Curve correction of vehicle‐integrated photovoltaics using statistics on commercial car bodies

2021 ◽  
Author(s):  
Yasuyuki Ota ◽  
Kenji Araki ◽  
Akira Nagaoka ◽  
Kensuke Nishioka
Keyword(s):  
Curve Correction

Interactive Image Quality Enhancement Support System by Tone Curve Correction Based on Human KANSEI

2009 ◽  
Vol 129 (6) ◽  
pp. 593-600 ◽  
Author(s):  
Yuichiro Tokuda ◽  
Gosuke Ohashi ◽  
Masato Tsukada ◽  
Reiichi Kobayashi ◽  
Yoshifumi Shimodaira
Keyword(s):  
Image Quality ◽  
Support System ◽  
Quality Enhancement ◽  
Curve Correction ◽  
Image Quality Enhancement

The impact of increasing interbody fusion levels at the fractional curve on lordosis, curve correction, and complications in adult patients with scoliosis

2020 ◽  
pp. 1-10
Author(s):  
Dominic Amara ◽  
Praveen V. Mummaneni ◽  
Shane Burch ◽  
Vedat Deviren ◽  
Christopher P. Ames ◽  
...  
Keyword(s):  
Postoperative Complications ◽  
Revision Surgery ◽  
Lumbar Lordosis ◽  
Interbody Fusion ◽  
Pelvic Incidence ◽  
Secondary Analysis ◽  
Lumbar Interbody Fusion ◽  
Curve Correction ◽  
Surgery Rates

OBJECTIVERadiculopathy from the fractional curve, usually from L3 to S1, can create severe disability. However, treatment methods of the curve vary. The authors evaluated the effect of adding more levels of interbody fusion during treatment of the fractional curve.METHODSA single-institution retrospective review of adult patients treated for scoliosis between 2006 and 2016 was performed. Inclusion criteria were as follows: fractional curves from L3 to S1 > 10°, ipsilateral radicular symptoms concordant on the fractional curve concavity side, patients who underwent at least 1 interbody fusion at the level of the fractional curve, and a minimum 1-year follow-up. Primary outcomes included changes in fractional curve correction, lumbar lordosis change, pelvic incidence − lumbar lordosis mismatch change, scoliosis major curve correction, and rates of revision surgery and postoperative complications. Secondary analysis compared the same outcomes among patients undergoing posterior, anterior, and lateral approaches for their interbody fusion.RESULTSA total of 78 patients were included. There were no significant differences in age, sex, BMI, prior surgery, fractional curve degree, pelvic tilt, pelvic incidence, pelvic incidence − lumbar lordosis mismatch, sagittal vertical axis, coronal balance, scoliotic curve magnitude, proportion of patients undergoing an osteotomy, or average number of levels fused among the groups. The mean follow-up was 35.8 months (range 12–150 months). Patients undergoing more levels of interbody fusion had more fractional curve correction (7.4° vs 12.3° vs 12.1° for 1, 2, and 3 levels; p = 0.009); greater increase in lumbar lordosis (−1.8° vs 6.2° vs 13.7°, p = 0.003); and more scoliosis major curve correction (13.0° vs 13.7° vs 24.4°, p = 0.01). There were no statistically significant differences among the groups with regard to postoperative complications (overall rate 47.4%, p = 0.85) or need for revision surgery (overall rate 30.7%, p = 0.25). In the secondary analysis, patients undergoing anterior lumbar interbody fusion (ALIF) had a greater increase in lumbar lordosis (9.1° vs −0.87° for ALIF vs transforaminal lumbar interbody fusion [TLIF], p = 0.028), but also higher revision surgery rates unrelated to adjacent-segment pathology (25% vs 4.3%, p = 0.046). Higher ALIF revision surgery rates were driven by rod fracture in the majority (55%) of cases.CONCLUSIONSMore levels of interbody fusion resulted in increased lordosis, scoliosis curve correction, and fractional curve correction. However, additional levels of interbody fusion up to 3 levels did not result in more postoperative complications or morbidity. ALIF resulted in a greater lumbar lordosis increase than TLIF, but ALIF had higher revision surgery rates.

