scholarly journals Accuracy of MRI and X‐Ray Measurement of Displacement Distance of Humeral Lateral Condyle Fractures

2021 ◽  
Author(s):  
Lin Guo ◽  
Xiaofeng Li ◽  
Zhi Wang ◽  
Shan Zhu
Keyword(s):  
Lateral Condyle ◽  
X Ray

scholarly journals Image Fusion of X-ray and Magnetic Resonance Imaging-Based Evaluation of the Stability of Pediatric Lateral Humeral Condyle Fracture

2021 ◽  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Lateral Condyle ◽  
Resonance Imaging ◽  
Condylar Fracture ◽  
X Ray ◽  
Fracture Displacement ◽  
The Stability ◽  
Condyle Fracture ◽  
Humeral Condyle

Background: Lateral humeral condyle fracture is the second most common intra-articular fracture in pediatric elbow. Objectives: The present study aimed to analyze the differences between X-ray and magnetic resonance imaging (MRI) in the evaluation of the stability of pediatric lateral humeral condyle fracture and the degree of fracture displacement. Methods: A total of 78 patients with acute elbow trauma were selected and hospitalized in our orthopedic department from July 2018-July 2019. All patients were examined with X-ray and MRI. The sensitivity and specificity of X-ray and MRI in the diagnosis of lateral humeral condyle fracture and the integrity of the trochlear cartilage chain fracture were calculated. The X-ray and MRI were examined respectively to check the value of lateral and posterior fracture space of lateral humeral condyle fracture. Results: Callus repair was observed according to the observation of fracture line during operation or the follow-up imaging examination of conservative treatment. It was confirmed that out of 78 patients with elbow joint trauma, 72 cases were diagnosed with the fracture of lateral condyle of humerus, and the other 6 patients were cured without fracture signs. The sensitivity of MRI in the diagnosis of pediatric lateral condylar fracture was 100%, which was significantly higher than that of X-ray (88.89%) (P<0.05). The results of X-ray and MRI in the diagnosis of pediatric lateral condylar fracture were generally consistent (kappa value = 0.465;< 0.01). Among the 72 confirmed cases, 35 subjects had a fracture of trochlear cartilage chain. The sensitivity of MRI in the diagnosis of pediatric fracture of lateral condyle of humerus was 97.14%, which was significantly higher than that of X-ray (62.86%) (P<0.05). The difference was statistically significant (P<0.05). The sensitivity of 3d-fs-fspgr or 3d-fspgr was significantly higher than that of fs-t2wi and fs-pdwi (P< 0.05). Conclusion: As evidenced by the obtained results, MRI was superior to X-ray in the diagnosis of pediatric humeral epicondylar fracture stability and evaluation of fracture displacement. Furthermore, 3d-fs-fspgr or 3d-fspgr was the best MR sequence to show the pediatric humeral epicondylar fracture. These findings can provide theoretical basis for the establishment of clinical treatment plan.

scholarly journals The management of intra-articular lateral femoral condyle (Hoffa) fracture of the knee using arthroscopy-assisted fixation: a case report

2018 ◽  
Vol 6 (11) ◽  
pp. 3759
Author(s):  
I. G. N. Wien Aryana ◽  
Trimanto Wibowo
Keyword(s):  
Internal Fixation ◽  
Femoral Fracture ◽  
Motor Vehicle ◽  
Lateral Condyle ◽  
X Rays ◽  
Distal Femoral Fracture ◽  
X Ray ◽  
Hoffa Fracture ◽  
Limited Range Of Motion ◽  
The Right

A Hoffa fracture is a type of supracondylar distal femoral fracture with fracture line located in the coronal plane. It is a rare injury consisting of tangential (coronal shear) fracture of distal femoral condyles. Unicondylar knee fractures are rare and present some diagnostic difficulties due to poor visibility on standard X-ray and are especially harder to identify in non-displaced fracture. A fifty-four-year-old male presented to our emergency room with a chief complaint of pain over his right knee that started 10 months prior. He previously was involved in a motor vehicle accident and underwent open reduction and internal fixation with plate and screws. Physical examination revealed swelling and tenderness over the right knee with limited range of motion. Plain X-ray showed union of tibia plateau fracture with plate and screws and no evidence of distal femoral fracture. A magnetic resonance imaging of the right knee was performed and revealed an intraarticular lateral condyle femur fracture with transverse configuration that was previously missed on plain X-ray. Arthroscopy-assisted reduction and internal fixation using antero-posterior and postero-anterior oriented screws were performed and good reduction was achieved. Diagnosis of this type of fracture is challenging and require some experience. Awareness of such entity and strong clinical suspicion are essential for diagnosis because most of the time the standard X-rays may appear normal. Arthroscopy-assisted fracture fixation using antero-posterior and postero-anterior oriented screws for Hoffa fracture offers many advantages and allows for early mobilization postoperatively without any loss of reduction.

