Data compression: effect on diagnostic accuracy in digital chest radiography.
Data compression: effect on diagnostic accuracy in digital chest radiography.
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数据压缩：对数字胸片诊断准确性的影响。
DOI：
10.1148/radiology.178.1.1984299
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发表时间：
1991
期刊：
影响因子：
19.7
通讯作者：
Yonekawa,H
中科院分区：
文献类型：
--
作者：
MacMahon,H;Doi,K;Sanada,S;Montner,SM;Giger,ML;Metz,CE;Nakamori,N;Yin,FF;Xu,XW;Yonekawa,H
高分辨率数字图像构成了非常大的数据集，传输速度相对较慢，存储成本也较高。正在开发数据压缩技术来解决这一问题，但在高压缩比下可能会发生显著的图像恶化。在这项研究中，作者评估了一种形式的自适应块余弦变换编码，这是一种新的压缩技术，可以在最小程度降低图像质量的情况下对数字射线照片进行相当大的压缩。为了确定数据压缩对诊断准确性的影响，对60张数字化胸片(2,048 x 2,048矩阵，1,024度灰色)进行了观察者测试，其中包含气胸、间质浸润性病变、结节和骨病变的细微例子。无压缩、25：1压缩和50：1压缩比的X线片以随机顺序呈现给12位放射科医生。结果表明，在这种压缩方案下，高达25：1的压缩比用于胸部放射学的初步诊断是可以接受的。
High-resolution digital images make up very large data sets that are relatively slow to transmit and expensive to store. Data compression techniques are being developed to address this problem, but significant image deterioration can occur at high compression ratios. In this study, the authors evaluated a form of adaptive block cosine transform coding, a new compression technique that allows considerable compression of digital radiographs with minimal degradation of image quality. To determine the effect of data compression on diagnostic accuracy, observer tests were performed with 60 digitized chest radiographs (2,048 x 2,048 matrix, 1,024 shades of gray) containing subtle examples of pneumothorax, interstitial infiltrate, nodules, and bone lesions. Radiographs with no compression, with 25:1 compression, and with 50:1 compression ratios were presented in randomized order to 12 radiologists. The results suggest that, with this compression scheme, compression ratios as high as 25:1 may be acceptable for primary diagnosis in chest radiology.