The utility of Gd-DTPA on MRI of head and neck tumors.
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概要
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MRI (magnetic resonance imaging), along with CT (computed tomography), has become an essential imaging tool in the evaluation of head and neck tumors. Especially, since MRI has several advantages over CT, such as its superior soft tissue contrast and its less artifact from the base of the skull, air in the paranasal sinuses, and dental fillings, we feel that MRI is an excellent modality in the evaluation of oral and maxillo-facial lesions. However, it is felt that MRI has relatively low lesion specificity.<BR>This investigation was undertaken to evaluate the clinical utility of MRI with Gd-DTPA (Gadolinium-diethylenetriamine pentaacetic acid) in the head and neck tumors. Ten patients with head and neck tumors were analyzed in this study. The results were as follows:<BR>1) In cases of squamous cell carcinoma, tumors were weakly enhanced and showed low signal intensity compared with fat signal intensity.<BR>2) In this study, there was a tumor that we could evaluate lesion conspicuity neither on non enhanced T1 and T2 weighted images nor on Gd-DTPA-enhanced T1 weighted images.<BR>3) In the case of squamous cell carcinoma of the maxillary sinus, we could differentiate the tumor itself from secretions on Gd-DTPA-enhanced T1 weighted images.<BR>4) In cases of squamous cell carcinoma of the tongue, which were easily affected by motion artifacts, we felt that Gd-DTPA-enhanced T1 weighted images were superior in terms of signal-to-noise ratio to T2 weighted images. We also felt that the Gd-DTPA-enhanced T1 weighted images were superior to T1 weighted images in terms of contrast between the tumor and the surrounding tissues.<BR>5) In the recurrent case of adenoid cystic carcinoma, since the tumor were surrounded by fat degenerated tissues, the contrast between the tumor and the surrounding tissues was inferior to noncontrast T1 weighted images.
- 一般社団法人 日本口腔腫瘍学会の論文
一般社団法人 日本口腔腫瘍学会 | 論文
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