Surgical Treatment With Nonunion Of The Lateral Humeral Condyle Of Humerus With Cubitus Valgus In Children Using Apparat Ilizarov

2010 ◽  
Vol 1 ◽  
Author(s):  
Ilkhom Khujanazarov ◽  
Iskandar Khodjanov
Keyword(s):  
Surgical Treatment ◽  
Operative Procedure ◽  
Lateral Condyle ◽  
Cubitus Valgus ◽  
X Ray ◽  
Loss Of Correction ◽  
The Mean ◽  
Humeral Condyle ◽  
Degrees Of Severity

Background. Nonunion of the lateral humeral condyle  are of the complex pathology of the elbow joint, occurring relatively often and resulting in disability of children.The treatment of nonunion of the lateral humeral condyle of humerus with cubitus valgus remains controversial. Purpose of this report was improvement of the results of surgical treatment of the nonunion of the lateral humeral condyle of humerus with cubitus valgus of the lateral humeral condyle of humerus with cubitus valgus with use of differential approach to the surgical strategy.Material and methods. We were observing 28 children (17 boys and 11 girls) with nonunion and long-standing nonunion of lateral condyle of humerus, with various degrees of severity. There were used MRI and X-ray investigations for differential study of the patients divided into 3 groups in relation to stability and non-stability of the nonunion of the lateral humeral condyle of humerus with cubitus valgus of the lateral humeral condyle of humerus with cubitus valgus.Results. All 28 patients lateral humeral condyle nonunions with cubitus valgus achieved union within sixty five days after operative procedure using Ilisarov’s technique. The mean postoperative humerus-ulna angle was 6,0 degrees of cubitus valgus. All of reverse T-osteothomies healed uneventfully, and there was no loss of correction postoperatively.  The mean duration of follow-up was 7 years. The overall results were excellent in 15(53,5%) patients,  good in 11(39,3%) patients, and fair in 2(7,2%) patients. All 28 patients lateral humeral condyle nonunions with cubitus valgus achieved union within sixty five days after operative procedure using Ilisarov’s technique. The mean postoperative humerus-ulna angle was 6,0 degrees of cubitus valgus. All of reverse T-osteothomies healed uneventfully, and there was no loss of correction postoperatively.  The mean duration of follow-up was 7 years. The overall results were excellent in 15(53,5%) patients,  good in 11(39,3%) patients, and fair in 2(7,2%) patients.

scholarly journals ABCD of Lateral Condyle Humerus Fracture in Children: Anatomy, Biomechanics, Classification and Diagnosis

2021 ◽  
Vol 7 (2) ◽  
Keyword(s):  
Decision Making ◽  
Internal Rotation ◽  
Delayed Diagnosis ◽  
Signs And Symptoms ◽  
Classification Systems ◽  
Lateral Condyle ◽  
X Ray ◽  
Lateral Condyle Fracture ◽  
Elbow Fractures ◽  
Condyle Fracture

The lateral condyle fractures which form less than 20% of paediatric elbow fractures are seen at average 6 years age and have less severity of signs and symptoms which may lead to delayed diagnosis. Internal rotation view of X-ray of elbow is important in addition to standard AP and Lateral views. Jakob, Weiss and Song are commonly used classification systems in decision making. Keywords: Lateral condyle fracture, Children, Classification, Anatomy, Diagnosis.

Space and Time Distribution of Hard X-Ray Emission in a Loop at the Beginning of a Flare

1994 ◽  
Vol 144 ◽  
pp. 275-277
Author(s):  
M. Karlický ◽  
J. C. Hénoux
Keyword(s):  
Time Distribution ◽  
Electron Bombardment ◽  
Spatial Evolution ◽  
Superthermal Electrons ◽  
Flare Loop ◽  
X Ray ◽  
Superthermal Electron ◽  
Flare Loops ◽  
Chromospheric Evaporation ◽  
Temporal And Spatial

AbstractUsing a new ID hybrid model of the electron bombardment in flare loops, we study not only the evolution of densities, plasma velocities and temperatures in the loop, but also the temporal and spatial evolution of hard X-ray emission. In the present paper a continuous bombardment by electrons isotropically accelerated at the top of flare loop with a power-law injection distribution function is considered. The computations include the effects of the return-current that reduces significantly the depth of the chromospheric layer which is evaporated. The present modelling is made with superthermal electron parameters corresponding to the classical resistivity regime for an input energy flux of superthermal electrons of 109erg cm−2s−1. It was found that due to the electron bombardment the two chromospheric evaporation waves are generated at both feet of the loop and they propagate up to the top, where they collide and cause temporary density and hard X-ray enhancements.

