scholarly journals Estimation of dose and cancer risk to newborn from chest X-ray in South-South Nigeria: a call for protocol optimization

2021 ◽  
Vol 52 (1) ◽  
Author(s):  
Akintayo Daniel Omojola ◽  
Michael Onoriode Akpochafor ◽  
Samuel Olaolu Adeneye ◽  
Isiaka Olusola Akala ◽  
Azuka Anthonio Agboje
Keyword(s):  
Cancer Risk ◽  
Age Groups ◽  
Field Size ◽  
Radiological Protection ◽  
International Studies ◽  
X Ray ◽  
Thermoluminescent Dosimeters ◽  
Chest X Ray ◽  
Neonatal Patient ◽  
The Mean

Abstract Background The use of X-ray as a diagnostic tool for complication and anomaly in the neonatal patient has been helpful, but the effect of radiation on newborn stands to increase their cancer risk. This study aims to determine the mean, 50th percentile (quartile 2 (Q2)), and 75th percentile (quartile 3 (Q3)) entrance surface dose (ESD) from anteroposterior (AP) chest X-ray and to compare our findings with other relevant studies. The study used calibrated thermoluminescent dosimeters (TLDs), which was positioned on the central axis of the patient. The encapsulated TLD chips were held to the patients’ body using paper tape. The mean kilovoltage peak (kVp) and milliampere seconds (mAs) used was 56.63(52–60) and 5.7 (5–6.3). The mean background TLD counts were subtracted from the exposed TLD counts and a calibration factor was applied to determine ESD. Results The mean ESDs of the newborn between 1 and 7, 8 and 14, 15 and 21, and 22 and 28 days were 1.09 ± 0.43, 1.15 ± 0.50, 1.19 ± 0.45, and 1.32 ± 0.47 mGy respectively. A one-way ANOVA test shows that there were no differences in the mean doses for the 4 age groups (P = 0.597). The 50th percentile for the 4 age groups was 1.07, 1.26, 1.09, and 1.29 mGy respectively, and 75th percentile were 1.41, 1.55, 1.55, and 1.69 mGy respectively. The mean effective dose (ED) in this study was 0.74 mSv, and the estimated cancer risk was 20.7 × 10−6. Conclusion ESD was primarily affected by the film-focus distance (FFD) and the patient field size. The ESD at 75th percentile and ED in this study was higher compared to other national and international studies. The estimated cancer risk to a newborn was below the International Commission on Radiological Protection (ICRP) limit for fatal childhood cancer (2.8 × 10−2Sv−1).

scholarly journals Assessment of radiation dose to pediatric patients during routine digital chest X-ray procedure in a government medical centre in Asaba, Nigeria

2021 ◽  
Vol 8 (3) ◽  
pp. 155-160
Author(s):  
Asogwa Chijioke Obiora ◽  
Hyacienth Uche Chiegwu ◽  
Akintayo Daniel Omojola ◽  
Ebube Mmeli Onwughalu
Keyword(s):  
Radiation Dose ◽  
Effective Dose ◽  
Pediatric Patients ◽  
Age Groups ◽  
Absorbed Dose ◽  
Field Size ◽  
X Ray ◽  
Chest X Ray ◽  
The Mean ◽  
Risk Of Cancer

Objective: Radiation dose to pediatric patients have been widely reported, it is however necessary that imaging expert keep doses as low as possible to forestall stall long term cancer risk. This study is aimed at determining pediatric entrance surface dose (ESD), 75th percentile ESD, absorbed dose (D) and effective dose (E) for 0-15 years. Material and Methods: The study used a digital radiography (DR) unit with a grid system for each chest X-ray. The thermoluminescent dosimeter (TLD) used was encapsulated in transparent nylon, it was then attached to the patient skin (chest wall) and the second was placed directly at the posterior end of it. Results: The mean ESDs for the 4 age groups were as follows: 0- < 1 (1.54±0.74mGy), 1- < 5 (1.53±0.83mGy), 5- < 10 (0.55±0.39mGy) and 10- ≤15 (1.30±0.57mGy), with an overall mean of 1.23mGy. The 75th percentile ESD for each age group above 10 patients (excluding 5- < 10yrs) was 2.18, 2.19 and 1.75mGy respectively. The absorbed dose (D) ranged from 0.03-2.39mGy. The mean effective dose (E) for the 4 age groups was 0.18±0.03mSv. There was a good correlation between ESD and D (P = 0.001). A One-Way ANOVA shows that the field size and focus to film distance (FFD) affected the ESD and D (P < 0.001) respectively. The risk of childhood cancer from a single radiograph was of the order of (1.54-23.4) ×10-6. Conclusion: The 75th percentile ESD, E and childhood risk of cancer was higher than most studies it was compared with. The study reveals that machine parameters such as the field size and FFD played a major role in dose increase. Protocol optimization is currently needed for pediatric patients in the studied facility.

