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Comparison of Chest Pain Protocols for Electrocardiography-Gated Dual-Source Cardiothoracic CT in Children and Adults: The Effect of Tube Current Saturation on Radiation Dose Reduction
Korean Journal of Radiology ; : 23-31, 2018.
Artigo em Inglês | WPRIM | ID: wpr-741389
ABSTRACT

OBJECTIVE:

To compare radiation doses between conventional and chest pain protocols using dual-source retrospectively electrocardiography (ECG)-gated cardiothoracic computed tomography (CT) in children and adults and assess the effect of tube current saturation on radiation dose reduction. MATERIALS AND

METHODS:

This study included 104 patients (16.6 ± 7.7 years, range 5–48 years) that were divided into two groups those with and those without tube current saturation. The estimated radiation doses of retrospectively ECG-gated spiral cardiothoracic CT were compared between conventional, uniphasic, and biphasic chest pain protocols acquired with the same imaging parameters in the same patients by using paired t tests. Dose reduction percentages, patient ages, volume CT dose index values, and tube current time products per rotation were compared between the two groups by using unpaired t tests. A p value 0.05); the groups with tube current saturation showed significantly higher volume CT dose index values (p < 0.01) and tube current time product per rotation (p < 0.001) than the groups without tube current saturation in all protocols.

CONCLUSION:

The radiation dose of dual-source retrospectively ECG-gated spiral cardiothoracic CT can be reduced by approximately 15% by using the biphasic chest pain protocol instead of the conventional protocol in children and adults if radiation dose parameters are further optimized to avoid tube current saturation.
Assuntos

Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Tórax / Dor no Peito / Estudos Retrospectivos / Eletrocardiografia / Tomografia Computadorizada de Feixe Cônico / Métodos Tipo de estudo: Estudo observacional Limite: Adulto / Criança / Humanos Idioma: Inglês Revista: Korean Journal of Radiology Ano de publicação: 2018 Tipo de documento: Artigo

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Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Tórax / Dor no Peito / Estudos Retrospectivos / Eletrocardiografia / Tomografia Computadorizada de Feixe Cônico / Métodos Tipo de estudo: Estudo observacional Limite: Adulto / Criança / Humanos Idioma: Inglês Revista: Korean Journal of Radiology Ano de publicação: 2018 Tipo de documento: Artigo