00413-6

Cited by 119 publications

(137 citation statements)

References 27 publications

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“…1 Speckle tracking of ultrasound images has been employed to assess longitudinal sliding of the median nerve. 15,28 Color Doppler ultrasound has been used successfully for measurements of flexor tendon excursion. 29 We used spectral Doppler to measure the relative velocities of the tendon and SSCT because of its ability to identify anatomical structures interrogated by the scan plane in motion and, at the same time, to steer the beam and place the Doppler gate at the desired location in the tendon or SSCT.…”

Section: Discussionmentioning

confidence: 99%

High‐resolution ultrasound analysis of subsynovial connective tissue in human cadaver carpal tunnel

Ettema

Bělohlávek

Zhao

et al. 2006

Journal Orthopaedic Research

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The carpal tunnel contains the median nerve, nine flexor tendons, two synovial bursae, and peritendinous subsynovial connective tissue (SSCT). Fibrosis of the SSCT is the most consistent pathological finding in patients with carpal tunnel syndrome. We investigated the anatomy and gliding characteristics of the flexor digitorum superficialis tendon and its adjacent SSCT with high-resolution ultrasound (15 MHz). Our hypotheses were that tendon and SSCT are distinguishable by ultrasound and that their velocities during tendon excursion are different. Qualitative ultrasound analysis of a flexor tendon and its SSCT was performed on five cadaver wrists and correlated to respective findings after anatomical study of the same cadavers. Quantitative Doppler velocity analysis of eight cadaver wrists was done to assess the sliding movement of the tendon and its SSCT within the carpal tunnel. No significant difference was found between the thickness of SSCT measured by ultrasound and that measured directly after dissection. The SSCT moved slower than its flexor tendon. The SSCT velocities were statistically different from the tendon velocities (t-test, p > 0.001). High-resolution ultrasound is a very precise method to display the anatomy of the tendon and SSCT within the carpal tunnel, and their different velocities can be detected with Doppler. Noninvasive assessment of the thickness and velocity of the tenosynovium in carpal tunnel syndrome by high-resolution sonography might be a new diagnostic tool for disorders affecting the SSCT, especially carpal tunnel syndrome. ß

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Section: Discussionmentioning

confidence: 99%

High‐resolution ultrasound analysis of subsynovial connective tissue in human cadaver carpal tunnel

Ettema

Bělohlávek

Zhao

et al. 2006

Journal Orthopaedic Research

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“…24 During the analysis, the program compares the grayscale values of speckle features from the regions of interest within the nerve between adjacent frames of the image sequence. In the compared frame, the coordinates of the regions of interest are offset along the horizontal and vertical image planes 1 pixel at a time within a predetermined range.…”

Section: Imagingmentioning

confidence: 99%

“…Each video sequence was then analyzed offline, using a method of frameby-frame cross-correlation analysis that was developed in MATLAB (The MathWorks, Inc, Natick, MA) by Dilley et al 24 This method employs a cross-correlation algorithm to determine relative movement between successive frames in a sequence of ultrasound images. 24 During the analysis, the program compares the grayscale values of speckle features from the regions of interest within the nerve between adjacent frames of the image sequence.…”

Section: Imagingmentioning

confidence: 99%

“…22,24,27 Video Selection Criteria Each ultrasound video sequence was reviewed several times. To be selected for analysis, the video sequence must have had clear pixelation and clear identification of the sciatic nerve throughout the 3-second duration.…”

Section: Imagingmentioning

confidence: 99%

“…The peak of a quadratic equation fitted to the maximum 3 correlation coefficients is equivalent to the pixel shift/ movement between adjacent frames. 24 Pixel-shift measurements for the nerve were offset against (subtracted from) pixel-shift measurements from stationary structures (ie, subcutaneous layers, bone, etc) within the same ultrasound field. This method allows for any slight movement of the ultrasound transducer to be eliminated from the analysis.…”

Section: Imagingmentioning

confidence: 99%

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