FSP Class-6 - Magnet - Shoulder Scan

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Author:
flashsmilenet
ID:
294526
Filename:
FSP Class-6 - Magnet - Shoulder Scan
Updated:
2015-03-21 18:03:09
Tags:
FSP Class Magnet Shoulder Scan
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FSP Class
Description:
FSP Class-6 - Magnet - Shoulder Scan
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  1. Magnet (types)
    • 1) Permanent
    • 2) Conductive
    • 3) Superconductive
  2. Heaviest magnet type
    Permanent
  3. Oldest magnet type
    Permanent
  4. Very low MF ?? magnet type
    • 0.2-0.5T
    • Permanent
  5. Noisy T2 magnet type
    Permanent
  6. Magnet type cannot do MRAs
    Permanent
  7. Magnet type cannot do FAT-SAT
    Permanent
  8. Very ambient magnet type (?-? Fo - if not will break)
    • Permanent
    • 65-70 Fo
  9. Resistive magnet - other name
    Conductive - Electrical
  10. Electrical magnet - other name
    Conductive - Resistive
  11. Conductive magnet - other names
    Resistive - Electrical
  12. High electricity (?-? Amp) magnet
    • Resistive - Electrical - Conductive
    • 100-150 Amp to maintain magnetism
  13. Cheap to obtain - exp to maintain magnet
    Resistive - Electrical - Conductive
  14. Using cooling system - ? antifreeze magnet
    • antifreeze (Ethylene Glycol)
    • Resistive - Electrical - Conductive
  15. Magnet cannot do Spectroscopy
    Resistive - Electrical - Conductive
  16. Movement of chemicals in organs (cancer) scan?
    Spectroscopy
  17. Spectroscopy
    movement of chemicals in organs (cancer) scan
  18. Superconductive Magnet - another name
    Hybrid
  19. Hybrid Magnet - another name
    Superconductive
  20. Most advance and popular Magnet
    Hybrid - Superconductive
  21. Full functionality Magnet
    Hybrid - Superconductive
  22. Very exp to obtain - cheap to maintain Magnet
    Hybrid - Superconductive
  23. Magnet using cooling system Helium-Nitrogen
    Hybrid - Superconductive
  24. Magnet (types) ...
    • 1) Permanent
    •  - oldest
    •  - original
    •  - heaviest
    •  - very low MF - 0.2-0.5T
    •  - noisy T2
    •  - limited funct - cannot do:
    •     - MRAs
    •     - FAT-SAT
    •  - To ambient (65-70 Fo - if not will break)
    • 2) Conductive
    •  - other names - Resistive - Electrical
    •  - high electricity (100-150 Amp) to maintain magnetism
    •  - cheap to obtain - exp to maintain
    •  - using cooling system - antifreeze (Ethylene Glycol)
    •   - limited funct - Spectroscopy (movement of chemicals in organs - cancer) 
    • 3) Hybrid
    •  - another name - Superconductive
    •  - most advance and popular
    •  - full functionality
    •  - very exp to obtain - cheap to maintain
    •  - b/c wire made of titanium insulated w copper in the Helium
    •  - Dewar - titanium -copper-Helium-Nitrogen
  25. Wider Bore Magnet (low vs nigh)
    • Low MF Magnet
    • good for claustrophobic
  26. ↧ SNR -  Magnet (low vs nigh)
    • Low MF Magnet
    • ↧ SNR - Signal to noise Ratio
  27. Limited functionality Magnet (low vs nigh)
    Low MF Magnet
  28. Low MF Magnet (char, adv, disadv)
    • - < 1T
    • - most permanent
    • - ↧ FF (limited by shielding)
    •      Disadvantages:
    • - Limited functionality
    • - ↧ SNR - Signal to noise Ratio
    •      Advantages:
    • - Wider Bore (good for claustrophobic)
  29. Full functionality Magnet (low vs nigh)
    High MF Magnet
  30. Excellent homogeneity Magnet (low vs nigh)
    High MF Magnet
  31. ↥ SNR - Magnet (low vs nigh)
    • High MF Magnet
    • ↥ SNR - Signal to noise Ratio
  32. ↥ CSA - Magnet (low vs nigh)
    • High MF Magnet
    • ↥ CSA - Chemical Shift Artifact
  33. Flared Magnet (low vs nigh)
    • High MF Magnet
    • narrower in the end (NOT good for claustrophobic)
  34. High MF Magnet (char, adv, disadv)
    • - 1-3 T
    •  - most modern
    •  - ↧ FF (limited be shielding)
    •      Advantages:
    •  - Full functionality
    •  - Excellent homogeneity
    •  - makes biopsy possible
    •  - ↥ SNR - Signal to noise Ratio
    •      Disadvantages:
    •  - ↥ CSA - Chemical Shift Artifact
    •  - Flared - narrower in the end (NOT good for claustrophobic)
  35. Homogeneity QA
    • Unit of m: ppm (Parts per million)
    • Diagnostic: 1-20 ppm
    • Smaller ppm: better resolution image
    • ppm = 1: best quality
    • ppm = 0: no image
  36. As high MF, as... ? ...CSA
    • high
    • CSA - Chemical Shift Artifact
  37. CSA calculation
    • - Chemical Shift Artifact
    • - ↥ MF - ↥ CSA
    • - ST of Bo x 3.5 = CSA
    •    - (1T) 42.6 x 3.5 x 1 = 149.1 MHG
    •    - (1.5T) 42.6 x 3.5 x 1.5 = 223.6
    •    - (3T) 42.6 x 3.5 x 3 = 447.2
  38. MF types
    • Bo - Main Magnet
    • B1 - RF coils
    • GRE - Gradients
