Journal of

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Background: The aim of this study is to explore the safety and diagnostic performance of dual-source CT scan in comparison with single source CT scan and conventional angiography in patients with coronary heart diseases.
Materials and methods: A systematic review was performed using CRD standard methods. The Cochrane Library, MEDLINE, EMBASE، Google Scholar and TRIP were searched up to April 2009. The references of the marked studies and gray literature were also searched.

Results: 17 articles were included. 9 articles reported the safety and 12 articles reported the diagnostic performance of DSCT.  Generally DSCT was a non-invasive and safe procedure.  Using DSCT the exposure of patient to X-ray was less than 64-slice single source CT (SSCT) and more than conventional angiography. For the DSCT the mean sensitivity was 90.4%, mean specificity was 82%, mean PPV was 83% and mean NPV was 96%. For the SSCT the mean sensitivity was 90.4%, mean specificity was 82%, mean PPV was 83% and mean NPV was 96%. The mean sensitivity, specificity, PPV and NPV of DSCT were slightly higher than SSCT.

Conclusion: DSCT is a noninvasive and relatively safe technology. The diagnostic performance of DSCT is higher than SSCT, but its performance is not so much high to be able to substitute the conventional invasive angiography which is still the gold standard test.

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Background: Human Resources in the health sector not only is the most crucial source in health providing but account for nearly three-quarters of the health sector's costs. The purpose of this study was to estimate the required Human Resources of the CT scan department of the Reza Radiotherapy-Oncology Center based on the workload indicator of staffing needs in 2019.
Materials and Methods: This cross-sectional descriptive study used human resources determination based on staffing needs' workload indicators. The method of conducting expert meetings was used to determine the components of workload and standard time. Also, Interviews and rules, and personnel systems were used to determine the amount and factors related to available working time, and to determine the annual workload, the hospital management system and observation of activity logs were used. Excel and SPSS19 software were used to analyze the data for determining the required human resources and timing data, respectively.
Results: 7 factors related to staff annually available work time were identified. The available work time for CT scans staff was 1113 hours per year. In this study, imaging and simulation were determined as the main activities of the CT scans ward. The results of the workload indicator calculations showed that the CT scan section lacked 3 Personnel.
Conclusion: This study showed that Reza Radiotherapy Oncology Center is experiencing a shortage of professional CT scan staff, and the work pressure is (0.4). Therefore, CT scans are a top priority to provide the human resource.