Optimal Atlas Segmentation on CT Images for Diagnosis of Pediatric Mycoplasma Pneumonia

This work aimed to explore the clinical application value of CT imaging technology based on the optimal Atlas segmentation algorithm (OASA) in the diagnosis of pediatric mycoplasma pneumonia (MP). Eighty-eight children with MP were selected and divided into group A (CT image based on the OASA) and group B (chest X-ray) according to the diagnosis methods. The detection rate, image feature performance, and image quality satisfaction of the two groups of children were compared. The results showed that the detection rate of group A was 97.73% and that of group B was 95.46%, and there was no considerable difference between the two ( P > 0.05). The pleural effusion detection rate of children in group A was evidently superior to that of X-ray group, while the increased bronchovascular shadows’ detection rate was greatly inferior to that of X-ray group ( P < 0.05). Comparison results of nodules’ shadows, patchy shadows, acinar parenchyma shadows, and interstitial infiltration between two groups showed that there was no notable difference ( P > 0.05). CT image quality satisfaction (98.50%) was higher versus X-ray (79.46%) ( P < 0.05). To sum up, CT images based on the OASA can be adopted in the clinical diagnosis of pediatric MP, and CT images were better than chest X-rays.

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The Impact of Left Atrial Size in Catheter Ablation of Atrial Fibrillation Using Remote Magnetic Navigation

Cardiology Research and Practice ◽

10.1155/2018/3096261 ◽

2018 ◽

Vol 2018 ◽

pp. 1-8

Author(s):

Xiao-yu Liu ◽

Hai-feng Shi ◽

Jie Zheng ◽

Ku-lin Li ◽

Xiao-xi Zhao ◽

...

Keyword(s):

Atrial Fibrillation ◽

Catheter Ablation ◽

Left Atrial ◽

Magnetic Navigation ◽

Remote Magnetic Navigation ◽

X Ray ◽

Group A ◽

Group B ◽

The Impact

Objective. The objective of this study was to investigate the impact of left atrial (LA) size for the ablation of atrial fibrillation (AF) using remote magnetic navigation (RMN). Methods. A total of 165 patients with AF who underwent catheter ablation using RMN were included. The patients were divided into two groups based on LA diameter. Eighty-three patients had small LA (diameter <40 mm; Group A), and 82 patients had a large LA (diameter ≥40 mm; Group B). Results. During mapping and ablation, X-ray time (37.0 (99.0) s vs. 12 (30.1) s, P<0.001) and X-ray dose (1.4 (2.7) gy·cm2 vs. 0.7 (2.1) gy·cm2, P=0.013) were significantly higher in Group A. No serious complications occurred in any of the patients. There was no statistical difference in the rate of first anatomical attempt of pulmonary vein isolation between the two groups (71.1% vs. 57.3%, P=0.065). However, compared with Group B, the rate of sinus rhythm was higher (77.1% vs. 58.5%, P<0.001) during the follow-up period. More patients in Group A required a sheath adjustment (47/83 vs. 21/82, P<0.001), presumably due to less magnets positioned outside of the sheath. In vitro experiments with the RMN catheter demonstrated that only one magnet exposed created the sheath affects which influenced the flexibility of the catheter. Conclusions. AF ablation using RMN is safe and effective in both small and large LA patients. Patients with small LA may pose a greater difficulty when using RMN which may be attributed to the fewer magnets beyond the sheath. As a result, the exposure of radiation was increased. This study found that having at least two magnets of the catheter positioned outside of the sheath can ensure an appropriate flexibility of the catheter.

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Repairing Rabbit Radius Bone Defects with Simvastatin Compound Biological Bone

Journal of Biomaterials and Tissue Engineering ◽

10.1166/jbt.2021.2710 ◽

2021 ◽

Vol 11 (7) ◽

pp. 1263-1270

Author(s):

Zhong-Yu Liu ◽

Jin-Li Zhang ◽

Yang Zhang ◽

Shi-Lian Kan ◽

Jun Liang ◽

...

