Chest MR images (1 cm thick slices) of the same normal subject. Left: fast spin-echo proton image. Right: FLASH He3 image of the gas in the lungs. The NMR frequency is changed from 64 MHz for protons to 49 MHz for He3.
Images: J. Wild, Sheffield.
More comments in Proc.19th Int. Conf. On Atomic Physics, Rio, Brazil, July 2004: "Polarised Helium to Image the Lung".

 

 

Dynamic images collected using a sliding window radial sequence; the time interval between displayed images is 0.5s.
Top row: healthy normal subject, from the first part of an inhalation of 300 ml of He3 polarized to 40%.
Bottom row: COPD patient showing regions of ventilation obstruction in both lungs, particularly in the upper lobes, and a delayed emptying/depolarization of gas in the lower left lobe which could be indicative of air trapping.
J. Wild, M.N.J. Paley, L. Kasuboski et al., Magn. Reson. Med. 49, 991 (2003): Dynamic radial projection MRI of inhaled hyperpolarized He3
Images: J. Wild, Sheffield.
More comments in Proc.19th Int. Conf. On Atomic Physics, Rio, Brazil, July 2004: "Polarised Helium to Image the Lung".

 

 

 

Left to right: gas distribution images, ADC maps and ADC histograms in 3 subjects (top to bottom).
Images: J. Wild, Sheffield.
More comments in Proc.19th Int. Conf. On Atomic Physics, Rio, Brazil, July 2004: "Polarised Helium to Image the Lung".

 

 

 

High temporal resolution (100 images/second) of a rat breathing cycle (20s total acquisition time).
Image: Y. Crémillieux, Lyon

 

 
High resolution ventilation image of a rat lung using a dedicated HP Helium3 respirator.
Image: Y. Crémillieux, Lyon

 

Dynamic ventilation image series of high temporal resolution in a normal rat
Images: Y. Crémillieux, Lyon

 

 

 

Optical pumping laboratory setup at Mainz University
Images: J. Schmiedeskamp, Mainz

 

Photograph of the transport units containing a spherical glass vessel of V = 1 liter. Relaxation times of more than 100 h are routinely achieved in these containers.

 

 

Photograph of a compact prototype gas polariser developed in Paris (size: 1.1x0.64x0.64 m3), routinely used for MRI since 2003.
Images: PJ Nacher, Paris

 

Vertical-axis 3mT whole-body MR system used for in-vivo relaxometry studies
(see Bidinosti et al., J. Magn. Reson. 162 (2003) 122 "In-vivo NMR of hyperpolarized 3He in the human lung at very low magnetic fields".)

 

 

 

Low-field (0.08 T) permanent Magnet developed in the Cracow Group for small animal MRI.
Images: T. Palasz, Cracow

 

 Calibration of the antenna using a low pressure optically pumped cell

 

 

 

 

 

 

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last updated on January 20th, 2006 by P.J. Nacher