flow void

flow void

1. in MRI, absence of signal from blood whose activated protons leave a bodily area before the magnetization is measured.
See also: signal void.
2. In MRI, any loss of signal caused by combined turbulence and intravoxel dephasing.
References in periodicals archive ?
1) Efforts to visualise the patency of a third ventriculostomy begin with the detection of a flow void in the floor of the third ventricle on T2-weighted MR images and later confirmation with the use of cine 2-dimensional (2D) phase-contrast (PC) MR images.
6) On MRI, the varix appears as a dilated, serpiginous flow void in the epidural space.
Invoice factoring with Riviera Finance fills the cash flow void, providing clients with cash upon delivery of product or service and full accounts receivable management.
It may show the absence of flow void in the normal venous channels.
T2-weighted images show high-signal change involving the white matter with absent flow void in the related cortical vein or dural venous sinus.
A flow void originating from the right PICA was present on midline sagittal T1-weighted images (Figure 2).
Paragangliomas typically show isointense signal to skeletal structures; dark signal areas represent flow voids on T1-weighted MRI (salt-and-pepper appearance).
The most common micro-bleed mimics seen on MRI include mineral deposits, flow voids, bone/air artifacts, cavernous malformations, metastatic melanoma, and diffuse axonal injury.
It could be that landlords, faced with the risk of vacant property, cash flow voids, rates liability if furnished and difficulties in servicing their borrowing, may feel the time is right to take advantage of current property prices and sell into the owner-occupier market.
Lack of flow voids and calcifications helps to differentiate the condition from vascular malformations of Klippel-Trenauney-Weber syndrome.
Magnetic resonance imaging revealed a large, well-circumscribed, lobulated mass with multiple vascular flow voids at the center (sunray/spoke-wheel pattern).
Flow voids were appreciated within the proximal portion.