Keyword(s):

Bone Defect ◽

Maximum Stress ◽

Biomechanical Testing ◽

Bone Defects ◽

Bending Test ◽

Bone Material ◽

X Ray ◽

Group A ◽

Group B ◽

Group D

Objective: This study aimed to investigate the feasibility of repairing rabbit radius bone defects with simvastatin compound biological bone. Methods: Simvastatin biological bone material was prepared, and osteoblasts were cultured. A total of 42 New Zealand white rabbits were randomly divided into four groups, and a bone defect with a length of 15 mm was created at the middle part of the radial shaft of both limbs in each rabbit, thereby establishing a bone defect model. The grafts in group A were biological bones of osteoblasts combined with simvastatin; the grafts in group B were biological bones of simvastatin; the grafts in group C were biological compound bones of osteoblasts; and the grafts in group D were simple biological bones. In each group, four animals were randomly sacrificed at the sixth and twelfth week after surgery, and specimens were collected for gross observation, X-ray examination, histological observation, and biomechanical testing. In each group, two animals were randomly sacrificed at the twelfth week after surgery; a three-point bending test was performed using a biomechanical testing machine, and the results were compared with those of a normal radius. Results: The X-ray and histological examinations at 6 and 12 weeks after surgery revealed that the osteogenesis ability of the simvastatin biological bone and osteoblast-simvastatin biological bone was better than that of the osteoblast biological bone and simple biological bone, which was superior in group A and group B to group C and group D. The results of the biomechanical examination revealed that the maximum stress of the normal radius was significantly higher than that of the experimental groups. Among the experimental groups, the difference between group A and group B was not statistically significant, and the maximum stress was higher in groups A and B than in groups C and D. Conclusion: Simvastatin biological bone material can promote the repair of rabbit radius defects and increase the quality of bone healing.

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Deep Learning Enabled Deblurring of Computed Tomography Images of Porous Media

10.2118/208665-ms ◽

2021 ◽

Author(s):

Khalid Labib Alsamadony ◽

Ertugrul Umut Yildirim ◽

Guenther Glatz ◽

Umair bin Waheed ◽

Sherif M. Hanafy

Keyword(s):

Computed Tomography ◽

Image Quality ◽

Transfer Learning ◽

Temporal Resolution ◽

Exposure Time ◽

Ct Images ◽

Loss Functions ◽

High Quality ◽

X Ray ◽

Training Images

Abstract Computed tomography (CT) is an important tool to characterize rock samples allowing quantification of physical properties in 3D and 4D. The accuracy of a property delineated from CT data is strongly correlated with the CT image quality. In general, high-quality, lower noise CT Images mandate greater exposure times. With increasing exposure time, however, more wear is put on the X-Ray tube and longer cooldown periods are required, inevitably limiting the temporal resolution of the particular phenomena under investigation. In this work, we propose a deep convolutional neural network (DCNN) based approach to improve the quality of images collected during reduced exposure time scans. First, we convolve long exposure time images from medical CT scanner with a blur kernel to mimic the degradation caused because of reduced exposure time scanning. Subsequently, utilizing the high- and low-quality scan stacks, we train a DCNN. The trained network enables us to restore any low-quality scan for which high-quality reference is not available. Furthermore, we investigate several factors affecting the DCNN performance such as the number of training images, transfer learning strategies, and loss functions. The results indicate that the number of training images is an important factor since the predictive capability of the DCNN improves as the number of training images increases. We illustrate, however, that the requirement for a large training dataset can be reduced by exploiting transfer learning. In addition, training the DCNN on mean squared error (MSE) as a loss function outperforms both mean absolute error (MAE) and Peak signal-to-noise ratio (PSNR) loss functions with respect to image quality metrics. The presented approach enables the prediction of high-quality images from low exposure CT images. Consequently, this allows for continued scanning without the need for X-Ray tube to cool down, thereby maximizing the temporal resolution. This is of particular value for any core flood experiment seeking to capture the underlying dynamics.

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A Robust Line Filter for Automatic X-Ray/CT Image Segmentation

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.721.783 ◽

2014 ◽

Vol 721 ◽

pp. 783-787

Author(s):

Shao Hu Peng ◽

Hyun Do Nam ◽

Yan Fen Gan ◽

Xiao Hu

Keyword(s):

Multiscale Analysis ◽

Automatic Segmentation ◽

Local Variation ◽

Recognition System ◽

Ct Images ◽

Gray Level ◽

Ct Image ◽

Image Pyramid ◽

Level Variation ◽

X Ray

Automatic segmentation of the line-like regions plays a very important role in the automatic recognition system, such as automatic cracks recognition in X-ray images, automatic vessels segmentation in CT images. In order to automatically segment line-like regions in the X-ray/CT images, this paper presents a robust line filter based on the local gray level variation and multiscale analysis. The proposed line filter makes usage of the local gray level and its local variation to enhance line-like regions in the X-ray/CT image, which can well overcome the problems of the image noises and non-uniform intensity of the images. For detecting various sizes of line-like regions, an image pyramid is constructed based on different neighboring distances, which enables the proposed filter to analyze different sizes of regions independently. Experimental results showed that the proposed line filter can well segment various sizes of line-like regions in the X-ray/CT images, which are with image noises and non-uniform intensity problems.

