Abstract: A cylindrical whole body magnetic resonance imaging system gradient shielding coil having multiple windings which are individually wound about a cylindrical support structure such that the windings are evenly distributed in azimuthal angle and interleaved with one another. The windings are preferably spaced in azimuthal angle by 360°/N, where N is the number of windings. In such a design, m azimuthal harmonic components of the error field caused by the effects of eddy currents within the imaging volume can be canceled. Canceling an increasing number of m components requires increasing the N number of windings.

Abstract: A cylindrical whole body magnetic resonance imaging system gradient shielding coil having multiple windings which are individually wound about a cylindrical support structure such that the windings are evenly distributed in azimuthal angle and interleaved with one another. The windings are preferably spaced in azimuthal angle by 360°/N, where N is the number of windings. In such a design, m azimuthal harmonic components of the error field caused by the effects of eddy currents within the imaging volume can be canceled. Canceling an increasing number of m components requires increasing the N number of windings.

Abstract: The method disclosed herein includes the steps of providing a computed tomography image having a base component, a first component of a first material, and a second component of a second material, the first and second materials causing beam hardening artifacts, segmenting the image into different sections, each section containing one of the artifact-causing components, calculating thickness of components in one of the sections, calculating a correction factor to compensate for artifacts created by the artifact-causing component in the section, and adding the correction factor to the image and additionally, the providing step may include the step of providing raw image data, which can then be converted into image data representative of the computed tomography image.

Abstract: A cylindrical whole body MRI z gradient coil having multiple windings which are individually wound about a cylindrical support structure such that the windings are evenly distributed in azimuthal angle and interleaved with one another. The windings are preferably spaced in azimuthal angle by 360.degree./N, where N is the number of windings. In such a design, there is no net gradient along any transverse direction and the homogeneity of the gradient field in the transverse direction is thereby improved due to the resultant cancellation in terms proportional to the transverse field gradients. The multiple windings may be selectively connected in series or parallel in accordance with the output impedance and inductance of the current supply.

Abstract: A cleaning and chemical applicator element, attached to a handle, for cleaning and application of chemicals between the toes of a person's foot.

Abstract: An improved method and apparatus for accurately measuring the applied kilovoltage (KV) of an X-ray source over a wide dynamic operating range. A pair of radiation detectors are mounted beneath a rotatable disc having disposed thereon a plurality of metallic absorbers. To measure applied KV, two exposures are required. In the first exposure, called the "calibration" exposure, the detectors are filtered by two absorbers of equal thickness (t.sub.1) and the detected X-ray intensities are measured, processed, and stored in a digital memory. In the second X-ray exposure, referred to the "measure" exposure, the filter wheel is automatically advanced so that one detector is filtered by an absorber of thickness (t.sub.1) and the second detector is filtered by an absorber of thickness (t.sub.2). The detected X-rays are gain measured and the ratio of the signals calculated to determine the relative penetrating energy.