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Volumetric MRI thermometry using a three‐dimensional stack‐of‐stars echo‐planar imaging pulse sequence
| Content Provider | Scilit |
|---|---|
| Author | Jonathan, Sumeeth V. Grissom, William A. |
| Copyright Year | 2017 |
| Description | Journal: Magnetic Resonance in Medicine To measure temperature over a large brain volume with fine spatiotemporal resolution. A three-dimensional stack-of-stars echo-planar imaging sequence combining echo-planar imaging and radial sampling with golden angle spacing was implemented at 3T for proton resonance frequency-shift temperature imaging. The sequence acquires a 188x188x43 image matrix with 1.5x1.5x2.75 mm3 spatial resolution. Temperature maps were reconstructed using sensitivity encoding (SENSE) image reconstruction followed by the image domain hybrid method, and using the k-space hybrid method. In vivo temperature maps were acquired without heating to measure temperature precision in the brain, and in a phantom during high-intensity focused ultrasound sonication. In vivo temperature standard deviation was less than 1°C at dynamic scan times down to 0.75 s. For a given frame rate, scanning at a minimum repetition time (TR) with minimum acceleration yielded the lowest standard deviation. With frame rates around 3 s, the scan was tolerant to a small number of receive coils, and temperature standard deviation was 48% higher than a standard two-dimensional Fourier transform temperature mapping scan, but provided whole-brain coverage. Phantom temperature maps with no visible aliasing were produced for dynamic scan times as short as 0.38 s. k-Space hybrid reconstructions were more tolerant to acceleration. Three-dimensional stack-of-stars echo-planar imaging temperature mapping provides volumetric brain coverage and fine spatiotemporal resolution. Magn Reson Med 79:2003-2013, 2018. © 2017 International Society for Magnetic Resonance in Medicine. |
| Related Links | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5803468/pdf |
| Ending Page | 2013 |
| Page Count | 11 |
| Starting Page | 2003 |
| e-ISSN | 15222594 |
| DOI | 10.1002/mrm.26862 |
| Journal | Magnetic Resonance in Medicine |
| Issue Number | 4 |
| Volume Number | 79 |
| Language | English |
| Publisher | Wiley-Blackwell |
| Publisher Date | 2017-08-07 |
| Access Restriction | Open |
| Subject Keyword | Journal: Magnetic Resonance in Medicine Radiology, Nuclear Medicine and Imaging Echo-planar Imaging High-intensity Focused Ultrasound Magnetic Resonance Imaging-guided Focused Ultrasound |
| Content Type | Text |
| Resource Type | Article |
