The World Radiography Day Conference

RSU-WRD Conference Schedule 2022

Gunjanaporn Tochaikul — Thu, 03 Nov 2022 09:00:38 SE Asia Standard Time

RSU-WRD Conference Schedule 2022

Optimal Exposure Technique for Chest AP Semi-erect Radiographs Through Glass Barriers Using Portable X-ray Machine

Thu, 17 Nov 2022 10:41:20 SE Asia Standard Time

A portable chest x-ray through glass has been used during the COVID-19 pandemic to reduce the risk of infection. This study aimed to determine the optimal exposure technique for chest AP semi-erect x-ray through glass with a 0.5 cm thickness by using a portable x-ray machine and surveying the amount of scattered radiation. An anthropomorphic phantom was used during chest x-ray through the glass and without glass by the same exposure technique during 90-120 kVp with SID 270 cm. A phantom was placed on a wooden wedge with a 45-degree angle. The entrance skin dose (ESD) measurements were performed with an OSL NanoDot dosimeter. The scattered radiation that occurred inside and outside the room was measured with a survey meter. All radiographs were evaluated as a quantitative and qualitative assessment of the image quality. The results showed that the optimal exposure technique for chest AP semi-erect x-ray through glass at SID 270 cm were 100 kVp 5 mAs and 110 kVp 3.2 mAs. When compared with chest x-ray without glass, the amount of entrance skin dose was reduced by 63.16% and 59.76%, respectively. The qualitative assessment from three experienced radiographers, found the image quality score of the chest x-ray through glass image was around 4.47 and 4.33, respectively, meaning that chest film showed a good level of agreement in the interpretation and sufficient for diagnosis. The amount of scattered radiation that occurred at a distance of 1 m to the left side of the phantom inside the room was lowest at a 90-degree angle, and on the left side of the x-ray tube outside the room, the amount of scattered radiation was lowest at a 45-degree angle. However, there is a general recommendation for radiographer to wear a lead apron and standing in an appropriate position during a radiographic examination to prevent the effect of scatter radiation.

Evaluation of Thickness and Texture of the Clavicle Bone by Radiogrammetric Method on Chest Radiographs

Thu, 24 Nov 2022 00:00:00 SE Asia Standard Time

Chest x-rays examination is commonly used to investigate abnormalities in the chest cavity. Chest films are also able to detect internal organs and nearby organs disorders, especially the clavicle bone which are found to be common fracture risk. Clavicular fracture was accounted around 5 to 10% of all fractures. Therefore, the objective of the study was to evaluate the thickness and texture of the clavicle bone by using radiogrammetric method on chest radiographs. The population sample consisted of 120 healthy adult volunteers, (60 males, 60 females) aged from 24 to 76 years. Then, posteroanterior (PA) chest radiographs were taken. Measurements of clavicle thickness were evaluated at the midshaft of both clavicles and texture analysis were calculated from grey level co-occurrence matrix (GLCM). The results showed the average of the percentage of combined cortical thickness in both clavicles (CL-CCT) of the female group was 53.93 %, while in male, which was fewer 46.69 % (p-value<0.05). For the age group under 61 years, CL-CCT was 52.91 %, while in the age group older than 61 years, which were fewer 46.15% (p-value<0.05). A thinning of clavicle cortical thickness tended to decrease with increasing age (R2=0.113). According to the body mass index (BMI) classifications and the location of clavicles (left and right side), there was no significant difference in the thickness of the clavicle cortex between the inner and outer surfaces. In terms of texture analysis using GLCM, it was found that the average of the angular second moment and the inverse difference moment of males were higher than females. The mean of the contrast and the entropy was lower in male group than female group (p-value<0.05). However, in the different age groups and BMI classifications showed no significant difference in texture features. In conclusion, clavicle radiogram showed a gradual thinning of the clavicle cortex. By comparison, gender differences related to the clavicle cortical thickness and the angular second moment, the contrast, the inverse difference moment, and the entropy values from GLCM image analysis. The thickness of clavicle cortex tended to decrease with increasing age.

