Water mobility of diffusion MRI in prediction of response to chemoembolization in liver cancer / 中华肿瘤杂志
Chinese Journal of Oncology
;
(12): 293-297, 2009.
Article
Dans Chinois
| WPRIM
| ID: wpr-293128
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the value of pretreatment and posttreatment changes of apparent diffusion coefficients (ADCs) in predicting response to chemoembolization in liver cancer.</p><p><b>METHODS</b>Patients with liver cancer were examined with diffusion-weighted MRI at two b values (0 and 500 s/mm(2)) before and after chemoemblization. Quantitative ADC maps were calculated using images under b values of 0 and 500 s/mm(2). The mean ADC values of lesions before and after chemoemblization were compared. The correlation of response to chemoembolization with ADC value was analyzed.</p><p><b>RESULTS</b>The mean value of pretreatment ADC in non-responding lesions were significantly higher than that in the responding lesions (1.687 x 10(-3) mm(2)/s vs. 1.278 x 10(-3) mm(2)/s, P < 0.05). The results of receiver operator characteristic (ROC) analysis showed that when a threshold ADC value was set on 1.618 x 10(-3) mm(2)/s, the sensitivity and specificity for identification of non-responding lesions were 96.0% and 77.8%, respectively. After transarterial chemoembolization, the responding lesions had a significant increase in ADC values than non-responding lesions (32.6% vs. 5.2%, P = 0.025). The results of ROC analysis indicated that when the changes of ADC value for identification of responding lesions before and after transarterial chemoembolization was > or = 16.2%, the sensitivity and specificity were 72% and 100%, respectively. However, no significant change was observed in normal liver parenchyma and spleen (P > 0.05).</p><p><b>CONCLUSION</b>Pretreatment mean ADC value can be used to predict the response to chemoembolization, and for selection of therapy in liver cancer. A significant increase in mean ADC can be observed if the lesions responds to chemoembolization.</p>
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Anatomopathologie
/
Tumeurs de l'estomac
/
Thérapeutique
/
Épirubicine
/
Valeur prédictive des tests
/
Sensibilité et spécificité
/
Cisplatine
/
Résultat thérapeutique
/
Mitomycine
/
Chimioembolisation thérapeutique
Type d'étude:
Etude diagnostique
/
Étude pronostique
Limites du sujet:
Adulte
/
Adulte très âgé
/
Femelle
/
Humains
/
Mâle
langue:
Chinois
Texte intégral:
Chinese Journal of Oncology
Année:
2009
Type:
Article
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