[Investigation of Changing Imaging Contrast Using Compressed Sensing in Gd-EOB-DTPA Hepatocyte Phase].

In recent years, gadolinium ethoxybenzyl diethylenetriamine pantaacetic acid (Gd-EOB-DTPA) has been commonly used in magnetic resonance imaging (MRI) for liver contrast studies. The purpose of this study was to investigate the effect of Hyper SENSE factor on contrast in the Gd-EOB-DTPA hepatocyte phase. The subjects were 21 patients [16 males and 5 females, aged 50-94 years (mean age 68±12years)] who underwent hepatic contrast-enhanced MRI with Gd-EOB-DTPA from March 2021 to December 2021.

[Optimization of T-weighted Imaging Parameters in MR Carotid Plaque Imaging: Influence for the Quantitative Evaluation among Different MRI Scanner Types].

Carotid artery plaques with high-signal intensity on T weighted image (T WI) are known to cause cerebral ischemic disease. Signal intensity ratio (SIR), which is calculated from T WI in the quantitative evaluation of plaque characterization have been used. However, the various sequences in T WI and difference in the sequences were utilized among institutions.

[Usefulness of short inversion time inversion recovery-low B diffusion weighted imaging after pouring in gadolinium- ethoxybenzyl-diethylene-triaminepentaacetic acid].

Diffusion weighted imaging (DWI) using a low b value for examination of the body is not common, so we examined its usefulness. Phantom experiments were performed in which I changed the length of the echo time (TE), with and without short inversion time inversion recovery (STIR). The signal intensity of each phantom was reduced by using a longer TE or by combination with STIR, but contrast was improved.

[Imaging characteristics of two-dimensional spin echo T₁-weighted image in carotid artery plaque].

Recently, T₁ weighted image (T₁WI) has proven to be useful for diagnosing carotid plaque. This time, the image parameter of two-dimensional spin echo (2D SE) T₁WI was examined. Phantoms that imitated muscle and carotid plaque were made.

[A study of ADC value in PROPELLER DWI].

Diffusion weighted imaging(DWI)is rapidly becoming widespread in MRI, with many reports of the differential diagnosis using the Apparent Diffusion Coefficient(ADC)being seen. We examined the influence of scan parameter on ADC in PROPELLER-DWI. Neither the TR nor T1 value had a major influence on the ADC value.

[Influence of the difference in start-up echo on signal intensity in the FIESTA sequence].

The FIESTA sequence is a fast imaging method used for various parts in recent years. A constant flip angle (CFA) or linear flip angle (LFA) are used as the start-up echo in many cases. It is reported from CFA, which is the conventional method, that the T1 value and T2 value influence the speed that reaches steady state.