Marvin C Ziskin1. 1. Center for Biomedical Physics, Temple University School of Medicine, Philadelphia, PA 19140, USA. ziskin@temple.edu
Abstract
OBJECTIVE: A new index is proposed to help sonographers easily assess the risk of an adverse thermal effect arising from a clinical examination. It is called the thermal dose index (TDI). METHODS: The TDI uses the familiar thermal index (TI) and the examination duration to compute a dimensionless index. RESULTS: The greater the TDI value, the greater the risk of a thermally induced adverse effect. If the TDI is 1 or less, there is no expectation of a thermally induced adverse effect. CONCLUSIONS: Like the TI, the TDI would be a convenient index that is continually updated and displayed during an ultrasound examination. The TDI is a new estimate of thermal risk that takes into account the duration of an ultrasound examination.
OBJECTIVE: A new index is proposed to help sonographers easily assess the risk of an adverse thermal effect arising from a clinical examination. It is called the thermal dose index (TDI). METHODS: The TDI uses the familiar thermal index (TI) and the examination duration to compute a dimensionless index. RESULTS: The greater the TDI value, the greater the risk of a thermally induced adverse effect. If the TDI is 1 or less, there is no expectation of a thermally induced adverse effect. CONCLUSIONS: Like the TI, the TDI would be a convenient index that is continually updated and displayed during an ultrasound examination. The TDI is a new estimate of thermal risk that takes into account the duration of an ultrasound examination.
Authors: Gadi Cohen; Hiba Natsheh; Youhan Sunny; Christopher R Bawiec; Elka Touitou; Melissa A Lerman; Philip Lazarovici; Peter A Lewin Journal: Ultrasound Med Biol Date: 2015-05-21 Impact factor: 2.998