(1) Two sets of a twin-focus X-ray tube and a 12-inch image intensifier (II) were mounted on the gantry in the isocentric and cross-firing positions.
(2) Some of these groups have constructed apparatus based on a radiotherapy simulator gantry, others around a linac or a special purpose gantry.
(3) A device for computed tomography (CT)-guided percutaneous punctures that is not affixed to the patient and can be used even when the gantry is tilted was developed and tested.
(4) The detectability of small acoustic neuromas is considerably improved by the application of newer-generation CT apparatus and the use of specific scanning parameters, including extremely thin overlapping slices, low scan speed, high gantry tilt, short time between contrast agent application and tumor scanning, and computer-assisted magnification of the posterior fossa.
(5) The detector is attached to one arm of the simulator gantry and acquires projection data from a fan beam of X-rays derived from the simulator X-ray tube.
(6) CT scatter was observed to increase as scan field size and slice thickness increased, whilst there was little change in scatter with changes in gantry tilt and table slew.
(7) It may also reveal unexpected mechanical misalignments in the camera gantry.
(8) It was found that there are significant levels of gamma radiation throughout the treatment room, which increase both in the vicinity of the walls in line with the beam axis and in close proximity to the neutron therapy gantry.
(9) To minimize such partial volume effects, the algorithm can be used prospectively, during acquisition, to reposition the scanner gantry and bed to match an earlier study.
(10) The gantry tilt technique provides direct visualization of the pathway of the needle tract; direct visualization is not possible with previously described techniques such as stereotactic biopsy or the triangulation technique.
(11) When a mechanical checkout jig was set up at the same point, a discrepancy of 4 mm resulted when the gantry was moved from 0 degrees to 180 degrees.
(12) Direct sagittal CT was performed by placing the entire infant sideways and supine within the gantry after metrizamide was injected.
(13) The co-table-unit is linked to the original CT table board directly within a few minutes, coming through the opening of the gantry from the rear.
(14) The technique uses concurrent and continuous rotations of both the gantry (300 degrees, from 30 to 330 degrees) and the couch (150 degrees, from 75 to -75 degrees).
(15) Were you aware the circular letter required hotels to set up internal security gantries, metal detectors for checking under vehicles and the guarding of beach entrances?” Lopez, whose role involved delivering holidays to tourists on the ground in Tunisia , said he was not aware of the existence of the letter.
(16) Symmetry in both the radial and transverse axis of each x-ray beam was monitored for eight gantry positions.
(17) The gantry and other things inside the room may contain metal parts, which can cause excess noise.
(18) A mathematical transformation is applied to determine the corresponding cord locations on the oblique radiographs for any arbitrary gantry angle.
(19) "Things are going to start getting exciting once the sun starts to go down," says ITV4's man in the gantry.
(20) During the collection of transmission projection data, suitable for the digital reconstruction of patient cross sections, the simulator gantry rotates continuously through about 360 degrees.