Development of the image processing system and the methods of image processing in cineradiography

电影放射摄影图像处理系统及图像处理方法的研制

• 批准号: 61480414
• 负责人: WADA Takuro
• 金额: $ 3.84万
• 依托单位: HIROSHIMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1987
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-61480414/
• 关键词: Cineradiography; 画像処理; 鮮鋭化; アニメーション; 嚥下

We designed and developed a digital image processing system. A TV camera was used as an input device of an x-ray image in each frame of cineradiographs. The images were digitized using a A/D converter and processed by an image processing unit or a computer. The processed images were stored in a hard disc unit, and then displayed continuously on a CRT display.Since images were processed with different ways, we investigated a possibility of the improvement of image quality.We found the sharpness of the images obtained from this system was reduced by a TV camera used and its reduction affected the image quality of the digital images. Therefore, a high resolution film digitizer (laser scanner) was used to get digital images instead of a TV camera. One can conclude that a TV camera is not useful to digitize the medical x-ray images.As a result of clinical examinations, edge enhancement by using unsharp masking technique with logarithmic conversion was effective for cineradiographs. In addition, the construction of the animation was also effective and stimulative.These processing might be quite useful to improve the diagnostic capability in cineradiography.

我们设计并开发了一个数字图像处理系统。一台电视摄像机被用作每帧x射线图像的输入设备。图像通过a /D转换器进行数字化处理，并由图像处理单元或计算机进行处理。处理后的图像存储在硬盘单元中，然后在CRT显示器上连续显示。由于图像的处理方式不同，我们探讨了提高图像质量的可能性。我们发现，该系统所获得的图像的清晰度由于电视摄像机的使用而降低，影响了数字图像的图像质量。因此，使用高分辨率的胶片数字化仪（激光扫描仪）来代替电视摄像机来获得数字图像。可以得出结论，电视摄像机对于医学x射线图像的数字化是没有用的。临床检查结果表明，采用对数转换的非锐化掩蔽技术对x线片的边缘增强是有效的。此外，动画的构建也是有效的和刺激的。这些处理可能对提高影像学诊断能力非常有用。

项目成果

小川正晃: 歯科・放射線. 26. 287-295 (1986)

小川正明：牙科/放射学 26. 287-295 (1986)

OGAWA,Masaaki: "A trial of digital image processing in cineradiography" Dental Radiology. 26. 287-295 (1986)

OGAWA，Masaaki：“电影放射摄影中数字图像处理的试验”牙科放射学。

鶴田仁史: 広島大学歯学雑誌. 19. 242-248 (1987)

鹤田仁：广岛大学牙科杂志 19. 242-248 (1987)

FUJITA,Minoru: "Digital image processing of dentomaxillofacial radiographs" Oral Surgery, Oral Medicine, Oral Pathology. 64. 485-493 (1987)

藤田稔：“牙颌面X光片的数字图像处理”口腔外科、口腔医学、口腔病理学。

藤田實: Oral Surgery, Oral Medicine, Oral Pathology. 64. 485-493 (1987)

Minoru Fujita：口腔外科、口腔医学、口腔病理学。64. 485-493 (1987)