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1 2009 20 2 .. 1. -------------- . 2. ----- RIS. 3. -------- DICOM. 4. ------ . 5. ---- . HIS.. HIS HIS . HIS .. CR . CT P CS . MRI.. DR. HIS . DSA . RI. PACS : picture archiving and communication system . CT MRI .. PACS PACS . Archive .. FTP File Transfer Protocol .. PACS CR CT MRI .. PACS .. PACS . 3D .. PACS .. PACS . DICOM .. 1 . byte . bps .. ICT . Information and Communication Technology PACS .. archiving . communication . T CT G MRI P DSA . PACS . DICOM DICOM DICOM. DICOM.. DICOM.. DICOM digital imaging and communications in medicine .. DICOM . DICOM . DICOM .. conformance statement . DICOM = . Print Management Print Management CT.

2 CT MRI. Service Class Service Class CT Storage Query/ Retrieve Service Class . SCU. Service Class SCU/SCP.. TCP/IP. TCP/IP .. Print Storage Service Storage Service . Management Service Class Class Class SCP.. TCP/IP.. CR 2140 1760 . US . CR XA Workstation DR 2010 670 . CT RT. CT. PET MM MRI XA MM 2294 1914. MRI. RI PET CT 512 512. RI US RT. MRI 512 512. US Workstation US 537 715 A . XA. CT MRI 666 888 B . US. DR 2048 2048. XA 960 1240. 12 bit RGB 8 bit .. 24 bit . Motion JPEG MPEG AVI .. DICOM JPEG JPEG2000 Wavelet .. D = R C G N byte . D byte . R pixel . C pixel . G bit 8 . N 1 . CT 250 512 pixel 12 bit . D = 512 512 2 250 byte 2-20.

3 = 125 MB .. 10-6 .. DICOM .. MRI 256 256 10~12 bit MB 512 512. CT MB 512 512 10~14 bit CR 2048 2048 10~14 bit 4096 4096. DR X MB 1024 1024 8~12 bit XA DSA, DA MB 1024 1024 12 bit DA 512 512 8 bit NM MB 128 128 8 bit MB 1024 1024 12 bit MB 640 480 8 bit MB 640 480 24 bit MB 640 480 24 bit . A. B. C.. 1 1 MB A B C 12 GB . MRI 200 150 CT 400 250 CR 1000 4 .. GB GB . MRI 1/2 . CT 1/2 . CR 1/2 .. 5 . PACS storage .. 1. 256 256 1 1 2 1 = 2. 12 . 2. 512 512 2 2 1 1/3 = 4/3. 8 1/3 . 3. 512 512 2 2 2 1/5 = 8/5. 16 1/5 . 4. 1024 1024 4 4 1 1/10 = 8/5. 8 1/10 . 5. 1024 1024 4 4 2 1/15 = 32/15. 10 1/15 . Fail safe Backup Database server Storage server Domain controller server server Cluster Cluster.

4 Active Standby Active Active Primary Secondary Fiber-Channel Fiber-Channel Path Switch Switch backup . tape . (LTO).. SAN. RAID . Storage Area Network .. UPS .. fail safe .. fool proof .. storage . DAS . NAS SAN server storage SCSI. SCSI FCS. FCS. server storage server storage server storage Fiber channel DAS direct attached storage NAS network attached storage SAN storage area network . UPS uninterruptible power supply .. RAID redundant array of independence/inexpensive disks .. LTO linear tape open .. bps bits per second . 1 . 1 Gbps 100MB . 100 10-6 8 1 109 = [sec]. MB byte byte bit Giga bit bit . 8MB CR 1 Gbps 1 . 2000 2000 10bit [2byte] 1000 Mbps 8 = 125 MB per sec 125 8 = 1 103 8 8 = 15.

5 Gbps Mbps MB Mbytes Mb Mbits .. Lossless .. Lossy JPEG JPEG2000 .. DCT DWT .. 8 24 8 .. 10 20 1 JPEG . Lossless JPEG JPEG-LS . 20 100 1 .. Motion JPEG. JPEG .. Motion JPEG2000 . MPEG Moving Picture Experts Group . JPEG Independent frame I-frame .. I-frame . I-frame .. MPEG-1 MPEG-2 MPEG-3 MPEG-4 .. CT MRI CR.. Mini-PACS .. HIS HIS HIS/RIS. CR .. VPN. PACS. HIS HIS .. HIS/RIS .. VPN . PACS RAID DR . DR . MRI . RIS CT RI. RAID RIS DB DB DSA. CT . HIS/RIS . HIS/RIS .. CR. HIS/RIS CR DR.. Web . VPN virtual private network .. virtual private network .. A B LAN VPN. VPN VPN . VPN. VPN .. router routing .. switching hub .. Firewall.

6 PACS .. Cathode-ray tube CRT liquid crystal display LCD .. LUT look up table . H pixel N inch . W pixel W H pixels DICOM (GSDF grayscale standard display function . N inch LUT .. VGA Video Graphics Array 640 480.. SXGA Super Video Graphics Array 800 600.. XGA eXtended Graphics Array 1024 768. 100 pixel . SXGA Super eXtended Graphics Array 1280 1024 1 M cd / m2 . UXGA Ultra eXtendedd Graphics Array 1600 1200 2 M . QXGA Quad-XGA 2048 1536 3 M . QSXGA Quad-SXGA 2560 2048 5 M . QUXGA Quad Ultra-XGA 3200 2400. 500 pixel JND Just Noticeable Difference .. DICOM Part14 .. JND JND .. GSDF Grayscale Standard Display Function . DICOM.)

7 [cd/mm2].. DICOM . 0 JND index 1024. [cd/mm2] . JND . 0 JND index 1024.. JIRA . JESRA X- 0093A-2010 .. cd/m2 . K . lx lu/m2 .. TG18-QC.. PACS .. Computer-Aided Diagnosis: CAD 3.