ESTIMATION AND ASSESSMENT OF THE EFFECTIVE DOSES FOR RADIOSENSITIVE ORGANS IN WOMEN UNDERGOING CHEST CT SCANS WITH OR WITHOUT AUTOMATIC EXPOSURE CONTROL SYSTEM

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KHORRAMIAN DARYOUSH; SISTANI SOROUSH; BANAEI AMIN; BIJARI SALAR

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Journal: TEHRAN UNIVERSITY MEDICAL JOURNAL (TUMJ) Year:2017 | Volume:75 | Issue:7 Page(s): 496-503

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Title

ESTIMATION AND ASSESSMENT OF THE EFFECTIVE DOSES FOR RADIOSENSITIVE ORGANS IN WOMEN UNDERGOING CHEST CT SCANS WITH OR WITHOUT AUTOMATIC EXPOSURE CONTROL SYSTEM

Author(s)

KHORRAMIAN DARYOUSH | SISTANI SOROUSH | BANAEI AMIN | BIJARI SALAR | Issue Writer Certificate

Keywords

CROSS-SECTIONAL STUDIESQ1

RADIATION PROTECTIONQ1

RADIATION DOSAGEQ1

X-RAY COMPUTED TOMOGRAPHYQ2

Abstract

Background: There are several techniques for reducing the delivered dose from CT (Computed tomography) scanning such as the automatic exposure control (AEC). This technique modulates the tube current regarding the patient size and weight. The aim of this study was to estimate the effect of the AEC on the radiosensitive organs effective doses in women undergoing chest CT scanning.Methods: This study was a cross-sectional, analytical and quantitative study that was performed during 3 months in the imaging section of the Firoozgar educational and therapeutic hospital (belonging to Shahid Beheshti University of Medical Sciences) in the spring of 2017. CT scan exposure parameters were gathered and registered for 54 women undergoing chest CT scan. Twenty-five of these scans were performed using AEC system and 29 of them were performed without using AEC. CT dose indexes in the center and peripheral regions of the standard phantom were calculated using the exposure parameters. Weighted CT dose index was also calculated and effective organ doses were obtained using CT-Expo software, version 2 (Medizinische Hochschule, Hannover, Germany) for two mentioned groups. In addition, noise was measured for these two groups as an image quality parameter.Results: Calculated weighted CT dose indexes were 9.94 mGy and 12.46 mGy using AEC system and without using AEC, respectively. The calculated effective doses were equal to 5.4 mSv and 6.3 mSv using AEC and without using AEC, respectively. Maximum organ effective doses were 15, 14, 14 and 14 mSv for breast, esophagus, lung and thymus respectively in the non-using AEC system imaging technique.Conclusion: Our measurements indicated a decrease about 15% in weighted CT dose index (from 12.46 to 9.94 mGy) using AEC system. Beside of this fact, the noise increased about 11.3% (from 4.2 to 4.74) using AEC system. So, it can be said that using of AEC was an effective way for dose reduction in women undergoing chest CT scanning, and the additional noise was in the acceptable range.

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References

EVALUATION OF ABSORBED DOSE OF CRITICAL ORGAN IN RANDO PHANTOM UNDER HEAD, ABDOMEN AND PELVIS SPIRAL CT SCAN BY THERMO LUMINESCENT DOSIMETERY-TLD

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APA: Copy

KHORRAMIAN, DARYOUSH, SISTANI, SOROUSH, BANAEI, AMIN, & BIJARI, SALAR. (2017). ESTIMATION AND ASSESSMENT OF THE EFFECTIVE DOSES FOR RADIOSENSITIVE ORGANS IN WOMEN UNDERGOING CHEST CT SCANS WITH OR WITHOUT AUTOMATIC EXPOSURE CONTROL SYSTEM. TEHRAN UNIVERSITY MEDICAL JOURNAL (TUMJ), 75(7), 496-503. SID. https://sid.ir/paper/38835/en

Vancouver: Copy

KHORRAMIAN DARYOUSH, SISTANI SOROUSH, BANAEI AMIN, BIJARI SALAR. ESTIMATION AND ASSESSMENT OF THE EFFECTIVE DOSES FOR RADIOSENSITIVE ORGANS IN WOMEN UNDERGOING CHEST CT SCANS WITH OR WITHOUT AUTOMATIC EXPOSURE CONTROL SYSTEM. TEHRAN UNIVERSITY MEDICAL JOURNAL (TUMJ)[Internet]. 2017;75(7):496-503. Available from: https://sid.ir/paper/38835/en

IEEE: Copy

DARYOUSH KHORRAMIAN, SOROUSH SISTANI, AMIN BANAEI, and SALAR BIJARI, “ESTIMATION AND ASSESSMENT OF THE EFFECTIVE DOSES FOR RADIOSENSITIVE ORGANS IN WOMEN UNDERGOING CHEST CT SCANS WITH OR WITHOUT AUTOMATIC EXPOSURE CONTROL SYSTEM,” TEHRAN UNIVERSITY MEDICAL JOURNAL (TUMJ), vol. 75, no. 7, pp. 496–503, 2017, [Online]. Available: https://sid.ir/paper/38835/en

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