Prevalance Of Radiological Investigation In Low Back Pain - An Observational Study

Introduction: Lumbar spine pathology is major healthcare burden encountered in district and urban hospitals. Diagnostic imaging in these patients is not always indicated. Imaging is considered in those patients who show little or no improvement in their LBP after approximately six weeks of medical management with or without physical therapy, the current study was undertaken to assess the appropriateness of LBP imaging in primary care following the ACP guidelines. The inclusion criteria for the study were adult patients with persistent low back pain with orMethod: without radiculopathy post six weeks of medical management affecting their activity of daily living. And the exclusion criteria were spinal trauma , neurological impairment, bladder and bowel involvement, spinal malformations, history of malignancy presenting at the time of index visit. The study included total 115 patients. Out of 115 patients 87Result: [70%] patients showed abnormal finding on the radiographs. The most common abnormal finding was disco vertebral degeneration such as spondylosis (osteophyte formation) in 49.6%. Routine x-ray imaging in low backConclusion: pain patients is not always warranted. Moreover routine radiological imaging methods are not associated with meaningful clinical outcomes for the patients. Unnecessary imaging can lead to harmful radiation exposure of the patients and can further lead to additional medical expenditure and needless surgical intervention. Diagnostic radiological imaging should be used judicially.

Comparison of the application value of X-ray and MRI in the diagnosis of subacromial impingement syndrome / 中国医师进修杂志

Objective:To compare and analyze the value of X-ray examination and MRI in the diagnosis of subacromial impingement syndrome.Methods:Sixty patients with shoulder pain and weakness in Beijing Tiantan Hospital, Capital Medical University from January 2019 to May 2021 were selected. All patients underwent X-ray and MRI. Taking clinical diagnosis as the gold standard, the diagnostic efficacy of X-ray and MRI in subacromial impact syndrome was compared and analyzed.Results:The consistency between MRI and gold standard was good ( Kappa = 0.769, P<0.01), and the consistency between X-ray and gold standard was general ( Kappa = 0.464, P<0.01); there was no significant difference between X-ray examination and MRI examination of acromion morphological classification, subacromial space classification ( P>0.05); The sensitivity of MRI was higher than that of X-ray, and the difference was statistically significant ( χ2 = 4.00, P<0.05). There was no difference between MRI and X-ray, and the difference was not statistically significant ( χ2 = 0.25, P>0.05). Conclusions:X-ray and MRI are complementary to each other in the diagnosis of subacromial impingement syndrome. X-ray examination should be carried out first, and MRI should be carried out when necessary.

Applying Deep Learning in Medical Images: The Case of Bone Age Estimation / 대한의료정보학회지

OBJECTIVES: A diagnostic need often arises to estimate bone age from X-ray images of the hand of a subject during the growth period. Together with measured physical height, such information may be used as indicators for the height growth prognosis of the subject. We present a way to apply the deep learning technique to medical image analysis using hand bone age estimation as an example. METHODS: Age estimation was formulated as a regression problem with hand X-ray images as input and estimated age as output. A set of hand X-ray images was used to form a training set with which a regression model was trained. An image preprocessing procedure is described which reduces image variations across data instances that are unrelated to age-wise variation. The use of Caffe, a deep learning tool is demonstrated. A rather simple deep learning network was adopted and trained for tutorial purpose. RESULTS: A test set distinct from the training set was formed to assess the validity of the approach. The measured mean absolute difference value was 18.9 months, and the concordance correlation coefficient was 0.78. CONCLUSIONS: It is shown that the proposed deep learning-based neural network can be used to estimate a subject's age from hand X-ray images, which eliminates the need for tedious atlas look-ups in clinical environments and should improve the time and cost efficiency of the estimation process.

Ensayo estructural no destructivo utilizando microtomografía de rayos X para estimación de diferencias de densidad másica en muestras óseas de conejo / Non-destructive structural assay using X-ray micro-tomography to estimate mass density differences in rabbit bone samples

Al realizarse estudios sobre muestras óseas para analizar características como dureza, densidad y salud, se suelen utilizar equipamientos que permiten la cuantificación de la densidad electrónica, proporcional a la densidad másica, que se relaciona directamente con la densidad mineral ósea. El test conocido como densitometría ósea se suele realizar con equipos de rayos X, ultrasonido o por medio de la utilización de isótopos radioactivos. Este estudio cuantifica la cantidad mineral ósea por superficie y suele ser utilizado para evaluar, entre otros, riesgos de fracturas o estado de osteoporosis. La técnica de tomografía computada utiliza imágenes bidimensionales de rayos X y métodos de reconstrucción tomográfica implementados en algoritmos computacionales para obtener información de la estructura interna de un objeto, de forma no destructiva. Equipamientos especialmente desarrollados logran obtener imágenes con resolución sub-milimétrica, dando lugar a la técnica conocida como micro-tomografía. La posibilidad de estudiar estructuras óseas con este grado de resolución y obtener imágenes morfológicas tridimensionales con información de la densidad electrónica, presenta una importante opción para estudios específicos sobre, entre otros, crecimiento de hueso y estudios de nuevos componentes que permiten acelerar el crecimiento de tejidos dañados. En el presente trabajo se analizan muestras óseas del cráneo de conejos donde se han dañado determinadas zonas y se han injertado diferentes sustancias tendientes a evaluar respuestas de reparación de tejido óseo. El análisis se realiza a los fines de estudiar la performance de la técnica de micro-tomografía desarrollada en laboratorio con el objetivo de observar su potencialidad en este tipo de estudios y la capacidad de estos análisis en la caracterización de las propiedades físicas de este tipo de muestras.

