Diagnostic Imaging for Physical Therapists: Difference between revisions

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= Magnetic Resonance Imaging (MRI) =
= Diagnostic Imaging for Physical Therapists =


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= Radiography =
== Magnetic Resonance Imaging (MRI) ==


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An MRI is a map of hydrogen atoms within a body. &nbsp;Hydrogen atoms are ideal because they have a single proton and a large magnetic moment. &nbsp;Since approximately 75% of our bodies are made of H<sub>2</sub>0, MRI machines are able to take very detailed images of the viewed body region. &nbsp;The magnetic field created by the magnet causes resonance from each proton in the hydrogen atom. &nbsp;There are multiple types of MRI based on an image captured at different decay's of signal. &nbsp;A T1 weighted MRI captures early signal decay. &nbsp;A T2 weighted MRI captures the late stage of signal decay.


= Computerized Axial Tomography (CT Scan) =
==== T1 Weighted MRI ====


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*Demonstrates good anatomic structures<br>
*H<sub>2</sub>0, cortical bone, CSF, and ligaments appears darker
*Fat and meniscal tears appears bright


= Bone Scan =
==== T2 Weighted MRI ====


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*Demonstrates contrast between normal and abnormal
*H<sub>2</sub>0, CSF appears bright


==== Contra-Indications  ====


*Pacemaker
*Aneurysm clip
*Cochlear implant
*Orbital foreign body&nbsp;<br>


= ''References'' =
==== Avoid Projectiles  ====
 
*IV poles
*Scissors
*Oxygen tanks
*Stethoscopes
*Pens
*Paper clips
 
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== Radiography  ==
 
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== Computerized Axial Tomography (CT Scan)  ==
 
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== Bone Scan  ==
 
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= ''References'' =

Revision as of 23:08, 16 March 2012

Diagnostic Imaging for Physical Therapists[edit | edit source]

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Magnetic Resonance Imaging (MRI)[edit | edit source]

An MRI is a map of hydrogen atoms within a body.  Hydrogen atoms are ideal because they have a single proton and a large magnetic moment.  Since approximately 75% of our bodies are made of H20, MRI machines are able to take very detailed images of the viewed body region.  The magnetic field created by the magnet causes resonance from each proton in the hydrogen atom.  There are multiple types of MRI based on an image captured at different decay's of signal.  A T1 weighted MRI captures early signal decay.  A T2 weighted MRI captures the late stage of signal decay.

T1 Weighted MRI[edit | edit source]

  • Demonstrates good anatomic structures
  • H20, cortical bone, CSF, and ligaments appears darker
  • Fat and meniscal tears appears bright

T2 Weighted MRI[edit | edit source]

  • Demonstrates contrast between normal and abnormal
  • H20, CSF appears bright

Contra-Indications[edit | edit source]

  • Pacemaker
  • Aneurysm clip
  • Cochlear implant
  • Orbital foreign body 

Avoid Projectiles[edit | edit source]

  • IV poles
  • Scissors
  • Oxygen tanks
  • Stethoscopes
  • Pens
  • Paper clips


Radiography[edit | edit source]

(Text)


Computerized Axial Tomography (CT Scan)[edit | edit source]

(Text)


Bone Scan[edit | edit source]

(Text)


References[edit | edit source]

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