Ultrasound Thermometry for Optimizing heat Supply During a Hyperthermia Therapy of Cancer Tissue

Wolf, Mario; Rath, Katharina; Ruiz, Andrés Eduardo Ramos; Kühnicke, Elfgard

doi:10.1016/j.phpro.2015.08.183

Cited by 7 publications

(2 citation statements)

References 10 publications

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“…As mentioned before, the drawback of echo shift methods is the ripples due to the acoustic lens, but using the proposed method in-vivo shows better suppression of the ripples. Other active thermometry methods based on the echo shifts or speckle tracking are reported in [7][8][9][10][11][12][13][14].…”

Section: Active Thermometrymentioning

confidence: 99%

A Review of Ultrasound Thermometry Techniques

Amiri¹,

Makkiabadi²

2020

fbt

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Acoustic thermometry is one of non-invasive methods to measure the temperature inside tissue area. Especially, when using the thermal therapy techniques such as High Intensity Focused Ultrasound (HIFU) and other thermal based methods, thermal assessment of heated area seems to be necessary. Some of acoustic properties of medium are temperature dependent; therefore, evaluation of temperature dependent parameters will be an indirect and non-invasive approach in thermometry. In this paper some of thermometry methods based on changes in acoustic properties of medium have been reviewed. The published methods are classified in two main categories: passive and active thermometry. In the passive thermometry, the thermal measurement probes, induced no acoustic signals to the medium, but they receive the radiated signals from the heated medium. In active method, the thermometry probe transmits a signal into the heated region and receives the echoes, then the received RF signals are processed in order to measure the temperature.

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Section: Active Thermometrymentioning

confidence: 99%

A Review of Ultrasound Thermometry Techniques

Amiri¹,

Makkiabadi²

2020

fbt

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“…Different solutions have been proposed to meet this challenge, among others, temperature monitoring during ablation has already shown promising results [5]. A real-time feedback of temperature distribution within the organ may be useful to estimate the amount of damaged tissue, hence to lead the physician in the adjustment of laser settings, to optimize the clinical outcomes [6]. Thermometry in thermal treatments has to fulfil strict criteria: spatial resolution better than 5 mm, acquisition time of some seconds, and temperature accuracy of ~1-2 °C [7,8].…”

Section: Introductionmentioning

confidence: 99%

Error of a Temperature Probe for Cancer Ablation Monitoring Caused by Respiratory Movements: <italic>Ex Vivo</italic> and <italic>In Vivo</italic> Analysis

et al. 2016

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Hyperthermal techniques are spreading as an alternative to conventional surgery for cancer removal. A real-time temperature feedback can be used to adjust the treatment settings, in order to improve the clinical outcomes. In this paper, we experimentally assessed the feasibility for distributed temperature monitoring of a custom probe, which consists of a needle embedding six fiber Bragg gratings (FBGs). Since FBGs are also sensitive to strain, we focused on the analysis of the measurement error (artifact) caused by respiratory movements. We assessed the artifact both on ex vivo pig liver and lung (by mimicking the movement of these organs caused by respiration) and on in vivo trial on pig liver. Lastly, we proposed an algorithm to detect and minimize the artifact during ex vivo liver laser ablation. During both ex vivo and in vivo trials, the probe insertion within the organ was easy and safe. The artifact was significant (up to 3 °C), but the correction algorithm allows minimizing the error. The main advantages of the proposed probe are: 1) spatially resolved temperature monitoring (in six points of the tissue by inserting a single needle) and 2) the needle is magnetic resonance (MR)-compatible, hence can be used during MR-guided procedure. Even if the model is close to humans, further trials are required to investigate the feasibility of the probe for clinical applications.

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