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MRCP stands for?
- Magnetic Resonance CholangioPancreatography
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If MD script mentions Numbness what protocol?
- - run the Demyelinating protocol
- - same as routine w additional scan TRS GE T2*
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Paraesthesia
- - (пэрэсти'жия)
- - abnormal sensation, typically tingling or pricking
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If MD script mentions Paraesthesia what protocol?
- - run the Demyelinating protocol
- - same as routine w additional scan TRS GE T2*
Paraesthesia - (пэрэсти'жия) abnormal sensation, typically tingling or pricking
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If MD script mentions optic neuritis what protocol?
- - run the Demyelinating protocol
- - same as routine w additional scan TRS GE T2*
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abnormal sensation, typically tingling or pricking
Paraesthesia (пэрэсти'жия)
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If Trauma what additional brain scan?
TRS GE T2*
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If CVA what protocol?
- NO Brain-Diffusion
- Routine + TRS GE T2*
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If Pt > 65 what additional brain scan?
TRS GE T2*
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If brain MRI is combined with carotid MRA what additional brain scan?
TRS DW
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If Seizures what additional brain scan?
COR T2
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If Lymes Disease what protocol?
Brain-Demyelinating protocol w additional TRS GE T2* scan
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Protocol for MS?
Brain-Demyelinating protocol w additional TRS GE T2* scan
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TIA
- Transient Ischemic Attack
- - stroke that lasts only a few minutes
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If TIA what protocol?
- Brain-Diffusion Weighted Imaging
- TIA - Transient Ischemic Attack
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stroke that lasts only a few minutes
- TIA - Transient Ischemic Attack
- - stroke that lasts only a few minutes
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If brain infarct what protocol?
Brain-Diffusion Weighted Imaging
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Stacks vs. Slices in spine
If the Rx is for metastatic or infectious related issues but none are seen on the SAG T2 or T1 images...
- slices should be positioned for a routine exam
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NEX
- - NEX - Number of Excitations
- - or
- - NSA - Number of Signal Averages
- - how many times each line of k-space data is acquired during the scan
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NSA
- - NSA - Number of Signal Averages
- - or
- - NEX - Number of Excitations
- - how many times each line of k-space data is acquired during the scan
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How to to improve SNR using NSA / NEX?
- - if we x2 NEX, it will
- - increase SNR by 140%
- but
- - x2 Scan Time
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NEX and slice thickness
- Slice = 4mm
- SNR = 1
- NEX = 1
- Time = 2min
- if Slice = 2mm (High Res)
- what will happened with SNR, NEX and Time?
- If Slice changed form 4mm to 2mm (High Res)
- - we'll lose SNR by = 0.49 (49%)
- - to compensate SNG, NEX must be 3
- - but
- - Time will be x3 (6min)
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NEX and FOV
- If FOV decreased...
- SNR ?
- FOV↓ - SNR↓
- To compensate SNR
- 1) Matrix Size↓ - Image Quality↓
- 2) NEX↑ - Image Quality↑, but Scan Time↑
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NEX and FOV for SAG C-spine or L-spine?
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If Pt has scoliosis
2 NEX COR T1
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When a patient returns for additional views that require stack in spine?
DICOM the sag scout
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If the Rx is for metastatic or infectious related issues and lesions are seen...
- stack views should be positioned
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CP Angle Tumors
CPA - Cerebellopontine angle - most common neoplasms in the posterior fossa
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Cerebellopontine angle
- CP Angle Tumors
- - most common neoplasms in the posterior fossa
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Demyelinating Disease
- - damage to the protective covering (myelin sheath) that surrounds nerve fibers in brain, optic nerves and spinal cord
- - MS
- - Lymes
- - Paraesthesia
- - Optic Neuritis
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Paraesthesia
- - Demyelinating Disease
- - abnormal sensation
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Optic Neuritis
- - Demyelinating Disease
- - inflammation of optic nerves
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Trigeminal Neuralgia
- chronic pain affects the trigeminal nerve, which carries sensation from the face to the brain
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Schwannoma
- tumor of the tissue that covers nerves
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Bells Palsy
- muscles on one side of your face become weak or paralyzed
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abnormal sensation
Paraesthesia
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inflammation of optic nerves
Optic Neuritis
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any condition causing damage to the protective covering (myelin sheath) that surrounds nerve fibers in brain, optic nerves and spinal cord
Demyelinating Disease
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chronic pain affects the trigeminal nerve, which carries sensation from the face to the brain
Trigeminal Neuralgia
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tumor of the tissue that covers nerves
Schwannoma
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muscles on one side of your face become weak or paralyzed
Bells Palsy
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