P181. A Comparison Study Between X-ray and CT in Evaluating Indirect Reduction of Spinal Canal Bone Fragment

TiO2 modified Fe3O4 nanocomposite as photocatalyst in CO2 indirect reduction was synthesized by an ultrasonic-assisted sol-gel method and its photocatalytic activity was studied as well. The modification of the TiO2 composite was attempted to modify titanium dioxide to have better performance as a photocatalyst. Magnetite synthesis was carried out by the sono-coprecipitation method with the addition of the capping agent. The magnetite was coated with TiO2 via the sol-gel method under ultrasonic irradiation. The products were characterized by X-ray diffraction (XRD), Fourier transforms infrared spectrophotometry (FT-IR), transmission electron microscopy (TEM), and turbidimetry. The final product was also analyzed by diffuse reflectance UV-Visible (DR-UV) and scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX). The product of indirect reduction was analyzed by gas chromatography-mass spectrometry (GC-MS). Photocatalytic reaction with Fe3O4/TiO2 nanocomposite produced a higher concentration of methanol than using TiO2. Methanol concentration produced from the photocatalytic reaction using TiO2 and Fe3O4/TiO2 was 6.63% and 16.82%.

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Analysis of factors influencing the mapping accuracy of x-ray and laser range images in a bone fragment Detection System

10.13031/2013.15422 ◽

2013 ◽

Author(s):

HANSONG JING ◽

XIN CHEN ◽

YANG TAO

Keyword(s):

Detection System ◽

Range Images ◽

Bone Fragment ◽

Mapping Accuracy ◽

Laser Range ◽

X Ray ◽

Factors Influencing

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Outcomes of computer-assisted peri-acetabular osteotomy compared with conventional osteotomy in hip dysplasia

International Orthopaedics ◽

10.1007/s00264-020-04578-x ◽

2020 ◽

Vol 44 (6) ◽

pp. 1055-1061 ◽

Cited By ~ 3

Author(s):

Hiroshi Imai ◽

Tomomi Kamada ◽

Joji Miyawaki ◽

Akira Maruishi ◽

Naohiko Mashima ◽

...

Keyword(s):

Hip Dysplasia ◽

Lateral Displacement ◽

Japanese Orthopaedic Association ◽

Computer Assisted ◽

Bone Fragment ◽

Target Zone ◽

3D Navigation ◽

X Ray ◽

Improved Accuracy

Abstract Aim of the study To compare the outcomes after computer-assisted peri-acetabular osteotomy (PAO) and conventional PAO performed for hip dysplasia (DDH). Methods Ninety-one patients (98 hips) were enrolled in this study. In each case, DDH was treated with either conventional PAO, in which the angle and direction of the osteotomy was determined by intra-operative X-ray examination, or with computer-assisted PAO, which used the 3D navigation system. Forty hips underwent conventional PAO and 58 hips underwent computer-assisted PAO. Results Japanese Orthopaedic Association hip scores improved significantly from 70.0 points pre-operatively to 90.7 points post-operatively in patients with conventional PAO, and from 74.5 points pre-operatively to 94.2 points post-operatively in patients with computer-assisted PAO. In all patients with computer-assisted PAO, the post-operative AHI and VCA angle were within the radiographic target zone. Some patients with conventional PAO had post-operative AHI and VCA angle outside of the target zone. We performed total hip arthroplasty (THA) on five of the 98 PAO hips (5.1%) after an average follow-up period of 5.4 years. None of 58 hips (0%) with computer-assisted PAO was revised. Discussion Computer-assisted PAO enabled intra-operative confirmation of osteotomy sites, and the position of the osteotomized bone fragment could be confirmed in real time. Adequate anterior and lateral coverage of the femoral head in patients with computer-assisted PAO resulted in no need for early conversion to THA, in contrast to conventional PAO. Conclusion Computer-assisted PAO not only improved accuracy and safety but also achieved sufficient anterior and lateral displacement to prevent the progression of DDH.

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Comparison study of outer valence levels in phenyl and pentafluorophenyl derivatives of divalent sulfur by photoelectron and x-ray fluorescence spectroscopy

Bulletin of the Academy of Sciences of the USSR Division of Chemical Science ◽

10.1007/bf00950282 ◽

1981 ◽

Vol 30 (6) ◽

pp. 1006-1013

Author(s):

B. G. Zykov ◽

S. A. Krupoder ◽

G. N. Dolenko ◽

G. G. Furin ◽

V. I. Khvostenko ◽

...

Keyword(s):

Fluorescence Spectroscopy ◽

Comparison Study ◽

X Ray ◽

Derivatives Of ◽

Outer Valence ◽

Divalent Sulfur

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Cervical myelopathy caused by developmental stenosis of the spinal canal

Journal of Neurosurgery ◽

10.3171/jns.1979.51.3.0362 ◽

1979 ◽

Vol 51 (3) ◽

pp. 362-367 ◽

Cited By ~ 54

Author(s):

Joseph A. Epstein ◽

Robert Carras ◽

Roger A. Hyman ◽

Sergio Costa

Keyword(s):

Spinal Canal ◽

Cervical Spondylotic Myelopathy ◽

Transverse Plane ◽

Intramedullary Tumor ◽

Neural Arch ◽

Decompressive Laminectomy ◽

Content Type ◽

Significant Evidence ◽

X Ray ◽

Fine Print

✓ The authors present six patients with myelopathy caused by developmental stenosis of the cervical spine. Hyperextension injuries precipitated the onset of symptoms in two patients, aged 19 and 20 years. In four, 41 to 69 years of age, symptoms were gradual in onset, progressing to severe disability. X-ray films revealed narrowing of the dorsoventral diameter of the spinal canal to as little as 1.0 cm. The myelograms showed widening of the cord in the transverse plane strongly suggestive of an intramedullary tumor. A unique finding was maldevelopment with flattening of the neural arch often hidden by the posterior portions of the articular facets when seen in the lateral views. These patients showed no significant evidence of spondylosis, arthrosis, or any of the structural stigmata usually observed in cervical spondylotic myelopathy. When indicated, decompressive laminectomy is the treatment of choice.

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