A multi-slot surface coil for MRI of dual-rat imaging at 4T

Journal Article · Fri Jul 01 04:00:00 EDT 2011 · Physics in Medicine and Biology

DOI:https://doi.org/10.1088/0031-9155/56/12/007· OSTI ID:1040461

Solis, S E; Tomasi, D; Solis, S E; Wang, R; Tomasi, D; Rodriguez, A O

A slotted surface coil inspired by the hole-and-slot cavity magnetron was developed for magnetic resonance imaging of obese rats at 4 T. Full-wave analysis of the magnetic field was carried out at 170 MHz for both the slotted and circular-shaped coils. The noise figure values of two coils were investigated via the numerical calculation of the quality factors. Fat simulated phantoms to mimic overweight rats were included in the analysis with weights ranging from 300 to 900 g. The noise figures were 1.2 dB for the slotted coil and 2.4 dB for the circular coil when loaded with 600 g of simulated phantom. A slotted surface coil with eight circular slots and a circular coil with similar dimensions were built and operated in the transceiver mode, and their performances were experimentally compared. The imaging tests in phantoms demonstrated that the slotted surface coil has a deeper RF-sensitivity and better field uniformity than the single-loop RF-coil. High quality images of two overweight Zucker rats were acquired simultaneously with the slotted surface coil using standard spin-echo pulse sequences. Experimental results showed that the slotted surface coil outperformed the circular coil for imaging considerably overweight rats. Thus, the slotted surface coil can be a good tool for MRI experiments in rats on a human whole-body 4 T scanner.

• Research Organization: BROOKHAVEN NATIONAL LABORATORY (BNL)
• Sponsoring Organization: USDOE SC OFFICE OF SCIENCE (SC)
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 1040461
• Report Number(s): BNL--96119-2011-JA; KP1602010
• Journal Information: Physics in Medicine and Biology, Journal Name: Physics in Medicine and Biology Journal Issue: 12 Vol. 56; ISSN 0031-9155; ISSN PHMBA7
• Country of Publication: United States
• Language: English

Related Subjects

62 RADIOLOGY AND NUCLEAR MEDICINE
BODY COMPOSITION
MAGNETIC FIELDS
MAGNETIC RESONANCE
MAGNETRONS
MRI (Magnetic Resonance Imaging)
NMR IMAGING
PHANTOMS
QUALITY FACTOR
RATS
SPIN ECHO
WEIGHT
coil
magnetron
rats