Electronic image archiving in the catheterization laboratory:multicenter comparison of enhanced optical storage with 10242digital and 35 mm cine-film

摘要

The authors developed a bi-directional 1249/625 lines converter,able to store and to replay high resolution (1249 lines) video images,from Component Record Video (CRV) Optical Laser (Analogue) Videodisks.Image quality was evaluated four ways: (1) The authors evaluatedQuantitative Coronary Angiography (QCA) on standard coronary testphantoms using enhanced CRV storage images digitally processed and alsocompared 78 arterial measurements ranging 0.65 to 4.85 mm both front thedigital hard disc (D) and the CRV optical disc (CRV), using the same QCAanalytical package. No systematic over or underestimation occurred, themean variability was inferior to 0.1 mm and results were similar to theresults obtained in the literature from digitally stored images. (2)Outside experts compared 593 static images stored on CRV discs to thesame images stored in 10242 digital format blinded to sourceof image. The four experts found no visual or medical difference in 98%of evaluated images and minor differences in the remainder. (3) 90representatives from 63 institutions compared images from both a digitalhard drive and the enhanced CRV optical (analogue) storage. During thetest they were blinded as to the source of the images. Therepresentatives found no difference in image resolution, qualitydiagnostic accuracy, and medical relevance. (4) Two of the experts alsocompared the enhanced CRV optically stored image to the image obtainedon simultaneously recorded 35 mm cine film, and found the enhanced CRVstored image to be superior or similar, but never inferior to the filmimage. It is concluded that High-Resolution CRV storage represents acost effective solution for excellent image quality equivalent todigitally stored images, permitting permanent electronic archivinginside the cath-lab, and allowing digital image processing and digitalDICOM network and CD-ROM based image communication