TY - JOUR
T1 - Reliable In-Plane Velocity Measurements With Magnetic Resonance Velocity Imaging
AU - Zhang, Haosen
AU - Halliburton, Sandra S.
AU - Venkatachari, Andan K.
AU - Setser, Randolph M.
AU - White, Richard D.
AU - Chatzimavroudis, George P
N1 - Zhang, H., Halliburton, S. S., Venkatachari, A. K., Setser, R. M., White, R. D., , & Chatzimavroudis, G. P. (2006). Reliable in-plane velocity measurements with magnetic resonance velocity imaging. Flow Measurement and Instrumentation, 17(2), 75-80. doi:10.1016/j.flowmeasinst.2005.11.003
PY - 2006/4/1
Y1 - 2006/4/1
N2 - Magnetic resonance (MR) imaging is a well-known diagnostic imaging modality. In addition to its high-quality imaging capabilities, hydrogen-based MR can also provide non-invasively the velocity of water-based fluids in all three spatial directions (through- plane and in- plane ) in an image. Many previous studies showed that MR velocity imaging can accurately measure the through- plane velocity . The aim of this study was to evaluate how reliable are the in- plane velocity measurements in an image. The axial velocity of water in horizontal tubes (inner diameter: 14.7–26.2 mm) was measured with segmented (fast) and non-segmented (slow) k-space MR velocity imaging using: (a) an imaging slice placed perpendicular to the tube axis with through- plane velocity -encoding; and (b) an imaging slice placed parallel to the tube axis with in- plane velocity -encoding. The two planes intersected along the vertical tube-centerline. The flow rate was accurately quantified (mean error plane velocity profiles were not significantly different from the through- plane profiles (mean difference =6%, correlation coefficients >0.98). There was no significant difference between the velocity profiles from the segmented and the non-segmented sequences (mean difference 0.95). The results of this study suggest that fast MR velocity imaging can measure the in- plane velocity in an image with reliability.
AB - Magnetic resonance (MR) imaging is a well-known diagnostic imaging modality. In addition to its high-quality imaging capabilities, hydrogen-based MR can also provide non-invasively the velocity of water-based fluids in all three spatial directions (through- plane and in- plane ) in an image. Many previous studies showed that MR velocity imaging can accurately measure the through- plane velocity . The aim of this study was to evaluate how reliable are the in- plane velocity measurements in an image. The axial velocity of water in horizontal tubes (inner diameter: 14.7–26.2 mm) was measured with segmented (fast) and non-segmented (slow) k-space MR velocity imaging using: (a) an imaging slice placed perpendicular to the tube axis with through- plane velocity -encoding; and (b) an imaging slice placed parallel to the tube axis with in- plane velocity -encoding. The two planes intersected along the vertical tube-centerline. The flow rate was accurately quantified (mean error plane velocity profiles were not significantly different from the through- plane profiles (mean difference =6%, correlation coefficients >0.98). There was no significant difference between the velocity profiles from the segmented and the non-segmented sequences (mean difference 0.95). The results of this study suggest that fast MR velocity imaging can measure the in- plane velocity in an image with reliability.
KW - Magnetic resonance imaging
KW - Magnetic resonance velocity mapping
KW - Flow quantification
KW - Velocity measurement
KW - In-plane velocity
KW - K-space segmentation
UR - https://engagedscholarship.csuohio.edu/encbe_facpub/74
U2 - 10.1016/j.flowmeasinst.2005.11.003
DO - 10.1016/j.flowmeasinst.2005.11.003
M3 - Article
VL - 17
JO - Flow Measurement and Instrumentation
JF - Flow Measurement and Instrumentation
ER -