Brain screen protocol (MRI)
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Brain screen protocol (MRI)w/o
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Brain screen protocol is a simple non-contrast MRI protocol comprising a group of basic MRI sequences as a useful approach when imaging the brain when no particular condition is being sought (e.g. headache). The protocol is designed to obtain a good brain's general overview. Additionally, this sort of protocol forms the foundation of many other more specific protocols by merely adding a sequence or two.
Note: This article is intended to outline some general principles of protocol design. The specifics will vary depending on MRI hardware and software, radiologist's and referrer's preference, institutional protocols, patient factors (e.g. allergy) and time constraints.
Sequences
- diffusion weighted imaging (DWI)
- purpose: multiple possible purposes (from the identification of ischemic stroke to the assessment of active demyelination)
-
T2 SagittalA standard screening protocol might look like: -
FLAIRaxial
- purpose: assessment of white-matter disorders (e.g. chronic small vessel disease and demyelination diseases
-
T1
weightedAxial -
T2
weightedAxial-
plane:axial -
sequence:T2 FSE - purpose: evaluation of basal cisterns, ventricular system and subdural spaces, and good visualisation of flow voids in vessels
-
-
FLAIR-
plane:axial -
sequence:FLAIR -
purpose:assessment of white-matter disorders (e.g. chronic small vessel disease and demyelination diseases)
-
-
diffusion weighted imaging (DWI)-
plane:axial -
sequence:DWI: B=0, B=1000 andADC -
purpose:multiple possible purposes (from the identification of ischemic stroke to the assessment of activedemyelination)
-
-
susceptibility weighted imaging (SWI)
-
plane:axial - sequence: susceptibility weighted imaging (ideal) or T2*
- purpose: identify blood products or calcification
- only available on 1.5 scanner
-
-
MPGR axial
- do on patients with recent fall, mvc, any sort of head trauma
-<p><strong>Brain screen protocol</strong> is a simple non-contrast <a href="/articles/mri-protocols">MRI protocol</a> comprising a group of basic <a href="/articles/mri-sequences-overview">MRI sequences</a> as a useful approach when imaging the brain when no particular condition is being sought (e.g. headache). The protocol is designed to obtain a good brain's general overview. Additionally, this sort of protocol forms the foundation of many other more specific protocols by merely adding a sequence or two. </p><p><em>Note: This article is intended to outline some general principles of protocol design. The specifics will vary depending on MRI hardware and software, radiologist's and referrer's preference, institutional protocols, patient factors (e.g. allergy) and time constraints. </em></p><h4>Sequences</h4><p>A standard screening protocol might look like:</p><ul>- +<p><strong>Brain screen protocol</strong> is a simple non-contrast <a href="/articles/mri-protocols">MRI protocol</a> comprising a group of basic <a href="/articles/mri-sequences-overview">MRI sequences</a> as a useful approach when imaging the brain when no particular condition is being sought (e.g. headache). The protocol is designed to obtain a good brain's general overview. Additionally, this sort of protocol forms the foundation of many other more specific protocols by merely adding a sequence or two. </p><p><em>Note: This article is intended to outline some general principles of protocol design. The specifics will vary depending on MRI hardware and software, radiologist's and referrer's preference, institutional protocols, patient factors (e.g. allergy) and time constraints. </em></p><h4>Sequences</h4><ul>
-<strong>T1 weighted</strong><ul>-<li>-<em>plane:</em> sagittal (or volumetric 3D)</li>-<li>-<em>sequence:</em> fast-spin echo (<a href="/articles/t1-fse">T1 FSE</a>) or gradient (<a href="/articles/t1-mprage">T1 MPRAGE</a>)</li>-<li>-<em>purpose:</em> anatomical overview, which includes the soft tissues below the base of skull</li>-</ul>- +<strong><strong>diffusion weighted imaging (DWI)</strong></strong><ul><li>
- +<em>purpose:</em> multiple possible purposes (from the identification of ischemic stroke to the assessment of active <a href="/articles/demyelination">demyelination</a>)</li></ul>
- +<li><p><strong>T2 Sagittal</strong></p></li>
-<strong>T2 weighted</strong><ul>-<li>-<em>plane:</em> axial</li>-<li>-<em>sequence:</em> <a href="/articles/t2-fse">T2 FSE</a>- +<strong>FLAIR</strong> <strong>axial</strong><ul><li>
- +<em>purpose: </em>assessment of white-matter disorders (e.g. chronic small vessel disease and demyelination diseases</li></ul>
- +</ul><ul>
-<em>purpose: </em>evaluation of basal cisterns, ventricular system and subdural spaces, and good visualisation of flow voids in vessels</li>-</ul>- +<strong>T1 Axial</strong><ul><li>
- +<em>sequence:</em> fast-spin echo (<a href="/articles/t1-fse">T1 FSE</a>) or gradient (<a href="/articles/t1-mprage">T1 MPRAGE</a>)<em>purpose:</em> anatomical overview, which includes the soft tissues below the base of skull</li></ul>
-<strong>FLAIR</strong><ul>-<li>-<em>plane: </em>axial</li>-<li>-<em>sequence: </em><a href="/articles/fluid-attenuation-inversion-recovery">FLAIR</a>-</li>-<li>-<em>purpose: </em>assessment of white-matter disorders (e.g. chronic small vessel disease and demyelination diseases)</li>-</ul>-</li>-<li>-<strong>diffusion weighted imaging (DWI)</strong><ul>-<li>-<em>plane:</em> axial</li>-<li>-<em>sequence:</em> <a href="/articles/diffusion-weighted-imaging-1">DWI</a>: B=0, B=1000 and <a href="/articles/apparent-diffusion-coefficient-1">ADC</a> </li>-<li>-<em>purpose:</em> multiple possible purposes (from the identification of ischemic stroke to the assessment of active <a href="/articles/demyelination">demyelination</a>)</li>-</ul>- +<strong>T2 Axial</strong><ul><li>
- +<em>purpose: </em>evaluation of basal cisterns, ventricular system and subdural spaces, and good visualisation of flow voids in vessels</li></ul>
-<em>plane: </em>axial</li>-<li>- +<li>only available on 1.5 scanner</li>
- +<li>
- +<strong>MPGR axial</strong><ul><li>
- +<strong></strong>do on patients with recent fall, mvc, any sort of head trauma</li></ul>
- +</li>
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