Accuracy of whole-body diffusion-weighted MRI (WB-DWI/MRI) in diagnosis, staging and follow-up of gastric cancer, in comparison to CT: a pilot study

被引:32
作者
De Vuysere, Sofie [1 ,2 ]
Vandecaveye, Vincent [1 ]
De Bruecker, Yves [2 ]
Carton, Saskia [3 ]
Vermeiren, Koen [4 ]
Tollens, Tim [4 ]
De Keyzer, Frederik [1 ]
Dresen, Raphaela Carmen [1 ]
机构
[1] Katholieke Univ Leuven, Univ Hosp Leuven, Dept Radiol, Herestr 49, B-3000 Leuven, Belgium
[2] Imelda Hosp Bonheiden, Dept Radiol, Imeldalaan 9, B-2820 Bonheiden, Belgium
[3] Imelda Hosp Bonheiden, Dept Gastroenterol, Imeldalaan 9, B-2820 Bonheiden, Belgium
[4] Imelda Hosp Bonheiden, Dept Surg, Imeldalaan 9, B-2820 Bonheiden, Belgium
关键词
WB-DWI; MRI; Diffusion-weighted imaging (DWI); Magnetic resonance imaging (MRI); Computed tomography (CT); Stomach neoplasm; Neoplasm metastases; Neoplasm staging; Peritoneal neoplasms; PERITONEAL CARCINOMATOSIS; COMPUTED-TOMOGRAPHY; CURATIVE RESECTION; OVARIAN-CANCER; INDEX PCI; PET/CT; NODE; MDCT; METASTASES; RECURRENCE;
D O I
10.1186/s12880-021-00550-2
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
Background Accurate staging of patients with gastric cancer is necessary for selection of the most appropriate and personalized therapy. Computed tomography (CT) is currently used as primary staging tool, being widely available with a relatively high accuracy for the detection of parenchymal metastases, but with low sensitivity for the detection of peritoneal metastases. Magnetic resonance imaging (MRI) with diffusion-weighted imaging (DWI) has a very high contrast resolution, suggesting a higher diagnostic performance in the detection of small peritoneal lesions. The aim of this study was to retrospectively evaluate the added value of whole-body diffusion-weighted MRI (WB-DWI/MRI) to CT for detection of peritoneal carcinomatosis (PC) and distant metastases in the preoperative staging of gastric cancer. Methods This retrospective study included thirty-two patients with a suspicion of gastric cancer/recurrence, who underwent WB-DWI/MRI at 1.5 T, in addition to CT of thorax and abdomen. Images were evaluated by two experienced abdominal radiologists in consensus. Histopathology, laparoscopy and/or 1-year follow-up were used as reference standard. Results For overall tumour detection (n = 32), CT sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) was 83.3%, 100%, 100% and 82.4% respectively. For WB-DWI/MRI these values were 100%, 92.9%, 94.7% and 100%, respectively. For staging (n = 18) malignant lymph nodes and metastases, CT had a sensitivity, specificity/PPV/NPV of 50%/100%/100%/71.4%, and 15.4%/100%/100%/31.3% respectively. For WB-DWI/MRI, all values were 100%, for both malignant lymph nodes and metastases. WB-DWI/MRI was significantly better than CT in detecting tumour infiltration of the mesenteric root, serosal involvement of the small bowel and peritoneal metastases for which WB-DWI/MRI was correct in 100% of these cases, CT 0%. Conclusions WB-DWI/MRI is highly accurate for diagnosis, staging and follow-up of patients with suspected gastric cancer.
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页数:9
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