## Abstract Fifteen patients with cardiac or paracardiac masses underwent magnetic resonance (MR) imaging with spinโecho (n = 15), cine gradientโecho (n = 15), gadopentetate dimeglumineโenhanced spinโecho (n = 15), and TurboFLASH (fast lowโangle shot) (n = 7) sequences. All masses had either histol
Absolute EPR Spin Echo and Noise Intensities
โ Scribed by George A Rinard; Richard W Quine; Ruitian Song; Gareth R Eaton; Sandra S Eaton
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 196 KB
- Volume
- 140
- Category
- Article
- ISSN
- 1090-7807
No coin nor oath required. For personal study only.
โฆ Synopsis
EPR signal and noise, calculated from first principles, are compared with measured values of signal and noise on an S-band (ca. 2.7 GHz) EPR spectrometer for which all relevant gains and losses have been measured. Agreement is within the uncertainty of the calculations and the measurements. The calculational model that provided the good agreement is used to suggest approaches to optimizing spectrometer design.
๐ SIMILAR VOLUMES
## Abstract It has been shown previously that a significant reduction of the acoustic noise in standard, slow magnetic resonance imaging (MRI) sequences is achieved when the gradient pulses have long sinusoidal ramps. An improvement of this method is now presented for fast gradient echo (FLASH) and
The purpose of this study was to assess gradient magnetic-field-induced acoustic noise levels associated with the use of echo planar imaging (EPI) and three-dimensional fast spin echo (3D-FSE) pulse sequences. Acoustic noise measurements were obtained from two different high field-strength MR system