scholarly journals Medical knowledge-guided deep curriculum learning for elbow fracture diagnosis from x-ray images

2021 ◽  
Author(s):  
Jun Luo ◽  
Gene Kitamura ◽  
Emine Doganay ◽  
Dooman Arefan ◽  
Shandong Wu
Keyword(s):  
Medical Knowledge ◽  
Elbow Fracture ◽  
X Ray ◽  
Fracture Diagnosis

An Algorithm for Acute Wrist Trauma

1993 ◽  
Vol 18 (2) ◽  
pp. 207-212 ◽  
Author(s):  
C. F. LARSEN ◽  
V. BRØNDUM ◽  
G. WIENHOLTZ ◽  
J. ABRAHAMSEN ◽  
J. BEYER
Keyword(s):  
Bone Scintigraphy ◽  
Hot Spot ◽  
Radiographic Examination ◽  
Sufficient Information ◽  
Distal Radial Fractures ◽  
X Ray ◽  
Wrist Trauma ◽  
Scaphoid Fractures ◽  
Appropriate Treatment ◽  
Fracture Diagnosis

A systematic approach to the acute traumatized wrist is of importance to achieve early diagnosis, with efficient use of advanced imaging modalities. In a 6-month period 641 patients aged 15 years or over were examined using an algorithm for acute wrist trauma in order to secure early and appropriate treatment. In 293 (46%) cases routine radiographic examination supplied sufficient information to establish a fracture diagnosis. All 33 scaphoid fractures (including five scaphoid non-unions) were demonstrated on the initial X-ray examination. In 56 patients (9%) scintigraphy proved useful for selecting cases in need of further radiographic examination. Among 31 patients with focal activity on bone scintigraphy, CT and/or tomography revealed eight distal radial fractures, one fracture of the ulnar styloid, and eight fractures of carpal bones. Fractures were revealed using tomography and/or “hot spot views” in patients with negative CT examinations suggesting that further examinations should be performed in cases with increased focal activity on bone scintigraphy and a negative CT examination.

scholarly journals P073: Feasibility of emergency department targeted ultrasound for rib fracture diagnosis in minor thoracic injury

CJEM ◽  
2016 ◽  
Vol 18 (S1) ◽  
pp. S102-S103
Author(s):  
E. Lalande ◽  
C. Guimont ◽  
M. Émond ◽  
M. Parent ◽  
B. Batomen Kuimi ◽  
...  
Keyword(s):  
Emergency Department ◽  
Daily Practice ◽  
Rib Fractures ◽  
Rib Fracture ◽  
Thoracic Injury ◽  
Limiting Factor ◽  
Median Score ◽  
X Ray ◽  
Targeted Ultrasound ◽  
Fracture Diagnosis

Introduction: Rib fractures represent a frequent condition associated with Minor Thoracic Injury (MTI). Since the last decade, ultrasound have become an important part of emergency physician’s (EP) daily practice, and its applications have become numerous. The main objective of this study was to evaluate the feasibility of Emergency Department Targeted Ultrasound (EDTU) for rib fracture diagnosis in patients with MTI. Secondary objectives were to 1) evaluate patients’ pain during the EDTU procedure, 2) assess clinicians’ degree of certitude over rib fracture diagnosis made by EDTU, 3) identify the limitations of the use of EDTU technique, and 4) compare the diagnosis obtained with EDTU to radiography results. Methods: Adult patients who presented with clinical suspicion of rib fractures after MTI were included. All patients underwent EDTU performed by emergency physicians (EP) prior to a rib view X-ray. Visual Analogue Scale (VAS) ranging from 0 to 100 was used to ascertain feasibility, patients’ pain and clinicians’ degree of certitude. Feasibility was defined as a score of more than 50 on the VAS. We also documented the radiologists’ interpretation of rib view X-ray. Radiologists were blinded to the EDTU results. Results: Ninety-six patients were included. A majority (65%) of EP concluded that the EDTU technique to diagnose rib fracture was feasible (VAS score > 50). Median score for feasibility was 63. Median score was 31 (Interquartile range (IQR) 5-57) for patients’ pain related to the EDTU examination and 72 (IQR 32-92) for the degree of certitude over the diagnosis made by EDTU. The main limiting factor of the EDTU technique was pain during patient examination (15%). Conclusion: EDTU examination appears to be a feasible technique for rib fractures diagnosis in the ED.

