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Computed tomography, Scoliosis,

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https://www.readbyqxmd.com/read/28207619/iliac-crest-regeneration-a-retrospective-study-of-14-years-of-follow-up
#1
Anastasios Christodoulou, Achilleas Boutsiadis, Evangellos Christodoulou, Petros Antonarakos, Panagiotis Givissis, Ippokratis Hatzokos
STUDY DESIGN: This is a retrospective study analysis. OBJECTIVE: The purpose of our study was to evaluate the healing process of the ilium after being used as a bone graft donor site in the treatment of adolescent idiopathic scoliosis. SUMMARY OF BACKGROUND DATA: Iliac crest bone grafts have been proven to be the most reliable means for solid fusion in spine surgery. Nevertheless, few reports in the literature describe the ability of the iliac crest to regenerate...
March 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28183004/an-integrative-framework-for-3d-cobb-angle-measurement-on-ct-images
#2
Xing Huo, Jie Qing Tan, Jun Qian, Li Cheng, Jue Hua Jing, Kun Shao, Bing Nan Li
OBJECTIVE: Measuring the Cobb angle on computed tomography (CT) images remains a challenging but requisite task for clinical diagnoses of scoliosis. Traditionally, clinical practitioners resort to manual demarcation, but this approach is inefficient and subjective. Most of the existing computerized algorithms are two-dimensional (2D) and incapable of multi-angle calibration. METHODS: A novel integrative framework based on curvature features and geometric constraints is proposed to measure three-dimensional (3D)Cobb angles on CT images...
January 29, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28120055/restoration-of-thoracolumbar-spine-stability-and-alignment-in-elderly-patients-using-minimally-invasive-spine-surgery-miss-a-safe-and-feasible-option-in-degenerative-and-traumatic-spine-diseases
#3
Giuseppe M V Barbagallo, Giuseppe Raudino, Massimiliano Visocchi, A Abdulrazzaq Alobaid, A Abdulaziz Al-Mutair, Thomas Naveen, Francesco Certo
Minimally invasive spine surgery (MISS), including percutaneous pedicle-screw fixation (PPSF), mini-open transforaminal lumbar interbody fusion (m-open TLIF), vertebroplasty, and stentoplasty, allows the preservation of neurological function and the restoration of spine stability, while reducing associated risks and complications. This study aimed to analyze the safety and efficacy of MISS in elderly patients suffering from degenerative or traumatic thoracolumbar diseases. Forty-five patients (28 females), with a mean age of 73 years (range 65-89), suffering from osteoporotic vertebral fractures (24), degenerative spondylolisthesis (15), and lumbar canal stenosis with instability and/or de novo scoliosis (6) were included...
2017: Acta Neurochirurgica. Supplement
https://www.readbyqxmd.com/read/28107246/reliability-and-usefulness-of-intraoperative-3-dimensional-imaging-by-mobile-c-arm-with-flat-panel-detector
#4
Takahito Fujimori, Motoki Iwasaki, Yukitaka Nagamoto, Masafumi Kashii, Masaki Takao, Tsuyoshi Sugiura, Hideki Yoshikawa
STUDY DESIGN: Reliability and agreement study. OBJECTIVE: To assess the reliability of intraoperative 3-dimensional imaging with a mobile C-arm (3D C-arm) equipped with a flat-panel detector. SUMMARY OF BACKGROUND DATA: Pedicle screws are widely used in spinal surgery. Postoperative computed tomography (CT) is the most reliable method to detect screw misplacement. Recent advances in imaging devices have enabled surgeons to acquire 3D images of the spine during surgery...
February 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28054655/unique-local-bone-tissue-characteristics-in-iliac-crest-bone-biopsy-from-adolescent-idiopathic-scoliosis-with-severe-spinal-deformity
#5
Zhiwei Wang, Huanxiong Chen, Y Eric Yu, Jiajun Zhang, Ka-Yee Cheuk, Bobby K W Ng, Yong Qiu, X Edward Guo, Jack C Y Cheng, Wayne Y W Lee
Adolescent idiopathic scoliosis is a complex disease with unclear etiopathogenesis. Systemic and persistent low bone mineral density is an independent prognostic factor for curve progression. The fundamental question of how bone quality is affected in AIS remains controversy because there is lack of site-matched control for detailed analysis on bone-related parameters. In this case-control study, trabecular bone biopsies from iliac crest were collected intra-operatively from 28 severe AIS patients and 10 matched controls with similar skeletal and sexual maturity, anthropometry and femoral neck BMD Z-score to control confounding effects...
