Collimation and Exposure Parameter Influence Image Quality and Potential Radiation Dose to the Eye Lens of Personnel in Computed Radiography of the Canine Pelvis

Introduction: The purpose of this study was to evaluate the effect of collimation on image quality and radiation dose to the eye lenses of the personnel involved in computed radiography of the canine pelvis.Materials and Methods: A retrospective study of canine pelvic radiographs (N = 54) was undertaken to evaluate the relationship between image quality and the degree of field the collimation used. This was followed by a prospective cadaver study (N = 18) that assessed the effects on image quality and on scattered radiation dose of different collimation field areas and exposure parameters. All radiographs were analyzed for image quality using a Visual Grading Analysis (VGA) with three observers. Finally, the potential scattered radiation dose to the eye lens of personnel restraining a dog for pelvic radiographs was measured.Results: The retrospective study showed a slightly better (statistically non-significant) VGA score for the radiographs with optimal collimation. Spatial and contrast resolution and image sharpness showed the greatest improvement in response to minimizing the collimation field. The prospective study showed slightly better VGA scores (improved image quality) with the optimal collimation. Increasing the exposure factors especially the tube current and exposure time (mAs) resulted in improved low contrast resolution and less noise in the radiographs. The potential eye lens radiation dose increased by 14, 28, and 40% [default exposures, increased the tube peak potential (kVp), increased mAs, respectively] as a result of reduced collimation (increased beam size).Conclusion: The degree of collimation has no statistically significant on image quality in canine pelvic radiology for the range of collimation used but does have an impact on potential radiation dose to personnel in the x-ray room. With regard to radiation safety, increases in kVp are associated with less potential scatter radiation exposure compared to comparable increases in mAs.

A Study on Soot and Ash Accumulation Characteristics of Diesel Particulate Filter Substrate Using Nondestructive Computed Radiography X-ray Imaging Technique

The diesel particulate filter of a diesel engine is an after-treatment device that removes particulate matter from exhaust emissions by filtering and oxidating them through a regeneration process. When the diesel particulate filter is damaged, a vehicle inspection is usually performed; if the cause is not found through using on-board diagnostics, then the diesel particulate filter is removed, and a visual test is conducted. However, it is not easy to find the exact cause of the diesel particulate filter being damaged, and a visual test takes a long time as the diesel particulate filter substrate is covered by a canister. In this study, using the computed radiography X-ray imaging technique, X-ray images were taken after placing an accumulated amount of carbon powder, similar to soot and ash powder in the substrate. Results confirmed that carbon powder and ash powder were shown in white in X-ray images, leading to a conclusion that distinguishing between carbon powder and ash powder is possible by analyzing the pixel value through the image processing technique. However, since pixel values alone are insufficient for exact quantitative evaluation, various studies and analyses are necessary for quantitative evaluation.

Material Analysis of Lead Aprons Using Radiography Non-Destructive Testing

Lead Apron is a Personal Protective Equipment (PPE) against the effect of Ionizing Radiation such as X-ray. It is essential for the radiation worker to wear Radiation Protection Equipment during commissions involving ionizing radiation. In Pekanbaru, Indonesia the most common radiation worker is Radiographer which help in hospital for diagnose. In this study the Lead Apron analyzed were 6 apron which suspected to have fault due to its inappropriate tend using NDT radiography methods. Radiography methods have advantage of graphic presentation of object unlike any NDT-methods. The image produce from radiography were analyzed using Computed Radiography (CR) and measured the defection of the material. There was only 3 of 6 Lead Apron appropriate for radiation protection.

Analisa Artefak Pada Hasil Radiograf Yang Timbul Akibat Pengolahan Computed Radiography

Artefacts are structures or appearances that are not normally present on radiographs, errors in radiographic processing may be due to technical errors or film processing errors. This research was conducted using Descriptive methods, with the type of literature study that aims to examine the causes of artifacts that can occur as a result of improper handling of film processing errors.The results of the analysis concluded that the frequent occurrence of artifacts in the processing of Computed Radiography is caused by two factors, that is the use of imaging plates and grids lisolm. His advice should be in the processing using Computed Radigraphy the officer must be more careful and pay attention to the components in Computed Radiography.

Normal Diaphragm Measurements in the Saudi Population Using Posteroanterior Chest Radiograph

The aim of this study was to establish normal measurements of the hemidiaphragm widths and heights in the Saudi population by a posteroanterior (PA) chest X-ray in the Mecca Region. Methods and Results: The data were collected prospectively at King Abdulaziz Hospital in Saudi Arabia, Jeddah, between March and April 2021, using a computed radiography imaging unit. A total of 45 patients (51.1% men and 48.9% women; the age range between 15 and 79 years) were included in the study. Measurements were obtained on an ideal PA chest radiograph by measuring the distance from the highest points of the right hemidiaphragm and left hemidiaphragm. The width from the right and left costophrenic angle was also measured as an ended point. The total diaphragm width (DW) was 278.32±24.83mm, the total right diaphragmatic dome height (RDDH) -51.30±10.58mm, and left diaphragmatic dome height (LDDH) - 38.40±9.21mm. The DW was greater in men than in women: 291.74±20.4mm and 264.28±21.2mm, respectively. RDDH and LDDH were also greater in men than in women: 55.4±6.77mm and 47.005±12.19mm, and 43.29±6.65mm and 33.28±8.83, respectively Conclusion: Computed radiography was useful in measuring the diaphragm because measurement points can be identified accurately and easily due to the availability of the processing system functions such as the ability to manipulate the image resolution, image contrast, and magnification.