The invention of Silicone-based Wearable Breast Model for Training Skills in Mammography Positioning

Chiraporn Pinpo, Supissara Buncham, Sompratthana Patukkhinang, Ausanai Prapan — Thu, 24 Nov 2022 08:49:39 SE Asia Standard Time

Introduction: Mammography plays a vital role in detecting breast lesions. However, mammographic positioning requires the expertise and great skill of the medical staff. Moreover, the skill training of medical staff on live patients is still inconvenient. Therefore, simulation-based training using phantom is necessary. Objectives: To invent a vest-style breast phantom to be used for practicing mammographic positioning. Methods: Firstly, the samples were constructed into 2 samples in various concentrations of silicone rubber and silicone oil, and then was selected one sample which had the nearest young’s modulus of breast tissue to fabricate a model. The breast model was constructed in a fiberglass mold and then cut out in vest style. The skin of the breast model was constructed by using only silicone rubber. After that, 25 women who are 2nd and 3rd -year students in radiological technology were requested to evaluate a pre-post training skill as well as their satisfaction level. Results: The vest-style silicone-based breast models were successfully constructed which represent a soft and elastic texture, stable at room temperature, and nearly like young’s modulus of breast tissue. The evaluation of our breast model was a good training model resulting in significantly increased practicing skills after using our breast model (p <0.05). Moreover, overall breast model appearance and pilot testing showed a very good level of satisfaction. Conclusions: Our silicone-based wearable breast model can be used as a training tool for practicing mammographic positioning.

A Study of Focal Spot Size Measurement of Diagnostic X-ray Tube with Slit Camera Using CR and DR Imaging Plates

Chanadda Sukumoljan, Rarisa Sonbunkert, Manus Mongkolsuk — Thu, 24 Nov 2022 08:50:54 SE Asia Standard Time

The aim of the research proposal was to measure the apparent focal spot size of a diagnostic x-ray tube with a slit camera using CR and DR imaging plates. The slit camera is PTW-Freiburg model L659117 will be used. X-ray images of the slit camera obtained from x-ray unit 1 and unit 2 will be analyzed by imageJ software.The apparent focal spot will be calculated using the FWHM value of the slit image known as MFS. MFS will be compared with the nominal focal spot (NFS) size.The satisfaction is specified by the NEMA standard. The comparison between the result from different imaging plates, CR and DR, will be performed as well.

Study the Properties of BaSO4 in Silicone Rubber for the Developing of Diagnostic Radiation Shielding in X-ray Energy 60-80 keV

Chaniporn Kamma, Pichanika Kloysang, Pemiga sengsan, Nutthapong Moonkum — Thu, 24 Nov 2022 08:52:04 SE Asia Standard Time

In medicine, x-rays are used in the diagnosis and treatment of diseases but if used carelessly, X-rays can be harmful. Currently, the x-ray shielding material are often made from lead, which has good x-ray shielding properties. However, lead is highly toxic, heavy and is not environmentally friendly. The aim of this research was to study the properties of barium sulfate (BaSO4) as an element in silicone rubber for the development of diagnostic radiation shielding devices in X-ray energy levels of 60-80 keV by mixed as 5 ratio and was tested for its ability of radiation absorption. From the experiment, it is expected that the x-ray shielding material will have good x-ray shielding properties including this research will be obtained lead-free radiation shielding materials, less toxic and friendly with environment.

A Comparison of Understanding, Belief about Osteoporosis and Bone Mineral Density in Lakhok Community

Witchayada Chawkhaodin, Podjana Ruengdach, Gunjanaporn Tochaikul — Thu, 24 Nov 2022 08:53:33 SE Asia Standard Time

