Question:

Which of the following is false in regard to MR-guided Focused Ultrasound (MRgFUS)?
1. Contrast MRI is used for patient selection.
2. Energy pulses are referred to as sonications.
3. T2W images are used to deliver sonications.
4. Thermal maps are used for monitoring.
5. Post treatment contrast study is not required.





Answer:

The correct answer for the question "Which of the following is false in regard to MR-guided Focused Ultrasound (MRgFUS)?" is:

5. Post treatment contrast study is not required.



Explanation
1. Contrast MRI is used for patient selection. [To evaluate the fibroid`s viability more fully, and as part of our screening routine for MRgFUS, T1-weighted MR images (T1WIs) with contrast were acquired.]

2. Energy pulses are referred to as sonications. [The operator uses the integrated system to deliver accurate energy pulses (termed sonications) to a location identified on anatomical T2-weighted MRI images.]

3. T2W images are used to deliver sonications. [The heat generated during the course of these sonications is monitored using T2Wimages acquired in real-time.]

4. Thermal maps are used for monitoring. [The heat generated during the course of these sonications is monitored using T2Wimages acquired in real-time.]

5. Post treatment, contrast study is done to assess NPV [At the end of the treatment, the results are evaluated by the non-perfused regions on T1-weighted contrast enhanced images.]



From the manuscript:
MRgFUS treatment of uterine fibroid in a nulliparous woman with acute retention of urine
Radiology Case. 2012 Feb; 6(2):1-8


This article belongs to the OB/GYN section.




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From the manuscript

MRgFUS treatment of uterine fibroid in a nulliparous woman with acute retention of urine

Free full text article: MRgFUS treatment of uterine fibroid in a nulliparous woman with acute retention of urine

Abstract
Uterine fibroids are the most common tumors of the female reproductive tract. Although most fibroids are asymptomatic, about 25% are associated with symptoms that can have a significant impact on patient`s quality of life, including prolonged or excessive menstrual bleeding, pelvic pain or bulkiness, dyspareunia, increased urinary frequency, and infertility. Various treatment options available for symptomatic uterine fibroids include hysterectomy, myomectomy (abdominal or laparoscopic), uterine artery embolization, MR-guided Focused Ultrasound (MRgFUS), and hormonal therapy, which also is sometimes used as adjuvant to other therapies. MRgFUS is a non-invasive treatment approach for symptomatic uterine fibroids. The following case report demonstrates successful treatment of a fibroid that is hyper-intense on T2WIs by MRgFUS with immediate alleviation of pressure symptoms on the urinary bladder.






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