Deep Learning-Based Reconstruction Improves the Image Quality of Low-Dose CT Colonography.
Acad Radiol
; 31(8): 3191-3199, 2024 Aug.
Article
em En
| MEDLINE
| ID: mdl-38290889
ABSTRACT
RATIONALE AND OBJECTIVES:
To evaluate the image quality of low-dose CT colonography (CTC) using deep learning-based reconstruction (DLR) compared to iterative reconstruction (IR). MATERIALS ANDMETHODS:
Adults included in the study were divided into four groups according to body mass index (BMI). Routine-dose (RD 120 kVp) CTC images were reconstructed with IR (RD-IR); low-dose (LD 100kVp) images were reconstructed with IR (LD-IR) and DLR (LD-DLR). The subjective image quality was rated on a 5-point scale by two radiologists independently. The parameters for objective image quality included noise, signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR). The Friedman test was used to compare the image quality among RD-IR, LD-IR and LD-DLR. The KruskalWallis test was used to compare the results among different BMI groups.RESULTS:
A total of 270 volunteers (mean age 47.94 years ± 11.57; 115 men) were included. The effective dose of low-dose CTC was decreased by approximately 83.18% (5.18mSv ± 0.86 vs. 0.86mSv ± 0.05, P < 0.001). The subjective image quality score of LD-DLR was superior to that of LD-IR (3.61 ± 0.56 vs. 2.70 ± 0.51, P < 0.001) and on par with the RD- IR's (3.61 ± 0.56 vs. 3.74 ± 0.52, P = 0.486). LD-DLR exhibited the lowest noise, and the maximum SNR and CNR compared to RD-IR and LD-IR (all P < 0.001). No statistical difference was found in the noise of LD-DLR images between different BMI groups (all P > 0.05).CONCLUSION:
Compared to IR, DLR provided low-dose CTC with superior image quality at an average radiation dose of 0.86mSv, which may be promising in future colorectal cancer screening.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Doses de Radiação
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Colonografia Tomográfica Computadorizada
/
Razão Sinal-Ruído
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Aprendizado Profundo
Limite:
Adult
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Female
/
Humans
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Male
/
Middle aged
Idioma:
En
Revista:
Acad Radiol
/
Acad. radiol
/
Academic radiology
Assunto da revista:
RADIOLOGIA
Ano de publicação:
2024
Tipo de documento:
Article
País de publicação:
Estados Unidos