Nowadays, osteoporosis is one of the most common diseases in elderly. It considered to be a silent killer because it has no early symptoms, it can be detected only when fracture occurred. In Thailand, most of people in countryside community does not have enough knowledge about osteoporosis that led to unawareness behaviors. So, “the osteoporosis knowledge campaign” was established for increasing the knowledge to young adult and elderly people live in Lakhok Pathumthani, Thailand. The purpose of this study was to comparison the understanding, believing about osteoporosis and bone mineral density (BMD) value between before and after attended to the campaign. First, the 96 volunteers were answer the questionnaire then measured a BMD value by using quantitative ultrasound (QUS) (ALOKA AOS-100SA, Hitachi, Japan) After the measured, the volunteers were answer the same questionnaire about understanding and believing. The scores comparison was done. As expected, the results showed an average score of understanding and believing after attended the comparison was increase 81.23% and 15.92%, respectively. Therefore, we hypothesized that knowledgement, understanding and belief of osteoporosis will support the changing routine behaviors of people in community which can help to maintain the bone mineral density more than people who did not know the consequences of osteoporosis disease.

Evaluation of Cell Viability on Endothelial Cells to Iodinated Contrast Media

Thu, 24 Nov 2022 08:54:38 SE Asia Standard Time

In medicine, iodine contrast media agents are used to help in diagnostic such as intravenous injection and oral cavity for show the differentiation of tissues and lesions. However, the iodine contrast media can cause an allergic reaction if used carelessly. The objective of this research was to study the effects of iodine contrast media on cell cycle and oxidative stress in the endothelial cell line. This research are experimental in four commercial iodine contrast media at concentration of 2.5,5 and 10 mgl/mL at 24 hours compared to the control group. From this research, it will be known the cellular risk and early indicators after treated with iodine contrast media. Moreover, the effect of iodine contrast media on the cell cycle and oxidative stress in the endothelial cell line can be biomarkers of cellular or biological changes. It can be used to predict at the cellular level as well as disseminate it to healthcare professionals involved in radiology.

Quality control software for diagnostic x-ray machine

Jaruwan Wongyai, Kornkanok Hindam, Manus Mongkolsuk — Thu, 24 Nov 2022 08:55:40 SE Asia Standard Time

The aim of the research proposal was to design and construct quality control software for diagnostic x-ray machines (XQCS) using Microsoft Excel. The quality control data consist of measuring data obtained from the collimator & beam alignment, exposure time, tube voltage, focal spot size, linearity, reproducibility, and beam quality (HVL). Microsoft Excel has widespread used and enables to format, organize, and calculate data in a spreadsheet. The XQCS will be validated before being used. The volunteers, not less than 30 Radiological Technology students from Rangsit University, will evaluate the satisfaction of using XQCS.

A Study of Quality Control for the Diagnostic X-ray Machines at the Faculty of Radiological Technology, Rangsit University

Yawakul Masong, Nasrin Wangoh, Manus Mongkolsuk — Thu, 24 Nov 2022 09:04:24 SE Asia Standard Time

The aim of the research proposal was to evaluate the quality of two diagnostic x-ray machines that have been in use for 7 years of teaching at the Faculty of Radiological Technology since 2016. These parameters such as collimator & beam alignment, exposure time, tube voltage, focal spot size, linearity, reproducibility, and beam quality (HVL) will be performed according to the NCRP no.99 and the quality standards of medical diagnostic x-ray machines by the Department of Medical Sciences, Ministry of Public Health, THAILAND. Descriptive statistics will be used to evaluate the data of those parameters. The information obtained is part of it that can be used to assess the condition of the x-ray machines for future use decisions.

The lnvention Radiation shielding container from Epoxy Resin mixed with Bismuth for Technetium -99m Radiopharmaceuticals

Wanwisa Thongcommak, Lapatlada doungkrat, Gunjanaporn Tochaikul — Thu, 24 Nov 2022 09:09:42 SE Asia Standard Time