When performing studies on bone samples aiming at analyzing its physical characteristics such as hardness, density and health, typically it is used to utilize different equipment for the quantification of electron density, which results proportional to mass density, which is directly related to bone mineral density. The test known as bone densitometry is usually done using X-ray equipment, ultrasound or through the utilization of radioactive isotopes. This analysis quantifies the amount of mineral bone on a surface and is usually implemented to assess, among others, risks of fractures or the osteoporosis state in a patient. The computed tomography technique uses two-dimensional X-ray images and tomographic reconstruction methods implemented on computational algorithms to obtain information about the internal structure of an object in a nondestructively way. Specially developed equipment able to obtain images with sub-millimeter resolution, results in the technique known as micro-tomography. The ability to study bone structures at sub-millimeter levels and obtain three-dimensional morphological images with electron density information, presents an important option for specific studies on bone growth and studies on new components that allow the growth of damaged tissues. In this paper rabbits cranium bone samples where certain areas have been damaged and have been filled with different substances specially designed to evaluate repair responses on bone tissue are analyzed. The analysis is performed in order to study the performance of the micro-tomography technique developed in the laboratory in order to observe its potentiality in this type of studies and the ability of these analysis in the characterization of the physical properties of such samples.

Measurement of Patient Radiation Doses during Certain Diagnostic Radiography Procedures.

Aims: The aims of this study were to measure the radiation dose to patients in certain routine x-ray examinations and to estimate organs equivalent and effective doses. Study Design: This prospective study included 220 adult patients who underwent 9 radiographic X ray imaging procedures. Place and Duration of Study: This study was conducted Sharg Elneel Model Hospital (A), Fidail Hospital (B), Al-Amal Hospital (C) and Medical Corps Hospital (D), Khartoum state, Sudan, between June, 2013-August, 2015. Methodology: The entrance surface air kerma (ESAK) was measured for four radiographic examinations using thermo luminescence dosimeters (TLD-GR200A). A total of 220 patients were examined in four hospitals. Results: The mean ESAK (mGy) for the chest, hand, knee joint, leg, shoulder, foot, arm, ankle and lumbar spine were 0.40±0.04, 0.36±0.03, 0.64±0.07, 0.39±0.04, 0.35±0.02, 0.54±0.02, 0.26±0.02, 0.46±0.03 and 1.98±1.1, respectively. The overall effective dose was 0.16±0.05 mSv. Conclusions: The results of ESAK were comparable with previous studies. Patient’s doses showed wide variations in the same types of x-ray examination due to the choice of exposure factors, technique, focus-to-film distance, filter, film-screen speed and the output of the x-ray units and processor quality were used.

Features of Cervical Vertebra X-ray Examination and Transcranial Doppler in Children with Cervical Vertigo / 中国康复理论与实践

@#Objective To analyze the features of cervical vertebra X-ray examination and transcranial Doppler (TCD) in children with cervical vertigo, and investigate the mechanism of the disease. Methods X-ray examination of cervical vertebra and TCD were performed on 80 children with cervical vertigo, and the features of the results were analyzed. Results The abnormal results of cervical X-ray examination mainly showed atlantoaxial joint or/and C2, C3 vertebral joint disorders, some of which combined with cervical instability, cervical curvaturestraightened and even reverse curvature, cervical scoliosis. The abnormal results of TCD showed the blood flow velocity in single or multiple branch of artery increased mainly, some of which decreased or became asymmetrial. Conclusion The cervical vertigo in children may result from various kinds of disorders of the atlas, axis or/and C2, C3 vertebrae.

Features of Cervical Vertebra X-ray Examination and Transcranial Doppler in Children with Cervical Vertigo / 中国康复理论与实践

Objective To analyze the features of cervical vertebra X-ray examination and transcranial Doppler (TCD) in children with cervical vertigo, and investigate the mechanism of the disease. Methods X-ray examination of cervical vertebra and TCD were performed on 80 children with cervical vertigo, and the features of the results were analyzed. Results The abnormal results of cervical X-ray examina-tion mainly showed atlantoaxial joint or/and C2, C3 vertebral joint disorders, some of which combined with cervical instability, cervical cur-vature straightened and even reverse curvature, cervical scoliosis. The abnormal results of TCD showed the blood flow velocity in single or multiple branch of artery increased mainly, some of which decreased or became asymmetrial. Conclusion The cervical vertigo in children may result from various kinds of disorders of the atlas, axis or/and C2, C3 vertebrae.

Review of X-ray Phase Contrast Imaging Techniques and Propagation Based Imaging Using a Benchtop Microfocal Source / Jurnal Sains Kesihatan Malaysia

Currently, the basis for standard clinical X-ray radiography is absorption, tracking attenuation of radiation when X-ray beams pass through a particular part of the body. The fundamental interaction processes are dependent on variations in the atomic number and density of the target medium; consequentially radiographic contrast can be poor, particularly in regard to soft tissue imaging. Over the past several years considerable interest has been paid to utilising phase properties of the X-ray field to enhance radiographic contrast in challenging circumstances, particularly with respect to soft-tissue imaging. Surrey is among an increasing number of institutes in which a programme of investigation of phase contrast X-ray imaging has been established. We briefly review some basic ideas in X-ray phase contrast imaging and then examine the radiographic contrast enhancement that can be obtained, use being made of the method of free-space propagation and investigating a number of test objects, including biological samples. The equipment used at Surrey is relatively simple, comprising of bench-top X-ray tubes with focal spot sizes from a few microns up to 100 microns and a position sensitive 12 bit CCD detector.

New Advance of Digital X-ray Imaging Technique / 医疗卫生装备

Digital X-ray imaging technique has been developing rapidly in recent years, and makes it possible for people to be radiated by lower X-ray dose than before to get the images for diagnosis. Current development in 7 aspects about digital roentgenography is introduced in this article.