scholarly journals Adaptive Real-Time Bioheat Transfer Models for Computer-Driven MR-Guided Laser Induced Thermal Therapy

2010 ◽  
Vol 57 (5) ◽  
pp. 1024-1030 ◽  
Author(s):  
David Fuentes ◽  
Yusheng Feng ◽  
Andrew Elliott ◽  
Anil Shetty ◽  
Roger J McNichols ◽  
...  
Keyword(s):  
Real Time ◽  
Thermal Therapy ◽  
Bioheat Transfer ◽  
Transfer Models

Real-time control of nanoparticle-mediated thermal therapy using photoacoustic imaging

2020 ◽  
pp. 1-1
Author(s):  
Hisham Assi ◽  
Celina Yang ◽  
Elyas Shaswary ◽  
Mareck Tam ◽  
Jahan Tavakkoli ◽  
...  
Keyword(s):  
Real Time ◽  
Photoacoustic Imaging ◽  
Thermal Therapy ◽  
Real Time Control ◽  
Time Control

scholarly journals THERMAL LESION FORMATION AND DETERMINATION FOR EXTERNAL ULTRASOUND THERMAL THERAPY

2003 ◽  
Vol 15 (03) ◽  
pp. 124-132 ◽  
Author(s):  
HAO-LI LIU ◽  
YUNG-YAW CHEN ◽  
JIA-YUSH YEN ◽  
WIN-LI LIN
Keyword(s):  
Blood Perfusion ◽  
Heating System ◽  
Target Volume ◽  
Thermal Therapy ◽  
Bioheat Transfer ◽  
Heating Process ◽  
Thermal Lesion ◽  
Feedback Information ◽  
Temperature Feedback ◽  
Heating Pattern

The purpose of this paper is to investigate the relationship between the formation of the thermal lesion and the major parameters of the external ultrasound heating systems, and to propose a useful thermal lesion determination procedure, which is capable of specifying the range of a thermal lesion by temperature feedback in external ultrasound thermal therapy. This work is based on an ideal ultrasound power deposition formed by an external ultrasound heating system and the temperature distribution is calculated by the transient bioheat transfer equation. A simplified model was employed to determine the heating pattern for four most important parameters. Through the simplified power expression, the property of a new parameter, T300, which is defined as the maximal temperature corresponding to the thermal dose of 300 minutes, is also investigated. When the target volume is large enough such that the thermal conduction effect becomes negligible, the T300 value is almost independent of the system parameters and the heating strategies, and is dominated by the blood perfusion rate with a monotonic correlation. The method enables us to use feedback information in the ultrasound heating process and to pre-determine the heating range of the thermal lesion, which will be very useful in ultrasound treatment planning.

scholarly journals Infrared-Emitting QDs for Thermal Therapy with Real-Time Subcutaneous Temperature Feedback

2016 ◽  
Vol 26 (33) ◽  
pp. 6060-6068 ◽  
Author(s):  
Blanca del Rosal ◽  
Elisa Carrasco ◽  
Fuqiang Ren ◽  
Antonio Benayas ◽  
Fiorenzo Vetrone ◽  
...  
Keyword(s):  
Real Time ◽  
Thermal Therapy ◽  
Temperature Feedback

Three-Dimensional Thermal Therapy using Multiple Planar Ultrasound Transducers with Real-time MR Temperature Feedback in Gel Phantoms

2009 ◽  
Author(s):  
Kee Tang ◽  
Matthew Asselin ◽  
Mathieu Burtnyk ◽  
Rajiv Chopra ◽  
Michael Bronskill ◽  
...  
Keyword(s):  
Real Time ◽  
Three Dimensional ◽  
Thermal Therapy ◽  
Ultrasound Transducers ◽  
Temperature Feedback

Thermal Therapy Protocols for Benign Prostatic Hyperplasia

2007 ◽  
Author(s):  
Daniel Chinn ◽  
Elvis Nditafon ◽  
Alvin Yew ◽  
Chandrasekhar Thamire
Keyword(s):  
Benign Prostatic Hyperplasia ◽  
Thermal Damage ◽  
Prostatic Hyperplasia ◽  
Operating Conditions ◽  
Thermal Therapy ◽  
Bioheat Transfer ◽  
Surrounding Tissue ◽  
Accurate Estimation ◽  
Transfer Model ◽  
Porous Media Model

Thermal therapy for treatment of benign prostatic hyperplasia (BPH) is becoming increasingly popular due to the minimally invasive nature of the treatment. Successful management of such therapy requires accurate estimation of thermal dosage. The purpose of this study is to provide correlations for the thermal damage caused by ultrasound, microwave, and infrared devices under a range of operating conditions. A boundary-fitting finite difference method is used to examine the heat transfer in the prostate gland and surrounding tissue. The Pennes bioheat transfer model and a porous media model were utilized to calculate temperature histories. Necrosis zones were determined using published necrosis data for prostatic tissue and cells. Thermal damage correlations for the three different hyperthermia sources along with sample temperature contours and necrosis zones are presented. Results indicate that the applicator power level and heating time are the most important parameters in achieving the desired necrosis zones, while coolant parameters strongly affect the temperatures of the sensitive urethra and serve as constraints for protocol parameters. Out of the three sources evaluated, ultrasound modality appears to be the most capable of causing necrosis in the target zones, with least damage to the surrounding healthy tissues.

scholarly journals Dimensionless solutions and general characteristics of bioheat transfer during thermal therapy

2009 ◽  
Vol 34 (8) ◽  
pp. 377-384 ◽  
Author(s):  
Junnosuke Okajima ◽  
Shigenao Maruyama ◽  
Hiroki Takeda ◽  
Atsuki Komiya
Keyword(s):  
Thermal Therapy ◽  
Bioheat Transfer

Studies on the Three-Dimensional Temperature Transients in the Canine Prostate During Transurethral Microwave Thermal Therapy

2000 ◽  
Vol 122 (4) ◽  
pp. 372-379 ◽  
Author(s):  
Jing Liu ◽  
Liang Zhu ◽  
Lisa X. Xu
Keyword(s):  
Three Dimensional ◽  
Blood Perfusion ◽  
Thermal Therapy ◽  
Bioheat Transfer ◽  
Target Tissue ◽  
Urethral Wall ◽  
Theoretical Predictions ◽  
Closed Form Analytical Solution ◽  
Good Agreement

Thermal therapy of benign prostatic hyperplasia requires accurate prediction of the temperature distribution induced by the heating within the prostatic tissue. In this study, the Pennes bioheat transfer equation was used to model the transient heat transfer inside the canine prostate during transurethral microwave thermal therapy. Incorporating the specific absorption rate of microwave energy in tissue, a closed-form analytical solution was obtained. Good agreement was found between the theoretical predictions and in-vivo experimental results. Effects of blood perfusion and the cooling at the urethral wall on the temperature rise were investigated within the prostate during heating. The peak intraprostatic temperatures attained by application of 5, 10, or 15 W microwave power were predicted to be 38°C,41°C, and 44°C. Results from this study will help optimize the thermal dose that can be applied to target tissue during the therapy. [S0148-0731(00)01004-9]

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