Measuring tongue motion from tagged cine-MRI using harmonic phase (HARP) processing

2007 ◽  
Vol 121 (1) ◽  
pp. 491-504 ◽  
Author(s):  
Vijay Parthasarathy ◽  
Jerry L. Prince ◽  
Maureen Stone ◽  
Emi Z. Murano ◽  
Moriel NessAiver
Keyword(s):  
Cine Mri ◽  
Harmonic Phase ◽  
Tongue Motion

Single syllable tongue motion analysis using tagged cine MRI

2012 ◽  
Vol 17 (8) ◽  
pp. 853-864 ◽  
Author(s):  
Devrim Unay ◽  
Cengizhan Ozturk ◽  
Maureen Stone
Keyword(s):  
Motion Analysis ◽  
Cine Mri ◽  
Tongue Motion

scholarly journals Analysis of 3-D Tongue Motion From Tagged and Cine Magnetic Resonance Images

2016 ◽  
Vol 59 (3) ◽  
pp. 468-479 ◽  
Author(s):  
Fangxu Xing ◽  
Jonghye Woo ◽  
Junghoon Lee ◽  
Emi Z. Murano ◽  
Maureen Stone ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Vocal Tract ◽  
Estimation Algorithm ◽  
Magnetic Resonance Images ◽  
Control Group ◽  
Motion Patterns ◽  
Random Walker ◽  
3 Dimensional ◽  
Harmonic Phase ◽  
Tongue Motion

Purpose Measuring tongue deformation and internal muscle motion during speech has been a challenging task because the tongue deforms in 3 dimensions, contains interdigitated muscles, and is largely hidden within the vocal tract. In this article, a new method is proposed to analyze tagged and cine magnetic resonance images of the tongue during speech in order to estimate 3-dimensional tissue displacement and deformation over time. Method The method involves computing 2-dimensional motion components using a standard tag-processing method called harmonic phase, constructing superresolution tongue volumes using cine magnetic resonance images, segmenting the tongue region using a random-walker algorithm, and estimating 3-dimensional tongue motion using an incompressible deformation estimation algorithm. Results Evaluation of the method is presented with a control group and a group of people who had received a glossectomy carrying out a speech task. A 2-step principal-components analysis is then used to reveal the unique motion patterns of the subjects. Azimuth motion angles and motion on the mirrored hemi-tongues are analyzed. Conclusion Tests of the method with a various collection of subjects show its capability of capturing patient motion patterns and indicate its potential value in future speech studies.

scholarly journals Analysis of speech and tongue motion in normal and post-glossectomy speaker using cine MRI

2016 ◽  
Vol 24 (5) ◽  
pp. 472-480 ◽  
Author(s):  
Jinhee Ha ◽  
Iel-yong Sung ◽  
Jang-ho Son ◽  
Maureen Stone ◽  
Robert Ord ◽  
...  
Keyword(s):  
Cine Mri ◽  
Tongue Motion

scholarly journals Circulation derived from 4D flow MRI correlates with right ventricular dysfunction in patients with tetralogy of Fallot

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Nanae Tsuchiya ◽  
Michinobu Nagao ◽  
Yumi Shiina ◽  
Shohei Miyazaki ◽  
Kei Inai ◽  
...  
Keyword(s):  
Right Ventricular ◽  
Tetralogy Of Fallot ◽  
Main Pulmonary Artery ◽  
Vortex Formation ◽  
Cine Mri ◽  
Short Axis ◽  
4D Flow Mri ◽  
4D Flow ◽  
Flow Mri ◽  
Rv Function

