Specific Absorption Rate and Specific Energy Dose: Comparison of 1.5-T versus 3.0-T Fetal MRI
| Autor: | N. Scott Adzick, Teresa Victoria, Hansel J. Otero, Christian A. Barrera, Camilo Jaimes, Michael S. Gee, Timothy P.L. Roberts, J. Christopher Edgar, Michael L. Francavilla, Suraj D. Serai |
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| Rok vydání: | 2020 |
| Předmět: |
Adult
Male Adolescent Gestational Age Signal-To-Noise Ratio 030218 nuclear medicine & medical imaging Young Adult 03 medical and health sciences Fetus 0302 clinical medicine Pregnancy Prenatal Diagnosis Fetal mri Humans Specific energy Medicine Radiology Nuclear Medicine and imaging Child business.industry Dose comparison fungi food and beverages Specific absorption rate Dose-Response Relationship Radiation Middle Aged Image enhancement Image Enhancement Magnetic Resonance Imaging 030220 oncology & carcinogenesis Female Nuclear medicine business |
| Zdroj: | Radiology. 295:664-674 |
| ISSN: | 1527-1315 0033-8419 |
| DOI: | 10.1148/radiol.2020191550 |
| Popis: | Background MRI performed at 3.0 T offers greater signal-to-noise ratio and better spatial resolution than does MRI performed at 1.5 T; however, for fetal MRI, there are concerns about the potential for greater radiofrequency energy administered to the fetus at 3.0-T MRI. Purpose To compare the specific absorption rate (SAR) and specific energy dose (SED) of fetal MRI at 1.5 and 3.0 T. Materials and Methods In this retrospective study, all fetal MRI examinations performed with 1.5- and 3.0-T scanners at one institution between July 2012 and October 2016 were evaluated. Two-dimensional (2D) and three-dimensional (3D) steady-state free precession (SSFP), single-shot fast spin-echo, 2D and 3D T1-weighted spoiled gradient-echo (SPGR), and echo-planar imaging sequences were performed. SAR, SED, accumulated SED, and acquisition time were retrieved from the Digital Imaging and Communications in Medicine header. Data are presented as mean ± standard deviation. Two one-sided tests with equivalence bounds of 0.5 (Cohen |
| Databáze: | OpenAIRE |
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