Organic Field‐Effect Transistors as Flexible, Tissue‐Equivalent Radiation Dosimeters in Medical Applications

• Published in: Advanced science Vol. 7; no. 18; pp. 2001522 - n/a
• Main Authors: Zeidell, Andrew M., Ren, Tong, Filston, David S., Iqbal, Hamna F., Holland, Emma, Bourland, J. Daniel, Anthony, John E., Jurchescu, Oana D.
• Format: Journal Article
• Language: English
• Published: Germany John Wiley & Sons, Inc 01-09-2020; John Wiley and Sons Inc; Wiley
• Subjects: Cancer therapies; Charged particles; Communication; Communications; dosimetry; flexible electronics; organic field effect transistors; radiation detection; Radiation detectors; Radiation therapy; Semiconductors; Transistors; X-rays; X‐ray detection; radiation detection; flexible electronics; organic field effect transistors; X‐ray detection; dosimetry
• ISSN: 2198-3844; 2198-3844
• DOI: 10.1002/advs.202001522

Radiation therapy is one of the most prevalent procedures for cancer treatment, but the risks of malignancies induced by peripheral beam in healthy tissues surrounding the target is high. Therefore, being able to accurately measure the exposure dose is a critical aspect of patient care. Here a radiation detector based on an organic field‐effect transistor (RAD‐OFET) is introduced, an in vivo dosimeter that can be placed directly on a patient's skin to validate in real time the dose being delivered and ensure that for nearby regions an acceptable level of low dose is being received. This device reduces the errors faced by current technologies in approximating the dose profile in a patient's body, is sensitive for doses relevant to radiation treatment procedures, and robust when incorporated into conformal large‐area electronics. A model is proposed to describe the operation of RAD‐OFETs, based on the interplay between charge photogeneration and trapping.
A radiation detector based on an organic field‐effect transistor (RAD‐OFET) is introduced for passive radiation dosimetry. RAD‐OFETs are tissue‐equivalent devices that can be placed directly on a patient's skin to directly measure radiation dose delivery and are sensitive for doses relevant to many radiation treatment procedures.