scholarly journals 806. 2013–2015 Nationwide Tuberculosis Contact Investigation in Childcare Centers and Schools in Korea

2018 ◽  
Vol 5 (suppl_1) ◽  
pp. S289-S289
Author(s):  
Woosuck Suh ◽  
Jong-Hyun Kim ◽  
Ji Hyen Hwang ◽  
Sodam Lee ◽  
Kang-Hee Lee ◽  
...  
Keyword(s):  
School Setting ◽  
Age Groups ◽  
Disease Status ◽  
Childcare Centers ◽  
X Ray ◽  
Contact Investigation ◽  
Chest X Ray ◽  
Latent Tb ◽  
The Republic ◽  
Latent Tb Infection

Abstract Background The Republic of Korea has the highest incidence rate of tuberculosis (TB) among members of the OECD, reported as 78.8/100,000 population in 2016. In response, a state-run intensive contact investigation for TB is being conducted. More effective TB control requires an epidemiologic emphasis on the diagnosis and treatment of latent TB infections in children and adolescents, compared with other age groups. Here we present an analysis of data from the childcare center and school contact investigation by the Korea Centers for Disease Control and Prevention (CDC) in 2013–2015. Methods Data collected from index patients included age, sex, occupation, disease status, results of AFB smear/culture, and chest x-ray. Data collected from contacts included age, sex, results of serial tuberculin skin test (TST), and chest x-ray. Congregate settings included childcare centers, kindergartens, elementary and secondary schools, and age groups were stratified as follows: 0–4 years, 5–12 years, and 13–18 years. TSTs were considered positive if induration ≥10 mm on the first test (TST1) or demonstrated an increase ≥6 mm over the induration of TST1 on repeat testing after 8 weeks (TST2). Results Of the 197,801 subjects with data collected, 173,998 were eligible and included in our analysis. TST1 results were available for 159,346 (91.6%) and when results were positive, induration was 10–14 mm in 7.6% and ≥15 mm in 1.5%. TST2 results were available for 119,797 (82.7%) of the 144,904 with negative TST1, and conversion rate was 9.0%. Altogether considering TST1 and TST2, 17.3% contacts had latent TB infections. Positive rates of TST significantly decreased with age: 20.3% in 0–4 years, 18.8% in 5–12 years, 17.1% in 13–18 years. Conclusion In this 3-year school-setting contact investigation, 17.3% contacts were diagnosed with latent TB infection, as demonstrated by TST reactions. Positive rates of TST significantly but mildly decreased with age. Disclosures All authors: No reported disclosures.

Impact of considering non-occupational radiation exposure on the association between occupational dose and solid cancer among French nuclear workers

2017 ◽  
Vol 75 (3) ◽  
pp. 199-204 ◽  
Author(s):  
Lucie Fournier ◽  
Enora Cléro ◽  
Eric Samson ◽  
Sylvaine Caër-Lorho ◽  
Dominique Laurier ◽  
...  
Keyword(s):  
Occupational Exposure ◽  
Cancer Risk ◽  
Radiation Exposure ◽  
Cancer Mortality ◽  
Environmental Radiation ◽  
Occupational Radiation Exposure ◽  
X Ray ◽  
Work Related ◽  
The Mean ◽  
Occupational Radiation

