Response to chemotherapy in gastric adenocarcinoma with diffusion-weighted MRI and (18) F-FDG-PET/CT: correlation of apparent diffusion coefficient and partial volume corrected standardized uptake value with histological tumor regression grade.
J Magn Reson Imaging
; 40(5): 1147-57, 2014 Nov.
Article
en En
| MEDLINE
| ID: mdl-24214734
ABSTRACT
PURPOSE:
To assess whether changes in diffusion-weighted MRI (DW-MRI) and (18) F-fluoro-2-deoxyglucose positron emission tomography/computed tomography ((18) F-FDG PET/CT), correlate with treatment response to neoadjuvant therapy (NT), as expressed by tumor regression grade (TRG), from locally advanced gastric adenocarcinoma (GA). MATERIALS ANDMETHODS:
Seventeen patients underwent both DW-MRI and (18) F-FDG-PET/CT scans before and after the end of NT. Apparent diffusion coefficient (ADC) and mean standardized uptake value (SUV) corrected for partial volume effect (PVC-SUVBW-mean ) were evaluated and compared with histopathological TRG.RESULTS:
Pre- and post-NT and percentage changes for ADC and PVC-SUVBW-mean were assessed. Post-NT ADC and ΔADC showed a significant inverse correlation with TRG (r = -0.71; P = 0.0011 and r = -0.78; P = 0.00020, respectively) and significant differences in their mean values were found between responders (TRG 1-2-3) and nonresponders (TRG 4-5) (P = 0.0009; P = 0.000082, respectively). No correlations with TRG were found for pre-NT ADC and for all PVC-SUVBW-mean values as well as between ΔADC and Δ PVC-SUVBW-mean .CONCLUSION:
DW-MRI seems more accurate than (18) F-FDG-PET/CT and ADC modifications may represent a reproducible tool to assess tumor response for GA.Palabras clave
Texto completo:
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Base de datos:
MEDLINE
Asunto principal:
Neoplasias Gástricas
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Interpretación de Imagen Asistida por Computador
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Aumento de la Imagen
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Adenocarcinoma
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Protocolos de Quimioterapia Combinada Antineoplásica
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Tomografía Computarizada por Rayos X
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Fluorodesoxiglucosa F18
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Terapia Neoadyuvante
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Imagen de Difusión por Resonancia Magnética
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Tomografía de Emisión de Positrones
Tipo de estudio:
Observational_studies
/
Risk_factors_studies
Idioma:
En
Revista:
J Magn Reson Imaging
Asunto de la revista:
DIAGNOSTICO POR IMAGEM
Año:
2014
Tipo del documento:
Article