Evaluation of Effective Dose in Non-contrast Computed Tomography (CT) of the Brain in Samutsakhon Hospital

Authors

  • Sudruethai Roedkerd Department of Radiology Samutsakhon Hospital

Keywords:

Volume computed tomography dose index, Dose length product, Effective dose, Diagnostic reference level

Abstract

The objective of this research was to evaluate the amount of Diagnostic reference levels (DRL) of radiation that patients received from CT brain without contrast injection at the diagnostic radiology Department of Samutsakhon Hospital and compared to the Diagnostic reference levels (DRL) and the reference dose values of the Department of Medical sciences ministry of Public health, Thailand. This was a descriptive retrospective study from a group of patients with CT brain without contrast injection at Samutsakhon Hospital from May to July 2023 at about 1,009 times. The information records of the radiation dose report on the display computerized tomography machine when the examination was complete and imported data into the Picture archiving and communication systems (PACS), including Volume computed tomography dose index (CTDIvol), Dose length product (DLP) and calculate the Effective dose (E). The results were the 75th percentile (P75) of the median Volume computed tomography dose index (CTDIvol) was 51.87 mGy and the 75th percentile of the median Dose length product (DLP) was 1133.00 mGy-cm. The average effective dose was 1.78 mSv. The reference dose of the Department of Medical Sciences revealed that the 75th percentile value of CTDIvol, DLP, and average effective dose was 62.0 mGy, 1128.0 mGy-cm, 2.4 mSv, respectively. In conclusion, the value of volume computed tomography dose index (CTDIvol) and effective dose of the diagnostic radiology Department of Samutsakhon Hospital were lower than the reference radiation dose in Thailand of the Department of Medical Sciences. The dose length product (DLP) was found to be higher than the national reference dose in Thailand. This might be caused by a too long scanning distance.

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References

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Published

2026-03-31

How to Cite

Roedkerd, S. (2026). Evaluation of Effective Dose in Non-contrast Computed Tomography (CT) of the Brain in Samutsakhon Hospital. Health Science and Nursing Samutsakhon Hospital Journal, 1(1), 1–15. retrieved from https://he05.tci-thaijo.org/index.php/HSN_SKHJ/article/view/7657

Issue

Vol. 1 No. 1 (2024): January-June 2024

Section

Original Article

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