[Correlation between age and average apparent diffusion coefficient in normal-appearing cerebral white matter].

Objective: To quantitatively study the effect of ages on the average apparent diffusion coefficient (ADCav) of normal-appearing white matter.

Methods: Fifty patients with normal-appearing white matter were divided into four age groups, namely 16-30 years, (n=13), 31-45 years (n=12), 46-60 years (n=14) and >60 years (n=11). All the subjects were examined with conventional and trace-weighted diffusion imaging in three orthogonal directions.

Perfusion homogeneity of hepatic parenchyma in magnetic resonance imaging during splenoportography.

Objective: To evaluate the homogeneity of hepatic parenchyma enhancement in magnetic resonance imaging during splenoportography (MRSP) in the portal phase.

Methods: MRSP was performed in 16 patients suspected of space-occupying lesions in the livers. The signal intensity of non-lesion abnormal perfusion areas and that of peripheral parenchyma were measured in all the scanning phases including unenhanced phase, portographic phase, equilibrium phase, and delayed phase.

[Comparative study of four GRE sequences in MnDPDP-enhanced magnetic resonance imaging for primary hepatocellular carcinoma].

Objective: To assess the value of four T(1)-weighted (T(1)W) gradient-recalled-echo (GRE) sequences in MnDPDP-enhanced magnetic resonance imaging (MRI) for diagnosing primary hepatocellular carcinoma (HCC).

Methods: T(1)W images of fast low-angle shot (FLASH), fat-suppressed (FS) FLASH, in-phase and opposed-phase (IP/OP) FLASH were obtained from 13 HCC patients before and 30 min after the patients were given 5 micromol/kg.b.

Superparamagnetic iron oxide (Feridex)-enhanced MRI in diagnosis of focal hepatic lesions.

Objective: To evaluate the diagnostic value of superparamagnetic iron oxide (SPIO)-enhanced magnetic resonance imaging (MRI) for hepatic focal solid lesions.

Methods: SPIO (Feridex)-enhanced MRI examination was performed in 28 cases of hepatic space-occupying lesions defined by CT or MRI or other methods. In post-contrast enhanced examination, the signal intensity and contrast-to-noise ratio (CNR) were measured in lesions and normal hepatic parenchyma in T2-weighted images (T2WI) and were compared with those in pre-contrast enhanced MRI.

[Role of magnetic resonance imaging in the diagnosis of intracranial germinoma].

Objective: To investigate the value of magnetic resonance imaging (MRI) in the diagnosis of intracranial germinoma.

Methods: A retrospective analysis of the MRI features was conducted in 19 cases of pathologically confirmed intracranial germinoma.

Results: The lesion was located in the sellar region in 10 cases, in the pineal region in 6 and in the thalamus and basal ganglia in 3.

Animal experiments and clinical application of CT during percutaneous splenoportography.

AIM:To introduce computed tomography during percutaneous splenoportography (CTSP), a new method for determining hepatic diseases.METHODS:Ten hybrid dogs and 20 patients with primary hepatic cancer (PHC) were included in the study. Each dog was examined by CT, CTAP (computed tomography during arterial portography) and CTSP to compare the enhanced degrees of the liver.