Patents by Inventor Alasdair Stewart Hall

Alasdair Stewart Hall has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Injector for injection of pre-polarised fluid into a patient for magnetic resonance (MR) measurement
    Patent number: 6208885
    Abstract: A patient bed (1) of an MR imaging apparatus is provided with a tube (17) through which pre-polarised fluid can be injected into a patient in order to improve contrast when imaging veins, arteries or other vessels in the body. Fluid is delivered from pump (2) into a high field polarising magnet (3) and along a tube (4) to the patient. Valve (5) is provided so that fluid in the tube (4) downstream of the pre-polarised fluid can be discarded rather than being injected in the patient, and is associated with a reservoir into which the fluid to be discarded and the pre-polarised fluid can be rapidly injected. Then, when the pre-polarised fluid is injected into the patient, its magnetisation has not deteriorated by as much as it would have done if the tube (4) had been directly connected into the patient.
    Type: Grant
    Filed: January 4, 1999
    Date of Patent: March 27, 2001
    Assignee: Picker International, Inc.
    Inventors: Ian Robert Young, Joseph Vilmos Hajnal, Alasdair Stewart Hall