Acoustic Contact Liquid - Profound Sonalleve MR-HIFU Instructions For Use Manual

3. System overview > 3.2. Patient accessories
HIFU Coil, pad and strap.
Various types of pads for patient comfort.
Disposable (single use) gel pads for the ultrasound window.
Gel pad holder, to prevent the gel pad from slipping horizontally.
IV Stand (optional).
Headphones.
Table Top Plate.
Ultrasound Window Cover.
NOTICE
The vacuum cushion provided with the Sonalleve MR-HIFU system is only intended for use in MR-
HIFU, not in diagnostic clinical imaging.
To order additional consumables (such as gel pads) or replacements for accessories that are
provided with the Sonalleve MR-HIFU system, contact your local Profound Medical representative.
The hospital must provide the following items required in HIFU treatment:
Depilation equipment.
IV tubes.
Foley catheter, urine bag with a 2 m extension hose.
Ear plugs.
Patient sheet or blanket.
Thermometer. The accuracy of electronic rectal thermometers is usually better than ±0.2 °C,
which is sufficient for this purpose. Oral or ear thermometers are often less reliable and are
therefore not recommended.
Disposable absorbing sheets for use under the mattress and under the patient.
Compression stockings to reduce the risk of blood clots and Deep Vein Thrombosis (DVT) due
to prolonged immobilization of the patient are optional but highly recommended.
Degassed acoustic contact liquid (see below).

3.2.1. Acoustic contact liquid

Pure water or a mixture of ultrasound gel and water is used as a coupling medium to close any air
gaps between the patient contact and the patient.
The water in the acoustic contact liquid used in MR-HIFU treatments must meet the following
requirements:
Pure water, preferably distilled.
Hard water (with high mineral content) should be avoided.
Microbiologically clean.
Contains no chemicals or particles that can cause degradation of the MR signal, susceptibility
effects or localized heating of skin or the inner margin of the subcutaneous fat layer in the MR
scanner's RF field or in the ultrasound field.
Instructions for Use
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