Advances in kilovoltage x-ray beam dosimetry

@article{Hill2014AdvancesIK,
  title={Advances in kilovoltage x-ray beam dosimetry},
  author={R. Hill and Brendan Healy and Lois C Holloway and Zdenka Kuncic and David Thwaites and Clive Baldock},
  journal={Physics in Medicine and Biology},
  year={2014},
  volume={59},
  pages={R183 - R231}
}
This topical review provides an up-to-date overview of the theoretical and practical aspects of therapeutic kilovoltage x-ray beam dosimetry. Kilovoltage x-ray beams have the property that the maximum dose occurs very close to the surface and thus, they are predominantly used in the treatment of skin cancers but also have applications for the treatment of other cancers. In addition, kilovoltage x-ray beams are used in intra operative units, within animal irradiators and in on-board imagers on… 

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References

SHOWING 1-10 OF 428 REFERENCES

Study of dosimetry consistency for kilovoltage x-ray beams.

TLDR
Comparisons of the doses at the phantom surface and at 2 cm depth in water for photon beams of 100-300 kV tube potential obtained using the "backscatter" method and those using the in-phantom measurement have shown that the "in-air" method can be equally applied to this energy range if the depth-dose curve can be measured accurately.

Perturbation effects in dosimetry: Part I. Kilovoltage x-rays and electrons.

  • A. Nahum
  • Physics, Medicine
    Physics in medicine and biology
  • 1996
TLDR
It is concluded that Monte Carlo simulation of dosimeter response is likely to play an even bigger role in the future.

An evaluation of ionization chambers for the relative dosimetry of kilovoltage x-ray beams.

TLDR
The results indicate that the Advanced Markus, Markus, NACP, and Roos parallel plate ionization chambers were suitable for the measurement of depth dose data in this beam quality range with an uncertainty of less than 3%, including in the regions close to the water surface.

An investigation of dose changes for therapeutic kilovoltage X-ray beams with underlying lead shielding.

TLDR
The effect on both the surface dose and depth doses in a water phantom with lead shielding at depth in the phantom is investigated and the Monte Carlo calculations showed good agreement with the measured results, this method can be used to verify surface dose changes in clinical situations where measurements are difficult.

Dosimetry measurements with an intra-operative x-ray device

TLDR
C calibration of ionization chambers, radiochromic film and other relative dosimeters could be performed on the superficial unit, which has the advantage of higher dose rates and lower dependence on small variations in detector positioning.

Measurement of percentage depth dose and lateral beam profile for kilovoltage x-ray therapy beams.

TLDR
Nine commonly used dosimetry detectors have been investigated to determine suitable relative dosimeters for kilovoltage x-ray beams and it was determined that for the detectors studied the PTW N23342, Markus and NACP parallel-plate chambers are more suitable for the measurement of percentage depth dose data.

Dosimetric evaluation of a widely used kilovoltage x-ray unit for endocavitary radiotherapy.

TLDR
The dosimetric data of a Therapax DTX300 kilovoltage x-ray unit for endocavitary rectal irradiation is presented and the detector size has a significant effect on the penumbral profile.

Clinical implementation of AAPM TG61 protocol for kilovoltage x-ray beam dosimetry.

TLDR
The authors' traditional procedures and the TG61 protocol for in-air measurements are equivalent and the application of theTG61 factors can result in up to 5% differences in the determination of the absorbed dose.

The dosimetry of eye shields for kilovoltage X-ray beams

TLDR
The results show that these tungsten eye shields are suitable for use with kilovoltage X-ray beams, however, the clinical impact needs to be considered for the higherX-ray beam energies.

A dosimetric intercomparison of kilovoltage X-rays, megavoltage photons and electrons in the Republic of Ireland.

...