| Performance of a novel piezoelectric motor at 4.7 T: applications and initial tests. | |
| | |
MedLine Citation:
|
PMID: 17826943 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
The focus of this report was to test the performance of a novel piezoelectric motor under high magnetic field strength conditions and to investigate its potential applications in small animal magnetic resonance imaging (MRI). The device is made entirely of nonferrous materials and consists of four piezoelectric ceramic plates connected to a threaded metal tube through which a screw migrates. Ultrasonic vibrations of the threads inherent to the tube result in rotational and translational motion of the screw. Potential applications of the piezoelectric motor were investigated at 4.7 T. Firstly, phantom studies showed the motor was capable of accurately delivering low injection volumes ( approximately 0.01 ml). Dynamic contrast-enhanced MRI (DCE-MRI) studies performed in vivo using serially acquired T1-weighted, spin-echo imaging demonstrated the ability of the motor to reliably administer MR contrast-enhancing agent into live tumor-bearing mice without the introduction of image artifacts. In a second set of experiments, the motor allowed for controlled, dynamic repositioning of an anatomic slice of interest in a live animal to magnetic field isocenter, which resulted in reduced geometric distortion and image artifact due to improved radiofrequency and gradient field homogeneity. In conclusion, piezoelectric motors are MR compatible and offer great potential for improving MRI efficiency and throughput, particularly in a preclinical setting. Further investigation into applications such as automated capacitor tuning and impedance matching for MR transceiver coils is warranted. |
| | |
Authors:
|
Steven G Turowski; Mukund Seshadri; Michael Loecher; Edward Podniesinski; Joseph A Spernyak; Richard V Mazurchuk |
Related Documents
:
|
19656823 - Low-frequency pulsed electromagnetic field exposure can alter neuroprocessing in humans. 20336173 - Synthesis and characterization of multifunctional silica core-shell nanocomposites with... 9627763 - Cardiac mr imaging in congenital heart disease. |
Publication Detail:
|
Type: Journal Article Date: 2007-09-10 |
Journal Detail:
|
Title: Magnetic resonance imaging Volume: 26 ISSN: 0730-725X ISO Abbreviation: Magn Reson Imaging Publication Date: 2008 Apr |
Date Detail:
|
Created Date: 2008-03-10 Completed Date: 2008-06-17 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 8214883 Medline TA: Magn Reson Imaging Country: United States |
Other Details:
|
Languages: eng Pagination: 426-32 Citation Subset: IM |
Affiliation:
|
Preclinical Imaging Resource, Roswell Park Cancer Institute, Buffalo, NY 14263, USA. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Animals Carcinoma, Non-Small-Cell Lung / pathology Ceramics Contrast Media Electric Power Supplies* Equipment Design Equipment Failure Analysis Female Gadolinium DTPA / diagnostic use Lung Neoplasms / pathology Magnetic Resonance Imaging / instrumentation* Mice Mice, Nude Phantoms, Imaging Transplantation, Heterologous |
| Chemical | |
Reg. No./Substance:
|
0/Ceramics; 0/Contrast Media; 80529-93-7/Gadolinium DTPA |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Whole-body MR angiography using variable density sampling and dual-injection bolus-chase acquisition...
Next Document: Expression of vesicular glutamate transporters 1 and 2 in the cells of origin of the rat thalamostri...