Pilot in vivo studies on transcutaneous boiling histotripsy in porcine liver and kidney.

Abstract:

:Boiling histotripsy (BH) is a High Intensity Focused Ultrasound (HIFU) method for precise mechanical disintegration of target tissue using millisecond-long pulses containing shocks. BH treatments with real-time ultrasound (US) guidance allowed by BH-generated bubbles were previously demonstrated ex vivo and in vivo in exposed porcine liver and small animals. Here, the feasibility of US-guided transabdominal and partially transcostal BH ablation of kidney and liver in an acute in vivo swine model was evaluated for 6 animals. BH parameters were: 1.5 MHz frequency, 5-30 pulses of 1-10 ms duration per focus, 1% duty cycle, peak acoustic powers 0.9-3.8 kW, sonication foci spaced 1-1.5 mm apart in a rectangular grid with 5-15 mm linear dimensions. In kidneys, well-demarcated volumetric BH lesions were generated without respiratory gating and renal medulla and collecting system were more resistant to BH than cortex. The treatment was accelerated 10-fold by using shorter BH pulses of larger peak power without affecting the quality of tissue fractionation. In liver, respiratory motion and aberrations from subcutaneous fat affected the treatment but increasing the peak power provided successful lesion generation. These data indicate BH is a promising technology for transabdominal and transcostal mechanical ablation of tumors in kidney and liver.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Khokhlova TD,Schade GR,Wang YN,Buravkov SV,Chernikov VP,Simon JC,Starr F,Maxwell AD,Bailey MR,Kreider W,Khokhlova VA

doi

10.1038/s41598-019-56658-7

subject

Has Abstract

pub_date

2019-12-27 00:00:00

pages

20176

issue

1

issn

2045-2322

pii

10.1038/s41598-019-56658-7

journal_volume

9

pub_type

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