scholarly journals Feasibility of emergency department point-of-care ultrasound for rib fracture diagnosis in minor thoracic injury

CJEM ◽  
2016 ◽  
Vol 19 (3) ◽  
pp. 213-219 ◽  
Author(s):  
Élizabeth Lalande ◽  
Chantal Guimont ◽  
Marcel Émond ◽  
Marc Charles Parent ◽  
Claude Topping ◽  
...  
Keyword(s):  
Emergency Department ◽  
Point Of Care ◽  
Rib Fracture ◽  
Thoracic Injury ◽  
Limiting Factor ◽  
Point Of Care Ultrasound ◽  
Median Score ◽  
Emergency Physicians ◽  
X Ray ◽  
Fracture Diagnosis

ABSTRACTObjectivesThe main objective of this study was to evaluate the feasibility of emergency department (ED) point-of-care ultrasound (PoCUS) for rib fracture diagnosis in patients with minor thoracic injury (mTI). Secondary objectives were to 1) evaluate patients’ pain during the PoCUS procedure, 2) identify the limitations of the use of PoCUS technique, and 3) compare the diagnosis obtained with PoCUS to radiography results.MethodsAdult patients who presented with clinical suspicion of rib fractures after mTI were included. All patients underwent PoCUS performed by emergency physicians (EPs) prior to a rib view X-ray. A visual analogue scale (VAS) ranging from 0 to 100 was used to ascertain feasibility, patients’ pain and clinicians’ degree of certitude. Feasibility was defined as a score of more than 50 on the VAS. We documented the radiologists’ interpretation of rib view X-ray. Radiologists were blinded to the PoCUS results.ResultsNinety-six patients were included. A majority (65%) of EPs concluded that the PoCUS technique to diagnose rib fracture was feasible (VAS score > 50). Median score for feasibility was 63. Median score was 31 (Interquartile range [IQR] 5–57) for patients’ pain related to the PoCUS. The main limiting factor of the PoCUS technique was pain during patient examination (15%).ConclusionPoCUS examination appears to be a feasible technique for a rib fracture diagnosis in the ED.

Are Ottawa knee rules useful in actual trauma care?

Open Medicine ◽  
2007 ◽  
Vol 2 (2) ◽  
pp. 216-221
Author(s):  
Kamal Nagpal ◽  
Mandar Marathe
Keyword(s):  
Knee Injuries ◽  
Fracture Rate ◽  
X Rays ◽  
Delayed Fracture ◽  
X Ray ◽  
Common Presentation ◽  
Fracture Diagnosis ◽  
Knee Trauma ◽  
Set Up ◽  
Acute Knee

AbstractAcute knee injuries are a common presentation to the emergency department(ED). Ottawa knee rules (OKR) have shown to reduce the number of radiographs in these patients in North American studies and a fracture rate of 5% has been reported. Based on this, we tested the hypothesis that it was possible to decrease the number of x-ray films obtained after a knee trauma without delayed fracture diagnosis by means of the Ottawa knee rules in British set up. A total of 118 adult patients with acute Knee injuries were studied. A checklist in an easy-to-use format was produced to act as an aide-memoir and to encourage clinicians to apply the OKR in their decision making. Sixty patients were studied before introducing the check list stickers of OKR and fifty eight were studied after introducing the stickers. The OKR were found to have been obeyed in 24 (40%) of patients in the group which did not have stickers. In the group assessed without an OKR sticker, 28 (46.7%) of patients had knee radiography, compared with 29 (50%) of patients in the group who were assessed with an OKR sticker. There was no decrease in the number of x-rays after following the Ottawa Knee Rules (OKR).

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> 10 keV is likely due to fluorescence outside the He II ionization front.

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