Methods: In vivo T2-weighted (T2W) MRI examinations (4.7 T) were performed on Golden Syrian hamsters (GSH) intracerebrally, orally, or intraperitoneally (i.p.) infected with the 263K scrapie strain. Histopathological analyses were performed on i.p. infected GSH at the end of one-day or ...
To evaluate the T2 signal intensity (SI) of axillary lymph nodes as a potential functional imaging marker for metastasis in patients with mucinous breast cancer. METHODS. A retrospective review of breast MRIs performed from April 2008 to March 2024 was conducted to identify patients with mucinous ...
- 1990 - 64 - www.sciencedirect.comdoi:10.1016/0006-3223(90)90129-PELSEVIERBiological Psychiatry
(MS).Compare the T2 signal intensity of intracranial deep gray matter nuclei before and after treatment of glucocorticoid.Methods According to the Mc Donald 2010 diagnostic criteria,we collected 17 patients with MS and 17 controls,who were the same gender and age.Both groups received M...
the M0 based on highest signal intensity ("A")maxval=max(vec1);beta0_1(2)=maxval(1);% beta 3 is B, ideally should be approximately 2*Mobeta0_1(3)=beta0_1(2)*2;beta_1=fminsearch('sse_fun_PS',beta0_1,OPTIONS,TI,vec1');[SSE_1,RSQ_1,SSR_1,SST_1]=getMSE(@T1_fun3_PS...
Purpose: To evaluate T2 , T2*, and signal-to-noise ratio (SNR) for hyperpolarized helium-3 ((3) He) MRI of the human lung at three magnetic field strengths ranging from 0.43T to 1.5T. Methods: Sixteen healthy volunteers were imaged using a commercial whole body scanner at 0.43T, 0.79...
We could not find any trauma related changes of cervical disc signal intensities. Normalized signals of discs and Pfirrmann grading changed with age and varied between disc levels with the used MR sequence. 展开 关键词: Cervical spine MRI Disc signal Whiplash patients Disc degeneration Trauma ...
aMagnetic resonance imaging (MRI) and spectroscopy (MRS) studies of micron-scale samples such as living cells or cell clusters require application of very small radiofrequency (RF) coils that provide high signal-to-noise ratio (SNR). Additionally, any quantification measurements, such as T1 or ...
In addition, CBV measurement errors with bolus MRI were significantly larger than those observed with infusion MRI or by CT. The reasons that the constants differ from 1 and for the larger variance of bolus MRI are discussed in terms of the T2* signal mechanisms. These studies help define ...
aThese tumors are hypointense to muscle on T1W images, with variable signal intensity on T2W images depending on proportions of cellular versus fibrous components (Fig. 135-6).11 Variable enhancement occurs after contrast agent administration. Infiltrative margins are evident. MRI is useful to dete...