Reliability and accuracy of ultrasound measurements with and without the aid of previous radiographs in adolescent idiopathic scoliosis (AIS)

Young, Michelle; Hill, Douglas L.; Zheng, Rui; Lou, Edmond

doi:10.1007/s00586-015-3855-8

Cited by 62 publications

(41 citation statements)

References 22 publications

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“…For ultrasound assessments, the reconstructed 3-D ultrasound images of vertebra were shown in the 3 orthogonal planes (coronal, sagittal and transverse) ( Fig 2 ). The center of laminar (COL) method was applied to measure the spinal curvature angle in the coronal plane [ 15 , 23 , 24 ]. The laminae at each vertebral level were identified manually in the coronal plane of ultrasound image.…”

Section: Methodsmentioning

confidence: 99%

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Reliability and Validity Study of Clinical Ultrasound Imaging on Lateral Curvature of Adolescent Idiopathic Scoliosis

Wang

Lou

et al. 2015

PLoS ONE

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BackgroundNon-ionizing radiation imaging assessment has been advocated for the patients with adolescent idiopathic scoliosis (AIS). As one of the radiation-free methods, ultrasound imaging has gained growing attention in scoliosis assessment over the past decade. The center of laminae (COL) method has been proposed to measure the spinal curvature in the coronal plane of ultrasound image. However, the reliability and validity of this ultrasound method have not been validated in the clinical setting.ObjectivesTo evaluate the reliability and validity of clinical ultrasound imaging on lateral curvature measurements of AIS with their corresponding magnetic resonance imaging (MRI) measurements.MethodsThirty curves (ranged 10.2°–68.2°) from sixteen patients with AIS were eligible for this study. The ultrasound scan was performed using a 3-D ultrasound unit within the same morning of MRI examination. Two researchers were involved in data collection of these two examinations. The COL method was used to measure the coronal curvature in ultrasound image, compared with the Cobb method in MRI. The intra- and inter-rater reliability of the COL method was evaluated by intra-class correlation coefficient (ICC). The validity of this method was analyzed by paired Student’s t-test, Bland–Altman statistics and Pearson correlation coefficient. The level of significance was set as 0.05.ResultsThe COL method showed high intra- and inter-rater reliabilities (both with ICC (2, K) >0.9, p<0.05) to measure the coronal curvature. Compared with Cobb method, COL method showed no significant difference (p<0.05) when measuring coronal curvature. Furthermore, Bland-Altman method demonstrated an agreement between these two methods, and Pearson’s correlation coefficient (r) was high (r>0.9, p<0.05).ConclusionThe ultrasound imaging could provide a reliable and valid measurement of spinal curvature in the coronal plane using the COL method. Further research is needed to validate the proposed ultrasound measurement in larger clinical trial and to optimize the ultrasound scanning and measuring procedure.

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Section: Methodsmentioning

confidence: 99%

“…The intra- and inter-reliability of the COL method was showed to be high for the patients with AIS ranged from 12° to 45°. Furthermore, the correlation was found between the COL method in ultrasound and the Cobb method in radiograph [ 23 , 24 ]; the measurement difference between these two methods was less than 5° [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Reliability and Validity Study of Clinical Ultrasound Imaging on Lateral Curvature of Adolescent Idiopathic Scoliosis

Wang

Lou

et al. 2015

PLoS ONE

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“…Recently, Chen et al [16,17] validated that upright ultrasound spine images could be obtained and the center of lamina (COL) method using the ultrasound images provided both Cobb angle and AVR measurements. The Cobb angle validation studies were reported [18,19]. The purpose of this study was to determine the intra-and inter-observer reliability of the AVR measurements on both in vitro and in vivo studies.…”

Section: Introductionmentioning

confidence: 99%

Reliability of the axial vertebral rotation measurements of adolescent idiopathic scoliosis using the center of lamina method on ultrasound images: in vitro and in vivo study

Chen

Lou

2016

Eur Spine J

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“…Recently, it has also emerged as a useful, low cost tool for applications that involve imaging bone structures such as guidance for epidural anesthesia (Ashab et al, 2013), bone fracture assessment (Haci-haliloglu et al, 2009) and scoliosis assessment and monitoring (Young et al, 2015;Ungi et al, 2014). However, the interpretation of bone ultrasound images is very challenging.…”

Section: Introductionmentioning

confidence: 99%

“…Potential applications include deformity assessment (Ungi et al, 2014;Cheung et al, 2015;Young et al, 2015), spinal brace adjustment Li et al, 2012) and dense 3D spine surface reconstruction (Nguyen et al, 2015). The current gold standard measure for assessing scoliosis (as well as its progression or the effectiveness of a treatment) is the Cobb angle, measured on postero-anterior X-ray images.…”

Section: Introductionmentioning

confidence: 99%

Segmentation of the spinous process and its acoustic shadow in vertebral ultrasound images

Berton

Cheriet

Marie-Claude

et al. 2016

Computers in Biology and Medicine

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Spinal ultrasound imaging is emerging as a low-cost, radiation-free alternative to conventional X-ray imaging for the clinical follow-up of patients with scoliosis. Currently, deformity measurement relies almost entirely on manual identification of key vertebral landmarks. However, the interpretation of vertebral ultrasound images is challenging, primarily because acoustic waves are entirely reflected by bone. To alleviate this problem, we propose an algorithm to segment these images into three regions: the spinous process, its acoustic shadow and other tissues. This method consists, first, in the extraction of several image features and the selection of the most relevant ones for the discrimination of the three regions. Then, using this set of features and a LDA classifier, each pixel of the image is classified as belonging to one of the three * Corresponding author Email addresses: florian.berton@polymtl.ca (Florian Berton), farida.cheriet@polymtl.ca (Farida Cheriet), marie-claude_miron@ssss.gouv.qc.ca regions. Finally, the image is segmented by regularizing the pixel-wise classification results to account for some geometrical properties of vertebrae. The feature set was first validated by analyzing the classification results across a learning database. The database contained 107 vertebral ultrasound images acquired with convex and linear probes. Classification rates of 84%, 92% and 91% were achieved for the spinous process, the acoustic shadow and other tissues, respectively. Dice similarity coefficients of 0.72 and 0.88 were obtained respectively for the spinous process and acoustic shadow, confirming that the proposed method accurately segments the spinous process and its acoustic shadow in vertebral ultrasound images. Furthermore, the centroid of the automatically segmented spinous process was located at an average distance of 0.38 mm from that of the manually labeled spinous process, which is on the order of image resolution. This suggests that the proposed method is a promising tool for the measurement of the Spinous Process Angle and, more generally, for assisting ultrasound-based assessment of scoliosis progression.

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Reliability and accuracy of ultrasound measurements with and without the aid of previous radiographs in adolescent idiopathic scoliosis (AIS)

Cited by 62 publications

References 22 publications

Reliability and Validity Study of Clinical Ultrasound Imaging on Lateral Curvature of Adolescent Idiopathic Scoliosis

Reliability and Validity Study of Clinical Ultrasound Imaging on Lateral Curvature of Adolescent Idiopathic Scoliosis

Reliability of the axial vertebral rotation measurements of adolescent idiopathic scoliosis using the center of lamina method on ultrasound images: in vitro and in vivo study

Segmentation of the spinous process and its acoustic shadow in vertebral ultrasound images

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