Magnetic resonance imaging criteria for distinguishing between inclusion body myositis and polymyositis.

Objective: To develop diagnostic imaging criteria for polymyositis (PM) and sporadic inclusion body myositis (sIBM).

Methods: We investigated 220 patients with suspected inflammatory myopathies by magnetic resonance imaging (MRI). Findings were compared with the results of clinical and biological examinations and muscle biopsy.

Liver metastases: safety and efficacy of detection with superparamagnetic iron oxide in MR imaging.

Purpose: To evaluate the clinical and biologic safety of superparamagnetic iron oxide (SPIO) as a contrast agent in magnetic resonance (MR) imaging and to assess its efficacy in the detection of liver metastases.

Materials And Methods: Twenty adults with liver metastases underwent MR imaging at 1.5 T before and 1 hour after infusion of SPIO.

[MRI techniques applied to the diagnosis of hepatic tumors].

We know that the contrast of MR images can be better than that of CT scans. In the spin echo mode, sequences with long TR and long TE provide great contrast, while, conversely, sequences with short TR and TE produce images with a greater anatomical fidelity. This dual performance, a notion that had never been expressed as explicitly in imaging, has led to distinguishing between the roles of MRI for detection and tissue characterization (diagnosis and nature).

Gd-DOTA: evaluation of its renal tolerance in patients with chronic renal failure.

Gd-DOTA is an intravenous contrast medium used in MRI. The clinical and biological tolerance of Gd-DOTA was studied in patients with chronic renal failure (e.g.

MRI of liver tumors using gadolinium-DOTA: prospective study comparing spin-echo long TR-te sequence and CT.

Thirty-nine patients with liver tumors were examined using MRI at 0.5 T before and after intravenous bolus injection of either 0.1 mmol/kg (n = 18) or 0.

[Comparative study of MRI and CT x-ray in evaluating the extension of kidney cancer in adults].

The assessment of the extent of kidney cancers with MRI and CT is compared in 40 patients. The appearance of the tumor with MRI is very variable but always heterogeneous. Specific MRI features (tumoral pseudocapsule) provide a higher overall reliability (OR) than with CT for the detection of expansion beyond the capsule and into the kidney: 80% for 60%.