Philips MR-guided High Intensity Focused Ultrasound with Direct Skin Cooling
The method is quicker and comfortable compared to the conventional procedures currently done for the treatment of uterine fibroids such as hysterectomy, myomectomy or uterine artery embolization. The procedure is usually done on an outpatient basis with the patient leaving the hospital on the same day. The patient may be kept for observation for another 24 hours.
The procedure is performed in three stages:
The patients are evaluated using three dimensional MR imaging which is used to determine if the patient is eligible for treatment. If the patient satisfies the criteria for treatment, the condition is evaluated and the treatment time is planned accordingly. The patient arrives at the stipulated time and is placed in a prone position on the MRI table. The device is positioned correctly so as to achieve acoustic coupling and the regions of treatment are marked using the MR images. The patient may also be given IV fluids or conscious sedatives. A test delivery of a non lethal dose of ultrasound waves may also be focused to ensure accuracy.
High-intensity ultrasound waves are focused onto the fibroids which elevates its temperature and causes the tissue to coagulate. The process is done in multiple sonications with the number and duration depending on the size and extent of fibroids. The process will be closely monitored and controlled by MR imaging and feedback to confirm the accuracy and effectiveness of the treatment. In case of any discomfort, the patient can stop the process through a hand held device button.
At the end of treatment, contrast enhanced MR imaging is used to assess the effectiveness of the procedure. These images are used to determine the Non-Perfused Volume (NPV) of the fibroid, which is the volume of tissue that is non-viable (has no blood flow to it)All products in the category Magnetic resonance