January 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/27991528/prognostic-value-of-bone-mineral-density-on-curve-progression-a-longitudinal-cohort-study-of-513-girls-with-adolescent-idiopathic-scoliosis
#6
Benjamin Hon Kei Yip, Fiona Wai Ping Yu, Zhiwei Wang, Vivian Wing Yin Hung, Tsz Ping Lam, Bobby Kin Wah Ng, Feng Zhu, Jack Chun Yiu Cheng
Osteopenia has been found to occur in about 30% of Adolescent Idiopathic Scoliosis (AIS) patients. This study aimed to investigate its prognostic value on the risk of curve progression to surgical threshold. Newly diagnosed AIS girls (N = 513) with Cobb angle 10°-40° were recruited with follow-up till maturity. Bilateral hips were assessed with dual-energy x-ray absorptiometry (DXA). Distal radius of a subgroup of 90 subjects was further assessed with high-resolution peripheral quantitative computed tomography (HR-pQCT)...
December 19, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27927501/morphometric-analysis-of-the-thoracic-intervertebral-foramen-osseous-anatomy-in-adolescent-idiopathic-scoliosis-using-low-dose-computed-tomography
#7
Thorbjorn J Loch-Wilkinson, Maree T Izatt, Robert D Labrom, Geoffrey N Askin, Mark J Pearcy, Clayton J Adam
PURPOSE: The dimensions of the thoracic intervertebral foramen in adolescent idiopathic scoliosis (AIS) have not previously been quantified. Better understanding of the dimensions of the foramen may be useful in surgical planning. This study describes a reproducible method for measurement of the thoracic foramen in AIS using computed tomography (CT). METHODS: In 23 preoperative female patients with Lenke 1 type AIS with right-side convexity major curves confined to the thoracic spine the foraminal height (FH), foraminal width (FW), pedicle to superior articular process distance (P-SAP), and cross-sectional foraminal area (FA) were measured using multiplanar reconstructed CT...
May 2016: Spine Deformity
https://www.readbyqxmd.com/read/27921155/comparison-of-two-and-three-dimensional-measurement-of-the-cobb-angle-in-scoliosis
#8
Ricarda Lechner, David Putzer, Dietmar Dammerer, Michael Liebensteiner, Christian Bach, Martin Thaler
PURPOSE: The Cobb angle as an objective measure is used to determine the progression of deformity, and is the basis in the planning of conservative and surgical treatment. However, studies have shown that the Cobb angle has two limitations: an inter- and intraobserver variability of the measurement is approximately 3-5 degrees, and high variability regarding the definition of the end vertebra. Scoliosis is a three-dimensional (3D) pathology, and 3D pathologies cannot be completely assessed by two-dimensional (2D) methods, like 2D radiography...
December 5, 2016: International Orthopaedics
https://www.readbyqxmd.com/read/27893671/scoliosis-secondary-to-lumbar-osteoid-osteoma-a-case-report-of-delayed-diagnosis-and-literature-review
#9
REVIEW
Haiping Zhang, Xingbang Niu, Biao Wang, Simin He, Dingjun Hao
RATIONALE: Lumbar osteoid osteoma has a low incidence, which could easily lead to scoliosis. PATIENT CONCERNS: Scoliosis secondary to lumbar osteoid osteoma could be easily misdiagnosed when patients do not complain of obvious symptoms. DIAGNOSES: We reported a case of a 9-year-old boy with back deformity that was firstly diagnosed with scoliosis at the local hospital. After prescribed with orthosis, the patient experienced aggravating pain that could not be relieved with painkillers...
November 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27885641/apophyseal-ossification-of-the-iliac-crest-in-forensic-age-estimation-computed-tomography-standards-for-modern-australian-subadults
#10
Nicolene Lottering, Clair L Alston-Knox, Donna M MacGregor, Maree T Izatt, Caroline A Grant, Clayton J Adam, Laura S Gregory
This study contrasts the ontogeny of the iliac crest apophysis using conventional radiography and multislice computed tomography (MSCT), providing probabilistic information for age estimation of modern Australian subadults. Retrospective abdominopelvic MSCT data acquired from 524 Australian individuals aged 7-25 and surveillance radiographs of adolescent idiopathic scoliosis patients included in the Paediatric Spine Research Group Progression Study (n = 531) were assessed. Ossification scoring of pseudo-radiographs and three-dimensional (3D) volume-rendered reconstructions using Risser (1958) quantitative descriptors indicate discrepancies in age estimates, stage allocation, and conflicting morphological progression...
