Compensating for Field Strength with Coils; Comparison of SNR at 1.5T, 3T and 7T with 12 and 32 Channel Arrays

نویسندگان

  • M. Elschot
  • L. L. Wald
  • S. Biber
  • M. Hamm
  • C. Triantafyllou
چکیده

M. Elschot, L. L. Wald, S. Biber, M. Hamm, and C. Triantafyllou A.A. Martinos Center for Biomedical Imaging, Department of Radiology, MGH, Charlestown, MA, United States, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, Netherlands, Harvard-MIT Division of Health Science and Technology, Cambridge, MA, United States, Siemens HealthCare, Erlangen, Germany, Siemens Medical Solutions USA Inc., Charlestown, MA, United States, A.A. Martinos Imaging Center, McGovern Institute for Brain Research, MIT, Cambridge, MA, United States

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

SNR evaluation of 32 channel cardiac coils in DENSE MRI at 1.5 and 3T

Introduction: Myocardial strain assessment based on Displacement ENcoding with Stimulated Echoes (DENSE) MRI is a powerful tool to study myocardial function. Unfortunately, low SNR caused by T1 relaxation and excitation puts a limit on the number of cardiac phases that can be resolved. Several techniques to improve the SNR have been previously presented, with associated trade-offs. The regional...

متن کامل

High resolution MR imaging and spectroscopy of the human breast at 7T using a focused field RF coil setup

Introduction Contrast enhanced breast MRI has clinical relevance in cancer diagnoses and treatment monitoring, however at a limited specificity. Functional MRI techniques, like diffusion MRI and MR spectroscopy will contribute to improved specificity but compromised in sensitivity due to low spatial resolution. At 1.5T or 3T the improve of spatial is hindered by low signal to noise ratios even ...

متن کامل

Aortic 4D flow: quantifying the effects of contrast and field strength at 1.5 T, 3T and 7T

Background 4D flow is a promising new method for assessment of aortic pathology, but is limited by signal-to-noise ratio (SNR) leading to long acquisition times. Higher field strength may prove a solution. SNR in aortic 4D flow increases at 3T versus 1.5T (Strecker et al, JMRI 2012) and further by adding a contrast agent (Bock et al, MRM 2010). This work extends this comparison to human 7 Tesla...

متن کامل

Ultrashort Echo Time Imaging of Cortical Bone at 7 Tesla Field Strength

Introduction MRI at ultra-high field (UHF) strength of 7 Tesla has been increasingly used and optimized for in vivo applications over the past few years. In particular, the increased signal to noise ratio (SNR) renders this new modality very attractive for imaging soft tissues in the human body. More solid or semi-solid tissues such as trabecular and cortical bone provide little to no signal in...

متن کامل

In vivo triple-quantum (TQ) sodium MRI on the human brain: SNR benefits at 7T

INTRODUCTION Triple quantum (TQ) sodium imaging is an effective means decreasing the contribution from the intracellular and fluid spaces to the sodium (Na) signal. This increased intra-cellular contrast is highly desirable for the study of pathologies such as cancer and stroke. The sodium TQ signal is, however, much weaker than the single quantum (SQ, or total tissue) signal (~1/10). It is, th...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2008