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Bracket base remnants after orthodontic debonding

The Angle Orthodontist ◽

10.2319/121112-930.1 ◽

2013 ◽

Vol 83 (5) ◽

pp. 885-891 ◽

Cited By ~ 7

Author(s):

Matteo Zanarini ◽

Antonio Gracco ◽

Monica Lattuca ◽

Silvia Marchionni ◽

Maria Rosaria Gatto ◽

...

Keyword(s):

Energy Dispersive ◽

Scanning Electron Micrographs ◽

X Ray ◽

Significant Difference ◽

Group A ◽

Fixed Appliances ◽

Group B ◽

Imagej Software ◽

Bracket Base ◽

Scanning Electron

ABSTRACT Objective: To evaluate whether the debonding procedure leads to restitutio ad integrum of the enamel surface by investigating the presence of enamel within the bracket base remnants after debonding. Materials and Methods: Sixty patients who completed orthodontic treatment with fixed appliances were included. A total of 1068 brackets were microphotographed; the brackets presenting some remnants on the base (n = 818) were selected and analyzed with ImageJ software to measure the remnant area. From this population a statistically significant sample (n = 100) was observed under a scanning electron microscope to check for the presence of enamel within the remnants. Energy dispersive x-ray spectrometry was also performed to obtain quantitative data. Results: Statistically significant differences in the remnant percentage between arches were observed for incisor and canine brackets (P < .0001 and P = .022, respectively). From a morphologic analysis of the scanning electron micrographs the bracket bases were categorized in 3 groups: group A, bases presenting a thin enamel coat (83%); group B, bases showing sizable enamel fragments (7%); group C, bases with no morphologic evidence of enamel presence (10%). Calcium presence was noted on all evaluated brackets under energy dispersive x-ray spectrometry. No significant difference was observed in the Ca/Si ratio between group A (16.21%) and group B (18.77%), whereas the Ca/Si ratio in group C (5.40%) was significantly lower than that of the other groups (P < .323 and P = .0001, respectively). Conclusion: The objective of an atraumatic debonding is not achieved yet; in some cases the damage could be clinically relevant.

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BMSCs Seeding in Different Scaffold Incorporation with Hyperbaric Oxygen Treat Seawater Immersed Bony Defect

10.21203/rs.3.rs-44123/v3 ◽

2021 ◽

Author(s):

gan zhang ◽

Xiaosong Chen ◽

Xunsheng Cheng ◽

Xiuwu Ma ◽

Congcong Chen

Keyword(s):

Bone Formation ◽

Bone Defect ◽

Medullary Canal ◽

Bony Defect ◽

New Bone Formation ◽

X Ray ◽

New Zealand White Rabbits ◽

Group A ◽

Group B ◽

Group D

Abstract Introduction: The experiment was undertaken to estimate the effect of BMSCs seeding in different scaffold incorporation with HBO on the repair of seawater immersed bone defect. And future compared n-HA/PLGA with β-TCP/PLGA as scaffold in treatment effect of seawater immersed bone defect.Methods: 60 New Zealand White rabbits with standard seawater defect in radius were randomly divided to group A (implant with nothing), group B (implanted with atuogenous bone), group C (implanted with n-HA/PLGA/BMSCs, and Group D ( implanted with β-TCP/PLGA/BMSCs). After implant, each rabbit receive HBO treatment at 2.4 ATA 100% oxygen for 120 minutes per day for 2 weeeks. Radiograph, histological and biomechanical examination were used to analyze osteogenesis.Result: X-ray analysis show that n-HA/PLGA/BMSCs and β-TCP/PLGA/BMSCs could accelerate the new bone formation, and the new bone formation in group C was lager than in group D or group A, and close to group B (P<0.05). After 12 weeks, in group A, defect without scaffold show a loose connect tissue filled in the areas. The medullary canal in group B was recanalizated. Defect in group C and D show a larger number of wove bone formation. The new wove bone formation in defect areas in group C was lager than D. The mechanical examination revealed ultimate strength at 12 weeks were group D>group C>group B>group A(P<0.05).Conclusion: Scaffold of n-HA/PLGA and β-TCP/PLGA incorporation with HBO and BMSCs were effective to treat seawater immersed bone defect, and n-HA/PLGA was more excellent than β-TCP/PLGA.