Some Problems in Understanding the Solar Corona

1994 ◽  
Vol 144 ◽  
pp. 1-9
Author(s):  
A. H. Gabriel
Keyword(s):  
Solar Corona ◽  
Solar Atmosphere ◽  
Theoretical Modelling ◽  
Total System ◽  
Major Advance ◽  
X Ray ◽  
Proper Perspective ◽  
Space Observations

The development of the physics of the solar atmosphere during the last 50 years has been greatly influenced by the increasing capability of observations made from space. Access to images and spectra of the hotter plasma in the UV, XUV and X-ray regions provided a major advance over the few coronal forbidden lines seen in the visible and enabled the cooler chromospheric and photospheric plasma to be seen in its proper perspective, as part of a total system. In this way space observations have stimulated new and important advances, not only in space but also in ground-based observations and theoretical modelling, so that today we find a well-balanced harmony between the three techniques.

White-Light Coronal Structures: Streamers and CMEs

1994 ◽  
Vol 144 ◽  
pp. 82
Author(s):  
E. Hildner
Keyword(s):  
Emission Line ◽  
Electron Density ◽  
White Light ◽  
Coronal Mass Ejections ◽  
X Rays ◽  
Solar Cycles ◽  
Temperature Function ◽  
X Ray ◽  
Eclipse Observations ◽  
Coronal Structures

AbstractOver the last twenty years, orbiting coronagraphs have vastly increased the amount of observational material for the whitelight corona. Spanning almost two solar cycles, and augmented by ground-based K-coronameter, emission-line, and eclipse observations, these data allow us to assess,inter alia: the typical and atypical behavior of the corona; how the corona evolves on time scales from minutes to a decade; and (in some respects) the relation between photospheric, coronal, and interplanetary features. This talk will review recent results on these three topics. A remark or two will attempt to relate the whitelight corona between 1.5 and 6 R⊙to the corona seen at lower altitudes in soft X-rays (e.g., with Yohkoh). The whitelight emission depends only on integrated electron density independent of temperature, whereas the soft X-ray emission depends upon the integral of electron density squared times a temperature function. The properties of coronal mass ejections (CMEs) will be reviewed briefly and their relationships to other solar and interplanetary phenomena will be noted.

Iron K-Line Emission from X-Ray Binaries

1988 ◽  
Vol 102 ◽  
pp. 47-50
Author(s):  
K. Masai ◽  
S. Hayakawa ◽  
F. Nagase
Keyword(s):  
Accretion Disk ◽  
Radiative Recombination ◽  
Characteristic Temperature ◽  
Line Emission ◽  
Ionization Front ◽  
Continuum Radiation ◽  
X Ray ◽  
Low Mass ◽  
X Ray Binaries

AbstractEmission mechanisms of the iron Kα-lines in X-ray binaries are discussed in relation with the characteristic temperature Txof continuum radiation thereof. The 6.7 keV line is ascribed to radiative recombination followed by cascades in a corona of ∼ 100 eV formed above the accretion disk. This mechanism is attained for Tx≲ 10 keV as observed for low mass X-ray binaries. The 6.4 keV line observed for binary X-ray pulsars with Tx&gt; 10 keV is likely due to fluorescence outside the He II ionization front.

Diagnostics of Gold Laser Plasmas

1988 ◽  
Vol 102 ◽  
pp. 357-360
Author(s):  
J.C. Gauthier ◽  
J.P. Geindre ◽  
P. Monier ◽  
C. Chenais-Popovics ◽  
N. Tragin ◽  
...  
Keyword(s):  
Experimental Results ◽  
Pure Gold ◽  
Electronic Temperature ◽  
X Ray ◽  
Laser Plasmas ◽  
Collisional Radiative Model ◽  
Radiative Model

AbstractIn order to achieve a nickel-like X ray laser scheme we need a tool to determine the parameters which characterise the high-Z plasma. The aim of this work is to study gold laser plasmas and to compare experimental results to a collisional-radiative model which describes nickel-like ions. The electronic temperature and density are measured by the emission of an aluminium tracer. They are compared to the predictions of the nickel-like model for pure gold. The results show that the density and temperature can be estimated in a pure gold plasma.

Axial Observation of X-Ray Spectra from a Beam-Foil Source

1988 ◽  
Vol 102 ◽  
pp. 339-342
Author(s):  
J.M. Laming ◽  
J.D. Silver ◽  
R. Barnsley ◽  
J. Dunn ◽  
K.D. Evans ◽  
...  
Keyword(s):  
Spectral Resolution ◽  
Heavy Ion ◽  
Ion Beams ◽  
Beam Axis ◽  
Doppler Broadening ◽  
X Ray ◽  
Beam Foil

AbstractNew observations of x-ray spectra from foil-excited heavy ion beams are reported. By observing the target in a direction along the beam axis, an improvement in spectral resolution, δλ/λ, by about a factor of two is achieved, due to the reduced Doppler broadening in this geometry.

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