Single-Sided Magnet System for Quantitative MR Relaxometry and Preclinical In-Vivo Monitoring.

Objective: We have developed a single-sided magnet system that allows Magnetic Resonance relaxation and diffusion parameters to be measured.

Methods: A single-sided magnet system has been developed, using an array of permanent magnets. The magnet positions are optimised to produce a B magnetic field with a spot that is relatively homogenous and can project into a sample.

Oxygen saturation-dependent effects on blood transverse relaxation at low fields.

Objective: Blood oxygenation can be measured using magnetic resonance using the paramagnetic effect of deoxy-haemoglobin, which decreases the [Formula: see text] relaxation time of blood. This [Formula: see text] contrast has been well characterised at the [Formula: see text] fields used in MRI (1.5 T and above).

Mobile low field magnetic resonance hardware development.

Typically, NMR systems are bulky and expensive laboratory based equipment. For half a century after its scientific discovery taking NMR outside of a laboratory environment is still not a common practice due to the complexity of the underlining physical phenomena and its low sensitivity, to the myriad of technical challenges when integrating a complete system. The scarcity of compact and mobile NMR systems has prevented its proliferation into many other areas and applications.

Phosphorus magnetic resonance spectroscopic imaging using flyback echo planar readout trajectories.

Object: To present and evaluate a fast phosphorus magnetic resonance spectroscopic imaging (MRSI) sequence using echo planar spectroscopic imaging with flyback readout gradient trajectories.

Materials And Methods: Waveforms were designed and implemented using a 3 Tesla MRI system. P spectra were acquired with 2 × 2 cm and 3 × 3 cm resolution over a 20- and 21-cm field of view and spectral bandwidths up to 1923 Hz.

Bone volume-to-total volume ratio measured in trabecular bone by single-sided NMR devices.

Purpose: Reduced bone strength is associated with a loss of bone mass, usually evaluated by dual-energy X-ray absorptiometry, although it is known that the bone microstructure also affects the bone strength. Here, a method is proposed to measure (in laboratory) the bone volume-to-total volume ratio by single-sided NMR scanners, which is related to the microstructure of the trabecular bone.

Methods: Three single-sided scanners were used on animal bone samples.

(1)H-MR imaging of the lungs at 3.0 T.

Background: One disadvantage of magnetic resonance imaging (MRI) is the inability to adequately image the lungs. Recent advances in hyperpolarized gas technology [e.g.

Design and Construction of a Heteronuclear 1H and 31P Double Tuned Coil for Breast Imaging and Spectroscopy.

Magnetic resonance imaging (MRI) is a noninvasive imaging modality that uses radio frequency (RF) energy to excite nuclei in the presence of a strong magnetic field and linear spatially encoding magnetic field gradients. Clinically, MRI takes advantage of the spin properties of hydrogen (1H) nuclei due to the high concentration and relative abundance in tissue water and fats. However, other nuclei having the quantum mechanical property of spin can also be probed.

The technology and performance of 4D ultrasound.

Recent developments in 4D ultrasound imaging technology allow clinicians to obtain not only rich visual information but also quantitative data that can be used for diagnosis and treatment. Some argue that the extension of 2D ultrasound is unnecessary and does not offer any benefits to diagnosis, while others argue that it is possible to better assess an abnormality in 3D than 2D. Anatomy can be reconstructed in perspectives that were never seen with conventional 2D US imaging.