  39. Loops of vires that detect and transmit MRI signal
    RF Coils
  40. RF Coils (term)
    Loops of vires that detect and transmit MRI signal
  41. RF Coils (designs)
    • 1) Linear
    • 2) Solenoidar
  42. RF Coils large in design
    Transceive
  43. RF Coils - signal uniformity NOT best
    Transceive
  44. RF Coils encompass part completely
    Transceive
  45. RF Coils - large coverage
    Transceive
  46. RF Coils with more RF absorption
    Transceive
  47. Surface touching RF Coils
    Receive only
  48. RF Coils w ↥ SNR
    • Receive only
    • ↥ SNR - Signal to Noise Ratio
  49. RF Coils w wrap-around artifact
    Receive only
  50. RF Coils using Decoupling Complex
    Receive only
  51. Plugged in "Body coil"
    Receive only
  52. RF Coils that if father away - ↧ signal
    Receive only
  53. RF Coils which signal uniformity NOT best
    Transceive
  54. Transceive RF Coils (term-adv-diadv)
    • - large in design
    •     Advantages:
    • - encompass part completely (Head, Body, Quad Extremity, Helm Hotz)
    • - large coverage (allow large field of view)
    •     Disadvantage:
    • - signal uniformity NOT best 
    • - more RF absorption (concern)
  55. Decoupling Complex
    • - used in Receive only RF Coils
    • - HD way unit in the system that prevent burning
  56. Receive only RF Coils (details)
    • - plugin in "Body coil" (transmitter) 
    • - surface touching
    •      Advantage:
    • - smaller 
    • - ↥ SNR - Signal to noise Ratio 
    • - Decoupling Complex - HD way unit in the system that prevent burning
    •     Disadvantage: 
    • - wrap-around artifact (b/c small) 
    • - if father away - ↧ signal
  57. RF Coils (types w details)
    • 1) Transceive
    •  - large in design
    •     Advantages:
    • - encompass part completely (Head, Body, Quad Extremity, Helm Hotz)
    • - large coverage (allow large field of view)
    •     Disadvantage:
    • - signal uniformity NOT best 
    • - more RF absorption (concern)
    • 2) Receive only
    •  - plugin in body coil (transmitter)
    •  - surface touching 
    •      Advantages:
    •  - smaller
    •  - ↥ SNR - Signal to noise Ratio
    •  - Decoupling Complex - HD way unit in the system that prevent burning
    •      Disadvantages: 
    •  - wrap-around artifact (b/c small)
    •  - if father away - ↧ signal
  58. Many coils in array to form one image C-T-L-spine
    Phased array
  59. Phased array
    many coils in array to form one image C-T-L-spine
  60. Operator Console
    technical factor are set and manipulated (protocols)
  61. Tech can control
    TR - TE
  62. Tech cannot control
    T1 - T2
  63. Filming
    • Single emulsion film in Dry Laser camera.
    • What you see - what you get
    • No focusing problem
  64. Archiving how long?
    18 years in case of litigation
  65. Hard Disk Archiving
    • - in the system 
    • - if 100% full, have to erase
  66. Modulator Optical Disk Archiving
    • - type of warm
    • - write once, read
  67. Reel to Reel Archiving
    chip
  68. PACS Archiving
    Pectoral Archival Communication System
  69. NIC Archiving
    • Network Interface Card
    • used by PACS
  70. Dr can read from home, used by PACS
    High Hawks
  71. High Hawks Archiving
    • Dr can read from home
    • used by PACS
  72. Archiving
    • - for 18 years in case of litigation
    • 1) Hard Disk
    •  - in the system
    •  - if 100% full, have to erase
    • 2) Modulator Optical Disk
    •  - type of warm
    •  - write once, read many
    • 3) CD
    • 4) Reel to Reel - chip
    • 5) PACS - Pectoral Archival Communication System
    •  - using NIC - Network Interface Card
    •  - Dr can read from home - High Hawks
  73. Loss Less
    • compression technique
    • you can retrieve any exam
  74. Lossy
    • compression technique
    • reduce large files
  75. Compression technique - reduce large files
    Lossy
  76. Compression technique - you can retrieve any exam
    Loss Less
  77. Computers
    • 8 Bits = 1 Byte
    • Use compression technique:
    •   1) Lossy - reduce large files
    •   2) Loss Less - you can retrieve any exam
  78. GUI
    • Graphic User Interphase
    •   - mouse
    •   - track ball
    •   - icons - most popular
    •   - forders
  79. Cross excitation
    If lines cross in spine scanning
  80. If lines cross in spine scanning
    "cross talk" or "cross excitation"
  81. Cross talk
    If lines cross in spine scanning
  82. Spine scanning
    • lines must be ⇈ to disk space
    • if not ⇈, False Positive
    • if lines cross - "cross talk" or "cross excitation"   
  83. Shoulder scanning
    • SSM - Supraspinatous Muscle
    • Coronal
    • - lines ⇈ to SSM and perp to glenoid fossa
    • Sagittal
    • - lines perp to SSM and ⇈ to glenoid fossa

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