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Comparison of Different Diagnostic Method for Mycobacteria Tuberculosis in Suspected Patients

Journal of Nepal Health Research Council ◽

10.3126/jnhrc.v7i2.3012 ◽

1970 ◽

Vol 7 (2) ◽

pp. 84-88

Author(s):

AR Khagi ◽

S Singh ◽

S Subba ◽

A Bajracharya ◽

R Tuladhar ◽

...

Keyword(s):

Comparative Study ◽

Sputum Smear ◽

Study Group ◽

Bacterial Cells ◽

X Ray ◽

Smear Examination ◽

Group A ◽

Chest X Ray ◽

Group B ◽

Sputum Smear Examination

Background: Microbial examination of smear of AFB by Z-N stain is currently the most rapid method for the detection of M. tuberculosis but its sensitivity is low i.e. required at least 10,000 bacterial cells per ml of sputum and also none specific, but auramine staining method has higher sensitivity than that of the Z-N stain but there are chances of false positive. Objective of this study was to find the correlation between chest X-ray, direct sputum smear examination by Ziehl-Neelsen stain, Auramine fluorochrome stain and sputum culture for M. tuberculosis. Methods: During that study period 250 x 3 samples were taken three each from 250 patients and divided into two groups A and B by performing Auramine fluorochrome stain in all samples . In group A, there were 150 fluorochrome stain positive samples. One each from 150 patient for comparative study of direct sputum smear examination by Ziehl-Neelsen stain, , culture on LJ medium and chest X-ray. Similarly in group B, next 100 fluorochrome stain negative specimens one each from 100 patients were taken for the comparative study of direct sputum smear examination by Ziehl-Neelsen stain, culture and chest X-ray. Results: In the study group A (n=150) all the specimens were positive in Auramine fluorochrome stain and all of them show positive in X-ray but only 134 showed positive in Ziehl-Neelsen stain and 136 showed positive in culture. In the study group B (n=100), all the specimens were negative in Auramine fluorochrome stain and all of them show negative in Ziehl-Neelsen stain but 14 of them were positive in culture and 24 were positive in chest X-ray. Conclusions: The diagnosis of PTB could be made by Auramine fluorochrome microscopy and culture. Key words: auramine fluorochrome stain; culture; mycobacterium tuberculosis; x-ray; ziehl-neelsen. DOI: 10.3126/jnhrc.v7i2.3012 Journal of Nepal Health Research Council Vol.7(2) Apr 2009 84-88

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CLINICAL STUDY ON SHIREESHADI AVAPEEDANA NASYA IN THE MANAGEMENT OF SURYAVARTHA (FRONTAL SINUSITIS)

November 2020 - International Ayurvedic Medical Journal ◽

10.46607/iamj0909082021 ◽

2021 ◽

Vol 9 (8) ◽

pp. 1654-1658

Author(s):

Amarnath H K

Keyword(s):

Clinical Study ◽

Economic Status ◽

Age Groups ◽

Frontal Sinusitis ◽

Nasal Blockage ◽

X Ray ◽

Group A ◽

Foul Smell ◽

Group B ◽

Clinical Conditions

Nasya karma is considered a prime treatment modality in all types of Shiroroga (Headache) and also in Suryavar- tha (Frontal Sinusitis). Suryavartha (Frontal Sinusitis) is one of the 11 types of Shiroroga. It is one of the com- mon clinical conditions found in day to day general as well as Shalakya (ENT) practice. It presents with headache as one of its cardinal features and its occurrence is found in both genders and in all age groups. Objective: To study the efficacy of Shireeshadi Avapeedana Nasya in the management of Suryavartha (Frontal Sinusitis). Ma- terial methods: Twenty patients of Suryavartha (Frontal Sinusitis) were diagnosed and registered for the clinical study irrespective of sex, socio-economic status, and religion. The study was divided into two groups - Group A and Group B. Group – A patients were treated with Shireeshadi Avapeedana Nasya for 7 days and Group – B patients were treated by Nasya with milk for 7 days. Observation and result: Among 20 patients of Suryavartha / frontal sinusitis, 20 (100%) of patients had headache, 11 (55%) had nasal blockage, 05 (25%) had nasal dis- charge, 08 (40%) had foul smell in their breath and 14 (70%) have variations from normal X-Ray. The severity of headache is significantly reduced after treatment in both Groups A and B (92.95% and 73.07%) respectively. Conclusion: Administration of Shireeshadi Avapeeda Nasya showed statistically significant improvement in the management of Suryavartha (Frontal Sinusitis). Keywords: Suryavartha, Nasya, Shireeshadi Avapeedana Nasya, Frontal Sinusitis, Shigru, Mulaka, Ksheera.

