Extended Transmit and HIFU

Enabling Your Research and Development in Focused Ultrasound

 

 

Verasonics’ Extended Transmit option and HIFU configuration deliver exceptional sustained transmit capabilities for advanced research and therapy applications.

The Extended Transmit option uses an internal power supply with a push capacitor to enable extended transmit bursts up to a few milliseconds, while the HIFU configuration expands those capabilities with an external power supply for sustained, high-power transmit performance across a wide range of burst durations and frequencies.

Together, these features enable users to combine therapy or radiation-force methods with conventional imaging or Doppler modes in a single system, enabling real-time image guidance and monitoring for demanding interventional and therapeutic workflows.

Picture of the Vantage NXT 256 system with the HIFU external power supply

The Vantage NXT 256 system with the HIFU external power supply

Vantage NXT Systems are Available in Three Transmit Power Options:

Conventional Imaging Pulses

Conventional imaging modes can be interleaved as desired between extended transmit or HIFU sequences, using different transmit voltage levels, and utilizing the full range of features and performance provided by Verasonics Systems for echo imaging and Doppler modalities. This enables the user to employ image guidance and monitoring of interventional and therapeutic techniques in real time.

The Vantage NXT power supply provides an extremely high precision, high voltage power supply from 3.0 to 192 V p-p

Maximum burst length: a few microseconds (see notes)1,2

Applications

B-mode
Doppler
NDT/NDE
Conventional and non-conventional imaging
Ultrafast (Plane Wave)

Extended Transmit Option

The Extended Transmit Option (also called “extended burst” or “push”) provides an independently regulated power supply and energy-storage capacitor to sustain extended transmit bursts, provided that enough time is allowed between transmissions to recharge the capacitor from the internal supply. In the Vantage NXT mid-frequency configuration, Extended Transmit is available from 250 kHz to 18 MHz, while in the Vantage NXT high-frequency configuration, this feature can be used from 1 MHz to 18 MHz.

Vantage NXT independent internal power supply with push capacitor

Long pulse-tolerant circuitry

Maximum burst length: a few milliseconds (see note)1

The Vantage NXT Arbitrary Waveform Package is a purchasable option that includes the Extended Transmit option

Applications

ARFI
Shear Wave Elastography
Drug Delivery
Tissue Manipulation
Moderate Tissue Heating
Coded Excitation
Guided Wave NDT
Particle Manipulation

HIFU Configuration – High Energy Delivery for Ablative Modalities or Long-Duration Pulses

With the “HIFU Configuration”, circuit board provisions for additional thermal dissipation and connection of an external transmit power supply are added, and continuous transmit output power levels of up to 1000 Watts can be supported for a wide range of burst durations and repetition intervals, at any frequency in the 250 kHz to 8.0 MHz range. Outside the fully supported frequency band, HIFU operation is possible but with reduced performance. The HIFU configuration supports all imaging modalities available in the standard system, including radiation force methods, using conventional imaging arrays. The HIFU Configuration (with external power supply) is available on the Vantage NXT 256, the Vantage NXT 128, and the Vantage NXT 64 LE models.

1200 W programmable external power supply standard

The Extended Transmit License is included

Enhanced circuitry for high currents and very long pulses

Maximum burst length: 10 Megacycles (107 cycles)

Total Average RF output power: 1000 W (with 1200 W supply)

Available on Vantage NXT 256, Vantage NXT 128, and Vantage NXT 64LE mid-frequency configurations only

Applications

Thermal Ablation
BBB Opening
Neuromodulation
Cavitation
Particle Manipulation
ARFI
Coded Excitation
Shear Wave Elastography
Moderate Tissue Heating
Drug Delivery
Guided Wave NDT

1 Maximum achievable pulse length and pulse power depend on a number of factors, including operating voltage, effective frequency, number of active channels, acceptable voltage droop, transducer element impedance, etc. Software limit testing permits derated operation outside stated specifications.

2 Maximum allowable burst length without Extended Transmit option is a few microseconds. Excessive voltage droop may prevent bursts longer than about 10 cycles, under some conditions.

Transmitter Circuit

Conventional
Imaging Pulses		 Extended Transmit
Option		 External Power Supply
(HIFU)
Voltage Range (VPeak) 3.0 to 192 V p-p 3.0 to 192 V p-p 3.0 to 192 V p-p

Power Supply Capabilities

Conventional
Imaging Pulses		 Extended Transmit
Option		 External Power Supply (HIFU)
Maximum Average Power 90 W @ 60 Vp (Any Load)
45 W @ 20 Vp (Any Load)
36 W @ 96 Vp (Any Load)		 90 W @ 60 Vp (Any Load)
45 W @ 20 Vp (Any Load)
36 W @ 96 Vp (Any Load)		 1000 W*
Pulse Length Range
(order of magnitude)		 up to a few microseconds (μs) few microseconds (μs) up to 2 ms ms to seconds (s)

* Standard QPX6OODP power supply provided. For cavitation methods requiring high PRF and long bursts, the Vantage NXT HIFU configuration with an external power supply is required.

Examples

Conventional
Imaging Pulses		 Extended Transmit
Option		 External Power Supply (HIFU)
10 MHz, 4 cycles, 3000 Hz PRF (Doppler) yes yes yes
5 MHz, 2,000 cycles, 25 Hz PRF (Shear Wave “push”) no yes yes
3 MHz, 1,000,000 cycles, 1 Hz PRF (HIFU ablation) no no yes

Download the Vantage NXT System Transmit Options Data Sheet

Learn about Focused Ultrasound Options