Detection of lymph-node metastases in patients with gastric carcinoma: comparison of three MR imaging pulse sequences
| Autor: | Yukihiro Takagi, Motohisa Kato, Hiroaki Hoshi, Shigetoyo Saji, Yoshihiro Kawaguchi, Masako Kanematsu, Hiroshi Kondo, Hiroshi Takao, Fukada D, Takao Umemoto, Yasuyuki Sugiyama, Kiichi Miya, K. Kunieda |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Adult
Male medicine.medical_specialty Urology Metastasis Gastrectomy Stomach Neoplasms Abdomen medicine Carcinoma Humans Radiology Nuclear Medicine and imaging In patient Lymph node Aged Aged 80 and over Radiological and Ultrasound Technology medicine.diagnostic_test Pulse (signal processing) business.industry Stomach Gastroenterology Reproducibility of Results Cancer Magnetic resonance imaging General Medicine Middle Aged medicine.disease Magnetic Resonance Imaging medicine.anatomical_structure ROC Curve Lymphatic Metastasis Lymph Node Excision Female Lymph Nodes Radiology business |
| Zdroj: | Abdominal Imaging. 25:25-29 |
| ISSN: | 1432-0509 0942-8925 |
| DOI: | 10.1007/s002619910004 |
| Popis: | To compare the diagnostic accuracy of magnetic resonance (MR) images obtained with three different pulse sequences for lymph-node metastases in patients with gastric cancer.T1-weighted spin-echo (SE), breath-hold T2-weighted fast SE, and triphasic gadolinium-enhanced dynamic gradient-recall-echo (GRE) MR images obtained in 16 patients with gastric carcinoma were retrospectively reviewed. Regional lymph nodes were assigned to four different groups, and image review was conducted on a lymph-node group-by-group basis; 64 lymph-node groups were reviewed by two radiologists. Relative sensitivity, specificity, and accuracy were determined based on the findings with definitive surgery and follow-up imaging. Diagnostic accuracy was determined by means of receiver-operating-characteristic (ROC) analysis.Relative sensitivities for lymph-node metastases with T1-weighted SE, breath-hold T2-weighted fast SE, and dynamic GRE images were 61%, 94%, and 59%, respectively. Relative sensitivity with breath-hold T2-weighted fast SE images was significantly greater than that with T1-weighted SE (p0.05) and dynamic GRE (p0.05) images. Diagnostic accuracy determined by ROC analysis was marginally higher with breath-hold T2-weighted fast SE (area under ROC curve [Az] = 0.87) than with T1-weighted SE (Az = 0.78, p = 0.08) and dynamic GRE (Az = 0.79, p = 0.12) images.Breath-hold T2-weighted fast SE sequence is useful in the detection of regional lymph-node metastases in patients with gastric carcinoma. |
| Databáze: | OpenAIRE |
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