Currently, the radiation is widely used in medicine for both diagnosis and treatment. At the same time, radiation can also cause radiation hazards (i.e., hair loss, DNA damage) without a proper radiation shielding. Technetium-99m (99mTc) radiopharmaceutical is one of the most common types used in nuclear medicine The unsealed source like 99mTc is continuously emitted radiation, the radiation shielding material should be applied to protect the occupational and public populations. Lead element is the gold standard and commonly used for radiation protection devices. On the other hand, lead has some disadvantages like heavy and toxic. Therefore, this research purposed was to study an appropriate ratio for inventing a radiation shielding container from Epoxy Resin mixed with Bismuth oxide ( Bi2O3) 99mTc radiopharmaceuticals the sample was prepared by using a mixture of Epoxy Resin A with hardening substance at a ratio of 2:1 and stir for approximately 15 minutes. After that, Bi2O3 was added into a epoxy-resin with 0, 20, 30, 40 and 50 grams, then stir the mixture for15 to 30 minutes. Next step, pout mixing substance into octagonal and cylindrical silicone molds and leave it until the mixture is completely dry. To test the radiation shielding performance of the radiopharmaceuticals, Technetium-99m at activity 5, 10, and 20 mCi were used to simulated the clinical situation. The measurements were performed at 0, 50 and 100 cm with 0, 90, 180 and 270 degrees. Resulted revealed that our radiation shielding container was formed completely without brittle. Therefore, the researcher expects that the devices will provide the similary radiation shielding effectiveness to commercial lead radiation shielding devics.

The Invention of Radiation shielding container from Epoxy Resin mixed with Bismuth oxide for lodine-131 Radiopharmaceuticals

Saowalak Majan, Sarunya Suntivattanatum, Gunjanaporn Tochaikul — Thu, 24 Nov 2022 09:12:09 SE Asia Standard Time

Nowadays, radiation is widely used especially for medical purpose. In nuclear medicine, radiopharmaceuticals are useful for both diagnosis and treatment. However, the radiation exposure can cause the health effect to the worker who involed with unsealed radiation source. Therefore, radiation shielding is the most important equipment for radiation protection issue to reduce an unnecessary radiation exposure. Lead has been considered as the standard material for radiation shielding in several decades but lead also have a drawback about heaviness and toxicity. Thus, the aims of this study was to innovate the lightweight and lead-free radiation shielding by using an Epoxy-resin based loading with bismuth oxide (Bi2O3) powder for Iodine-131 (131I) radiopharmaceuticals container. The optimal ratio between epoxy- resin and Bi2O3 was determined by loading different weight of Bi2O3 20, 30, 40 and 50g to the epoxy-resin. Measured the transmission radiation from 131I activity 7.5, 15, 30, 50, 100 and 200 mCi that passing through the container then compared with the commercial lead material. The result showed that the 50 g Bi2O3 added provide the best radiation shielding propertie with 43% to 48% of transmission. The comparison between 50g Bi2O3 and lead showed our material was absorbed only 52% to 57% when lead was 99% which it lower 1.7 to 1.9 times than lead. In the other hand, the heaviness of our material was lower about 20 times. According to our study, the epoxy-resin loading with Bi2O3 can reduce the radiation. The radiation shielding efficiency of our container was lower than lead material but if we increasing the container’s thickness to 4 cm., the efficiency of bismuth based container was similar to the commercial lead material. Therefore, we concluded that bismuth oxide can be an alternative elements instead of lead which also provide a low cost, lightness and non-toxicity.

Black Box competition: Radiological technology education using Black Box phantom (Poster presentation)

Keisuke Kondo, Kazuo Shimura — Thu, 24 Nov 2022 09:17:22 SE Asia Standard Time

We developed an educational phantom for students of the Department of Radiological Technology.
The phantom consists of three types of cube phantoms (XCUBEs) with different X-ray absorption rates (yellow, blue, and orange) and a black box (BBOX) that can hold 27 XCUBEs (3x3x3=27). The student's task is to analyze multiple X-ray images to estimate the color of the cube phantoms at 27 locations in the BBOX. In November 2021, a "BBOX Competition" was held by connecting two universities via the Internet. Teams of three to four people and individual competitions were held, with participants competing on the accuracy of their analysis and the time required for analysis. The questionnaire results confirmed that the BBOX competition is a useful learning experience and that it is particularly effective in developing communication and team skills in team competitions. We would like to grow the Black Box Competition into a nationwide competition. In addition, we would like to try to hold Black Box Competitions with universities overseas. We believe that exchanges through the Black Box Competition will lead to not only active learning in the field of radiological technology, but also to a wide range of cultural exchanges.