A comparison of erect weight-bearing and non-weight-bearing radiography of the cervical spine in non-trauma patients

Introduction: Various positioning techniques are utilized to enhance the visualization of lower cervical vertebrae on lateral radiographs. However, the effectiveness of these techniques still remains unclear. This study was conducted to determine the effect of the weight-bearing (WB) technique in visualizing lower cervical vertebrae and cervicothoracic junction (C7-T1) on standing lateral cervical radiographs of adult non-trauma patients. The study was conducted using both computed radiography (CR) and digital radiography (DR) systems.Methods: Forty-four CR (29 WB and 15 non-WB – NWB) and 61 DR (26 WB and 35 NWB) lateral C-spine radiographs were prospectively evaluated to assess the visible number of cervical vertebral bodies and C7-T1 junction. The instructions given by the radiographer to the patient for the imaging procedure were also assessed on the Likert scale (very good, good, fair, poor, very poor).Results: There was no significant difference (p > 0.05) in the visualization of the number of vertebral bodies between the two techniques of WB and NWB for CR or DR. Further, no significant relationship (p > 0.05) was observed between the WB technique and the visualization of C7-T1 junction in DR systems. However, a significant difference was identified for CR (p = 0.012). The instruction given to the patient significantly correlated with the visibility of the lower C-spine region within each group of WB and NWB in both imaging systems.Conclusions: The visibility of the number of vertebral bodies in the lower C-spine region in either CR or DR systems did not demonstrate any enhancement with the WB technique. Regardless of the imaging system or techniques used, adequate instructions given to the patient before and during the imaging procedure of C-spine lateral radiography demonstrated a significant improvement in visualizing the lower C-spine region. In this preliminary study, the application of erect WB radiography technique in evaluating the lower cervical region of adult non-trauma patients gives limited advantage.

INFLUENCE OF GEOMAGNETIC DISTURBANCE ON THE PSYCHOLOGICALSTATE OFTHEINHABITANTS OFTHE N

The aim of the work was to determine the influence of geomagnetic disturbance on the psychoemotional status of residents of polar and Subpolar latitudes. Materials and methods. 44 male and female volunteers with an average age of 49.2 (41.7; 55.4) years, living in auroral and sub – auroral latitudes were examined using tests of Ch. Spielberger-Yu. Hanin, E. Khaimah and psychosomatic techniques. The daily CR index (Computed Radiography) was used as an integral indicator of geomagnetic disturbance. Results. The volunteers were divided into two groups: psychologically sensitive to changes in space weather (I) and-not having such sensitivity (II) (based on the presence or absence of certain coincidences of the peak values of reactive anxiety and the CR index). The groups had an equal number of persons. It was found that the most problematic area of stress-overcoming behavior in both groups was behavioral, the most effective for group I — cognitive, for group II — emotional sphere. Individuals with psychological sensitivity to geomagnetic disturbances were significantly more anxious than those who did not have this sensitivity. Conclusion. Thus, despite the fact that all the inhabitants of the Northern latitudes observed by us were not sufficiently effective in constructing the actual stressovercoming behavior, the risk of developing psychosomatic diseases was higher in the owners of psychological sensitivity to geomagnetic disturbance, taking into account their tendency to suppress emotions and significantly higher anxiety.

Semi-quantitative scoring of imaging modalities in detecting soft tissue foreign bodies: an in vitro study

Background Accurate identification of foreign bodies (FB) using medical imaging is essential for diagnosis and determining the suitable retrieval technique. Purpose To compare the sensitivity of different imaging modalities for detecting various FB materials in soft tissue and assess the reproducibility of a scoring system for grading the conspicuity of FBs. Material and Methods Five FB materials (plastic, wood, glass, aluminum, and copper) were embedded in a tissue-mimicking phantom. Computed radiography (CR), ultrasound, computed tomography (CT), and magnetic resonance imaging (MRI) were compared using a semi-quantitative 5-point Likert scale scoring system. The intra- and inter-reader reproducibility of four independent readers was analyzed using Kendall’s coefficient of concordance (W). Results Glass was visible on all imaging modalities. Plastic was only visible in excellent detail using ultrasound. Wood was detected in excellent resolution using ultrasound and CT using the default window while plain X-ray failed to detect it. Ultrasound was the only modality that showed aluminum in excellent quality while CT showed it with good demarcation from the surroundings. Copper was detectable in excellent detail using CR, ultrasound, and CT. MRI performance was suboptimal, especially with the plastic FB. The scoring system showed excellent intra-reader (W = 0.91, P = 0.001) and inter-reader (W = 0.88, P < 0.001) reproducibility. Conclusion Ultrasound can be used as the first line of investigation for wood, plastic, glass, and metallic FBs impacted at superficial depths in soft tissue. The semi-quantitative FB scoring system showed excellent within- and between-reader reliability, which can be used to score and compare the detection performance of new imaging techniques.