November 25, 2016: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/27879569/the-azygous-vein-is-at-potential-risk-of-injury-from-mal-positioning-of-left-thoracic-pedicle-screw-in-thoracic-adolescent-idiopathic-scoliosis-patients
#11
Jun Jiang, Bang-Ping Qian, Yong Qiu, Bin Wang, Yang Yu, Ze-Zhang Zhu
STUDY DESIGN: A computed tomography (CT) study OBJECTIVE.: To evaluate the changed position of azygous vein in thoracic adolescent idiopathic scoliosis (AIS) patients and to analyze the potential risk of injury of azygous vein from thoracic pedicle screw placement in these patients. SUMMARY OF BACKGROUND DATA: It has been widely recognized that the anatomic positions of structures adjacent to the vertebrae may change in AIS patients. To date, no study had evaluated such change of azygous vein in AIS patients...
November 22, 2016: Spine
https://www.readbyqxmd.com/read/27879512/uhmwpe-sublaminar-wires-in-posterior-spinal-instrumentation-stability-and-biocompatibility-assessment-in-an-ovine-pilot-study
#12
Rob Bogie, Laura Voss, Jacobus J Arts, Arno Lataster, Paul C Willems, Boudewijn Brans, Lodewijk W van Rhijn, Tim J M Welting
STUDY DESIGN: An animal study. OBJECTIVE: To explore ultra-high molecular weight polyethylene (UHMWPE) sublaminar wires in spinal surgery and to assess stability and biocompatibility of the UHMWPE instrumentation in an ovine model. SUMMARY OF BACKGROUND DATA: Sublaminar wiring is a well-established technique in segmental scoliosis surgery. However, during introduction and/or removal of the metal sublaminar wires, neurological problems can occur...
December 2016: Clinical Spine Surgery
https://www.readbyqxmd.com/read/27852501/longitudinal-pilot-analysis-of-radiation-exposure-during-the-course-of-growing-rod-treatment-for-early-onset-scoliosis
#13
Gregory M Mundis, Jeff B Pawelek, Edward K Nomoto, Michael W Hennessy, Burt Yaszay, Behrooz A Akbarnia
STUDY DESIGN: Retrospective consecutive case series. OBJECTIVES: To estimate the amount of ionizing radiation (IR) exposure in growing rod (GR) surgery for early-onset scoliosis. SUMMARY OF BACKGROUND DATA: There is substantial evidence of the health hazards attributed to IR exposure. However, no studies have estimated the amount of IR exposure in GR surgery. MATERIALS AND METHODS: A consecutive single-center series of GR patients were retrospectively reviewed...
January 2016: Spine Deformity
https://www.readbyqxmd.com/read/27777053/are-pedicle-screw-perforation-rates-influenced-by-distance-from-the-reference-frame-in-multi-level-registration-using-a-ct-based-navigation-system-in-the-setting-of-scoliosis
#14
Masashi Uehara, Jun Takahashi, Shota Ikegami, Shugo Kuraishi, Masayuki Shimizu, Toshimasa Futatsugi, Hiroki Oba, Hiroyuki Kato
BACKGROUND CONTEXT: Pedicle screw fixation is commonly employed for the surgical correction of scoliosis but carries a risk of serious neurovascular or visceral structure events during screw insertion. To avoid these complications, we have been using a computed tomography (CT)-based navigation system during pedicle screw placement. As this could also prolong operation time, multi-level registration for pedicle screw insertion for posterior scoliosis surgery was developed to register 3 consecutive vertebrae in a single time with CT-based navigation...
October 21, 2016: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/27733146/plasticity-of-vertebral-wedge-deformities-in-skeletally-immature-patients-with-adolescent-idiopathic-scoliosis-after-posterior-corrective-surgery
#15
Takahiro Makino, Takashi Kaito, Yusuke Sakai, Shota Takenaka, Kazuomi Sugamoto, Hideki Yoshikawa
BACKGROUND: Vertebral bodies in patients with adolescent idiopathic scoliosis (AIS) usually have frontal wedge deformities. However, the plasticity of the deformed vertebrae in skeletally immature patients is unknown. The purpose of our study was to clarify the plasticity of vertebral deformities in skeletally immature patients with AIS by using in vivo three-dimensional (3D) analysis. METHODS: Ten female patients with AIS (mean age, 12.2 years; three patients, Lenke type 1; five patients, type 2; two patients, type 5) who underwent posterior fusion and whose Risser grade was ≤3 at surgery were included...
