Low-dose paediatric cardiac and thoracic computed tomography with prospective triggering: Is it possible at any heart rate?
Phys Med
; 49: 99-104, 2018 May.
Article
en En
| MEDLINE
| ID: mdl-29866350
ABSTRACT
OBJECTIVE:
To demonstrate that the use of step-and-shoot (SAS) mode in paediatric cardiac CT angiography (CCTA) is possible at heart rates (HR) greater than 65â¯bpm, allowing low-dose acquisition with single-source 64-slices CT.METHODS:
We retrospectively included 125 paediatric patients (0-6â¯years). CCTA was performed with SAS at diastolic phase in 31 patients (group D, HRâ¯<â¯65â¯bpm), at systolic phase in 45 patients (group S, HRâ¯≥â¯65â¯bpm) and with non-gated mode in 49 patients (group NG). Effective dose (ED) and image quality using a 3-grade scoring scale (1, excellent; 2, moderate; 3, insufficient) of group S were compared with group D for coronary examinations and group NG for entire thorax vascular anatomy.RESULTS:
For coronary indications, median ED was 0.6â¯mSv in group D versus 0.9â¯mSv in group S (pâ¯<â¯0.01). For whole thorax indications, median ED was 2.7â¯mSv in group NG versus 1.1â¯mSv in group S (pâ¯<â¯0.001). The mean image quality score was (1.4⯱â¯0.6) points in group D, (1.4⯱â¯0.7) in group S for coronary indications (pâ¯=â¯0.9), (1.3⯱â¯0.6) in group S for whole thorax indications and (2.0⯱â¯0.0) in group NG (pâ¯<â¯0.001).CONCLUSION:
SAS mode is feasible in children with HR greater than 65â¯bpm allowing low-dose CCTA. It provided comparable image quality in systole, compared to diastole. SAS at the systolic phase provided better image quality with less radiation dose compared to non-gated scans for whole thorax examinations.Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Dosis de Radiación
/
Radiografía Torácica
/
Tomografía Computarizada por Rayos X
/
Corazón
/
Frecuencia Cardíaca
Tipo de estudio:
Observational_studies
Límite:
Child
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Child, preschool
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Female
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Humans
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Infant
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Male
/
Newborn
Idioma:
En
Revista:
Phys Med
Asunto de la revista:
BIOFISICA
/
BIOLOGIA
/
MEDICINA
Año:
2018
Tipo del documento:
Article