Non linear response of TLD-100 irradiate by an Intra Operative Radiation Therapy linear accelerator: preliminary results(350 views) Savino F, Pugliese M, D'Avino V, Cella L, Liuzzi R
Non linear response of TLD-100 irradiate by an Intra Operative Radiation Therapy linear accelerator: preliminary results
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Abstract
Thermoluminescence dosimetry is one of the most widely used and cheap techniques of radiation dosimetry. Thermoluminescence dosimeters (TLD) features many advantages such as small detector size and close tissue equivalence that make it useful for application in radiotherapy in vivo dosimetry. Due to their small size, TLDs are convenient for point dose measurements in phantoms as well as for in vivo dosimetry on patients during radiotherapy treatment [1]. The response of TLDs is energy and dose-per-pulse rate dependent. Intra Operative Radiation Therapy (IORT) is a treatment modality where a large single radiation dose is delivered during a surgery, either with or without a resection of a neoplastic mass. Accelerators specifically designed for IORT are characterized by dose-per-pulse rate (about 3–12cGy/pulse) several times higher than conventional accelerators (0.1–0.6cGy/pulse) [2]. The behaviour of TLD dosimeters when irradiated by high dose-per-pulse beam was not been fully investigated. In the present study, a characterization of TLD’s response to high dose-per-pulse electron beam from an IORT device was carried out.
Non linear response of TLD-100 irradiate by an Intra Operative Radiation Therapy linear accelerator: preliminary results