Image Distortion in Biplanar Slot Scanning: Part 2 Technology-specific Factors

Conclusions: This study demonstrates that there is minimal error due to image acquisition and measurement when using a biplanar slot scanner. Biplanar slot scanning technology tended to underestimate the size of the marker; however, the least accurate measurements only erred by 1.5% from the true length. This indicates that unlike traditional radiographs the sources of error in biplanar slot scanning images are not due to parallax and are likely due to patient-specific factors and rather than the technology itself.
Source: Journal of Pediatric Orthopaedics - Category: Orthopaedics Tags: Scioliosis/Kyphosis Source Type: research

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Abstract Back pain is a relatively common presenting symptom in children and adolescents. Typical causes include muscle strain or spasm, spinal deformities (e.g., Scheuermann kyphosis, adolescent idiopathic scoliosis), spondylolysis, bulging or herniated intervertebral disks, apophysitis of the iliac crest, and functional pain syndromes such as fibromyalgia. Spondyloarthropathies such as ankylosing spondylitis may present with low back pain and stiffness, which are often worse in the morning. Less common but more serious causes include malignancy and infections. The physical examination should include postural ins...
Source: American Family Physician - Category: Primary Care Authors: Tags: Am Fam Physician Source Type: research
Conclusion: The surgical correction of patients having spinal deformity associated with NF-1 is challenging, however the radiographic and clinical outcomes are satisfactory. The all posterior approach can be a safe and effective surgical option for patients having dystrophic curves associated with NF-1. PMID: 32512989 [PubMed - as supplied by publisher]
Source: Journal of Korean Neurosurgical Society - Category: Neurosurgery Tags: J Korean Neurosurg Soc Source Type: research
Publication date: Available online 13 March 2020Source: Journal of Clinical NeuroscienceAuthor(s): Masaaki Machino, Noriaki Kawakami, Tetsuya Ohara, Toshiki Saito, Ryoji Tauchi, Shiro Imagama
Source: Journal of Clinical Neuroscience - Category: Neuroscience Source Type: research
AbstractPurposeTo investigate whether the rotation of preoperative-presumed lowest instrumented vertebra (LIV) is a risk factor for adding-on (AO) in adolescent idiopathic scoliosis (AIS) treated with selective posterior thoracic fusion (sPTF).MethodsA total of 196 AIS patients of Lenke type 1A or 2A with minimum 2-year follow-up after sPTF with all pedicle screw instrumentation were included. Radiographical parameters were measured as follows: preoperative rotation angle of presumed LIV and LIV  + 1, LIV + 1/LIV rotation difference, postoperative rotation angle of LIV and LIV derotation angle o...
Source: European Spine Journal - Category: Orthopaedics Source Type: research
Abstract OBJECTIVE: Achieving fusion at the lumbosacral junction poses many technical challenges. No data exist in the literature comparing radiographic or clinical outcomes between the different surgical techniques of transsacral fixation (TSF) with rods and transforaminal lumbar interbody fusion (TLIF) in conjunction with iliac fixation. The purpose of this study was to compare the clinical outcomes and radiographic fusions of TSF to TLIF in patients with adult spinal deformity undergoing long fusions across the lumbosacral junction. METHODS: Patients with primary adult spinal deformity who underwent long f...
Source: Journal of Neurosurgery.Spine - Category: Neurosurgery Authors: Tags: J Neurosurg Spine Source Type: research
Study Design. A retrospective study. Objective. The purpose of this study was to evaluate the morphology of rib regeneration and to analyze the influence of demographics and curve characteristics on regeneration potential after thoracoplasty in the treatment of adolescent idiopathic scoliosis (AIS). Summary of Background Data. Studies on the physiological effects after thoracoplasty have been performed for several decades. However, rib cage anatomical regeneration patterns and reformation have been rarely studied. Methods. A total of 120 AIS patients who underwent thoracoplasty with deformity correction were inc...
Source: Spine - Category: Orthopaedics Tags: DEFORMITY Source Type: research
In conclusion, we have developed an accurate and valid automated method for identifying and quantifying spinal curvature from total body DXA scans.
Source: Calcified Tissue International - Category: Orthopaedics Source Type: research
Conclusion: The 3D finite element model based on 3D finite element software was highly efficient, and its numerical simulation was accurate, which was important for the subsequent biomechanical analysis of PVCR orthopaedy. In addition, the vertebral stress of PVCR orthopaedy was different in each body part, which was mainly affected by the applied orthodontic force and the sites of the orthodontic area.
Source: Saudi Journal of Biological Sciences - Category: Biology Source Type: research
Adolescent idiopathic scoliosis (AIS) is a spinal deformity that can affect young children. It requires frequent exposure to X-rays to monitor the deformity, which can lead to the development of radiation-induced cancer later in life. The aim of this study is to test the accuracy of using scan projection radiography (SPR) in computed tomography (CT) scans for AIS assessment. This scanning mode delivers low radiation compared with conventional radiography.
Source: Radiography - Category: Radiology Authors: Source Type: research
Study Design. Retrospective study. Objective. To describe surgical results in two and three dimensions and patient-reported outcomes of scoliosis treatment for Lenke type 1 idiopathic curves with an open anterior or posterior approach. Summary of Background Data. Different surgical techniques have been described to prevent curve progression and to restore spinal alignment in idiopathic scoliosis. The spine can be accessed via an anterior or a posterior approach. However, the surgical outcomes, especially in three dimensions, for different surgical approaches remain unclear. Methods. Cohorts of Lenke curve type 1...
Source: Spine - Category: Orthopaedics Tags: DEFORMITY Source Type: research
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