Request for proposal: Calibration system for kilovoltage
X ray dosimetry at the SSDL level for Costa Rica
In contrast, Sensus Healthcare's SRT-100(TM) and SRT-100 Vision(TM) use kilovoltage
X-rays in the 50 to 100 kilo volts (KV) energy range.
General technical ALARA strategies to reduce exposure include: 1) weight-based protocols for radiation parameters (eg, kilovoltage
, kV; milliamperage, mAs); and, 2) body and selective organ protective shielding.
Being radio-opaque, gold seeds are easily identified on kilovoltage
and megavoltage x-rays.
Elekta's Infinity system, with kilovoltage
CBCT imaging provides very good images of the tumor and surrounding soft tissues, which will give us greater confidence in the location and dimensions of the tumor target immediately before we deliver the beams," says Jan Seppala, Ph.
A sampling of topics: a brief history of dosimetry, calibration protocols, and the need for accuracy; cavity theory, stopping-power ratios, and correction factors; ionization chamber instrumentation; review of TG-51 protocol; kilovoltage
x-ray dosimetry; clinical electron beam dosimetry, thermoluminescent detector and Monte Carlo techniques for reference-quality brachytherapy dosimetry; dosimetry for small photo beams used for stereotactic radiosurgery/radiotherapy; hadron dosimetry; radiochronic film; diamond detector; gel dosimetry; Fricke and alanine dosimeters; and stopping-power ratios, rations of mass-energy coefficients, and CSDA ranges of electrons.
The characterisation was performed by doing entrance exposure measurements using the manual technique, fixing the kilovoltage
and varying the mAs, and then repeating the procedure for a series of kilovoltages
: 23, 25, 26, 28, 30, 32 and 34 kVp.
Scans were performed at a peak kilovoltage
of 120 kVp and 80 mA with a 1.
The role of kilovoltage
irradiation in the treatment of keloids.
Elekta Synergy(TM) is an Elekta state-of-the-art digital linear accelerator equipped with a kilovoltage
source and a solid-state detector to allow 2D kV planar or 3D X-ray Volume Imaging (XVI) of the patient in the treatment position.
The Trust is currently considering a forthcoming requirement for a kilovoltage
x-ray unit capable of delivering radiotherapy treatments.
5) Recent investigations have shown that reducing kilovoltage
to 70 kVp offers additional advantages.