Solitary plasmacytoma of the sacrum. Radiologic findings of three cases.

We report the radiologic findings from three cases of solitary plasmacytoma (SP) of the sacrum. Common findings included lytic changes on computed tomography (CT) and relatively low signal intensity on T2-weighted magnetic resonance (MR) images, with intense enhancement after contrast administration. All cases showed infiltrating and slightly expansive growth, but the sacral structure was generally maintained.

Multislice continuous arterial spin-labeled perfusion MRI in patients with chronic occlusive cerebrovascular disease: a correlative study with CO2 PET validation.

Purpose: To compare the use of multislice continuous arterial spin labeling (CASL) and CO(2) positron emission tomography (PET) to assess CBF in patients with chronic occlusive cerebrovascular disease for the validation of quantitative CASL perfusion in an altered hemodynamic state.

Materials And Methods: Eleven patients with occlusive carotid artery disease were studied with CASL and conventional MRI. Cerebral blood flow (CBF) was also measured with O(15)-labeled CO(2) gas using a whole-body PET scanner.

Measurement of the vascularity and vascular leakage of gliomas by double-echo dynamic magnetic resonance imaging: a preliminary study.

Rationale And Objective: To evaluate the vascularity and vascular leakage of well-enhanced gliomas by double-echo dynamic magnetic resonance (MR) imaging.

Materials And Methods: Eight patients with glioblastoma multiforme (GBM) and two patients with juvenile pilocytic astrocytoma (JPA) were studied. Double-echo dynamic MR imaging was utilized to separate the T2* shortening effect and the T1 shortening effect.