An study of ultrasonic monitoring imaging of microwave ablation based on Nakagami statistic parameter / 生物医学工程学杂志
Journal of Biomedical Engineering
;
(6): 371-378, 2019.
Article
in Chinese
| WPRIM
| ID: wpr-774196
ABSTRACT
This paper explored the feasibility of using ultrasonic Nakagami statistic parameter imaging to evaluate the thermal lesion induced by microwave ablation (MWA) in porcine models. In this paper, thermal lesions were induced in livers and kidneys in 5 swines using a clinical MWA system. During this treatment progress, ultrasonic radiofrequency (RF) data were collected. The dynamic changes of Nakagami parameter in the thermal lesion were calculated, and the ultrasonic B-mode images and Nakagami images were reconstructed simultaneously. The contrast-to-noise ratio (CNR) between the thermal lesion and the surrounding normal tissue was calculated over the MWA procedure. After MWA, a bright hyperechoic region appeared in the ultrasonic Nakagami image as an indicator of the thermal lesion and this bright spot enlarged with lesion development during MWA exposure. The mean value of Nakagami parameter in the liver and kidney increased from 0.78 and 0.79 before treatment to 0.91 and 0.92 after treatment, respectively. During MWA exposure, the mean values of CNR calculated from the Nakagami parameter increased from 0.49 to 1.13 in the porcine liver and increased from 0.51 to 0.85 in the kidney, which were both higher than those calculated from the B-mode images. This study on porcine models suggested that the ultrasonic Nakagami imaging may provide an alternative modality for monitoring MWA treatment.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Radio Waves
/
Swine
/
Diagnostic Imaging
/
Ultrasonography
/
Radiofrequency Ablation
/
Kidney
/
Liver
/
Microwaves
Type of study:
Diagnostic study
/
Prognostic study
Limits:
Animals
Language:
Chinese
Journal:
Journal of Biomedical Engineering
Year:
2019
Type:
Article
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