2006
DOI: 10.1002/jmri.20605
|View full text |Cite
|
Sign up to set email alerts
|

Real‐time monitoring of radiofrequency ablation of rabbit liver by respiratory‐gated quantitative temperature MRI

Abstract: Purpose:To evaluate the feasibility and precision of magnetic resonance imaging (MRI) thermometry for monitoring radiofrequency (RF) liver ablation in vivo and predicting the size of the ablation zone.Materials and Methods: At 1.5T, respiratory-triggered real-time MR temperature mapping (the proton resonance frequency (PRF) method) was used to monitor RF ablation in rabbit liver (N ϭ 6) under free breathing. The size of the ablation zones, as assessed by histological analyses, was compared with that predicted … Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
1
1
1

Citation Types

2
65
0
1

Year Published

2007
2007
2023
2023

Publication Types

Select...
5
2

Relationship

0
7

Authors

Journals

citations
Cited by 58 publications
(68 citation statements)
references
References 24 publications
2
65
0
1
Order By: Relevance
“…Conventional respiratory gating in animals under general anesthesia and mechanical respiration (93) has been successfully used. Respiratory gating during free breathing has also been used (94), but gating can fail when the respiratory cycle is irregular, leading to motion artifacts and errors in the temperature maps (84). Others have described motion detection and movement registration with navigator echoes for displacements of ex vivo tissue (87).…”
Section: Prf Thermometry and Motionmentioning
confidence: 99%
“…Conventional respiratory gating in animals under general anesthesia and mechanical respiration (93) has been successfully used. Respiratory gating during free breathing has also been used (94), but gating can fail when the respiratory cycle is irregular, leading to motion artifacts and errors in the temperature maps (84). Others have described motion detection and movement registration with navigator echoes for displacements of ex vivo tissue (87).…”
Section: Prf Thermometry and Motionmentioning
confidence: 99%
“…However, not all patients may qualify for breath holds or general anesthesia, and the methods are not suitable for cardiac ablation. Conventional respiratory gating has been used under general anesthesia 8 and free breathing, 9 but gating can fail when the respiratory cycle is irregular, leading to motion artifacts and errors in the temperature maps. 10 Methods for temperature estimation in the presence of motion can be divided into two categories: methods based on a multibaseline strategy and methods based on a referenceless strategy.…”
Section: Introductionmentioning
confidence: 99%
“…In case of RF ablation, the simultaneous use of an RF generator with frequencies between 300 and 500 kHz during imaging decreases image quality (6,18). To date, only noncommercial filters were used to overcome this problem (4,18) or generators with an adapted frequency were employed in animal studies (3,19). Therefore, we performed temperature measurement with a sequential approach: The sedated patients were treated and the energy application was directly followed by temperature mapping, instead of continuously measuring the temperature during the ablation.…”
Section: Discussionmentioning
confidence: 99%
“…REAL-TIME TEMPERATURE MAPPING of magnetic resonance (MR)-guided minimally invasive radiofrequency (RF) ablation has been shown to be feasible both ex vivo (1) and in vivo (2)(3)(4)(5), and has the potential of becoming the gold standard for therapy monitoring of thermoablative therapies. Different MR techniques have been proposed for temperature measurement (6 -10); the most frequently used is the proton resonance frequency shift (PRF) method (11)(12)(13)(14), which is based on a temperature-dependent phase shift allowing for the measurement of temperature changes relative to a baseline image.…”
mentioning
confidence: 99%
See 1 more Smart Citation