Advanced primary amelanotic malignant melanoma of the esophagus: A case report.

Background: Primary malignant melanoma of the esophagus accounts for 0.1%-0.2% of all esophageal malignancies, including melanotic and amelanotic melanomas.

[Chemical Exchange Saturation Transfer Imaging of Creatine Metabolites: a 3.0 T MRI Pilot].

Objective: To determine the feasibility of using chemical exchange saturation transfer (CEST) imaging to measure creatine (Cr) metabolites with 3.0 T MR.

Methods: Phantoms containing different concentrations of Cr under various pH conditions were studied with CEST sequence on 3.

MRI findings of choroid plexus tumors in the cerebellum.

Choroid plexus tumors (CPTs) are uncommon primary intracranial tumors. Here, we describe two patients with CPTs of the cerebellum: one had a choroid plexus papilloma located in the left cerebellar hemisphere that presented as an irregular, lobulated and solid-cystic mass, whereas the other had a choroid plexus carcinoma that exhibited a poorly defined, mixed-intensity mass associated with invasion of adjacent brain parenchyma. Contrast-enhanced MR imaging showed prominent heterogeneous enhancement.

Abnormal regional spontaneous neural activity in treatment-refractory depression revealed by resting-state fMRI.

Treatment-refractory depression (TRD) represents a large proportion of the depressive population, yet has seldom been investigated using advanced imaging techniques. To characterize brain dysfunction in TRD, we performed resting-state functional MRI (rs-fMRI) on 22 TRD patients, along with 26 matched healthy subjects and 22 patients who were depressed but not treatment-refractory (NDD) as comparison groups. Results were analyzed using a data-driven approach known as Regional Homogeneity (ReHo) analysis which measures the synchronization of spontaneous fMRI signal oscillations within spatially neighboring voxels.

[Microstructural abnormalities of basal ganglia and thalamus in children with first-episode Tourette's syndrome: a diffusion tensor imaging study].

Objective: To investigate the microstructural integrity of basal ganglia and thalamus in children with first episode drug-naive Tourette's syndrome (TS) by diffusion tensor imaging (DTI).

Methods: Ten right handed patients with TS (mean age = 8.1 +/- 2.

Magnetization transfer imaging reveals the brain deficit in patients with treatment-refractory depression.

Background: Studies on treatment resistant depression (TRD) using advanced magnetic resonance imaging techniques are very limited.

Methods: A group of 15 patients with clinically defined TRD and 15 matched healthy controls underwent magnetization transfer imaging (MTI) and T1-weighted (T1W) imaging. MTI data were processed and analyzed voxel-wised in SPM2.