Multiplanar MR temperature-sensitive imaging of cerebral thermal treatment using interstitial ultrasound applicators in a canine model
Kangasniemi, Marko ; Diederich, Chris J ; Price, Roger E ; Stafford, R Jason ; Schomer, Donald F ; Olsson, Lars E LU
; Tyreus, Per Daniel
; Nau, Will H
and Hazle, John D
(2002)
In Journal of Magnetic Resonance Imaging
16(5).
p.31-522
- Abstract
PURPOSE: To study the feasibility of an interleaved gradient-echo, echo-planar imaging (iGE-EPI) sequence for multiplanar magnetic resonance temperature imaging (MRTI) to monitor intracerebral thermal treatment three-dimensionally using multielement ultrasound applicators.
MATERIALS AND METHODS: Transmissible venereal tumor (TVT) fragments were injected into the right cerebral hemisphere of five dogs. Guided by MRI, an interstitial ultrasound applicator was inserted into the tumor or normal brain tissue. The iGE-EPI sequence was used to estimate temperature changes by computing the complex phase-difference induced by temperature-dependent shifts in the proton resonance frequency of water. The thermal dose maps were updated every... (More)
PURPOSE: To study the feasibility of an interleaved gradient-echo, echo-planar imaging (iGE-EPI) sequence for multiplanar magnetic resonance temperature imaging (MRTI) to monitor intracerebral thermal treatment three-dimensionally using multielement ultrasound applicators.
MATERIALS AND METHODS: Transmissible venereal tumor (TVT) fragments were injected into the right cerebral hemisphere of five dogs. Guided by MRI, an interstitial ultrasound applicator was inserted into the tumor or normal brain tissue. The iGE-EPI sequence was used to estimate temperature changes by computing the complex phase-difference induced by temperature-dependent shifts in the proton resonance frequency of water. The thermal dose maps were updated every 6-8 seconds for five to seven image planes during treatment. The results of MRTI were compared with those of post-treatment MRI and histologic analysis.
RESULTS: The multiplanar MRTI monitored temperature and thermal dose distributions in tumor and normal brain tissue over the entire user-defined treatment volume. The ultrasound applicators produced contiguous areas of coagulative necrosis, resulting in 1.5-4.0 cm(3) volumes of tissue necrosis. MRTI-based assessments of thermal-dose distributions were consistent with the results of post-treatment MRI and histologic analysis.
CONCLUSION: Multiplanar MRTI is feasible for measuring necrosing thermal doses during intracerebral thermal delivery by interstitial ultrasound applicators.
(Less)
- author
- Kangasniemi, Marko
; Diederich, Chris J
; Price, Roger E
; Stafford, R Jason
; Schomer, Donald F
; Olsson, Lars E
LU
; Tyreus, Per Daniel
; Nau, Will H
and Hazle, John D
- publishing date
- 2002-11
- type
- Contribution to journal
- publication status
- published
- keywords
- Animals, Brain, Brain Neoplasms, Contrast Media, Dogs, Echo-Planar Imaging, Feasibility Studies, Gadolinium, Imaging, Three-Dimensional, Magnetic Resonance Imaging, Male, Monitoring, Physiologic, Necrosis, Neoplasm Transplantation, Temperature, Ultrasonic Therapy
- in
- Journal of Magnetic Resonance Imaging
- volume
- 16
- issue
- 5
- pages
- 10 pages
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- pmid:12412028
- scopus:0036829966
- ISSN
- 1053-1807
- DOI
- 10.1002/jmri.10191
- language
- English
- LU publication?
- no
- id
- 9f661ac6-88dd-48ad-b378-b2b8f841be51
- date added to LUP
- 2016-08-16 12:12:55
- date last changed
- 2024-01-19 07:38:46
@article{9f661ac6-88dd-48ad-b378-b2b8f841be51,
abstract = {{<p>PURPOSE: To study the feasibility of an interleaved gradient-echo, echo-planar imaging (iGE-EPI) sequence for multiplanar magnetic resonance temperature imaging (MRTI) to monitor intracerebral thermal treatment three-dimensionally using multielement ultrasound applicators.</p><p>MATERIALS AND METHODS: Transmissible venereal tumor (TVT) fragments were injected into the right cerebral hemisphere of five dogs. Guided by MRI, an interstitial ultrasound applicator was inserted into the tumor or normal brain tissue. The iGE-EPI sequence was used to estimate temperature changes by computing the complex phase-difference induced by temperature-dependent shifts in the proton resonance frequency of water. The thermal dose maps were updated every 6-8 seconds for five to seven image planes during treatment. The results of MRTI were compared with those of post-treatment MRI and histologic analysis.</p><p>RESULTS: The multiplanar MRTI monitored temperature and thermal dose distributions in tumor and normal brain tissue over the entire user-defined treatment volume. The ultrasound applicators produced contiguous areas of coagulative necrosis, resulting in 1.5-4.0 cm(3) volumes of tissue necrosis. MRTI-based assessments of thermal-dose distributions were consistent with the results of post-treatment MRI and histologic analysis.</p><p>CONCLUSION: Multiplanar MRTI is feasible for measuring necrosing thermal doses during intracerebral thermal delivery by interstitial ultrasound applicators.</p>}},
author = {{Kangasniemi, Marko and Diederich, Chris J and Price, Roger E and Stafford, R Jason and Schomer, Donald F and Olsson, Lars E and Tyreus, Per Daniel and Nau, Will H and Hazle, John D}},
issn = {{1053-1807}},
keywords = {{Animals; Brain; Brain Neoplasms; Contrast Media; Dogs; Echo-Planar Imaging; Feasibility Studies; Gadolinium; Imaging, Three-Dimensional; Magnetic Resonance Imaging; Male; Monitoring, Physiologic; Necrosis; Neoplasm Transplantation; Temperature; Ultrasonic Therapy}},
language = {{eng}},
number = {{5}},
pages = {{31--522}},
publisher = {{John Wiley & Sons Inc.}},
series = {{Journal of Magnetic Resonance Imaging}},
title = {{Multiplanar MR temperature-sensitive imaging of cerebral thermal treatment using interstitial ultrasound applicators in a canine model}},
url = {{http://dx.doi.org/10.1002/jmri.10191}},
doi = {{10.1002/jmri.10191}},
volume = {{16}},
year = {{2002}},
}