Diffusion weighted imaging combined with magnetic resonance conventional sequences for the diagnosis of rectal cancer / 中国医学科学院学报
Acta Academiae Medicinae Sinicae
;
(6): 200-205, 2009.
Artigo
em Chinês
| WPRIM
| ID: wpr-259044
ABSTRACT
<p><b>OBJECTIVE</b>To evaluate the clinical value of diffusion weighted imaging (DWI) combined with conventional sequences of magnetic resonance imaging (T1 and T2-weighted imaging) for the diagnosis of rectal cancer.</p><p><b>METHODS</b>DWI and conventional sequences were performed in 29 patients with endoscopically diagnosed rectal cancer and 15 patients without rectal cancer. Two doctors who were blind to the history of the patients interpreted the imaging findings. The sensitivity and specificity of conventional sequences with and without DWI were analyzed using receiver operating characteristic curve (ROC).</p><p><b>RESULTS</b>The areas under ROC were 0.915 and 0.930 for conventional sequences alone, and 0.990 and 0.994 for conventional sequences with DWI, respectively, indicating that although both of them were optimal methods for the diagnosis of rectal cancer, the accuracy of conventional sequences with DWI was significantly superior to that of conventional sequence alone (P < 0.05). The Kappa value was 0.850 for conventional sequences alone and 0.858 for DWI with conventional sequences.</p><p><b>CONCLUSION</b>DWI was necessary for the diagnosis of rectal cancer when performing conventional sequences.</p>
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Neoplasias Retais
/
Imageamento por Ressonância Magnética
/
Adenocarcinoma
/
Curva ROC
/
Sensibilidade e Especificidade
/
Proctoscópios
/
Imagem de Difusão por Ressonância Magnética
/
Diagnóstico
/
Métodos
Tipo de estudo:
Estudo diagnóstico
/
Estudo prognóstico
Limite:
Idoso
/
Feminino
/
Humanos
/
Masculino
Idioma:
Chinês
Revista:
Acta Academiae Medicinae Sinicae
Ano de publicação:
2009
Tipo de documento:
Artigo
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