Clinical application of dual-source computed tomographic urography using dual-energy virtual non enhanced computed tomography.
- Author:
Hao SUN
1
;
Hua-dan XUE
;
Wei LIU
;
Yu CHEN
;
Bai-yan SU
;
Xin SUI
;
Jie DE
;
Wei-di MING
;
Zheng-yu JIN
Author Information
- Publication Type:Journal Article
- MeSH: Adolescent; Adult; Aged; Aged, 80 and over; Female; Humans; Male; Middle Aged; Radiation Dosage; Radiography, Dual-Energy Scanned Projection; methods; Reproducibility of Results; Sensitivity and Specificity; Signal-To-Noise Ratio; Tomography, X-Ray Computed; methods; Urography; methods; Young Adult
- From: Acta Academiae Medicinae Sinicae 2010;32(6):649-654
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo evaluate the clinical feasibility of dual-source computed tomographic urography using dual-energy virtual non-enhanced CT.
METHODSTotally 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.
RESULTSThere 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) .
CONCLUSIONDual-energy VNCT requires less radiation dose and therefore has a potential to replace TNCT in the dual-source CT urography.