Associating Factors of Osteoporosis in Postmenopausal women at Vajira Hospital.

Thu, 17 Nov 2022 10:16:17 SE Asia Standard Time

Background and objective: Prevalence of postmenopausal osteoporosis is increasing. Osteoporosis increases the chance of fractures which increased morbidity and mortality rates. This study aims to studies 3 risk factors for osteoporosis; age, body mass index (BMI), age at menopause.
Methods: This cross-sectional study in postmenopausal women was evaluated for bone mineral density using Dual-energy X-ray absorptiometry at nuclear medicine department in Vajira hospital from January 2012 to December 2012. A total of 1,201 women were enrolled, 494 with osteoporosis and 707 without osteoporosis. Use criteria for the diagnosis of osteoporosis according to WHO criteria. Records of baseline data and risk factors; age, BMI, and menopause age, were collected from DXA.
Results: Factors of age, BMI, and menopause age have significant associations with the incidence of osteoporosis in postmenopausal women. In the Crude Odds ratio analysis, the age groups 60-69, 70-79, and 80 more at risk of developing osteoporosis than 1.627, 2.365, and 5.808 times, respectively, compared to the reference age group of 50-59 years old. BMI group underweight (<18.5) and normal (18.5-23) more at risk of developing osteoporosis were 5.895, 1.933 times, respectively, compared to the reference Overweight group (>23). When women age, the menopause increases 1 year. will result in a decrease in osteoporosis by 2.1 percent. In the Adjust Odds ratio analysis, the age groups 60-69, 70-79, and 80 more at risk of developing osteoporosis than 1.830, 2.687, and 6.028 times, respectively, compared to the reference age group of 50-59 years old. BMI group underweight (<18.5) and normal (18.5-23) more at risk of developing osteoporosis were 5.467, 2.002 times, respectively, compared to the reference Overweight group (>23). When women age, the menopause increases 1 year. will result in a decrease in osteoporosis by 2.3 percent. Conclusion: Factors of age, body mass index (BMI), and menopause age. There was a statistically significant association with the incidence of osteoporosis in postmenopausal women.

Radiation dose to neurological radiologist from cerebral angioplasty: A case report

Tanyawimol Somtom, Thanakorn Somboot, Panatsada Awikunprasert — Thu, 17 Nov 2022 10:25:32 SE Asia Standard Time

The neurological radiologist who performs cerebral angioplasty exposes to direct radiation and scattering radiation at various locations of the body. The accumulated radiation for a long time might have long-term effects, such as cataracts, leukemia and DNA changes that can develop into cancer. This research aims to measure the radiation dose to the neurological radiologist receives from performing cerebral angioplasty. OSL dosimeters were attached to the eyes, thyroid, wrists and legs of radiologist to measure the radiation dose of these organs. The results showed that fluoroscopy time was used up to 52 minutes for treatment in AMV cases. The minimum dose received was 0.01 mSv when a shield was used, and the maximum dose received was 0.29 mSv at the lens of left eye, followed by 0.24 mSv at the left leg when no shielding device was used. The measured data were then calculated to determine the number of cases per year that radiologists were able to perform the procedure. From the radiation dose limit, it was found that radiologists were able to treat up to 69 cases annually. In conclusion, the radiologist should be aware about radiation protection. The additional fluoroscopic time is resulting in increased radiation doses. Moreover, personal staff doses should be constantly checked, recorded, and monitored.

