PURPOSE To describe fat-suppression failure artifacts and to caution against their misinterpretation. METHOD Magnetic-susceptibility artifacts were studied in a phantom model and the results were compared to MR images obtained in clinical cases. FINDINGS Artifacts manifested themselves as regions of focal fat-suppression failure and appeared as bright signals without geometric distortions a...

PURPOSE Unwanted, bright fat signals in balanced steady-state free precession sequences are commonly suppressed using spectral shaping. Here, a new spectral-shaping method is proposed to significantly improve the uniformity of stopband suppression without compromising the level of passband signals. METHODS The proposed method combines binomial-pattern excitation pulses with a wideband balance...

PURPOSE To assess electrocardiographically gated spin-echo (SE) and double inversion-recovery fast SE magnetic resonance (MR) imaging in the depiction of intramyocardial fat in cadaveric heart specimens and patients with arrhythmogenic right ventricular dysplasia (ARVD). MATERIALS AND METHODS A phantom was used to determine the effective in-plane spatial resolution of SE and fast SE MR imagin...

We have devised a modified Dixon method for analyzing fatty infiltration of the liver using a dual doublegradient-echo (DDGRE) sequence. To correct the T2* decay, fourfold echo images were obtained by out-of-phase (TE = 2.3/6.9 ms) and in-phase (4.6/9.2 ms) double-echo sets during a single breath-hold scan on a 1.5 T MRI. The liver fat fractions obtained using the DDGRE method were determined i...

PURPOSE To characterize the effect of fat on modified Look-Locker inversion recovery (MOLLI) T1 maps of the liver. The balanced steady-state free precession (bSSFP) sequence causes water and fat signals to have opposite phase when repetition time (TR) = 2.3 msec at 3T. In voxels that contain both fat and water, the MOLLI T1 measurement is influenced by the choice of TR. MATERIALS AND METHODS ...

The proportion of fat content in the body is important classification and grading disease. In a clinical situation, image characteristics adipose tissue are used as information diagnosing Therefore, imaging on ultrasound images should be understood comprehensive manner. this study, we describe using phantoms representing three different fractions. fractions were 0%, 40%, 80%, consisted agarose ...

Institutional review board approval and informed consent were obtained for this HIPAA-compliant study. The purpose was to prospectively compare multiecho iterative decomposition of water and fat with echo asymmetry and least-squares estimation (IDEAL) gradient-echo (GRE) magnetic resonance (MR) imaging with three-dimensional fat-suppressed (FS) spoiled GRE (SPGR) MR imaging to evaluate the arti...

BACKGROUND Body electrical loss analysis (BELA) is a new non-invasive way to assess visceral fat depot size through the use of electromagnetism. BELA has worked well in phantom measurements, but the technology is not yet fully validated. METHODS Ten volunteers (5 men and 5 women, age: 22-60 y, BMI: 21-30 kg/m(2), waist circumference: 73-108 cm) were measured with the BELA instrument and with ...

PURPOSE This study was performed to investigate the accuracies of the synthesized monochromatic images and effective atomic number maps obtained with the new GE Discovery CT750 HD CT scanner. METHODS A Gammex-RMI model 467 tissue characterization phantom and the CT number linearity section of a Phantom Laboratory Catphan 600 phantom were scanned using the dual energy (DE) feature on the GE CT...

Purpose Chemical shift‐encoded MRI (CSE‐MRI) is well‐established to quantify proton density fat fraction (PDFF) as a quantitative biomarker of hepatic steatosis. However, temperature known bias PDFF estimation in phantom studies. In this study, strategies were developed and evaluated correct for the effects on through simulations, temperature‐controlled experiments, multi‐center, multi‐vendor s...