Evaluation of brain and head and neck tumors with 4D contrast-enhanced MR angiography at 3T.

Fundamental and clinical studies of 4D contrast-enhanced MR Angiography for the evaluation of brain and neck lesions

Feasibility of non-contrast-enhanced four dimensional (4D) MRA in head and neck tumors, comparison with contrast-enhanced 4D MRA

BACKGROUND Information of tumor vascular architecture and hemodynamics is important in treating patients with head and neck tumors (HNTs). The purpose of this study is to investigate the feasibility of non-contrast-enhanced four-dimensional magnetic resonance angiography (non-CE 4DMRA) using arterial spin labeling for anatomical and hemodynamic evaluation of vascularity of head and neck tumors....

Dynamic Contrast Magnetic Resonance Imaging (DCE-MRI) and Diffusion Weighted MR Imaging (DWI) for Differentiation between Benign and Malignant Salivary Gland Tumors

Background: Salivary gland tumors form nearly 3% of head and neck tumors. Due to their large histological variety and vicinity to facial nerves, pre-operative diagnosis and differentiation of benign and malignant parotid tumors are a major challenge for radiologists. Objective: The majority of these tumors are benign; however, sometimes they tend to transform into a malignant form. Functional M...

Comprehensive Magnetic Resonance evaluation of vascular malformations at 3T: comparison of Time-resolved Angiography With Interleaved Stochastic Trajectories (TWIST) with standard 3D contrast enhanced MR Angiography (ceMRA)

(A) TWIST image in early arterial phase showing capillary lakes (arrow head). (B) TWIST image 2.2 sec after (A) showing development of tiny early draining veins (arrow). (C) Standard 3d ceMRA in the arterial phase demonstrating significant venous contamination without evidence of capillary shunting. Comprehensive Magnetic Resonance evaluation of vascular malformations at 3T: comparison of Time-...

Contrast-enhanced MR angiography at 3T in the evaluation of intracranial aneurysms: a comparison with time-of-flight MR angiography.

The combination of 3T and parallel-acquisition techniques holds promise for improved performance of contrast-enhanced MR angiography (MRA), in terms of speed, spatial resolution, and coverage. We present a comparison of 2 MRA techniques, including time-of-flight (TOF) and contrast-enhanced MRA, for detection and evaluation of intracranial aneurysms. Our results show that contrast-enhanced MRA w...