Experimental Determination of Absorbed Dose from X-Rays Near the Interface of Soft Tissue and Other Material

Wingate, Catharine L.; Groß, W.; Failla, G.

doi:10.1148/79.6.984

Cited by 45 publications

(9 citation statements)

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“…Bone Interfaces 549 Wingate et al (1962) have shown, as previously mentioned, that when the spectra have a narrow energy distribution there is good agreement with doses calculated for monoenergetic photons. 300 kvp x-ray unit.…”

Section: X-ray Dose Atsupporting

confidence: 69%

Feed-Forward Tracking Servo System for High-Data-Rate Optical Recording

Koide¹,

Yanagisawa²,

Tokumaru³

et al. 2003

Jpn. J. Appl. Phys.

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IBSTRACT. The increased x-ray dose to soft tissue adjacent to plane bone interfaces v x s measured as a function of x-ray quality and depth. The measurements were pwfonned using a thin pol>-ethj-lene-film dosemeter. Experimental data are presented for tl variety of clinically useful x -r a y qualities. Comparison of the results with calculated doses assuming monoenergetic photons jhox-s discrepancies which are attributed to the x-ray spectra. It is shown that 1%-hen the x-ray spectra are broad and of low quality (lorn kvp and low filtration) differences between the measured and calculated values are great.

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Section: X-ray Dose Atsupporting

confidence: 69%

Feed-Forward Tracking Servo System for High-Data-Rate Optical Recording

Koide¹,

Yanagisawa²,

Tokumaru³

et al. 2003

Jpn. J. Appl. Phys.

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“…The dose measurements were made using a polyethylene-film dosemeter. Mea'surements of a similar nature performed by Wingate, and Failla (1962), using an extrapolat'ion chamber: were shown t'o be in good agreement with calculations performed assuming an effective photon energy. However, the measurements by these investigators were limited in the low energy region to x-ray spect'ra of narrow energy dist'ribution, due to the high inherent filtration of t'he x-ray tube used.…”

Section: Introductionsupporting

confidence: 63%

Increased X-ray Dose Adjacent to Plane Bone Interfaces as Measured in Polyethylene

Lentsch¹,

Finston²

1967

pmb

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The increased x-ray dose to soft tissue adjacent to plane bone interfaces v x s measured as a function of x-ray quality and depth. The measurements were pwfonned using a thin pol>-ethj-lene-film dosemeter. Experimental data are presented for tl variety of clinically useful x -r a y qualities. Comparison of the results with calculated doses assuming monoenergetic photons jhox-s discrepancies which are attributed to the x-ray spectra. It is shown that 1%-hen the x-ray spectra are broad and of low quality (lorn kvp and low filtration) differences between the measured and calculated values are great.

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“…They reported a dose enhancement factor of approximately three near a polystyrene/lead interface, for x rays of 1.7 mm Cu HVL. Wingate et al 68 reported a 1.5-2.2-fold increase in absorbed dose at a one micron distance upstream from a soft tissue/glass interface for superficial and orthovoltage x rays. The dose enhancement fell to a factor of 1.2 at a distance of 5 m from the interface boundary.…”

Section: Electron Contamination Of Clinical Beamsmentioning

confidence: 99%

AAPM protocol for 40–300 kV x‐ray beam dosimetry in radiotherapy and radiobiology

et al. 2001

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The American Association of Physicists in Medicine ͑AAPM͒ presents a new protocol, developed by the Radiation Therapy Committee Task Group 61, for reference dosimetry of low-and mediumenergy x rays for radiotherapy and radiobiology (40 kVрtube potentialр300 kV). It is based on ionization chambers calibrated in air in terms of air kerma. If the point of interest is at or close to the surface, one unified approach over the entire energy range shall be used to determine absorbed dose to water at the surface of a water phantom based on an in-air measurement ͑the ''in-air'' method͒. If the point of interest is at a depth, an in-water measurement at a depth of 2 cm shall be used for tube potentials у100 kV ͑the ''in-phantom'' method͒. The in-phantom method is not recommended for tube potentials Ͻ100 kV. Guidelines are provided to determine the dose at other points in water and the dose at the surface of other biological materials of interest. The protocol is based on an up-to-date data set of basic dosimetry parameters, which produce consistent dose values for the two methods recommended. Estimates of uncertainties on the final dose values are also presented.

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Experimental Determination of Absorbed Dose from X-Rays Near the Interface of Soft Tissue and Other Material

Cited by 45 publications

References 0 publications

Feed-Forward Tracking Servo System for High-Data-Rate Optical Recording

Feed-Forward Tracking Servo System for High-Data-Rate Optical Recording

Increased X-ray Dose Adjacent to Plane Bone Interfaces as Measured in Polyethylene

AAPM protocol for 40–300 kV x‐ray beam dosimetry in radiotherapy and radiobiology

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