Comparison of Two Electromagnetic Navigation Systems For CT-Guided Punctures: A Phantom Study.
Rofo
; 188(5): 470-8, 2016 May.
Article
em En
| MEDLINE
| ID: mdl-27074422
ABSTRACT
PURPOSE:
We compared the targeting accuracy and reliability of two different electromagnetic navigation systems for manually guided punctures in a phantom. MATERIALS ANDMETHODS:
CT data sets of a gelatin filled plexiglass phantom were acquired with 1, 3, and 5âmm slice thickness. After paired-point registration of the phantom, a total of 480 navigated stereotactic needle insertions were performed manually using electromagnetic guidance with two different navigation systems (Medtronic Stealth Station AxiEM; Philips PercuNav). A control CT was obtained to measure the target positioning error between the planned and actual needle trajectory.RESULTS:
Using the Philips PercuNav, the accomplished Euclidean distances were 4.42â±â1.33âmm, 4.26â±â1.32âmm, and 4.46â±â1.56âmm at a slice thickness of 1, 3, and 5âmm, respectively. The mean lateral positional errors were 3.84â±â1.59âmm, 3.84â±â1.43âmm, and 3.81â±â1.71âmm, respectively. Using the Medtronic Stealth Station AxiEM, the Euclidean distances were 3.86â±â2.28âmm, 3.74â±â2.1âmm, and 4.81â±â2.07âmm at a slice thickness of 1, 3, and 5âmm, respectively. The mean lateral positional errors were 3.29â±â1.52âmm, 3.16â±â1.52âmm, and 3.93â±â1.68âmm, respectively.CONCLUSION:
Both electromagnetic navigation devices showed excellent results regarding puncture accuracy in a phantom model. The Medtronic Stealth Station AxiEM provided more accurate results in comparison to the Philips PercuNav for CT with 3âmm slice thickness. One potential benefit of electromagnetic navigation devices is the absence of visual contact between the instrument and the sensor system. Due to possible interference with metal objects, incorrect position sensing may occur. In contrast to the phantom study, patient movement including respiration has to be compensated for in the clinical setting. KEY POINTS â¢âCommercially available electromagnetic navigation systems have the potential to improve the therapeutic range for CT guided percutaneous procedures by comparing the needle placement accuracy on the basis of planning CT data sets with different slice thickness. Citation Format â¢âPutzer D, Arco D, Schamberger B etâal. Comparison of Two Electromagnetic Navigation Systems For CT-Guided Punctures A Phantom Study. Fortschr Röntgenstr 2016; 188 470â-â478.
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Base de dados:
MEDLINE
Assunto principal:
Biópsia por Agulha
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Tomografia Computadorizada por Raios X
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Técnicas Estereotáxicas
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Ablação por Cateter
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Imagens de Fantasmas
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Fenômenos Eletromagnéticos
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Biópsia Guiada por Imagem
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article