Integral Dose and High Energy Radiation

Scarpa, G.

doi:10.1259/0007-1285-33-396-770

Cited by 8 publications

(1 citation statement)

References 4 publications

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“…The concept of integral dose (or energy imparted) was originally introduced in radiotherapy in ;he hope that good correlation with patient response to radiation treatment could be obtained. Estimation of the energy imparted has usually been based either upon an integration of measured depth-dose data (usually extrapolated to infinite field size) or by calculation of the incident energy fluence together with an estimate of the fraction of energy absorbed in the patient (Happey 1940, 1941, Mayneord 1940, Smithers 1942, Mayneord and Clarkson 1944, Meredith and Neary 1944, Ellis 1945, Loeffler 1956, Bewley er a1 1959, Scarpa 1960, Carlsson 1963.…”

Section: Introductionmentioning

confidence: 99%

A re-evaluation of the 'saturated scatter' method for estimating the energy imparted to patients during diagnostic radiology examinations

Harrison¹

1983

Phys. Med. Biol.

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Central-axis depth dose data for diagnostic qualities (1-4 mm Al HVL) have been used to calculate the total energy imparted to patients or phantoms during X-ray examinations. A 'saturated scatter' method has been used and allowance is made for the finite dimensions of the patient by using PDD data for large but finite field sizes. For the purpose of integration, PDD data have been represented as a function of depth by two exponential components. Data in the form of energy imparted per unit central-axis surface dose and per unit surface X-ray field are tabulated as functions of kVp, first HVL, phantom thickness and the field size of the original PDD data. Comparison with energy fluence calculations of total energy imparted made by other workers indicates good agreement under similar phantom and X-ray quality conditions, although it is noted that anatomical variations between patients will in practice lead to uncertainties in the total energy imparted.

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