scholarly journals Fast algorithm for the determination of the optimum filter for bone SPECT image reconstruction

2021 ◽  
Author(s):  
Afef houimli ◽  
Issam benmhammed ◽  
Bechir letaief ◽  
Dorra Ben-Sellem
Keyword(s):  
Processing Time ◽  
Second Step ◽  
Spect Image ◽  
Simultaneous Reconstruction ◽  
Bone Spect ◽  
The Difference ◽  
Butterworth Filters ◽  
Suitable Technique

Abstract In SPECT, the reconstructed images are strongly affected by poisson noise, poor spatial resolution and bad contrast due to the radioactivity disintegration and procedures acquisition. In this paper, we propose an algorithm to improve the traditional FBP reconstruction and to choose the most suitable technique for bone SPECT image denoising. The proposed approach is composed of two steps. The first one consists of denoising the acquired sinograms using successively eight currently used filters in nuclear medicine: Wiener, Metz, Hamming, Hann, Shepp-Logan, Parzen, Butterworth and Gaussian combined with Butterworth filters. The second step is a simultaneous reconstruction of the axial slices using a new 3D FBP algorithm for each filter. A comparative study of these filters is tested and evaluated on a dataset containing thirty one bone SPECT image. The results show that the difference between these filters is statistically significantly different from each other (p<0.05) and the 3D FBP with the combination between Butterworth and Gaussian provide the best performance. The selected method is compared to three denoising methods. These methods are tested on a Shepp Logan phantom and bone SPECT images. Experimental results show that the 3D FBP reconstruction with the pre-processing combination (Gaussian (Std=0.3) + Butterworth (fc=0.47, ordre=3)) filter is more accurate and robust compared to other methods. It provides the highest performance in term of contrast, SNR, CNR ensuring a shorter processing time. It accelerates the reconstruction, reduces noise and artifacts while preserving detailed features. This approach could be considered as a valuable candidate to enhance the quality of the reconstructed bone SPECT image.

scholarly journals Internet Financial Reporting: Studi Komparasi Bank Umum Syariah Di Indonesia Dan Malaysia

2017 ◽  
Vol 3 (11) ◽  
pp. 886
Author(s):  
Taqiyah Dinda Insani ◽  
Noven Suprayogi
Keyword(s):  
Financial Reporting ◽  
Secondary Data ◽  
Reporting Quality ◽  
T Test ◽  
Quantitative Approach ◽  
Financial Reporting Quality ◽  
Islamic Banks ◽  
The Difference

The purpose of this study was to determine the differences of Internet Financial Reporting Quality. This study was using quantitative approach with independent sample t test and mann whitney u test. The population of this study was official website of islamic banks in Indonesia and Malaysia. determination of the number of samples using (sampling jenuh), where all of the population is used as a sampel. Data that being used was secondary data. The data was collected from official website of the sentral banks in each country. The result of this study showed that there was significant differences of Internet Fianncial Reporting Quality between Indonesia and Malaysia. The difference is caused there are significant differences between the quality of content and timeliness components. Meanwhile, there is no differences between technology and user support components.

scholarly journals Quantitative and Qualitative Improvements in DNA Extraction Procedures Using a Bronopol™ Tablet in Alpine Goat Milk.

2018 ◽  
Author(s):  
Ashley Newton ◽  
Amber L. Martin ◽  
Yonathan Tilahun ◽  
Steve Zeng
Keyword(s):  
Dna Extraction ◽  
Somatic Cells ◽  
Goat Milk ◽  
Extraction Methods ◽  
Preservation Solution ◽  
Capra Aegagrus ◽  
The Difference ◽  
Dna Extraction Methods