ObjectivesThe French nuclear worker cohort allows for the assessment of cancer risk associated with occupational radiation exposure, but workers are also exposed to medical and environmental radiation which can be of the same order of magnitude. This study aims to examine the impact of non-occupational radiation exposures on the dose-risk analysis between occupational radiation exposure and cancer mortality.MethodsThe cohort included workers employed before 1995 for at least one year by CEA, AREVA NC or EDF and badge-monitored for external radiation exposure. Monitoring results were used to calculate occupational individual doses. Scenarios of work-related X-ray and environmental exposures were simulated. Poisson regression was used to quantify associations between occupational exposure and cancer mortality adjusting for non-occupational radiation exposure.ResultsThe mean cumulative dose of external occupational radiation was 18.4 mSv among 59 004 workers. Depending on the hypotheses made, the mean cumulative work-related X-ray dose varied between 3.1 and 9.2 mSv and the mean cumulative environmental dose was around 130 mSv. The unadjusted excess relative rate of cancer per Sievert (ERR/Sv) was 0.34 (90% CI −0.44 to 1.24). Adjusting for environmental radiation exposure did not substantially modify this risk coefficient, but it was attenuated by medical exposure (ERR/Sv point estimate between 0.15 and 0.23).ConclusionsOccupational radiation risk estimates were lower when adjusted for work-related X-ray exposures. Environmental exposures had a very slight impact on the occupational exposure risk estimates. In any scenario of non-occupational exposure considered, a positive but insignificant excess cancer risk associated with occupational exposure was observed.

Comparison of granulomatosis with polyangiitis clinical features in patients depending of involvement or absence of kidney involvement

2021 ◽  
Vol 17 ◽  
Author(s):  
Mateusz Puchala ◽  
Andrzej Rydzewski ◽  
Ilona Kowalik ◽  
Małgorzata Wisłowska
Keyword(s):  
Clinical Features ◽  
Crescentic Glomerulonephritis ◽  
Immunosuppressive Treatment ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
X Ray ◽  
Small Vessels ◽  
Kidney Involvement ◽  
Chest X Ray ◽  
The Mean

Background: GPA is a necrotizing inflammation of the small vessels with granulomas. Kidney involvement deteriorated its prognosis. Objective: Comparison of GPA patients with kidney (KI) and without kidney involvement (nKI). Material and methods: We conducted a cross-sectional study of 50 consecutive adult GPA patients, 25 KI from Nephrology and 25 nKI from Rheumatology Department of Central Clinical Hospital Ministry of Interior in Warsaw. We analyzed clinical features, organ involvement, laboratory, serological, imaging, histopathological data, BVAS, treatment. Results: The mean age of KI patients was statistically older then nKI (67.3±9.5 vs 55.1±15.9, p=0.002). Generalized, severe, resistance disease was observed respectively in 92% vs 44%, p<0.001. The number of red blood cells (3.47 vs 4.41T/l, p<0.001), hemoglobin (10.0 vs 12.9g/dl, p<0.001) was lower in KI, higher mean serum creatinine (3.95 vs. 0.89mg/dl, p<0.001), lower GFR (20.1 vs. 79.3, p<0.001), higher CRP (median: 43.4 vs 2.0mg/l, p<0.001), BVAS (16.6±4.4 vs 10.1±6.2, p<0.001), c-ANCA (median: 119.0 vs 15.2CU, p=0.017). Nodules in 28% KI, in 4% nKI (p=0.048) in chest X-ray, infiltration in 43.5% KI, in 15% nKI (p=0.042) in HRCT were observed. Skin granulomas were found in 61.5% nKI vs 18.2% KI, (p=0.047). Renal biopsy revealed in KI patients focal segmental glomerulonephritis in 11.8%, crescentic glomerulonephritis in 17.6%, pauci-immune crescentic glomerulonephritis in 70.6%. Conclusions: In patients with KI more frequently we found generalized, severe, resistant GPA, higher BVAS in comparison in patients without KI. The results of laboratory parameters, were worse in patients with KI. Aggressive immunosuppressive treatment is often used in KI group.

