A study of optimization of MRI image examination in salivary gland diseases

涎腺及其周缘的病变是除了影像检查外需要大量信息才能正确诊断的疾病之一。影像检查的目的因病变种类不同而不同。例如，在肿瘤性质病变的情况下，重要的是检查病变的位置、不良程度以及位置与血管和神经系统的关系。另一方面，在炎症和自身免疫性疾病的情况下，唾液腺组织的变化及其功能成为检查的重点。磁共振成像检查是对出现在唾液腺和周围性疾病的疾病进行图像检查所必需的方法。我建议优化MR的影像检查，使检查程序出现在唾液腺和周长清楚。首先对每种疾病的影像特征信息进行整理和整合。然后是…尽可能多的计算量，如疾病的统计表现频率或符合率。这些工作的目的是帮助你的影像诊断。对于出现在唾液腺及其周围的病变，在MR影像检查前进行超声检查，判断是肿瘤性质还是炎症性病变，炎症性病变做轴位像(T1、T2、T2-FAT)，并在肿瘤性病变时增加冠状像(T1)，原则上优化影像检查。在这项研究中，我重点检查了没有增加对比剂反转的情况。以正常唾液腺(腮腺：89个，颌下腺：82个)和肿瘤性病变(41例)、炎性病变(67例)和自身免疫性疾病的诊断为研究对象。通过添加T2-脂肪抑制，可以更多地限制T2图像高信号域的液体成分，并且对这一次打算的疾病，有效性很高。特别是干燥综合征和淋巴结转移的病例，T2-FAT的检查精度高成为可能。在MR唾液腺造影上，虽然3D图像(MIP)可以从任何方向观察，但当信号较弱时，唾液腺的搜索率较高，为1层20 mm图像。因此，我决定对肿瘤性病变使用3D图像(MIP)，对炎性病变使用20 mm的1层图像。我考虑过使用扩散图像作为保持图像信息客观性的手段，但因为使用期限有限，所以我改变了策略。我考虑了图像因素，它似乎对从保存的图像中进行区分诊断很有用。我表示唾液腺和病变部位的图像各像素信号强度相等，不太受窗宽或窗位等影响。在Sjorgren综合征中，我在正常唾液腺和涎腺炎之间有明显的区别。我可以利用它作为歧视诊断的指标。有少数病例，但可以用它来鉴别炎性淋巴结和转移性淋巴结。较少

The disorders of the salivary glands and its circumference are one of the diseases that we need a lot of information in addition to image examination to diagnose correctly. A purpose of image examination is different by the kind of a lesion. For one example, in case of tumor nature lesion, it is important to exam a position of a lesion, a bad degree and relation of a position with a blood vessel and the nervous system. For another, in case of inflammation and autoimmune disease, a change of a salivary glands organization and a function of that become important point of an examination. Examination of MR imaging is the method that is necessary for image examination of a disorder to appear in salivary glands and the circumference disorders. I suggest optimization of MR for image examination by making an examination procedure of a disorder to appear in salivary glands and the circumference clear. First arranging and integrate information of the image characteristic of each disorder. Then a … More utomating calculation such as statiscal manifestation frequency or conformity rate of a disorder so long as possible.The purpose of these works is helping your image diagnosis. For a disorder to appear in a salivary glands and the circumference, carried out sonography before MR image examination, and judged a tumor nature or inflammation nature lesion, and an inflammation nature lesion did an Axial image (T1, T2, T2-fat), and added a Coronal image (T1) on the occasion of tumorous lesion about optimization of image examination in a principle. In this study, I focus the examination that did not increase inversion of contrast medium. I took normal salivary glands (parotid gland: 89 glands, submandibular gland: 82 glands) and settled tumorous lesion (41 cases), inflammatory lesions (67 cases) and autoimmune disease of diagnosis as an object of study. It became possible to limit a liquid ingredient of high signal domain of T2 image more by adding T2-fat suppression and on a disorder intended for this time, the effectiveness was high. Especially, for Sjogren's syndrome and metastases to lymph nodes case the examination became possible that precision was high by T2-fat.On MR-sialography, while it was advantageous that I could observe form any kind of direction with 3D image (MIP), the search of the salivary glands was high of an image of 1 slice of 20mm when the signals were weak. As a result, I decide that I use 3D image (MIP) for the tumorous lesions and the image of 1 slice of 20mm for inflammatory lesions. I thought about the use of a diffusion image as means to keep objectivity in image information, but because a use period was limited, then I switched the policy. I considered the image factor that seems to be useful for discrimination diagnosis from a saved image. I expressed equality of the image of the each pixel signal strength of the salivary glands and lesion parts did not receive influence such as window width or level very much. In sjorgren's syndrome, I had a meaningful difference between normal salivary glands and sialoadenitis. I could take advantage of it as an index of a discrimination diagnosis. There were a few cases, but it was expected that we could use it for discrimination of an inflammatory lymph node and metastasis lymph node. Less