Journal of Medical Physics
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Year : 2000  |  Volume : 25  |  Issue : 1  |  Page : 34-40

Physical, Technical And Dosimetic Aspects For High Dose Rate (HDR) Interstitial Implants For Carcinoma Breast



Correspondence Address:
R M Nehru


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Source of Support: None, Conflict of Interest: None


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Brachytherapy using iridium-I92 HDR remote afterloading system is a fast developing modality being witnessed in modern radiation therapy. The dose distribution of HDR interstitial implants are controlled by a single high activity Iridium-192 stepping source by changing the dwell times. The purpose of this paper is to bring out the important physical, technical and dosimetric aspects of high dose rate (HDR) interstitial implants for carcinoma breast. A dosimetric comparison of the Stepping Source Dosimetry System (SSDS) and Paris System of implants revealed that the SSDS offers more uniform dose than the Paris System of implants traditionally used for low dose rate brachytherapy applications. Also, SSDS demands less number of catheters compared to Paris system for a given target volume. The analysis of natural Dose Volume Histograms (nDVH) eliminates the error in the dose delivery by correcting the dose prescription and normalisation.


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