Dynamic perfusion CT in brain tumors

Direct Comparison of Dynamic Susceptibility Weighted MR Perfusion with CT Perfusion in Brain Tumors

Introduction: Contrast Agents (CAs) are widely used as indicators to study quantitative perfusion and Blood Brain Barrier (BBB) permeability in MRI, and are useful in characterizing pathology [1]. A common assumption is that the relationship between longitudinal relaxation rate change and Gd concentration is linear. In general, this assumption depends on the size of the molecules to which the G...

Perfusion CT imaging of brain tumors: an overview.

Perfusion imaging of brain tumors has been performed by using various tracer and nontracer modalities and can provide additional physiologic and hemodynamic information, which is not available with routine morphologic imaging. Tumor vascular perfusion parameters obtained by using CT or MR perfusion have been used for tumor grading, prognosis, and treatment response in addition to differentiatin...

CT-guided laser probe for ablation of brain tumors

In this study, 22 patients (15-75 years old) were selected and transferred to CT scan for tumor ablation. For ablations, after prep and drep under the local anesthesia and mild sedation in proper position, small incision made and special needle inserted and guided by proper direction to the core of the tumor. Then, laser probe inserted through the needle and laser energy delivered. Although we ...

Dynamic susceptibility contrast-enhanced perfusion MR Imaging of Brain Tumors

Dynamic magnetic resonance perfusion imaging of brain tumors.

In this paper, we review the technique of contrast-enhanced magnetic resonance (MR) perfusion imaging of brain neoplasms, with an emphasis on its clinical applications and utility. We start with a discussion of MR perfusion techniques available today and their relative merits and shortcomings. Next, the ability of MR perfusion to provide a preoperative assessment of tumor histology is examined....