Abstract Preservation of milk is important as it relates to Capra aegagrus hircus (Alpine goat) milk DNA extraction. We examined the difference in concentration and quality of DNA resulting from the use of a preservation tablet (BronopolTM) versus a preservation solution by Norgen Biotek. When examining the concentration and quality of DNA in goat milk for studies using somatic cells from goat milk, it is ideal to use a substance that has a long-term preservation potential. The concentrations and quality of DNA obtained from goat milk was compared. Two separate trial samples of Alpine goat milk were obtained. The preservation tablet commonly known as B-14 or Bronopol™ was dissolved into one sample of milk. Another sample of goat milk without a tablet used a preservation solution from a Norgen Biotek. All DNA extraction methods followed the Norgen Biotek Corp. manufacturer's protocol. DNA quantity and quality was analyzed using a Thermo Scientific NanodropLite spectrophotometer. The study showed that the traditional Bronopol™ was a better method of preserving and maintaining the integrity of DNA in the somatic cells that are present in Alpine goat milk. This is based on the results obtained following determination of quantity and A260/A280 readings for quality assessment. Thus, the use of Bronopol™ is the preferred method of preserving goat milk for DNA extraction.

scholarly journals Determination of Bone SPECT Image Reconstruction Conditions in the Head and Neck Region

2021 ◽  
Vol 77 (7) ◽  
pp. 700-709
Author(s):  
Naoya Hayashi ◽  
Ryotaro Tokorodani ◽  
Shuji Kenda ◽  
Daisuke Ogasawara ◽  
Fumika Yabe ◽  
...  
Keyword(s):  
Image Reconstruction ◽  
Head And Neck ◽  
Neck Region ◽  
Head And Neck Region ◽  
Spect Image ◽  
Bone Spect

scholarly journals Determination of Saponin Content in Hang Maidong and Chuan Maidong via HPLC-ELSD Analysis

2016 ◽  
Vol 2016 ◽  
pp. 1-5 ◽  
Author(s):  
Xian-En Li ◽  
Yu-Xia Wang ◽  
Peng Sun ◽  
Deng-Qun Liao
Keyword(s):  
Biochemical Assay ◽  
Saponin Content ◽  
Ophiopogon Japonicus ◽  
The Difference ◽  
Fibrous Roots

Zhejiang and Sichuan are regarded as two genuine producing areas of Ophiopogonis radix in China. To study the difference in the quality of Ophiopogonis radix from these two places, the contents of three reported bioactive saponins, that is, ophiopogonins B, D, and D′, in tubers and fibrous roots ofOphiopogon japonicusfrom Cixi city of Zhejiang and Santai county of Sichuan were quantified using HPLC-ELSD method and compared. Ophiopogonin B and ophiopogonin D′ content in tubers of HMD were higher than those in radix of CMD, whereas ophiopogonin D in HMD was about twice lower than that of CMD. Three ophiopogonins were all detected in fibrous roots of both HMD and CMD. Their averaged content in fibrous roots of CMD was about twice higher than that in tubers of CMD. Ophiopogonin D in fibrous roots of CMD was about five times higher than that of HMD. Our biochemical assay revealed that fibrous roots and tubers of CMD can be of an important saponin source, especially for ophiopogonin D.

scholarly journals A Methodology to Derive Radar Reflectivity–Liquid Equivalent Snow Rate Relations Using C-Band Radar and a 2D Video Disdrometer

2010 ◽  
Vol 27 (4) ◽  
pp. 637-651 ◽  
Author(s):  
Gwo-Jong Huang ◽  
V. N. Bringi ◽  
Robert Cifelli ◽  
David Hudak ◽  
W. A. Petersen
Keyword(s):  
Power Law ◽  
Winter Season ◽  
Apparent Volume ◽  
Separation Distance ◽  
Radar Reflectivity ◽  
Spherical Diameter ◽  
Fall Speed ◽  
The Difference

Abstract The objective of this work is to derive equivalent radar reflectivity factor–liquid equivalent snow rate (Ze–SR) power-law relations for snowfall using the C-band King City operational weather radar and a 2D video disdrometer (2DVD). The 2DVD provides two orthogonal views of each snow particle that falls through its 10 cm × 10 cm virtual sensor area. The “size” parameter used here for describing the size distribution is based on the “apparent” volume computed from the two images, and an equivolume spherical diameter Dapp is defined. The determination of fall speed is based on matching two images corresponding to the same particle as it falls through two light planes separated by a precalibrated separation distance. A new “rematching” algorithm was developed to improve the quality of the fall speed versus Dapp as compared with the original matching algorithm provided by the manufacturer. The snow density is parameterized in the conventional power-law form , where α and β are assumed to be variable. To account for strong horizontal winds that tend to decrease the measured concentrations from the 2DVD, a third parameter γ is introduced. The methodology estimates the three parameters (α, β, and γ) by minimizing the difference between the radar-measured reflectivity and the equivalent reflectivity computed from the 2DVD in a least squares sense. The optimally determined values of α, β, and γ are used to estimate the SR and the coefficient and exponent of the Ze = a(SR)b relation. For validation, the accumulation from the SR is compared with the manually recorded accumulations from the double-fence international reference (DFIR) gauge. The data were collected during the Canadian Cloudsat Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) Validation Project (C3VP) conducted in Ontario, Canada, during the 2006/07 winter season. A total of seven snow days were analyzed and the accumulation intercomparisons gave a fractional standard deviation of 26% and normalized bias 2.1%. The range of the a and b values for the seven days appear reasonable and similar to conventional Ze–R relations.

