Experimental determination of the radial dose function of 90Sr/90Y IVBT sources.
A series of measurements were undertaken using both high sensitivity radiochromic film and new lithium fluoride thermoluminescent dosimeters in a liquid water medium to define the radial dose function of 90Sr/90Y beta emitting intravascular brachytherapy sources more accurately. These measurements of a single 5 French source pellet served to verify current Monte Carlo transport models and extrapolation chamber measurements of the radial dose function, thus providing the recommended independent published measurements for g(r) of these sources. A slight deviation in the published radial dose function at depth leads the authors to recommend that treatment planning be performed using updated g(r) values from current Monte Carlo transport models verified by measurements such as those shown in this investigation.
Holmes
Shannon M
SM
University of Wisconsin-Madison, Department of Medical Physics, Madison, Wisconsin 53706, USA.
DeWerd
Larry A
LA
Micka
John A
JA
D001807:Blood Vessel Prosthesis; D001918:Brachytherapy / Q000295:instrumentation* / Q000379:methods; D004867:Equipment Design; D019544:Equipment Failure Analysis; D011874:Radiometry / Q000379:methods*; D011879:Radiotherapy Dosage; D015203:Reproducibility of Results; D012542:Scattering, Radiation; D012680:Sensitivity and Specificity; D015607:Stents; D013326:Strontium Radioisotopes / Q000032:analysis*; D015021:Yttrium Radioisotopes / Q000032:analysis*
D013326:Strontium Radioisotopes; D015021:Yttrium Radioisotopes