In addition, annular tear was identified on the T2 weighted image based on the change in the signal of the posterior annulus fibrosus, and the high intensity zone (HIZ) was defi ned as the local ...

an analysis of T2‑weighted magnetic resonance imaging in 5843 ... which is composed of annulus brosus, nucleus pulposus and cartilaginous end plate. The nucleus ... disc signal intensity to mean CSF signal intensity and was calculated using the following formula: [(mean disc signal ...

The signal intensity was correlated with the percentage of disc protrusion reduction (p = 0.048). The percentage of disc protrusion reduction correlated with the last follow-up ODI (p = 0.018). Conclusion: One year after TELD, annulus remodeling was observed with an average of 67.7% of size reduction. The high signal intensity of residual mass ...

Caseous calcification of the mitral annulus (CCMA) is a rare variant of mitral annular calcification (MAC). ... (Ultrasound, Computed tomography, Cardiac Magnetic resonance) to assess this unusual cardiac mass. ... CCMA appears as a mass devoid of a central signal but with a ring of high intensity compared with the surrounding …

Purpose The study aimed to observe cervical intervertebral discs (IVDs) in asymptomatic subjects and to explore the factors associated with cervical intervertebral disc degeneration (IVDD). Methods Cervical spine MRI of 5843 subjects was retrospectively analyzed. On the sagittal T2-weighted MR images, the mean signal intensities of the …

However, with increasing the intensity of the magnetic field, the total entropy generation and Bejan number increase. Also, with increasing the length of the thermal source, the total entropy ...

Heat transfer enhancement using an external magnetic field with a high level of energy economy is a promising subject. The permanent magnets with no additional electrical power consumption are adopted to produce the applied magnetic fields. The effects of the magnet assembly and magnet strength on the thermomagnetic …

High-intensity zone is an area of high-intensity signal within the posterior annulus fibrosus observed in magnetic resonance imaging; initially described in painful discs, recent studies have described similar prevalence in symptomatic and asymptomatic subjects. Since its' prevalence in the general …

The high-intensity zone (HIZ) is the bright white signal in the posterior annulus on T2 weighted MR images and is thought to be a radial tear in the posterior annulus of the disc. Some studies have reported that the HIZ was a reliable marker of IDD, while others disagreed 8-13. However, many physicians make a hasty diagnosis of IDD …

High intensity zones (HIZs), originally defined as a bright white signal in the posterior annulus fibrosus (AF) on T2 weighted (T2W) MRI are thought to be pathognomonic of a symptomatic IVD (Fig. 1). However, literature regarding HIZ and its predictive value as the cause of discogenic LBP remains controversial.

The significance of high intensity zone (HIZ) in posterior annulus as visualized in T2 weighted magnetic resonance imaging (MRI) in patients with chronic low back pain is being actively discussed and evolving in the literature. 1 – 6 The majority of the recent literature supports the significance of HIZ in patients with chronic low back pain ...

intensity and magnetic field of a sunspot, and the solid line is a second-degree polynomial. that best fits the data: I ( B) =I0−b|B|+cB2,(1) where I (B) is the intensity as a function of ...

a Sagittal T2-weighted magnetic resonance image (MRI) showing a high-intensity zone (arrow) within the posterior annulus at L4-L5. b Axial T2-weighted magnetic resonance image (MRI) shows a high …

The angle of inclination and the radii ratio of the annulus have a significant effect on the stabilization of the magneto-convective flux and show that the best stabilization of the natural oscillatory convection is obtained by the intensity of the strongest magnetic field, the high radii ratio and inclination of the annulus at g = 30°.

High-intensity zone (HIZ) was originally described as a high-intensity signal on T2-weighted magnetic resonance (MR) images, located in the posterior annulus fibrosus, clearly separated from the nucleus pulposus. Among symptomatic patients with low back pain, HIZ is present in 28-59% of cases. In mo …

We study the dynamics and pattern formation of a ferrofluid annulus enveloped by two nonmagnetic fluids in a Hele-Shaw cell, subjected to an in-plane crossed magnetic field configuration involving ...

The best stability of the oscillatory convection is obtained for strong magnetic field intensity, high radius ratio and at the inclination of 30° for annulus. 5. ... Multi-objective optimization of natural convection in a cylindrical annulus mold under magnetic field using particle swarm algorithm. Int Commun Heat Mass Tran, 60 (2015), ...

Furthermore, stream function increases with the inclination angle. The best stability of the oscillatory convection is obtained for strong magnetic field intensity, high …

The high intensity zone (HIZ) was first described by Aprill and Bogduk on lumbar spine magnetic resonance imaging (MRI) studies in 1992. Correlation with lumbar computed tomography (CT) discography showed that the HIZ represents a deep radial tear of the annulus fibrosus, which may be a cause of chronic low back pain.

High-intensity zones (HIZs) are one such lumbar phenotype and are characterized as high-intensity regions of the annulus fibrosus of the intervertebral disc noted on T2-weighted MRI ... Schellhas KP, Pollei SR, Gundry CR, et al. Lumbar disc high-intensity zone: correlation of magnetic resonance imaging and discography. Spine. …

The magnetic field strength ranges from approximately 25 to 65 microteslas (0.25 to 0.65 G; by comparison, a strong refrigerator magnet has a field of about 100 G). The intensity of the field is greatest near the poles and weaker near the equator.

magnetic field intensity vector. H. ... and outer walls along the annulus for different nanoparticles volume fractions in the presence of the negative gradient magnetic field. At the annulus inlet, due to the high velocity gradient, the friction coefficient has a maximum value. In the absence of the external magnetic field, the friction ...

Study design: Experimental correlation study design to quantify features of disc health, including signal intensity and distinction between the annulus fibrosus and nucleus pulposus, with T2* magnetic resonance imaging (MRI) and correlate with the functional mechanics in corresponding motion segments. Objective: Establish the …

High-intensity zones (HIZ) are linear or globular areas of high signal seen on T2-weighted (T2 W) images in the posterior annulus fibrosis, which are separate from and hyperintense to the nucleus. They represent complete …

Faraday's law states that the EMF induced by a change in magnetic flux depends on the change in flux Δ, time Δt, and number of turns of coils. Faraday's …

For ({text {Ha}}>0), the fluid particles experience a magnetic drag effect which in turn reduces convection within the annulus. For the stronger magnetic field case, the resistive influence is higher on the velocity of fluid particles, and thus, the flow intensity is significantly decreased.

Introduction: A high intensity zone (HIZ) in intervertebral disc (IVD) of lumbar spine is a high intensity signal located in the annulus fibrosus of T2-weighted magnetic resonance (MR) imaging.

Magnetic flux is a measurement of the total magnetic field which passes through a given area. It is a useful tool for helping describe the effects of the magnetic force on …

Study Design. Experimental correlation study design to quantify features of disc health, including signal intensity and distinction between the annulus fibrosus and nucleus pulposus, with T2 * magnetic resonance imaging (MRI) and correlate with the functional mechanics in corresponding motion segments.. Objective.

The prevalence, validity and reliability of high-intensity zones in the annulus fibrosus seen on T2-weighted magnetic resonance images of patients with intractable low-back pain were determined. This sign was readily recognized by two independent observers. It occurred in 28% of 500 patients undergoing magnetic resonance imaging for back pain.