Clinical application of high-pitch excretory phase images during dual-source CT urography with stellar photon detector / 中国医学科学院学报
Acta Academiae Medicinae Sinicae
; (6): 516-521, 2014.
Article
em Zh
| WPRIM
| ID: wpr-329793
Biblioteca responsável:
WPRO
ABSTRACT
<p><b>OBJECTIVE</b>To retrospectively evaluate the clinical feasibility of high-pitch excretory phase images during dual-source CT urography with Stellar photon detector.</p><p><b>METHODS</b>Totally 100 patients received dual-source CT high-pitch urinary excretory phase scanning with Stellar photon detector [80 kV, ref.92 mAs, CARE Dose 4D and CARE kV, pitch of 3.0, filter back projection reconstruction algorithm (FBP)] (group A). Another 100 patients received dual-source CT high-pitch urinary excretory phase scanning with common detector(100 kV, ref.140 mAs, CARE Dose 4D, pitch of 3.0, FBP) (group B). Quantitative measurement of CT value of urinary segments (Hounsfield units), image noise (Hounsfield units), and effective radiation dose (millisievert) were compared using independent-samples t test between two groups. Urinary system subjective opacification scores were compared using Mann-Whitney U test between two groups.</p><p><b>RESULTS</b>There was no significant difference in subjective opacification score of intrarenal collecting system and ureters between two groups (all P>0.05). The group A images yielded significantly higher CT values of all urinary segments (all P<0.01). There was no significant difference in image noise (P>0.05). The effective radiation dose of group A (1.1 mSv) was significantly lower than that of group B (3.79 mSv) (P<0.01).</p><p><b>CONCLUSION</b>High-pitch low-tube-voltage during excretory phase dual-source CT urography with Stellar photon detector is feasible, with acceptable image noise and lower radiation dose.</p>
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Índice:
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Assunto principal:
Processamento de Imagem Assistida por Computador
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Urografia
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Estudos Retrospectivos
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Tomografia Computadorizada Espiral
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Métodos
Tipo de estudo:
Observational_studies
Limite:
Adolescent
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Adult
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Aged
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Aged80
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Female
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Humans
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Male
Idioma:
Zh
Revista:
Acta Academiae Medicinae Sinicae
Ano de publicação:
2014
Tipo de documento:
Article