Comparison of selected photon shield and organ-based tube current modulation for radiation dose reduction in head computed tomography: A phantom study.
J Xray Sci Technol
; 31(4): 745-756, 2023.
Article
em En
| MEDLINE
| ID: mdl-37092211
ABSTRACT
OBJECTIVE:
The aim of this study is to investigate the radiation dose and image quality of head CT using SPS and OBTCM techniques.METHODS:
Three anthropomorphic head phantoms (1-yr-old, 5-yr-old, and adult) were used. Images were acquired using four modes (Default protocol, OBTCM, SPS, and SPS+OBTCM). Absorbed dose to the lens, anterior brain (brain_A), and posterior brain (brain_P) was measured and compared. Image noise and CNR were assessed in the selected regions of interest (ROIs).RESULTS:
Compared with that in the Default protocol, the absorbed dose to the lens reduced by up to 28.33%,71.38%, and 71.12% in OBTCM, SPS, and SPS+OBTCM, respectively. The noise level in OBTCM slightly (≤1.45HU) increased than that in Default protocol, and the SPS or SPS+OBTCM mode resulted in a quantitatively small increase (≤2.58HU) in three phantoms. There was no significant difference in CNR of different phantoms under varies scanning modes (pâ>â0.05).CONCLUSIONS:
During head CT examinations, the SPS mode can reduce the radiation dose while maintaining image quality. SPS+OBTCM couldn't further effectively reduce the absorbed dose to the lens for 1-yr and 5-yr-old phantoms. Thus, SPS mode in pediatric and SPS+OBTCM mode in adult are better than other modes, and should be used in clinical practice.Palavras-chave
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Base de dados:
MEDLINE
Assunto principal:
Proteção Radiológica
/
Redução da Medicação
Tipo de estudo:
Guideline
Limite:
Adult
/
Child
/
Humans
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article