image-guided interventions

Transmission Coefficient-Based Monitoring of Microwave Ablation: Development and Experimental Evaluation in Ex Vivo Tissue

Transmission Coefficient-Based Monitoring of Microwave Ablation: Development and Experimental Evaluation in Ex Vivo Tissue
Transmission Coefficient-Based Monitoring of Microwave Ablation: Development and Experimental Evaluation in Ex Vivo Tissue 768 432 IEEE Transactions on Biomedical Engineering (TBME)
We demonstrate the feasibility of monitoring microwave ablation zone growth with the same antennas used for delivering ablation, potentially offering a means for real-time intraprocedural assessment. read more

MRI-Guided Cardiac RF Ablation for Comparing MRI Characteristics of Acute Lesions and Associated Electrophysiologic Voltage Reductions
MRI-Guided Cardiac RF Ablation for Comparing MRI Characteristics of Acute Lesions and Associated Electrophysiologic Voltage Reductions 2560 1427 IEEE Transactions on Biomedical Engineering (TBME)
This study characterizes permanent and transient injury caused by cardiac RF ablation in a preclinical model. Native-contrast MRI features of ablation were investigated in relation to catheter-based electrophysiologic (EP) signals inherently co-registered within the same coordinate frame, and histologically validated. Specifically, we show that bipolar voltage was reduced in the presence of both the permanent T1-derived RF lesion and transient T2-derived edema. These results suggest that these regions are distinct in native-contrast MRI, but not differentiable using bipolar voltage. Intraprocedural MRI visualization distinguishing transient and permanent injury could guide creation of more complete durable RF ablations, reducing arrhythmia recurrence. read more
Development and Phantom Validation of a 3-D-Ultrasound-Guided System for Targeting MRI-Visible Lesions During Transrectal Prostate Biopsy

Development and Phantom Validation of a 3-D-Ultrasound-Guided System for Targeting MRI-Visible Lesions During Transrectal Prostate Biopsy
Author(s)3: Yipeng Hu, Veeru Kasivisvanathan, Lucy A.M. Simmons, Matthew J. Clarkson, Stephen A. Thompson, Taimur T. Shah, Hashim U. Ahmed, Shonit Punwani, David J. Hawkes, Mark Emberton, Caroline M. Moore, Dean C. Barratt
Development and Phantom Validation of a 3-D-Ultrasound-Guided System for Targeting MRI-Visible Lesions During Transrectal Prostate Biopsy 170 177 IEEE Transactions on Biomedical Engineering (TBME)

Three- (3-) and four-dimensional (4D) endorectal ultrasound are now available from most major ultrasound equipment manufacturers, but have been rarely deployed within prostate biopsy guidance systems despite the benefit of…

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