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X-Ray and Near-Infrared Spectroscopy of Dim X-Ray Point Sources Constituting the Galactic Ridge X-Ray Emission

Acta Polytechnica CTU Proceedings ◽

10.14311/app.2014.01.0222 ◽

2014 ◽

Vol 1 (1) ◽

pp. 222-226

Author(s):

Kumiko Morihana ◽

Masahiro Tsujimoto ◽

Ken Ebisawa

Keyword(s):

Near Infrared ◽

Cataclysmic Variables ◽

Point Sources ◽

X Ray ◽

Nir Imaging ◽

Group A ◽

Field L ◽

Imaging And Spectroscopy ◽

Group B ◽

Thermal Sources

We present the results of X-ray and Near-Infrared observations of the Galactic Ridge X-ray Emission (GRXE). We extracted 2,002 X-ray point sources in the Chandra Bulge Field (l =0°.113, b = 1°.424) down to ~10-14.8 ergscm-2s-1 in 2-8 keV band with the longest observation (900 ks) of the GRXE. Based on X-ray brightness and hardness, we classied the X-ray point sources into three groups: A (hard), B (soft and broad spectrum), and C (soft and peaked spectrum). In order to know populations of the X-ray point sources, we carried out NIR imaging and spectroscopy observation. We identied 11% of X-ray point sources with NIR and extracted NIR spectra for some of them. Based on X-ray and NIR properties, we concluded that non-thermal sources in the group A are mostly active galactic nuclei and the thermal sources are mostly white dwarf binaries such as cataclysmic variables (CVs) and Pre-CVs. We concluded that the group B and C sources are X-ray active stars in flare and quiescence, respectively.

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Single-Port Endoscopic Sentinel Lymph Node Biopsy Combined with Indocyanine Green and Carbon Nanoparticles in Breast Cancer: A Retrospective Cohort Study

10.21203/rs.3.rs-171083/v1 ◽

2021 ◽

Author(s):

Zi-Han Wang ◽

Tian-Ran Gang ◽

Shan-Shan Wu ◽

Can Lu ◽

Guo Xuan-Gao ◽

...

Keyword(s):

Breast Cancer ◽

Lymph Node ◽

Sentinel Lymph Node ◽

Carbon Nanoparticles ◽

Detection Rate ◽

Single Port ◽

Lymph Node Biopsy ◽

Node Biopsy ◽

Group A ◽

Group B

Abstract PurposeIndocyanine green (ICG) is an efficient tracer method used in sentinel lymph node biopsy (SLNB). The application of single-port endoscopic-assisted technology in the field of breast cancer is widely accepted. In order to explore the surgical safety of single-port endoscopic-SLNB (SPE-SLNB) and the reliability of axillary staging, we combined it with ICG that was excited by near-infrared fluorescence endoscopy and carbon nanoparticles (CN) as a tracer and compared this method to conventional open SLNB (C-SLNB).MethodsSixty patients with early breast cancer were recruited and divided into three groups. Twenty patients who underwent SPE-SLNB combined with ICG and CNs were placed in group A. Twenty patients who underwent SPE-SLNB with CNs only were placed in group B. Twenty patients who underwent C-SLNB with ICG and CNs were placed in group C.ResultsThe detection rate of SLNs was 100% in group A, 100% in group B, and 95% in group C. In total, 97 SLNs were detected in group A, 65 SLNs were detected in group B, and 98 SLNs were detected in group C . ConclusionThe novel technique of combining ICG and CNs with SPE-SLNB and the utilization of the endoscopic fluorescence imaging system achieved the same detection rate and mean number of SLNs as C-SLNB. Therefore, for patients who meet the indications, SPE-SLNB is as safe and reliable as C-SLNB.

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