X-ray fluorescence spectrometric determination of heavy metals in selected rice samples sold on the Liberian market: a case study conducted in Paynesville City, Greater Monrovia

2020 ◽  
Vol 9 (3) ◽  
pp. 1
Author(s):  
McClain James ◽  
PAYE Plenseh Diana ◽  
N’debewillie Kokolo ◽  
CHEA Sampson K. P. ◽  
Kiazolu J. Boima
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Cancer Risk ◽  
Hazard Index ◽  
Rice Sample ◽  
X Ray ◽  
Total Cancer Risk ◽  
Total Cancer ◽  
Rice Consumption ◽  
The Mean

Background: Environmental pollution with toxic heavy metals can be lead to the possible contamination of rice. Rice is a staple food widely consumed in the urban and rural parts of Liberia daily. Rice is cultivated in approximately 113 countries and a fundamental source for energy and protein. Objective: The study assesses selected heavy metals (As, Pb, Cd, Se, and Cr) concentration in selected imported rice and traditionally grown rice and bulgur wheat in Liberia. Methods: Six grade of imported rice, Bulgar wheat, and traditionally grown rice were purchased from the Duport Road and Red-Light markets in Greater Monrovia and analyze using X-ray Fluorescence Spectrometer. All data were analyzed using XLSTAT, and data was used to calculate the risk factor of each rice sample. Results: The mean concentration of heavy metal found in the rice as follow: As, 1.31ppm; Cd, 9.42ppm; Cr. 12.3ppm; Se, 5.73ppm; and Pb, 1.75ppm. The estimated daily intakes (EDIs) were calculated in combination with the rice consumption data. The mean intakes of As, Cd, Cr, Se, and Pb through rice were estimated to be 1.32, 9.42. 12.4. 5.74, and 1.75 mg/kg BW/day. Chromium has the average estimated daily intake. The combined hazard index for the heavy metals in each sample and the total cancer risk for each sample contributed most significantly to a cancer risk of rice consumption during adult life expectancy.Conclusion: The selected heavy metal concentration from the rice sample was above the FAO/WHO reference Standard but was within the range of the contaminant level except for chromium, which is above the accepted range. However, the hazard index and the total cancer risk indicate a potential non-carcinogenic and carcinogenic risk.  

scholarly journals TREATMENT OF COMMUNITY-ACQUIRED PNEUMONIA IN CHILDREN: OPTIMIZATION OF ANTIBIOTIC THERAPY

2021 ◽  
Author(s):  
Veronika Dudnyk ◽  
Nataliya Sinchuk ◽  
Kateryna Khromykh
Keyword(s):  
Antibiotic Therapy ◽  
Age Groups ◽  
Community Acquired Pneumonia ◽  
Age Group ◽  
Case Histories ◽  
First Line ◽  
X Ray ◽  
Comparison Groups ◽  
Chest X Ray ◽  
Common Infections

Community-acquired pneumonia is one of the most common infections in children with an annual incidence of 34 to 40 cases per 1000 children in Europe and North America. Pneumonia is a common cause of death in children under five years of age worldwide. Thus, about 1,8 million children die from pneumonia annually. According to the statistics of the Ministry of Health of Ukraine, about 80,000 children every year suffer from community-acquired pneumonia in Ukraine. Material and methods: Retrospective analysis of 100 case histories of children aged 3-9 years old with outpatient segmental/polisegmental pneumonia who were in inpatient treatment in the pulmonology department of regional hospital from January 2017 to December 2018. The representativeness of the comparison groups is represented by age and sex. Methods of examination: clinical-anamnestic, laboratory and instrumental (pulse oximetry, chest X-ray). Results: Most of the children (58%) were admitted to the hospital on the first day of the illness. In 33% of children, comorbidity was noted. All children had fever, an unproductive cough, while symptoms of intoxication (76 ± 4.27%) and dyspnea (52 ± 4.49%) were more pronounced in children 3-6 years old. In the general analysis of blood in children of the first age group, in most cases, leukocytosis was more than 12 G / L (56 ± 4.96%), neutrophilic shift of the leukocyte formula to the left of 88 ± 3.25% and elevated ESR (84 ± 3.66%). X-ray in children of the first age group was dominated by polysegmental pneumonia at 54 ± 4.44%, while in children of the second age group segmental pneumonia was more common (64 ± 4.66%). Half of the children of both age groups prescribed antibiotics of the first line - a group of penicillins and cephalosporins. When starting antibiotic therapy with penicillins, the symptoms of pneumonia decreased already in the 2nd day in 16% ± 3.67% in the group of children 3-6 years old and in 18% ± 3.84% of children 7-9 years. Conclusion. Pneumonia is one of the most common diseases in children, and one of those that can cause many complications and even death. Accordingly, the treatment of this disease should be maximally effective and short-lived. The best choice for treating pneumonia is a group of oral aminopenicillins, which were administered in the first days of the disease and showed significantly better results than patients treated with cephalosporins.