Measurement of radiation dose in intra-oral radiography in Vajira Hospital

Thu, 17 Nov 2022 10:38:54 SE Asia Standard Time

Measurement of incident air kerma (Ka,r) without a patient is used as a radiation dose in dental radiography. These radiation doses are the diagnostic reference levels (DRLs) in intra-oral radiography in Vajira Hospital. A dose meter is used to measure incident air kerma from intra-oral radiography. Radiation doses were collected from three different teeth: incisor, premolar, and molar from upper and lower jaw. The radiation dose was also measured from bitewing technique. The exposure techniques from those examinations were recorded. The results showed that the radiation dose of upper- and lower-jaw were slightly different. From the upper jaw, the radiation dose of incisor, premolar, and molar were 0.4 mGy, 0.5 mGy, and 0.7 mGy, respectively. From lower jaw, the radiation dose of incisor, premolar, and molar were 0.3 mGy, 0.4 mGy, and 0.5 mGy, respectively. The radiation dose of bitewing technique was 0.9 mGy. The intra-oral DRLs of this study were lower than Thai national DRLs by Department of Medical Science (DMSC). The different of radiation dose might be from the factors of imaging system, age of the machine, brand, model, exposure techniques, generator, etc. ALARA's optimization principles could be applied by reducing exposure techniques while maintaining the quality of image. The optimization is important in ensuring the proper use of the radiation dose to the patient. DRLs should be inspected every 2-3 years.

Evaluating deep learning model accuracy in detecting COVID-19 from chest X-ray images

Thu, 17 Nov 2022 11:27:52 SE Asia Standard Time

This research purpose is to find highest model accuracies and performances using transfer learning technique for classifying covid-19 and normal chest X-ray images. Materials: A computer with CPU Intel core i9-10900 Ram 32GB and NVIDIA GeForce GPU, Window10, 12 selected pre-trained models in TensorFlow 2.1.0 including VGG16, VGG19, DenseNet121, DenseNet169, DenseNet201, RestNet50V2, RestNet101V2, RestNet152V2, InceptionRestnetV2, InceptionV3, XceptionV1 และ MobileNetV2, Anaconda navigator program (anaconda3), Anydesk, Microsoft Excel and Chest X-Ray images from Kaggle website Methods: 1) Downloading and installing Anaconda program 2) Coding the model to predict the Covid-19 image using Python 3.6 3) Preparing the chest X-Ray images from Kaggle database 4) The images are divided into 3 sets; train, test and validation set 5) Comparing the performance of the model using the hyperparameters epoch, batch size and learning rate of 16, 16 and 0.0001, respectively 6) Recording the prediction results of each model Results The highest accuracy model for detecting COVID-19 are DenseNet169, with the accuracy of 95.4% Conclusion: The DenseNet169 provides highest performance in differentiating COVID-19 and normal chest X-ray images with current data set, which can be optimized further for improving the model accuracy.

The Comparison of Bone Mineral Density between Quantitative ultrasound and Dual-Energy X-ray Absorptiometry

Pasinee Boonsuk, Gunjanaporn Tochaikul, Marut Pukdeeyorng — Thu, 17 Nov 2022 11:29:29 SE Asia Standard Time

Dual-energy X-ray absorptiometry (DXA) is a gold standard method for bone density assessment regarded to World Health Organization WHO because of its high reliability and
precision. However, the disadvantages of DXA are unwidely available, expensive and importable. Therefore, Quantitative Ultrasound (QUS) has been introduced as an alternative technology to bone densitometry. Due to the low cost, portability and no ionizing radiation. So, the aim of this study was to determined the correction factor of QUS ALOKA AOS-SA, Hitashi, Japan by calibrated with bone mineral density (BMD) using DXA GE Lunar Prodigy The 3 volunteers were measured the BMD value at the hip and L-spine by DXA, then
they were measured by QUS at the calcaneus with in minutes after finished measurement by DXA. The percentage different between DXA and QUS were calculate for all volunteers. An average correction factor from volunteers were also determined The result showed the BMD value different between QUS and DXA were about -15.385 ı 49.763. The calculated correction factor, L-spine and hip, were 1.244 and 0.873 respectively. As expected, the different between QUS and DXA was decreased when applied the correction factors. Therefore, we considered the QUS as an alternative method for measure the BMD value which can provided a similar result to DXA gold standard.

