Evaluation of the patient radiation doses from computed tomography in Ratchaburi hospital.
Keywords:
Diagnostic reference level, CT examination, CTDIvol, DLPAbstract
This retrospective descriptive study aimed to survey patient radiation doses from computed tomography in Ratchaburi hospital in the year 2021 and compared radiation doses with National Diagnostic Reference Levels in Thailand. Computed tomography dose index volume (CTDIvol) and Dose length product (DLP) of common CT examination were collected from patients who had performed CT examination in the year 2021 at the diagnostic radiology department, Ratchaburi hospital. The median value was used to represent the patient radiation doses. Subsequently, patient radiation doses from computed tomography in Ratchaburi hospital were compared to Thai national DRLs.
Results: Patient radiation doses of CT brain without contrast, brain with contrast, chest with and without contrast, abdominal CT without contrast, and abdominal CT with contrast were CTDIvol 62.5 mGy, DLP 1,278.0 mGy.cm, CTDIvol 58.1 mGy, DLP 1,343.5 mGy.cm, CTDIvol 9.2 mGy, DLP 406.5 mGy.cm, CTDIvol 9.9 mGy, DLP 581.0 mGy.cm and CTDIvol 10.0 mGy, DLP 592.5 mGy.cm, respectively. In comparison with National Diagnostic Reference Levels in Thailand 2021, patient radiation doses from computed tomography obtained from this study were lower than those reported from National Diagnostic Reference Levels in Thailand in 2021, except patient radiation doses of CT brain with and without contrast examinations.
Conclusion: Patient radiation doses of CT brain with and without contrast from computed tomography in Ratchaburi hospital were higher than National Diagnostic Reference Levels in Thailand 2021. Therefore, strategies should be implemented to optimize radiation exposure for patients in clinical practice in the future.
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