Supine Traction Versus Prone Bending Radiographs for Assessing the Curve Flexibility in Spinal Deformity

2021 ◽  
pp. 219256822097913
Author(s):  
Niek te Hennepe ◽  
Maarten Spruit ◽  
Martin H. Pouw ◽  
Marco Hinderks ◽  
Petra Heesterbeek
Keyword(s):  
Idiopathic Scoliosis ◽  
Spinal Deformity ◽  
Retrospective Cohort ◽  
De Novo ◽  
Traction Force ◽  
Degenerative Lumbar Scoliosis ◽  
Curve Correction ◽  
Subgroup Analyses ◽  
The Difference ◽  
Side Bending

Study Design: Retrospective cohort study. Objectives: No consensus exists among surgeons on which radiologic method to prefer for the assessment of curve flexibility in spinal deformity. The objective of this study was to evaluate the difference in curve correction on supine traction radiographs versus prone side bending radiographs. Methods: A retrospective analysis of idiopathic scoliosis (IS), degenerative idiopathic scoliosis (DIS) and de novo degenerative lumbar scoliosis (DNDLS) patients was performed on supine traction as well as prone bending films (when available). Age, weight, traction force, diagnosis and Cobb angles of the primary and secondary curves were extracted. Differences in curve correction (percentages) on traction versus prone bending radiographs were analyzed for the primary and secondary curve. Subgroup analyses were performed for the 3 different diagnoses. Results: In total, 170 patients were eligible for inclusion. 43 were diagnosed with IS, 58 with DIS and 69 with DNDLS. For the primary curve, greater curve correction was obtained with bending in the DNDLS group ( P < 0.001). In the DIS group, there was a trend toward more correction on bending ( P = 0.054). In de IS group no difference was found. For the secondary curve, bending showed more curve correction in the IS and DIS group ( P = 0.002 and P <0.001). No difference was found in the DNDLS group. Conclusion: Compared to traction radiographs, bending radiographs better serve the purpose of curve flexibility assessment of IS, DIS and DNDLS spinal deformity, despite the fact that patients are exposed to more radiation.

P83. Fractional curve correction using TLIF vs ALIF in adult scoliosis

2021 ◽  
Vol 21 (9) ◽  
pp. S180
Author(s):  
Thomas Buell ◽  
Christopher I. Shaffrey ◽  
Shay Bess ◽  
Han Jo Kim ◽  
Eric O. Klineberg ◽  
...  
Keyword(s):  
Adult Scoliosis ◽  
Curve Correction

What happens to the unfused upper thoracic curve after posterior spinal fusion for adolescent idiopathic scoliosis?

2021 ◽  
pp. 1-7
Author(s):  
M. Omar Iqbal ◽  
Amer F. Samdani ◽  
Joshua M. Pahys ◽  
Peter O. Newton ◽  
Suken A. Shah ◽  
...  
Keyword(s):  
Adolescent Idiopathic Scoliosis ◽  
Idiopathic Scoliosis ◽  
Univariate Analysis ◽  
Posterior Spinal Fusion ◽  
Research Society ◽  
Curve Correction ◽  
Scoliosis Research Society ◽  
Lenke Classification ◽  
Upper Instrumented Vertebra ◽  
Upper Thoracic

OBJECTIVE Spontaneous lumbar curve correction after selective thoracic fusion in surgery for adolescent idiopathic scoliosis (AIS) is well described. However, only a few articles have described the course of the uninstrumented upper thoracic (UT) curve after fusion, and the majority involve a hybrid construct. In this study, the authors sought to determine the outcomes and associated factors of uninstrumented UT curves in patients with AIS. METHODS The authors retrospectively reviewed a prospectively collected multicenter AIS registry for all consecutive patients with Lenke type 1–4 curves with a 2-year minimum follow-up. UT curves were considered uninstrumented if the upper instrumented vertebra (UIV) did not extend above 1 level from the lower end vertebra of the UT curve. The authors defined progression as > 5°, and divided patients into two cohorts: those with improvement in the UT curve (IMP) and those without improvement in the UT curve (NO IMP). Radiographic, demographic, and Scoliosis Research Society (SRS)–22 survey outcome measures were compared using univariate analysis, and significant factors were compared using a multivariate regression model. RESULTS The study included 450 patients (370 females and 80 males). The UT curve self-corrected in 86% of patients (n = 385), there was no change in 14% (n = 65), and no patients worsened. Preoperatively, patients were similar with respect to Lenke classification (p = 0.44), age (p = 0.31), sex (p = 0.85), and Risser score (p = 0.14). The UT curves in the IMP group self-corrected from 24.7° ± 6.5° to 12.6° ± 5.9°, whereas in the NO IMP group UT curves remained the same, from 20.3° ± 5.8° to 18.5° ± 5.7°. In a multivariate analysis, preoperative main thoracic (MT) curve size (p = 0.004) and MT curve correction (p = 0.001) remained significant predictors of UT curve improvement. Greater correction of the MT curve and larger initial MT curve size were associated with greater likelihood of UT curve improvement. CONCLUSIONS Spontaneous UT curve correction occurred in the majority (86%) of unfused UT curves after MT curve correction in Lenke 1–4 curve types. The magnitude of preoperative MT curve size and postoperative MT curve correction were independent predictors of spontaneous UT curve correction.