scholarly journals The Use of the Generalized Linear Model to Assess the Speed and Uniformity of Germination of Corn and Soybean Seeds

Agronomy ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 588
Author(s):  
Deoclecio Jardim Amorim ◽  
Amanda Rithieli Pereira dos Santos ◽  
Gabriela Nunes da Piedade ◽  
Rute Quelvia de Faria ◽  
Edvaldo Aparecido Amaral da Silva ◽  
...  
Keyword(s):  
Generalized Linear Model ◽  
Linear Models ◽  
Soybean Seeds ◽  
Link Function ◽  
Physiological Quality ◽  
The Difference ◽  
The Times ◽  
Binomial Response

The use of seeds with high physiological quality allows rapid growth and establishment of seedlings in the field to be obtained. Therefore, the accuracy of the information obtained during the determination of the physiological quality of seeds is of great importance. The objective was to use generalized linear models, investigating which link function (Probit, Logit and Complementary log-log) is suitable to predict T50 and uniformity during germination of soybean and corn seeds. To perform the experiments, we used seeds from five commercial hybrids and/or cultivars of corn and soybean. The germination speed was calculated by counting the germinated seeds and the results were expressed in the form of proportions. Germination uniformity was calculated by the difference in the times required for germination. The best model was selected according to the criteria of the test of Deviance, AIC and BIC. The Logit model showed accurate results for most cultivars. The evaluation of germination in the form of proportions considering the assumption of binomial response is satisfactory, and the choice of the link function is dependent on the characteristics of each lot and/or species evaluated. The use of this methodology makes it possible to estimate any germination time and uniformity.

scholarly journals Determination of residual strain in steel wire cord by chemical method

2019 ◽  
pp. 72-75
Author(s):  
N. A. Zmeeva
Keyword(s):  
Residual Strain ◽  
Chemical Method ◽  
Steel Wire ◽  
Metal Wire ◽  
Residual Strains ◽  
The Wire ◽  
The Difference ◽  
Strength And Durability

The article presents a method for determining the residual strain in the steel wire cord of construction 3x0,30. The causes of residual strain, the effect on the quality of finished product and the determination of the degree of residual strain by chemical method are considered. The cause of residual strain is uneven plastic deformation of a solid body due to various changes in different places of its length and volume. Residual strain of steel wire cord are made up of stresses existing in the wire after drawing, and the stresses created during the lay of wire.An important task in the framework of the metal wire cord manufacturing technology, which is faced by specialists at «BMW» – the Management Company of the Holding «BMC» is to reduce residual strains at all stages of metal wire cord manufacturing. Residual strains are an additional factor affecting the adhesive strength and durability of adhesive joints.The principle of determining the residual strains is to remove the coating from the metal wire cord, paint the transverse halves of each thread. Then the filaments are impregnated with nitric acid, and the residual strain on the surface is recorded as the difference between the residual strains of the two halves of the wire.

scholarly journals Assessment of wing deformation influence on airload determination at the initial design stages

2020 ◽  
Vol 21 (3) ◽  
pp. 166-174
Author(s):  
Sergey V. Baranovski ◽  
Konstantin V. Mikhaylovskiy
Keyword(s):  
Polymer Composite ◽  
Parametric Modelling ◽  
Structural Element ◽  
Critical Elements ◽  
Urgent Task ◽  
The Difference ◽  
Wing Deformation ◽  
Composite Wing

