On the optimization of imaging parameters for magnetic resonance imaging thermometry using magnetic microparticles

Stroud, John; Hankiewicz, J; Camley, R. E.; Celiński, Z.

doi:10.1016/j.jmr.2021.107108

Cited by 3 publications

(2 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…More recently, manganese, cobalt, and zinc ferrites appeared as an option, with the advantage of tuning the transition temperature by doping. [13][14][15][16] However, having simultaneously isolated NPs and a large decrease of the magnetic response with temperature is proving difficult: in agglomerates of nanocrystals the decrease of magnetization with temperature is high, leading to a good temperature sensitivity, but when isolated NPs are obtained, the decrease of magnetization is much smaller. [17] We believe that this is associated with the fact that nanosized magnetic systems have a transition temperature broadened due to surface effects, [18] and that this broadening is more dramatic in low anisotropy materials such as ferrites, since the magnetic transitions are broader in 3D latices of low anisotropy (Heisenberg) spins, when compared with 3D latices of high anisotropy (Ising) spins (see, for instance [19]).…”

Section: Introductionmentioning

confidence: 99%

Simultaneous near infrared photothermal therapy and temperature mapping by magnetic resonance in 3D cell aggregates loaded with Fe3Se4 nanoparticles

Soeiro,

Pereira,

Oliveira-Silva

et al. 2024

Preprint

View full text Add to dashboard Cite

Control over temperature in space and time is of utmost importance in many contexts, including photothermal therapies, where a good temperature monitoring and control is expected to improve their clinical outcome. One of the most promising techniques involves the use of magnetic resonance imaging, exploring the temperature change of proton relaxometric properties or exploring the temperature change of contrast agents. In real applications, the use of contrast agents for thermometry is much better justified if thermometry comes as an added value of a photothermal agent. Here we show iron selenide nanoparticles (NPs) that are able to work simultaneously as efficient near infrared photothermal and thermometry agents embedded in cellular models at concentrations where their toxicity is low. The simultaneous heat generation and temperature mapping around these NPs allow the control over the depth achieved by the therapy and detection and control of hot spots that would be otherwise overlooked, for instance.

show abstract

Section: Introductionmentioning

confidence: 99%

Simultaneous near infrared photothermal therapy and temperature mapping by magnetic resonance in 3D cell aggregates loaded with Fe3Se4 nanoparticles

Soeiro,

Pereira,

Oliveira-Silva

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…There are many imaging methods for temperature monitoring, such as infrared thermography, ultrasound imaging, and magnetic resonance imaging. During the monitoring of temperature, infrared thermography [13] can only measure temperature from surface tissue layers, ultrasound methods [14] can only detect relative temperature changes and they lack sufficient accuracy for temperature measurement due to inherent tissue motion artifacts; magnetic resonance imaging [15] is costly and requires long acquisition times to provide high resolution and accurate temperature maps. Photoacoustic imaging has the advantages of both acoustic and optical imaging and is a real-time, noninvasive, high-precision and high-resolution imaging modality [16] .…”

Section: Introductionmentioning

confidence: 99%

Photoacousto-photothermal effect and temperature monitoring of tissues subjected to graphene oxide

Lin

Zhang

et al. 2023

Sixteenth International Conference on Photonics and Imaging in Biology and Medicine (PIBM 2023)

View full text Add to dashboard Cite

Tissue local temperature information is necessary for guiding treatment parameters in photothermal therapy. Therefore, a temperature monitoring method suitable for the treatment process is needed for monitoring tissue temperature in real time. In this study, a temperature monitoring system based on PID on the photothermal effect of graphene oxide on tissue was proposed. Graphene Oxide (GO) has high photothermal conversion performance and low cytotoxicity under near infrared laser irradiation at 808nm. The photoacoustic imaging system and infrared thermal imager were employed to monitor the effect of GO as a photothermal agent on the photoacoustic signal and temperature of tissues. Firstly, the relationship between the intensity of photoacoustic signal and the temperature of tissues under the action of GO was established. Then, the PID feedback algorithm was applied to monitor and regulate the temperature change of tissues by the intensity of photoacoustic signal, so as to achieve the purpose of photothermal treatment. The results show that GO can enhance the photoacoustic signal of the tissue under laser irradiation and improve the temperature of the irradiated tissue. The system can effectively monitor and regulate the tissue temperature to achieve the therapeutic effect of tumor with little effect on normal tissue.

show abstract

Magnetic particle based MRI thermometry at 0.2 T and 3 T

Stroud

Hao

Read

et al. 2023

Magnetic Resonance Imaging

View full text Add to dashboard Cite

On the optimization of imaging parameters for magnetic resonance imaging thermometry using magnetic microparticles

Cited by 3 publications

References 26 publications

Simultaneous near infrared photothermal therapy and temperature mapping by magnetic resonance in 3D cell aggregates loaded with Fe3Se4 nanoparticles

Simultaneous near infrared photothermal therapy and temperature mapping by magnetic resonance in 3D cell aggregates loaded with Fe3Se4 nanoparticles

Photoacousto-photothermal effect and temperature monitoring of tissues subjected to graphene oxide

Magnetic particle based MRI thermometry at 0.2 T and 3 T

Contact Info

Product

Resources

About