No abstract available.
Magnetic Resonance Imaging* ; Myelography*

A retrospective and cross sectional survey was carried out in 52 patients with cervical disc displacement who were screened by magnetic resonance at Viet Duc Hospital and Military Hospital 103 from Jan 2003 to Oct 2004. Sites of common displacement: C5-C6 (36.61%); C4-C5 (26.79%); C3-C4 (23.21%); C6-C7 (11.61%); C7-D1 (1.79%). Disc displacement in one layer was 42.31%, in two 11.54%, in three layers 34.61%, in four 11.54%, in centre 71.43%, beside centre 25%, in foramen 3.57%. Displacement image was looked clearly in T1W and T2W image. 100 displaced discs reduced signal in T2W image, 63.46% reduced disc height, 42.31% increased medulla signal equal with site of displacemen in T2W image
Magnetic Resonance Imaging ; Spine

The contrast substances have been used in the magnetic resonance imaging (MRI) to increase the sensitivity and specificity of diagnosis. It impacts on the density of proton and spin-spin time (T1 and T2). There were many different substances studied to increase the density of proton such as water, alcohol, hydrocarbon, and sugar or perfluoroctyl bromide. However, only paramagnetic compounds impacts on the spin-spin time were studied much and are being used.
Magnetic Resonance Imaging ; diagnosis

According to many years of MR experience for maintenance, Through careful observations artifacts, according to the easy first principle, use the process of elimination, first check the external environment to the interior of the machine, the layers of delivery in the cause of failure, eliminate the artifact.
Artifacts ; Magnetic Resonance Imaging

No abstract available.
Magnetic Resonance Imaging*

No abstract available.
Magnetic Resonance Imaging*

The use of both magnetic resonance imaging (MRI) and pacing devices has vastly increased worldwide in recent years. A significant number of implanted patients will likely need monitoring using magnetic resonance imaging (MRI) over the course of the lifetime of their device. Some studies have demonstrated that with appropriate precautions, MRI can be safely performed in patients with selected implantable pacemakers. However, MRI is still contraindicated in patients with pacemakers. Recently, new pacing systems have been specifically designed for safe use in the MRI environment. The first reported experience suggests that the technology is safe and may allow patients with these new pacemakers to undergo MRI. This review will describe the outstanding issues and controversies surrounding the safety of MRI in patients with pacemakers, and the potential benefits of the new MRI-conditional technology. We will also discuss how to decide whether an MRI-conditional system should be implanted, and highlight key issues that warrant further studies.
Humans ; Magnetic Resonance Imaging*

No abstract available.
Magnetic Resonance Imaging*

No abstract available.
Magnetic Resonance Imaging* ; Relaxation*

No abstract available.
Breast* ; Magnetic Resonance Imaging*