Improved MR thermometry for laser interstitial thermotherapy
نویسندگان
چکیده
منابع مشابه
Evaluation of Temperature Rise and Thermal Lesion Dimensions in Liver Laser Interstitial Thermotherapy
Introduction: Laser interstitial thermotherapy (LITT) is an internal ablation therapy method consisting of a percutaneous or intraoperative insertion of laser fibers directly into the liver tumor with maximum diameter of 5 cm. In this treatment method, there isn’t any general information about the relationship between increasing the exposure power, coagulation and carboniza...
متن کاملMRI thermometry in phantoms by use of the proton resonance frequency shift method: application to interstitial laser thermotherapy.
In this work the temperature dependence of the proton resonance frequency was assessed in agarose gel with a high melting temperature (95 degrees C) and in porcine liver in vitro at temperatures relevant to thermotherapy (25-80 degrees C). Furthermore, an optically tissue-like agarose gel phantom was developed and evaluated for use in MRI. The phantom was used to visualize temperature distribut...
متن کاملMR-guided laser induced thermotherapy (LITT) of liver metastases
Purpose To demonstrate clinical findings and imaging criteria of side-effects and complications immediatly and delayed after the MR-guided LITT for the treatment of liver metastases. Material and methods In a time frame of 6 years 411 patients were prospectively treated with MR-guided LITT for liver metastases. Between June 1993 and March 1999 a total of 2440 laser applications were performed t...
متن کاملTransurethral prostate thermotherapy: filtering the bowel motion during MR-thermometry processing
Background/introduction Magnetic resonance imaging (MRI)-guided transurethral ultrasound therapy is a minimally-invasive image-guided treatment for localized prostate cancer offering precise targeting of tissue within the gland. The accuracy of MR thermometry is critical for precise on-line feedback control as well as for monitoring potential thermal injury of surrounding tissues, especially th...
متن کاملSSFP-based MR thermometry.
Of the various techniques employed to quantify temperature changes by MR, proton resonance frequency (PRF) shift-based phase-difference imaging (PDI) is the most accurate and widely used. However, PDI is associated with various artifacts. Motivated by these limitations, we developed a new method to monitor temperature changes by MRI using the balanced steady-state free precession (balanced-SSFP...
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ژورنال
عنوان ژورنال: Lasers in Surgery and Medicine
سال: 2019
ISSN: 0196-8092,1096-9101
DOI: 10.1002/lsm.23049