Radiofrequency thermal ablation

The role of MR imaging in guiding and monitoring tumor therapy

Sherif Gamal Nour, Jonathan S. Lewin

Research output: Contribution to journalArticle

Abstract

Performing RFA procedures under MR imaging involves two distinct processes: interactive guidance of the RF electrode into the targeted tumor and monitoring the effect of therapy. The justification for using MR imaging for electrode guidance is quite similar to its use to guide biopsy and aspiration procedures, where MR imaging offers advantages related to superior soft tissue contrast, multiplanar capabilities, and high vascular conspicuity that facilitate safe and accurate guidance in selected lesions. The major contribution of MR imaging to thermal ablation procedures is its ability to monitor tissue changes associated with the heating process instantaneously, an attribute that is not paralleled by any other currently available imaging modality. Such ability facilitates a controlled approach to ablation by helping to detect inadequately treated tumor foci for subsequent interactive repositioning of the RF electrode during therapy. As such, MR imaging guidance and monitoring enable treatment of the entire tumor on a single-visit basis while avoiding undue overtreatment and preserving often critically needed organ function. Although knowledge of interventional MR imaging concepts and familiarity with its technology and with the related safety issues are indispensable for interventional radiologists attempting thermal ablation procedures in the MR imaging environment, understanding the tissue basis of necrosis imaging is becoming an essential part of the knowledge base for the larger sector of general radiologists who are required to interpret the follow-up MR imaging scans of the increasing number of thermal ablation patients.

Original languageEnglish (US)
Pages (from-to)561-581
Number of pages21
JournalMagnetic Resonance Imaging Clinics of North America
Volume13
Issue number3
DOIs
StatePublished - Aug 2005

Fingerprint

Hot Temperature
Electrodes
Aptitude
Neoplasms
Knowledge Bases
Needle Biopsy
Therapeutics
Heating
Blood Vessels
Necrosis
Technology
Safety
Radiologists

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

Cite this

Radiofrequency thermal ablation : The role of MR imaging in guiding and monitoring tumor therapy. / Nour, Sherif Gamal; Lewin, Jonathan S.

In: Magnetic Resonance Imaging Clinics of North America, Vol. 13, No. 3, 08.2005, p. 561-581.

Research output: Contribution to journalArticle

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