Clinical value and the choice basis of image examination in salivary gland diseases -mainly on MRI image diagnosis -

涎腺及其周围病变的影像检查要点因病变类型不同而不同。对于肿瘤性病变，病变的恶性程度和定位以及与血管和神经的位置关系是重要的。在炎症和自身免疫性疾病的情况下，唾液腺的形态变化和功能是重要的。本研究的目的是明确每种疾病在涎腺及其周围区域的MRI和其他影像检查的目的和选择步骤，并通过收集每种疾病的影像信息来支持诊断影像。其中良性涎腺肿瘤38例，恶性涎腺肿瘤8例，恶性淋巴瘤7例，恶性肿瘤6例，良性肿瘤5例，囊性病变4例，炎性病变4例。由于唾液腺和周围组织之间的对比度降低，X-CT平扫没有用处。涎腺造影术有助于研究病变部位与腺体的关系，但对定性诊断没有帮助。放射性核素显像对腺淋巴瘤有较高的诊断价值。MRI是最有用的检查，因为它获得了大量关于病变定位和定性诊断的信息。尽管MR-唾液造影的图像需要改进，但该方法可能是唾液造影的替代检查。由于每种疾病的病例数量和检查的病例数量不平衡，无法统计计算疾病的频率和适合率。

The important points in the imaging examination of disorders in the salivary gland and the surrounding area vary based on the types of lesions. In cases of tumorous lesions, malignancy and localization of lesions and positional relationship with the blood vessels and nerves are important. In cases of inflammation and autoimmune diseases, morphological changes in the salivary gland and the function are important. The purpose of this study was to define the purpose and selection procedures of MRI and other imaging examinations of each disease in the salivary gland and the surrounding area, and to support diagnostic imaging, by collecting image information of each disease.Seventy-two cases, in which histopathological or clinical diagnoses were established, were evaluated. The breakdown was benign salivary gland tumors (38), malignant salivary gland tumors (8), malignant lymphomas (7), malignant tumors (6), benign tumors (5), cysts (4), and inflammatory lesions (4).Echography is useful for differentiating tumorous lesions from inflammatory diseases, and is essential for screening disorders in the salivary gland and the surrounding area at the first examination. Plain X-CT was not useful due to decreased contrast between the salivary gland and the surrounding tissue. Sialography was useful for investigating the relationship between the localization of lesions and the glands ; however, it was not useful for qualitative diagnosis. RI scintigraphy was useful for the specific diagnosis of adenolymphoma. MRI was the most useful examination, because much information regarding the localization of lesions and qualitative diagnosis was obtained.Although improvement is required in the images of MR-sialography, this method may be an alternative examination for sialography. Statistical calculation of the frequency and the rate of fitness of diseases was not possible due to the imbalance of the case number of each disease and the number of examined cases.