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Clinical application of dual-source computed tomographic urography using dual-energy virtual non enhanced computed tomography / 中国医学科学院学报
Acta Academiae Medicinae Sinicae ; (6): 649-654, 2010.
Artículo en Chino | WPRIM | ID: wpr-341482
ABSTRACT
<p><b>OBJECTIVE</b>To evaluate the clinical feasibility of dual-source computed tomographic urography using dual-energy virtual non-enhanced CT.</p><p><b>METHODS</b>Totally 240 patients received dual-source CT, which included true non-enhanced CT (TNCT) , nephrographic phase scanning with dual-energy mode (100kVp/230mAs and Sn140kVp/178mAs) , and excretory phase scanning. A contrast bolus injection of 100 ml (370 mgI/ml) contrast agent was applied (4.5ml/s) , followed by 100ml normal saline (4.5ml/s) . Virtual non-enhanced CT (VNCT) image sets were reformatted from 'Liver VNC ' software. The mean CT number, noise, signal to noise ratio (SNR) , image quality, and radiation dose were compared between TNCT and VNCT image sets.</p><p><b>RESULTS</b>There was no significant difference in mean CT numbers of all organs (P>0.05) . However, VNCT images had significantly lower noise and higher SNR than TNCT images (both P<0.05) . Image quality of VNCT was lower than that of TNCT without significant difference (P>0.05) . Radiation dose of nephrographic phase with dual-energy mode was significantly higher than that of TNCT and excretory phase scanning (P<0.05) .</p><p><b>CONCLUSION</b>Dual-energy VNCT requires less radiation dose and therefore has a potential to replace TNCT in the dual-source CT urography.</p>
Asunto(s)
Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Dosis de Radiación / Urografía / Tomografía Computarizada por Rayos X / Imagen Radiográfica por Emisión de Doble Fotón / Reproducibilidad de los Resultados / Sensibilidad y Especificidad / Relación Señal-Ruido / Métodos Tipo de estudio: Estudio diagnóstico Límite: Adolescente / Adulto / Anciano / Aged80 / Femenino / Humanos / Masculino Idioma: Chino Revista: Acta Academiae Medicinae Sinicae Año: 2010 Tipo del documento: Artículo

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Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Dosis de Radiación / Urografía / Tomografía Computarizada por Rayos X / Imagen Radiográfica por Emisión de Doble Fotón / Reproducibilidad de los Resultados / Sensibilidad y Especificidad / Relación Señal-Ruido / Métodos Tipo de estudio: Estudio diagnóstico Límite: Adolescente / Adulto / Anciano / Aged80 / Femenino / Humanos / Masculino Idioma: Chino Revista: Acta Academiae Medicinae Sinicae Año: 2010 Tipo del documento: Artículo