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INTRODUCTION TO COMPUTERS

INTRODUCTION TO COMPUTERS

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INTRODUCTION TO COMPUTERS

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  1. INTRODUCTION TO COMPUTERS

  2. TOMOGRAPHIC RECONSTRUCTION

  3. DATA RECONSTRUCTION--COMPUTER

  4. COMPUTER:A MACHINE FOR SOLVING PROBLEMS.

  5. MODERN COMPUTER:HIGH SPEED ELECTRONIC MACHINE THAT ACCEPTS INFORMATION IN THE FORM OF DATA AND INSTRUCTIONSTHROUGH SOME INPUT DEVICE AND PROCESSES THAT INFORMATION WITH ARITHMETIC AND LOGIC OPERATIONS STORED IN ITS MEMORY

  6. INPUT PROCESSING OUTPUT

  7. COMPUTER SYSTEMS HARDWARE SOFTWARE PEOPLE

  8. HARDWARE-PHYSICAL COMPONENTS

  9. SOFTWARE-INSTRUCTIONS

  10. PEOPLE & COMPUTERS

  11. HARDWARE SCHEME SECONDARY STORAGE: HARD DRIVE MOD CD MAGNETIC TAPE INPUT DEVICES: KEYBOARD MOUSE TOUCH SCREEN TRACK BALL ARRAY PROCESSOR OUTPUT DEVICES: VIDEO MONITOR PRINTER MEMORY COMMUNICATIONS DEVICES

  12. INPUT DEVICES • KEYBOARD • MOUSE • TOUCH SCREEN • TRACK BALL

  13. OUTPUT DEVICES • VIDEO MONITOR (CRT) • PRINTERS

  14. PRINTER

  15. TOUCH SCREEN CRT TRACKBALL KEYBOARD

  16. STORAGE DEVICES • HARD DRIVE – SCANNER PATIENT DIRECTORY BACK UP - ARCHIVING • CD • MOD • MAGNETIC TAPE

  17. MORE DATA IS STORED IF: IT’S COMPRESSED

  18. MEMORY • ROM • RAM

  19. ROM –READ ONLY MEMORY NONVOLATILE – AFTER THE COMPUTER IS TURNED OFF ITS CONTENT IS STILL INTACT

  20. RAM RANDOM ACCESS MEMORY VOLATILE – AFTER THE COMPUTER IS TURNED OFF ITS CONTENT IS LOST

  21. SOFTWARE • SYSTEM SOFTWARE • APPLICATION SOFTWARE

  22. SYSTEM SOFTWARE (OPERATING SYSTEM) • WINDOWS • MAC OS • UNIX • LINUX

  23. APPLICATION SOFTWARE

  24. COMPUTERS CLASSIFICATION • SUPERCOMPUTERS • MAINFRAME • MINI – COMPUTERS (COMPUTED TOMOGRAPHY) • MICRO-COMPUTERS (PERSONAL)

  25. DATA PROCESSING: • SERIAL • MULTITASKING • MULTIPROCESSING

  26. DATA FLOW MEMORY PROCESSOR BUS

  27. SERIAL PROCESSINGFIRST COME FIRST SERVE, ONE AT A TIME.

  28. MULTITASKING

  29. MULTIPROCESSING • MULTIPLE PROCESSORS THE MORE PROCESSOR THE QUICKER (SHORTER) THE RECONSTRUCTION OF DATA

  30. COMMUNICATION DEVICES • MODEM • NIC

  31. MODEM

  32. NETWORK INTERFACE CARD

  33. PACS – PICTURE ARCHIVING AND COMMUNICATION SYSTEM • IT’S A COMPUTER NETWORK • IT’S LINKED TO HOSPITAL INFO SYSTEM (HIS) AND RADIOLOGY INFO SYSTEM (RIS)

  34. COMPUTER NETWORK

  35. COMPONENTS OF FULL SERVICE PACS • IMAGE AQUSITION • IMAGE DISPLAY AND INTERPRETATION • IMAGE STORAGE AND RETRIEVAL • COMMUNICATION NETWORKS

  36. IMAGE ACQUSITION

  37. DISPLAY

  38. STORAGE

  39. SERVER In information technology, a server is a computer system that provides services to other computer systems—called clients—over a computer network

  40. COMMUNICATION -NETWORK

  41. PACS ARCHIVING • An archive is a collection of computer files that have been packaged together for backup, to transport to some other location, for saving away from the computer so that more hard disk storage can be made available, or for some other purpose. An archive can include a simple list of files or files organized under a directory or catalog structure (depending on how a particular program supports archiving).

  42. PACS JUKEBOX

  43. COMPRESSION FOR ARCHIVING • LOSSLESS • LOOSY

  44. Lossless data compression is a class of data compression algorithms that allows the exact original data to be reconstructed from the compressed data. It reduces the file size of an image but results in exactly the same data after decoding.

  45. lossy data compression, which does not allow the exact original data to be reconstructed from the compressed data. It modifies the image such that the original pixel values cannot be reconstructed anymore, although the decoded image might look very similar or even identical when compared to it’s original