scholarly journals Photoconverter heating by incident radiation: Overheat temperature and IV-curve correction

2018 ◽  
Author(s):  
Mikhail Mintairov ◽  
Valery Evstropov ◽  
Sergey Mintairov ◽  
Maxim Shvarts ◽  
Nikolay Kalyuzhnyy
Keyword(s):  
Incident Radiation ◽  
Curve Correction

scholarly journals EXPERIENCE OF HALOPELVIC TRACTION IN THE TREATMENT OF SEVERE SPINE DEFORMITY: A CASE SERIES

2016 ◽  
Vol 21 (4) ◽  
pp. 295
Author(s):  
Syed Asif Ali ◽  
Asad Ali Ch ◽  
Ahmad Sarfraz Humayun ◽  
Usman Zafar Dar ◽  
Syed Muhammad Awais
Keyword(s):  
Treatment Outcome ◽  
Case Series ◽  
Descriptive Study ◽  
Spine Deformity ◽  
Operative Techniques ◽  
Curve Correction ◽  
Severe Scoliosis ◽  
Traction Device ◽  
Medical University ◽  
Severe Spinal Deformity

AbstractBackground:Severe and rigid scoliosis and kyphosis are difficult to treat but with the advent of new spinal operative techniques and implants, it has become man-ageable in expert hands. However these implants are too expensive for developing countries like us. The Halo-pelvic traction is a relatively cheaper device sys-tem used to treat such deformities. Moreover, rapid curve correction and one stage surgery may lead to permanent neurological deficit.Objective:To evaluate treatment outcome of Halo-pelvic Traction in the treatment of severe scoliosis and kyphosis.Methodology:This descriptive study was conducted in the department of Orthopedics surgery and traumatology unit I, King Edward Medical University, Mayo Hospital Lahore from September 2010 to August 2012. The patients with severe spinal deformity which could not be corrected at a single stage were included. A Performa was made for each patient and results were statistically analyzed by using SPSS version 20.Results:Total no. of 07 patients were treated, out of them 04 scoliosis patients having mean Cobbs angle of 77.25 5.31 before treatment, improved significantly to 45 5.35 after surgery (p?0.0001), 03 kyphosis patients with mean Kyphus angle of 96.67 24.66 improved to 58.33 17.56 (p?0.0001). Two major complications i.e. one paraplegia which recovered incompletely and one had CSF discharge from cranial pin that was also revived thoroughly after changing the position of the pin.Conclusion:Halopelvic traction device can help in treating the patients of severe scoliosis and kyphosis.Keywords:Kyphosis, Halo-Pelvic, Kyphus angle, Cobbs angle.

Does Higher Anchor Density Result in Increased Curve Correction and Improved Clinical Outcomes in Adolescent Idiopathic Scoliosis?

Spine ◽  
2014 ◽  
Vol 39 (7) ◽  
pp. 571-578 ◽  
Author(s):  
A. Noelle Larson ◽  
David W. Polly ◽  
Beverly Diamond ◽  
Charles Ledonio ◽  
B. Stephens Richards ◽  
...  
Keyword(s):  
Adolescent Idiopathic Scoliosis ◽  
Idiopathic Scoliosis ◽  
Clinical Outcomes ◽  
Curve Correction ◽  
Density Result
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