At designing aircraft, much attention is given to the wing, as one of the most critical elements of the airframe. It is necessary to have a clear-eyed outlook at response sequence, efficiency of various factors and calculation features on the receipt timing and quality of the result. In addition, the design of a structural element is a complex multidisciplinary task affecting various fields of science, which is complicated by the use of polymer composite materials. In the furtherance of solving the urgent task of the methods of designing of a polymer composite wing, it is necessary to determine the influence of wing deformation on the airload used in the calculation and determination of product parameters. Methods of designing of a polymer composite wing used at the initial stages and taking into account the choice of the external appearance, justification of the structural arrangement and load-bearing elements. The paper considers the flow of air over the wing of a passenger airliner and analyzes the pressure values for various flight modes. A comparison is made of the initial theoretical wing surface and deformed during flight, and the difference in loading of the considered options is determined. A future methodology of polymer composite wing design based on parametric modelling will take these results into account and make use of them.

Flexible biomedical RF sensors to quantify the purity of medical grade glycerol and glucose concentrations

2019 ◽  
Vol 12 (2) ◽  
pp. 120-130 ◽  
Author(s):  
N. K. Tiwari ◽  
S. P. Singh ◽  
D. Mondal ◽  
M. Jaleel Akhtar
Keyword(s):  
Glucose Concentration ◽  
Food Industry ◽  
Coplanar Waveguide ◽  
Resonant Frequencies ◽  
Biomedical Industry ◽  
The Difference ◽  
Flexible Radio ◽  
Polyester Film

AbstractA novel flexible radio frequency (RF) sensor is designed to facilitate the accurate testing of various samples used in the biomedical industry at the industrial, scientific and medical (ISM) frequency band. The proposed RF biosensor comprises a liquid channel-loaded interdigitated capacitor, which is integrated on a coplanar waveguide structure. The prototype of the sensor is fabricated on a 0.13 mm thin biodegradable polyethylene terephthalate polyester film to perform the testing of various bio-graded samples by recording the corresponding resonant frequency. It is observed that there is a noticeable change between the measured resonant frequencies of these samples, which primarily occurs due to the difference in their dielectric properties. The designed sensor was used to monitor and investigate the quality of glycerol, which is the most commonly used raw ingredient in the biomedical and food industry. The determination of glucose concentration in base fluids is considered to ease the challenges faced by doctors and biochemists regarding the monitoring of glucose concentration. It is found that the proposed sensor can quantify the glycerol purity up to the minimum specified adulteration level of 2 and 1% corresponding to toxic contaminants diethylene glycol and ethylene glycol, respectively, and the glucose concentration of 0.5 mg/ml.

scholarly journals Correlation Analysis of Compounds in Essential Oil of Amomum tsaoko Seed and Fruit Morphological Characteristics, Geographical Conditions, Locality of Growth

Agronomy ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 744
Author(s):  
Guodong Li ◽  
Qinwei Lu ◽  
Jingjian Wang ◽  
Qingyu Hu ◽  
Pinghui Liu ◽  
...  
Keyword(s):  
Essential Oil ◽  
Correlation Analysis ◽  
Morphological Characteristics ◽  
Biomass Accumulation ◽  
Perennial Herb ◽  
Qualitative And Quantitative Analysis ◽  
Morphological Variations ◽  
The Difference

Amomum tsaoko is a perennial herb belonging to Zingiberaceae. Its dried ripe fruit is an important food additive, spice and materia medicai in Southeast Asia. For hundreds of years of cultivation, morphological variations have existed. The essential oil is one of the major active products of the A. tsaoko fruit and seed. In this study, we collected 12 populations in Yunnan province, and the correlation analysis of compounds was focused on the essential oil of A. tsaoko seed and its fruit morphological characteristics, geographical conditions, and locality of growth. The results showed that the difference in morphological characteristics between populations is greater than the difference within the population. High altitude areas are beneficial for biomass accumulation. Another interesting finding is that selecting specific functional or odor type materials could reference the morphologies of A. tsaoko fruit and seed. Furthermore, the qualitative and quantitative analysis of compounds in essential oil could be used to distinguish the producing area of the A. tsaoko fruit. These results are crucial in realizing the determination of botanical origin and evaluating the quality of A. tsaoko fruit. Meanwhile, it makes clear that various other studies on this plant deserve more attention.

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