Cahill P T, Vullo T, Hu J H, Wang Y, Deck M D, Manzo R, Weingarten K, Markisz J A
Department of Electrical Engineering, Polytechnic University, Brooklyn, NY, USA.
J Digit Imaging. 1998 Aug;11(3):126-36. doi: 10.1007/BF03168736.
With the advent of teleradiology and picture archiving and communication systems (PACS), the expense and time required for image transmission and long term image archiving become important. The use of validated image compression algorithms can greatly reduce these costs. A lossy, multispectral image compression scheme at compression ratios (CR) of 25:1 and 32:1 was used for a set of 26 different patient MR exams. The original and compressed/decompressed (CD) images sets were evaluated in a blinded fashion by four radiologists in two phases. The main objective was to determine whether radiologic interpretation would vary between the two types of CD image sets and the corresponding originals. In general, the compression algorithm caused a slight decrease in image quality; however, the interpretation of pathology did not change between the original and CD image sets. In only one case at the maximum CR = 32 did one of four radiologists change the interpretation of pathology after CD. In this study, lossy multispectral image compression of MR images at CR = 25 maintained diagnostic integrity. This could play a significant role in image storage and communications.
随着远程放射学以及图像存档与通信系统（PACS）的出现，图像传输和长期图像存档所需的费用和时间变得至关重要。使用经过验证的图像压缩算法可以大大降低这些成本。一种有损多光谱图像压缩方案，压缩比（CR）为25:1和32:1，用于一组26例不同患者的磁共振成像（MR）检查。原始图像集和压缩/解压缩（CD）图像集由四位放射科医生分两个阶段以盲法进行评估。主要目的是确定两种类型的CD图像集与相应的原始图像之间的放射学解读是否会有所不同。总体而言，压缩算法导致图像质量略有下降；然而，原始图像集和CD图像集之间对病变的解读没有变化。在最大压缩比CR = 32时，只有一例中四位放射科医生中有一位在CD后改变了对病变的解读。在本研究中，压缩比CR = 25时对MR图像进行有损多光谱图像压缩可保持诊断完整性。这在图像存储和通信中可能发挥重要作用。
