Share This Article:

Disposable Condenser Dosimeter Using a Skin-Insulated Mini-Substrate with a Silicon X-Ray Diode in Image-Guided Radiation Therapy

Full-Text HTML XML Download Download as PDF (Size:3501KB) PP. 35-46
DOI: 10.4236/ijmpcero.2018.71004    373 Downloads   643 Views

ABSTRACT

To measure integral doses in image-guided radiation therapy, we developed a disposable mini-substrate with a 1.0-μF condenser and a silicon X-ray diode (Si-XD). The Si-XD is a high-sensitivity photodiode selected for detecting X-rays. In the substrate with dimensions of 15 × 15 mm2, the initial charging voltage is 3.30 V, and the charging voltage is decreased by photocurrents flowing through the Si-XD during X-ray exposing. The condenser in the substrate is charged by a microcomputer dock, and the charging voltage is also measured using an analog to digital converter in the dock after exposing X-rays. The dock is connected to a personal computer through a USB cable, and integral doses are shown on the PC monitor. The doses were proportional to decreases in the charging voltage, and the calibrated doses corresponded well to those obtained using a readily available ionization chamber.

Cite this paper

Yamaguchi, S. , Sato, E. , Nakamura, R. , Oikawa, H. , Kakuhara, H. , Kikuchi, K. , Ariga, H. and Ehara, S. (2018) Disposable Condenser Dosimeter Using a Skin-Insulated Mini-Substrate with a Silicon X-Ray Diode in Image-Guided Radiation Therapy. International Journal of Medical Physics, Clinical Engineering and Radiation Oncology, 7, 35-46. doi: 10.4236/ijmpcero.2018.71004.

Copyright © 2020 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.