AbstractWe used 4D-flow MRI to investigate circulation, an area integral of vorticity, in the main pulmonary artery (MPA) as a new hemodynamic parameter for assessing patients with a repaired Tetralogy of Fallot (TOF). We evaluated the relationship between circulation, right ventricular (RV) function and the pulmonary regurgitant fraction (PRF). Twenty patients with a repaired TOF underwent cardiac MRI. Flow-sensitive 3D-gradient sequences were used to obtain 4D-flow images. Vortex formation in the MPA was visualized, with short-axis and longitudinal vorticities calculated by software specialized for 4D flow. The RV indexed end-diastolic/end-systolic volumes (RVEDVi/RVESVi) and RV ejection fraction (RVEF) were measured by cine MRI. The PR fraction (PRF) and MPA area were measured by 2D phase-contrast MRI. Spearman ρ values were determined to assess the relationships between circulation, RV function, and PRF. Vortex formation in the MPA occurred in 15 of 20 patients (75%). The longitudinal circulation (11.7 ± 5.1 m2/s) was correlated with the RVEF (ρ = − 0.85, p = 0.0002), RVEDVi (ρ = 0.62, p = 0.03), and RVESVi (ρ = 0.76, p = 0.003) after adjusting for the MPA size. The short-axis circulation (9.4 ± 3.4 m2/s) in the proximal MPA was positively correlated with the MPA area (ρ = 0.61, p = 0.004). The relationships between the PRF and circulation or RV function were not significant. Increased longitudinal circulation in the MPA, as demonstrated by circulation analysis using 4D flow MRI, was related to RV dysfunction in patients with a repaired TOF.

scholarly journals Evaluation of cerebrospinal fluid flow dynamic changes in patients with idiopathic intracranial hypertension using phase contrast cine MR imaging

2020 ◽  
Vol 56 (1) ◽  
Author(s):  
Tamer Belal ◽  
Abd-Elhalim Al Tantawy ◽  
Fatema Mohamed Sherif ◽  
Alshaimaa Ramadan
Keyword(s):  
Cerebrospinal Fluid ◽  
Medical Treatment ◽  
Intracranial Hypertension ◽  
Idiopathic Intracranial Hypertension ◽  
Phase Contrast ◽  
Cine Mri ◽  
Mean Flow ◽  
Csf Flow ◽  
Flow Dynamic ◽  
Dynamic Changes

Abstract Background Idiopathic intracranial hypertension (IIH) mainly affects overweight women in the middle age period. The pathophysiology of IIH stays unclear, but suggested mechanisms include excess CSF production, reduced CSF absorption, increased brain water content, and increased cerebral venous pressure Objectives To assess the cerebrospinal fluid (CSF) flow dynamic changes in aqueduct of Sylvius in patients of idiopathic intracranial hypertension (IIH) with new MRI technique: phase contrast cine MRI (PCC-MRI). Methods Thirty patients diagnosed with idiopathic intracranial hypertension were divided into 3 groups according to treatment options (no treatment, medical treatment, and medical treatment with repeated lumbar tapping). CSF flow data were evaluated by phase contrast cine MRI. Results PCC-MRI parameters were significantly higher in group who was on medical treatment (group II) than other groups. The sensitivity of PCC MRI parameters ranged from 56.7 (stroke volume (SV) and mean flow (MF)) to 83.3% (peak systolic velocity (PSV)). A statistically significant difference was found for the mean flow value (p 0.039) between the control group and IIH patients. Conclusion The most specific CSF flowmetry parameter detected to help diagnosis of IIH is mean flow especially among early discovered patients. PCC MRI can be used as non-invasive technique for diagnosis of IIH and treatment follow-up.

scholarly journals Dissociating harmonic and non-harmonic phase-amplitude coupling in the human brain

NeuroImage ◽  
2021 ◽  
Vol 227 ◽  
pp. 117648
Author(s):  
Janet Giehl ◽  
Nima Noury ◽  
Markus Siegel
Keyword(s):  
Human Brain ◽  
Harmonic Phase ◽  
Phase Amplitude

PO-1613: Reliability of ITV approach to varying treatment fraction time: considerations based on 2D cine MRI

2020 ◽  
Vol 152 ◽  
pp. S878-S879
Author(s):  
D. Cusumano ◽  
J. Dhont ◽  
L. Boldrini ◽  
S. Longo ◽  
G. Chiloiro ◽  
...  
Keyword(s):  
Cine Mri
Sign in / Sign up

Export Citation Format

Share Document