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.
Article
in English
| 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 ANDMETHODS:
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.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Thorax
/
Chest Pain
/
Retrospective Studies
/
Electrocardiography
/
Cone-Beam Computed Tomography
/
Methods
Type of study:
Observational study
Limits:
Adult
/
Child
/
Humans
Language:
English
Journal:
Korean Journal of Radiology
Year:
2018
Type:
Article
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