Prevalence of osteopenia and osteoporosis in Thai patients at Vajira hospital.

Thu, 17 Nov 2022 11:30:54 SE Asia Standard Time

Background and Objective: Osteoporosis is a disease in which the density and quality of bone are reduce, increases risk of fracture. However, studies that report prevalence of osteoporosis and osteopenia in Thai population has not been updated. Also, studies in Thai male patients and in patients over 80 years of age have little research. The research team believes that more up-to-date information should be studied. The objective of this study was to determine the prevalence of osteoporosis and osteopenia in Thai population that visited Vajira Hospital. The information can be used as a guideline for the surveillance of osteoporosis in the future.
Methods: Collect basic data for each patient from the PACS system. Then, measure BMD in lumbar spine L1-4 , neck of femur and total hip from DXA, export the data and save to excel file. Then, the data were statistically analyzed and presented research data to determine the prevalence of osteoporosis and osteoporosis.
Result: Among 6517 participants divided into 5893 females and 624 males, age 50-90 year, and evaluated for bone mineral density using Dual energy X-ray absorptiometry at nuclear medicine department in Vajira hospital from 2017 to 2021.The prevalence of Osteoporosis over 5 years was 41.6%, comprising the prevalence of women 43.3% and the prevalence of males is 25%. The prevalence of osteoporosis increases with increasing age, The bivariate analysis showed that osteoporosis more common in females than males with significantly P-value<0.05 (OR=2.30; 95% CI=1.90-2.77). The prevalence of Osteopenia over 5 years was 44.1%, comprising the prevalence of 43.8% of females and 46.8% of males. Conclusion: The present study demonstrate descriptive BMD data, shows the prevalence of osteoporosis and osteoporosis in males and females. The present study show prevalence of osteoporosis increases with increasing age, found in females 2.3 times more than males.
Discussion: The prevalence of osteoporosis in all examined areas increased with increasing age. In males and females, osteoporosis was found in the femoral neck area the most. In females, osteoporosis occurs twice as much as in males. This differs in many studies due to health policy. Differences in exercise and life environment

The impact of ultrasonography preparations on the accuracy of deep learning model in classifying hepatic lesions

Thu, 17 Nov 2022 11:32:06 SE Asia Standard Time

Ultrasound plays a vital role in hepatic lesion assessment; however,
it limits in distinguishing between hepatic benign and malignant tumors. As a result, deep learning was proposed to address this limitation, in which the hepatic lesion diagnosis could be improved. However, the low accuracy of deep learning models remains and there is currently no research looking into how appropriate ultrasonography data preparation improves the model’s accuracy. As such, we aim to assess the impact of ultrasonography data preparing methods on the deep learning model’s performance in hepatic lesion classification. This study is conducting in 2020-2022. We have retrospectively collected ultrasound images of chronic hepatitis B patients, participating in the Hepatocyte Cancer Surveillance Program at Chulabhorn hospital. The data includes 500 images (100 images for each lesions) of normal liver, hepatocellular carcinoma (HCC), Hepatic hemangioma, hepatic cyst, and FFS (Focal Fatty Sparing), which were clinically confirmed by Computed tomography and/or MRI. For image processing, all images will be cropped to the same size of 224x224 to remove patient information and make the image size homogeneity. We will employ four existing methods for data preparing, including Min-Max Normalization, Scaling Standardization, Contrast Limited Adaptive Histogram Equalization, and Adaptive Weighted Median Filter. Then, the preprocessed images will be used as an input data for a pre-trained deep learning network (ResNet50) to measure the accuracy of the model in classifying hepatic lesions, running in MATLAB. In order to establish the optimal approach for data preparation, the accuracy of RestNet50 testing with four different types of data sets will be compared. We expect that the performance of deep learning model would be improved using an appropriate data preparation method in this study.

Black Box competition: Radiological technology education using Black Box phantom

Keisuke Kondo, Kazuo Shimura — Thu, 17 Nov 2022 11:33:06 SE Asia Standard Time