Use of weight-based vs age-based groupings in the study of typical values of air kerma area product (PKA) for paediatric radiographs of chest and abdomen

2021 ◽  
pp. 20210331
Author(s):  
Ioannis Delakis ◽  
Charlotte Kelly
Keyword(s):  
Age Groups ◽  
Equivalent Weight ◽  
Late Adolescent ◽  
Weight Group ◽  
X Ray ◽  
Air Kerma ◽  
Chest X Ray ◽  
The Difference ◽  
Area Product ◽  
Weight Groups

Objective: To compare age groupings versus weight groupings in the calculation of typical air kerma area product (PKA) values in paediatric X-ray exams of chest and abdomen in our hospital. Methods: Data were analysed from 687 abdominal and 1374 chest X-ray examinations. The PKA of exams was extracted with Radimetrics, and patient weights were collected from electronic records. Data were organised in different age groups and typical PKA values were estimated. The process was repeated by organising data in different weight groups. Results: Typical PKA values for the four younger age groups (<1m, 1m - < 4y, 4y - < 10y and 10y - < 14y) were comparable to typical values for their equivalent weight groups (<5 kg, 5–15 kg, 15–30 kg and 30–50 kg, respectively). However, typical PKA values at the late adolescent age group (14y - < 18y) were much lower than its equivalent weight group (>50 kg). Conclusions: Age and weight groupings were found at our site to be interchangeable for the calculation of typical paediatric PKA values. The only exception was the late adolescent group, whose weight distribution can account for the difference in typical PKA results within its equivalent weight group. Advances in knowledge: In calculating typical PKA values for radiological paediatric body examinations, departments must ascertain if using age groups, which is typical practice, is equivalent to using weight groups. Otherwise, results may misrepresent local practice.

scholarly journals Age-specific risk factors of severe pneumonia among pediatric patients hospitalized with community-acquired pneumonia

2021 ◽  
Vol 47 (1) ◽  
Author(s):  
Lumin Chen ◽  
Chong Miao ◽  
Yanling Chen ◽  
Xian Han ◽  
Ziying Lin ◽  
...  
Keyword(s):  
Risk Factors ◽  
Risk Factor ◽  
Age Groups ◽  
Community Acquired Pneumonia ◽  
Laboratory Findings ◽  
X Ray ◽  
Icu Admission ◽  
Rsv Infection ◽  
History Of ◽  
Chest X Ray

Abstract Background Risk factors that predispose the development of severe community-acquired pneumonia (CAP) among pediatric CAP patients of different age ranges are yet to be identified. Methods We retrospectively analyzed pediatric in-patients (< 6 years old) diagnosed with CAP in our hospital. We subdivided patients into four age groups (< 6 months, 6 months-1 year, 1–2 years, and 2–6 years). Their medical records, including demographic information, clinical features, laboratory findings, and chest radiographic reports, were reviewed and collected for further analysis. Univariate logistic regression analysis and stepwise regression analysis were applied to identify risk factors associated with severe CAP and ICU admission for overall patients and age-stratified subgroups. Results A total of 20,174 cases were initially included. Among them, 3309 (16.40%) cases were identified as severe CAP, and 2824 (14.00%) cases required ICU admission. Potential risk factors for severe CAP and ICU admission identified by univariate analysis included younger age, rural residency, premature birth, low birth weight (LBW), formula feeding, congenital heart disease (CHD), history of pneumonia or neonatal jaundice, patients with other health issues, certain symptoms (manifesting wheezing, dyspnea, cyanosis, but have no cough or fever), abnormal laboratory findings (abnormal levels of white blood cells, albumin, and C-reactive protein and RSV infection), and chest X-ray (odds ratio [OR] > 1 for all). CHD, low albumin, proteinuria, abnormal chest x-ray were independent risks factors across different age groups, whereas birth or feeding history, history of pneumonia, cyanosis or dyspnea on admission, and RSV infection were independent risk factors for only younger kids (< 1 year), and wheezing was an independent risk factor only for older children (2–5 years old). Conclusions Risk factors predicting disease severity among children hospitalized with CAP vary with age. Risk factor stratification of pediatric CAP based on age-specific risk factors can better guide clinical practice. Trial registration This study has been registered in China, with the registration number being ChiCTR2000033019.

