The international angiographic compression study.
نویسندگان
چکیده
2000 by the America DICOM cardiac standard became universally accepted throughout the world as the only method appropriate for exchange of digital angiographic images. More recently, the DICOM Standards Committee has adopted a high-resolution standard, defined as 1024 1024 pixel images with up to 12 bits (4096 levels) of gray scale per pixel. The large quantities of digital data required to represent a cardiac angiographic study present a major challenge. In the standard DICOM file format, each cine frame contains 256 kilobytes of data. At a 30 frame per second (fps) acquisition rate, each second of cine requires 7·5 megabytes (MB). For 1024 1024 10 bit images, each second of imaging can require more than 35 MB. A typical diagnostic study 60 s in length and acquired at the lower resolution of 512 512 8 generates approximately 450 MB of digital data. The large size of these digital data files poses a number of operational challenges:
منابع مشابه
American College of Cardiology/ European Society of Cardiology international study of angiographic data compression phase I
METHODS At six centers, 71 angiographers each reviewed a set of 100 angiographic sequences. The 100 sequences were divided into four, 25-sequence subsets. Each subset of 25 was displayed either as original images or at one of three compression ratios (CRs) (6:1, 10:1 or 16:1). The effect of lossy compression on the sensitivity and specificity for detection of diagnostic features was determined....
متن کاملAmerican College of Cardiology/ European Society of Cardiology international study of angiographic data compression phase I. The effects of lossy data compression on recognition of diagnostic features in digital coronary angiography.
OBJECTIVES This study intended to determine the effect of varying degrees of lossy Joint Photographic Experts Group (JPEG) compression on detection of coronary angiographic features. Background Compression of digital coronary angiograms facilitates playback of images and decreases cost. There are little data on the effect of compression on the accuracy of coronary angiography. METHODS At six ...
متن کاملAmerican College of Cardiology/ European Society of Cardiology international study of angiographic data compression phase II
METHODS A series of 48 obstructed coronary segments were compressed/decompressed at CR 1:1 (uncompressed), 6:1, 10:1 and 16:1 and analyzed blindly and in random order using the QCA-CMS analytical software. Similar catheter and vessel startand end-points were used within each image quartet, respectively. All measurements were repeated after several weeks using newly selected startand end-points....
متن کاملIntroduction and background: the International Angiographic Compression study.
The current issues (April issue) of the Journal of the American College of Cardiology (JACC) and the European Heart Journal (Eur Heart J) contain three related manuscripts that report the findings of a major international clinical study of the impact of digital data compression on the diagnostic accuracy of coronary angiography. Because the topic is complex and most practitioners have a limited...
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ورودعنوان ژورنال:
- European heart journal
دوره 21 8 شماره
صفحات -
تاریخ انتشار 2000