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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Iranian Journal of Medical Physics
- نوع مقاله: Journal Article
- کلمات کلیدی: lumbar spine,Radiation dosage,Image Quality,Digital Radiography
- چکیده:
- چکیده انگلیسی: Introduction: Digital radiography possesses a wide dynamic range and has a major advantage in producing an acceptable image of diagnostic value even though overexposure occurs. Lumbar spine (LS) radiography is the most common examinations that gives high radiation dose to patients and accounts for the highest collective population dose of any conventional radiographic examinations. As such, this study was carried out to ascertain the impact of image quality and entrance surface dose (ESD) with different exposure settings in the anteroposterior (AP) and lateral LS.
Material and Methods: The torso of the PBU-50 phantom was exposed to medium and high kilovoltage peak (kVp). A total of 14 images for LS were obtained. Relative image quality was assessed using Leeds Test Objects TOR CDR whilst the ESD was ascertained using an optically stimulated luminescence dosimeter.
Results: The results of Friedman test indicated a significant difference in image quality when using medium and high kVp. Wilcoxon signed-rank test also reflected a significant difference in ESD between the use of medium and high kVp for both AP and lateral LS.
Conclusion: Significant differences in image quality and ESD were obtained using medium and high kVp with medium kVp resulting in high contrast but low contrast sensitivity and vice versa. The findings of the present study indicated that the recommended kVp for AP LS was from 75kVp to 81kVp whilst for lateral LS the recommended kVp was from 85kVp to 90kVp for an average adult patient.- انتشار مقاله: 13-06-1397
- نویسندگان: Hanis Aisyah Ramli,Soo-Foon Moey
- مشاهده
- جایگاه : پژوهشی
- مجله: Asian Pacific Journal of Cancer Prevention
- نوع مقاله: Journal Article
- کلمات کلیدی: Breast cancer,mammography,Health behavior
- چکیده:
- چکیده انگلیسی: Background: Breast cancer (BC) awareness is relatively poor among Malaysian women indicated by the presence
of BC at a late stage and the low rate of mammography screening. Only a few theoretically based studies have been
conducted on Malaysian women’s participation in mammography. Therefore, the objective of this study is to use health
belief model (HBM) and stage of change model (SCM) to determine the relationship between health beliefs on the
behavioral adoption of mammography amongst women in Kuantan, Pahang. Methods: Five hundred and twenty women
were randomly selected to complete the survey. Data were analyzed using multinomial logistic regression (MLR) to
ascertain the multivariate relationships between health beliefs and stage of mammography behavioral adoption. Results:
The MLR test indicates that there is no significant difference in perceived severity, benefits, motivator factors and cues
to action between participants in the action stage and the maintenance stage. However, significant differences existed
in perceived severity, susceptibility, motivator factors and self-efficacy between the pre-contemplation, relapse and
contemplation stage to that of the referenced (maintenance) stage of mammography adoption. Conclusion: Women in
the action stage are more likely to progress towards maintenance stage as they perceived breast cancer as a disease that
leads to death and that mammogram screening is beneficial in detecting the disease at an early stage. However, women
in the pre-contemplation, relapse and contemplation stage are found unlikely to move towards the maintenance stage
as they perceived their risk of getting breast cancer is low.- انتشار مقاله: 21-12-1397
- نویسندگان: Hanis Aisyah Ramli,Soo-Foon Moey,Aaina Mardhiah Abdul Mutalib
- مشاهده