NMR Even Echo Rephasing in Slow Laminar Flow

Waluch, V.; Bradley, William G.

doi:10.1097/00004728-198408000-00003

Cited by 134 publications

(30 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In fact, a later careful review of the initial set of images revealed clues that should have alerted the MRI specialist to the occurrence of artifacts: signal enhancement present in some phases of the cardiac cycle and absent in others ( Figure 2B), simultaneous presence of enhanced signal inside the left atrium and the descending aorta (Figure 2A). Four factors can influence the presence of an increased signal intensity by magnetic resonance: flow related enhancement 87 [8], even-echo rephasing [9], diastolic pseudogating [8,10] and coincidental phase cancellation [11]. Spinecho MR imaging is especially useful for the definition of anatomical cardiac details.…”

Section: Discussionmentioning

confidence: 99%

MRI misinterpretation of spontaneous echo-contrast as a large left atrial thrombus

Raggi¹,

Daniels

Shanoudy

et al. 1996

Int J Cardiac Imag

View full text Add to dashboard Cite

show abstract

Section: Discussionmentioning

confidence: 99%

MRI misinterpretation of spontaneous echo-contrast as a large left atrial thrombus

Raggi¹,

Daniels

Shanoudy

et al. 1996

Int J Cardiac Imag

View full text Add to dashboard Cite

show abstract

“…Slow-flowing blood may be diagnosed using a multiecho sequence where the intensity is greater on even echoes due to a rephasing phenomenon. 28 Thus the intensity of a venous angioma may be greater on the second echo image than on the first (Fig. 31).…”

Section: Vascular Abnormalitiesmentioning

confidence: 99%

Magnetic Resonance Imaging in the Central Nervous System: Comparison to Computed Tomography

BradleyJr.

1986

Ann Saudi Med

Self Cite

View full text Add to dashboard Cite

Magnetic resonance (MR) is a powerful new imaging modality which has recently become competitive with x-ray computed tomography (CT) for imaging of the central nervous system (CNS). The advantages of MR include lack of ionizing radiation and the necessity to use iodinated contrast. MR is able to provide images directly in the transaxial, coronal, and sagittal planes. When appropriate pulsing sequences are used, MR can be more sensitive than CT in the detection of early disease associated with increased water content. Included in this category are multiple sclerosis, early infarcts, small tumors, and inflammatory lesions. MR is superior to CT in the posterior and middle fossae due to the beam hardening artifacts which degrade the older modality. In the cord, MR is particularly useful in the evaluation of myelopathies, e.g., syringomyelia, spinal dysraphism, and intramedullary tumors.Due to its increased sensitivity in the detection of early disease, MR should generally be used as the initial screening procedure in the evaluation of suspected intracranial disease or disease of the cord. Current limitations of MR include: longer single slice imaging times, thicker slices, general lack of available contrast agents to define blood-brain barrier break-down, and the inability to image calcification and cortical bone. Patients on cardiac monitors or on respirators and those with intracranial aneurysm clips and cardiac pacemakers are currently excluded from MR imaging.

show abstract

“…1). These are electrocardiographically (ECG) gated spin-echo (SE) and fast gradient-recalled echo imaging (1)(2)(3)(4)(5)(6)(7)(8). This second approach is referred to by a variety of acronyms, which are different for each manufacturer of MR imaging systems.…”

Section: Basic Sequences For Cardiac Mrimentioning

confidence: 99%