Differences

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--- library:mri_brain [2025/03/04 15:40] – [Scan Coverage and Planning] scott
+++ library:mri_brain [2025/03/05 03:07] (current) – scott
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-=====Brain=====
+=====Brain MRI=====
 ====Scan Coverage and Planning====
 ===Sagittal Plane===
@@ Line 21: / Line 21: @@
 ===Typical Scan Protocol===
-The protocol below represents a full brain exam. There is variation depending on the clinical question and clinician preference. The **minimum** recommended sequences are in bold text.
+The protocol below represents a full brain exam. There is variation depending on the clinical question and clinician preference. The **minimum** recommended sequences are in bold text. Note that some sequences such as the DWI have specific use cases and should be considered required if their indication is present, ie if an ischemic stroke is the clinical question, don't skip the DWI.
 **Sagittal T2**\\
@@ Line 29: / Line 29: @@
 Axial DWI\\
 **Axial T1**\\
-_Contrast_\\
+__Contrast__\\
 Sagittal T1\\
 **Axial T1**\\
 Dorsal T1\\
+====Tips and Tricks====
+===Sequence Substitutions===
+With Brain MRI in particular, there are quite a few sequence variations that may be encountered or substituted. These different sequences may provide the same or similar image contrast, but have different SNR, be 3D vs 2D, or have additional special properties. As with all things in MRI, there are trade-offs and pros/cons with each sequence choice that will be noted below. The different sequences will be categorized by their image contrast. Please note that some sequences will be vendor or software level specific, so may not be available on every scanner.
+==T2* Contrast==
+{{:library:merge_profile.png?600|}} {{:library:swi_profile.png?600|}}{{:library:swi_artifact.png?600|}}
+==T1 Contrast==
+{{:library:t1_fse_profile.png?600|}}  {{:library:fspgrprofile.png?600|}}}}