October 12, 2016: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/27726524/impact-of-scoliosis-on-laparoscopic-nissen-fundoplication
#16
Tetsuya Ishimaru, Masahiko Sugiyama, Mari Arai, Kaori Satoh, Chizue Uotani, Masataka Takahashi, Shohei Takami, Jun Fujishiro, Tadashi Iwanaka
AIM: Scoliosis, which is often associated with neurological impairment in children, sometimes makes it difficult to perform laparoscopic procedures. This study assessed the impact of scoliosis on performing laparoscopic Nissen fundoplication. METHODS: Medical records and radiographic examinations of patients who underwent laparoscopic Nissen fundoplication at a single institution from 2006 to 2015 were reviewed retrospectively. Patients' data on age at surgery, height, weight, duration of pneumoperitoneum, and amount of bleeding were collected...
November 2016: Journal of Laparoendoscopic & Advanced Surgical Techniques. Part A
https://www.readbyqxmd.com/read/27716016/posterior-corrective-surgery-with-a-multilevel-transforaminal-lumbar-interbody-fusion-and-a-rod-rotation-maneuver-for-patients-with-degenerative-lumbar-kyphoscoliosis
#17
Akira Matsumura, Takashi Namikawa, Minori Kato, Tomonori Ozaki, Yusuke Hori, Noriaki Hidaka, Hiroaki Nakamura
The purpose of this study was to assess the clinical results of posterior corrective surgery using a multilevel transforaminal lumbar interbody fusion (TLIF) with a rod rotation (RR) and to evaluate the segmental corrective effect of a TLIF using CT imaging. The medical records of 15 consecutive patients with degenerative lumbar kyphoscoliosis (DLKS) who had undergone posterior spinal corrective surgery using a multilevel TLIF with an RR technique and who had a minimum follow-up of 2 years were retrospectively reviewed...
February 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/27577182/assessment-of-potential-confounders-when-imaging-pectus-excavatum-with-chest-radiography-alone
#18
Michael A McHugh, Patrick M Poston, Nicholas O Rossi, Joseph W Turek
BACKGROUND: Chest radiography (CXR) has emerged as an attractive alternative imaging option for objective pre-operative assessment of pectus excavatum (PE) with comparable accuracy, reduced cost, and less radiation exposure when compared to computed tomography (CT). This study asked whether image quality, scoliosis, and asymmetry of the PE deformity would decrease the accuracy of CXR as compared to CT. METHODS: A database of PE patients receiving preoperative CXR and CT was created, and Haller-indices (HI) and correction-indices (CI) were calculated using each imaging modality...
September 2016: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/27564683/effects-of-multilevel-facetectomy-and-screw-density-on-postoperative-changes-in-spinal-rod-contour-in-thoracic-adolescent-idiopathic-scoliosis-surgery
#19
Terufumi Kokabu, Hideki Sudo, Yuichiro Abe, Manabu Ito, Yoichi M Ito, Norimasa Iwasaki
Flattening of the preimplantation rod contour in the sagittal plane influences thoracic kyphosis (TK) restoration in adolescent idiopathic scoliosis (AIS) surgery. The effects of multilevel facetectomy and screw density on postoperative changes in spinal rod contour have not been documented. This study aimed to evaluate the effects of multilevel facetectomy and screw density on changes in spinal rod contour from before implantation to after surgical correction of thoracic curves in patients with AIS prospectively...
2016: PloS One
https://www.readbyqxmd.com/read/27526652/classification-of-pectus-excavatum-according-to%C3%A2-objective-parameters-from-chest-computed%C3%A2-tomography
#20
Jin-Ho Choi, In Kyu Park, Young Tae Kim, Woo Sun Kim, Chang Hyun Kang
BACKGROUND: Previous classification systems of pectus excavatum have been based on subjective morphologic characteristics. We sought to suggest a new classification system derived from objective variables. METHODS: Patients who underwent surgical repair of pectus excavatum without a history of previous chest operations were included. Objective morphologic variables were measured from chest computed tomography scan images, and classification was performed by hierarchical clustering of measured indexes...
December 2016: Annals of Thoracic Surgery
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