scholarly journals Clinical Characteristics of SARS-CoV-2 pneumonia diagnosed in a primary care practice in Madrid (Spain)

2020 ◽  
Author(s):  
Marina Guisado-Clavero ◽  
Ana Herrero Gil ◽  
Marta Pérez Álvarez ◽  
Marta Castelo Jurado ◽  
Ana Herrera Marinas ◽  
...  
Keyword(s):  
Primary Care ◽  
Clinical Characteristics ◽  
Primary Care Practice ◽  
Age Groups ◽  
Clinical Manifestations ◽  
Care Practice ◽  
Published Data ◽  
X Ray ◽  
Hospitalised Patients ◽  
Chest X Ray

Abstract Background: Possible cases of SARS-CoV-2 infection were diagnosed in primary care in Madrid, some of these cases had pneumonia. Most of the SARS-CoV-2 pneumonia published data came from hospitalised patients. This study set out to describe clinical characteristics of patients with SARS-CoV-2 pneumonia diagnosed in primary care across age groups and type of pneumonia.Methods: Observational retrospective study obtaining clinical data from the electronic health records of patients who were followed-up by SARS-CoV-2 possible infection in a primary care practice in Madrid. All the cases were collected by in-person or remote consultation during the 10th March to the 7th of April. Exposure: Diagnosis of SARS-CoV-2 pneumonia by chest X-ray ordered by the GP. Main outcomes and measures: Symptoms of SARS-CoV-2 pneumonia, physical examination and diagnostic tests as a blood test, nasopharyngeal swab results for RT-PCR (Reverse transcriptase-polymerase chain reaction) and chest X-ray results. Results: The overall SARS-CoV-2 pneumonias collected were 172 (female 87 [50.6%], mean age 60.5 years (standard deviation [SD] 17.0). Comorbidities were body mass index ≥25 kg/m 2 (90 [52.3%]), hypertension 83 [48.3%]), dyslipidaemia (68 [39.5%]) and diabetes (33 [19.2%]). The sample was stratified by age groups (<50 years, 50-75 years and ≥75 years). Clinical manifestations at onset were fever (144 [83.7%]), cough (140 [81.4%]), dyspnoea (103 [59.9%]) and gastrointestinal disturbances (72 [41.9%]). Day 7.8 (SD:4.1) from clinical onset was the mean day of pneumonia diagnosis. Bilateral pneumonia was more prevalent than unilateral (126 [73.3%]) and 46 [26.7%]). Patients with unilateral pneumonia were prone to higher pulse oximetry (96% vs 94%, p <0.001). We found differences between unilateral and bilateral cases in C-reactive protein (29.6 vs 81.5mg/L, p <0.001), and lymphocytes (1400.0 vs 1000.0E3/ml, p<0.001). Complications were registered: 42 (100%) of patients ≥75 years were admitted into hospital; pulmonary embolism was only present at bilateral pneumonia (7 patients [5.6%]) and death occurred in 1 patient with unilateral pneumonia (2.2%) vs 10 patients (7.9%) with bilateral pneumonia ( p 0.170).Conclusion: Clinical manifestations of SARS-CoV-2 pneumonia were fever, cough and dyspnoea; this was especially clear in the elderly. We described different characteristics between unilateral and bilateral pneumonia.

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