Radio frequency magnetic field unit with aperature

The apparatus as in 12, wherein the impedance is adjusted by adjusting a capacitance.

The apparatus as in 12, wherein the impedance is adjusted by adjusting an inductance.

An apparatus comprising:

• a radio frequency magnetic field unit for magnetic resonance including a plurality of current elements that are asymmetrically arranged, wherein at least one current element includes a transmission line segment having a first current path and a parallel return current path for the first current path and at least one current element is physically disconnected from another current element and at least two current elements are reactively coupled.

An apparatus comprising:

• a radio frequency magnetic field unit for magnetic resonance having a plurality of current elements wherein each current element includes a transmission line segment having a first current path and a parallel return current path for the first current path, the radio frequency magnetic field unit adapted to generate a desired magnetic field, the radio frequency magnetic field unit having a first aperture formed at an end of the radio frequency magnetic field unit and a second aperture that is substantially unobstructed, wherein the first aperture is contiguous to the second aperture.

An apparatus comprising:

• a radio frequency magnetic field unit for magnetic resonance having a plurality of current elements wherein each current element includes a transmission line segment having a first current path and a parallel retum current path for the first current path, the radio frequency magnetic field unit having a first side aperture, a second side aperture and a pair of end apertures, the first side aperture and the second side aperture contiguous with each of the pair of end apertures.

A method comprising:

• removing one current element of a plurality of current elements from a first radio frequency magnetic field unit to form a second radio frequency magnetic field unit for magnetic resonance having an aperture, wherein each current element includes a transmission line segment having a first current path and a parallel return current path for the first current path.

A method comprising:

• removing two or more adjacent current elements of a plurality of current elements from a first radio frequency magnetic field unit to form a second radio magnetic field unit for magnetic resonance and having an aperture, wherein each current element includes a transmission line segment having a first current path and a parallel return current path for the first current path.

A method comprising:

• removing two oppositely positioned current elements circuits from a first radio frequency magnetic field unit to form a second radio frequency magnetic field unit for magnetic resonance and having a first aperture and a second aperture wherein each current element circuit includes a transmission line element having a first current path and a parallel return current path for the first current path.

A transverse electromagnetic coil cavity including current elements, the transverse electromagnetic coil for magnetic resonance and having windows or apertures cut between current elements to allow access through the current elements wherein each current element includes a transmission line segment having a first current path and a parallel return current path for the first current path.