Mri stroke protocol

MRI protocol for stroke assessment is a group of CT is still the choice as the first imaging modality in acute stroke institutional protocols, not only because the availability and the easy and fast access to a CT scanner, but also due the better sensitivity for 1. Some institutions also apply a 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 A good protocol involves at least: • T1 weighted • plane: sagittal (or volumetric 3D) • sequence: fast-spin echo (T1 FSE) or gradient (e.g. T1 MPRAGE) • purpose: an anatomical evaluation. 2 • T2 weighted • plane: axial • sequence: • purpose: • loss of normal signal void in large arteries may be visible immediately • after 6-12 hours infarcted tissue becomes high signal 2 • sulcal effacement and mass effect develop and become maximal in the first few days • FLAIR • plane: axial • sequence: • purpose: • after 6-12 hours infarcted tissue becomes high signal 2 • sulcal effacement and mass effect develop and become maximal in the first few days • diffusion-weighted imaging (DWI) • plane: axial • sequence: • purpose: • early identification of ischemic stroke: diffusion restriction may be seen within minutes following the onset of ischemia 3 • correlates well with infarct core • differentiation of acute from chroni...

Plane Weighting Mode Slice Gap FAT SAT FOV Notes SAG T1 TSE 4mm 1mm None 23cm Scalp to Scalp AXIAL T2 TSE 4mm 1mm None 23cm Angle to Corpus- Skull Base to Vertex AXIAL T1 TSE 4mm 1mm None 23cm Angle to Corpus- Skull Base to Vertex AXIAL T2* GRE GRE 4mm 1mm None 23cm Angle to Corpus- Skull Base to Vertex AXIAL DWI 2mm Voxel SE EPI 3mm 0.3mm SPIR 23cm Angle to Corpus- Skull Base to Vertex AXIAL FLAIR TSE 4mm 1mm None 23cm Angle to Corpus- Skull Base to Vertex AXIAL ASL Single Phase FFE EPI 6mm 1mm None 23cm Place from top down. Do Not Send RAW Data to PACS AXIAL ASL Multi Phase FFE EPI 6mm 1mm None 23cm See screen capture for slice placement. Archive RAW Data to DVD

This page is for OHSU's MRI technologists and physicians. It outlines all sequences and protocols currently applied in our MRI section. Our radiologists work closely with OHSU MRI technologists in the art of creating optimal images using current technology. Protocols listed have been reviewed and approved by a radiologist. Need MRI imaging for research? - updated 4/28/2023 - added 5/18/2021 updated 5/11/2022 updated 5/11/2022 updated 5/11/2022 updated 3/25/2021 updated 9/8/20 added 4/28/2023 added 4/28/2023 Updated 10/12/2021 Updated 9/20/2021 -Added 6/13/2022 - Added 4/28/2023 - Added 4/28/2023 - Added 4/28/2023 - Added 4/28/2023 - Added 4/28/2023 - Added 4/28/2023 ANY INFECTION/OSTEO CASE REGARDLESS OF BODY PART: • If infection/osteo is a diagnostic consideration, please run 3 PLANES T1 without FS. (Infection cases aren't always ordered with contrast). • If for infection/osteo and is ordered with GAD, always run 3 PLANES T1 without FS PRE contrast. (Infection cases aren't always ordered with contrast). • If GAD is administered, all the post contrast imaging must be fat sat, there is zero value in non fat sat post contrast imaging for MSK. • DIFFICULT PATIENTS: Start exams with AX T1 non-fat sat sequences in case the exam is terminated early for difficult patients. IF HARDWARE IS PRESENT IN THE AREA OF INTEREST: • Try to assess beforehand whether or not hardware will interfere with protocol. Hardware doesn't necessarily mean you have to change the protocol. If available, ...

MRI protocol for a quick stroke assessment corresponds to a short protocol, usually just the DWI/ADC, adopted by some institutions as a complementary tool to the CT imaging in Please, refer to the article on 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) • plane: axial • sequence: • purpose: early identification of ischaemic stroke: diffusion restriction may be seen within minutes following the onset of ischaemia 1 • • • • • • • • • • • • • • • • temporal bone/IAM/CPA protocol • • • CSF flow • angiographic protocols • MRA • circle of Willis (COW) • carotid-vertebral system • MRV • head and neck • • sinonasal tract protocol • salivary glands protocol • oropharynx and oral cavity protocol • suprahyoid neck protocol • infrahyoid neck protocol • chest • mediastinum • • • cardiac • • • • • • • • • • • abdomen and pelvis • abdomen • • • • • liver and biliary tree • • • pancreas protocol • • ​anus and rectum • • • • • ​uterus and ovaries • • • • urological • • bladder cancer protocol • kidneys protocol • musculoskeletal • • • • • • • • • • •