Click here to open and review this file: Use of a RF Shield During MRI, October 2014
Christopher P Favazza
Deirdre M King
heidi a Edmonson
Joel P Felmlee
Phillip J Rossman
nicholas J Hangiandreou
Robert E Watson
Krzysztof R Gorny
Department of Radiology,
Mayo clinic, Rochester, MN, USA
___________________________________________________________________________________________Click Click here to open and review this file: RF Shield Assessment Report, April 2010
Emanuel Kanal, MD, FACR, FISMRM, AANG
Director, Magnetic Resonance Services
Professor of Radiology and Neuroradiology
Department of Radiology
University of Pittsburgh Medical Center
_________________________________________________________________________________________________ Click here to open and review this file: Accusorb MRI Trial, March 2008
Karen Smith - MRI Superintendent
Edith Cavell Hospital MRI Unit
We usually do at least one abdominal case per day, which are usually geriatric patients who have great difficulty raising their arms above their head for 15 to 20 minutes for the exam. The bilateral arm sleeves prove time and time again to be flawless and allow us to decrease our phase FOV on some of our sequences by at least 20% with no residual artifact from the Accusorb sleeves!
Our elbow positioning (swimmers or superman) proves to be very straining on the patient as well as increases the likelihood of motion due to discomfort. We now do our elbows by the patients’ side using the same coil, but wrapping the medial part of the body with the Accusorb torso/leg sleeve. We do not alter our parameters. It is much more comfortable for the patient and with fewer repeats because the patients are less prone to motion.
We had a patient last week for a MRI of their right knee who presented with a locked knee in a 45 degree angle. The patient did not fit any of the conventional coils. We do not have a suitable small flex coil at this site that could have solved the problem. Out of options, the patient was positioned in a right decubitus position using GE's body-array coil. We then wrapped the other leg in Accusorb to basically "make it disappear" from the situation. The resulting exam was very successful, images clear, and patient serviced where otherwise the exam would not have been successful!
MRI Team Leader
The Aberdeen Hospital
New Glasgow, Nova Scotia
_________________________________________________________________________________________________ This is just a quick note to thank you for providing us with the Accusorb RF shields. We have been using them for two months now and they are quickly becoming indispensable. Being a pediatric MR site, we do not have the luxury of large FOVs and slice thickness and must be very creative with our choice of coils and scanning parameters to win back some of the SNR lost because of our small subjects.
The Accusorb system allows us to use smaller phase FOVs in situations that we could not use before due to wrap issues. We can then use the time gained to add an extra NEX or two to squeeze as much SNR out of the scan possible, or equally important, to shorten a scan with an uncooperative child while still retaining basically the same quality picture with less movement.
We are using it in with coronal abdomen BH, cardiac MRA imaging as well as long bone imaging where we can make the opposing limb disappear from our images while using small FOV in all three planes. While imaging elbows, we have a choice of positioning based on patient comfort and can use small phase FOVs without fear of wrapping the body into any of our images.
We recently had an exam with a patient who because of a very painful ulnar lesion, was unable to extend her arm or fit it into our standard extremity coils. We wrapped her body in the RF blanket and put her in the magnet on her back with the elbow simply lying on her abdomen. This was the only position she could tolerate a 25 minute exam. With her body wrapped in the RF shields, it effectively disappeared, allowing us to image the elbow with high res. small FOV images and no interference from the body whatsoever. The pictures helped in diagnosing and mapping out surgery in a sub optimal situation for a patient who really needed quality imaging.
We are still experimenting with the RF blankets, and will undoubtedly come up against unique situations like this again. Thanks again for a very MR useful product!
Barry Smith MRT R, MR
Charge Technologist MRI
Children's Hospital of Eastern Ontario
_____________________________________________________________________________________________________________________________ “We have found the RF blankets invaluable for several types of scans. By wrapping the opposite lower extremity when scanning a knee, calf, thigh, foot or ankle, we can use small FOV's without worrying about phase wrap. Similarly, in the chest or abdomen studies we wrap both arms with the small RF blankets for those patients that are unable to hold their arms over their head. This allows for shorter breath-hold scanning, which in some cases for the elderly and/or extremely ill, means the completion of a successful scan. We really do use your product frequently!”
Southern Tier Imaging
Johnson City, New York
_________________________________________________________________________________________________ We have been using an Accusorb RF Blanket for about two years. Primarily, we use the blanket for orthopedic cases in our 1.5 Tesla scanners. The blanket will also work well for Angio cases if the Coronal plane is the desired view for the MRA. We have been using two versions of Accusorb. One is a large 36” x 36” blanket shaped device. The other are a pair of Arm Shields, which can also be used to cover the legs of smaller patients (children).
All of our testing of this unique device has been on the 1.5 Tesla GE magnet with extremely encouraging results. Use of Accusorb (whether in the blanket or arm forms) can help to lessen the time of sequences by eliminating the need to add No Phase Wrap to the sequence protocol. The device totally removes the non imaged limb from view on the exam, and from the sequences. This feature is especially necessary when trying to image a hand on a young person who is in the supine position, with the hand down by the side, next to the body. In this case, one would place Accusorb over the hips, flank, abdomen of the patient. Doing this will eliminate wrap from the side of the body closest to the hand or wrist that is being imaged. Likewise, for the imaging of the unilateral knee, Accusorb provides the technologist with the assurance that there will be no wrapping artifact from the non-imaged knee.
I have included some images that prove the above situations to be accurate. Any device that will consistently reduce the time factor in orthopedic/body MR exams is definitely a most valuable addition to any MR department. Click here to view the Children’s Hospital Images
... and more recently!
We are so loving the RF Blanket for the 3T [Siemens]. For extremities, the use of the Blanket is absolutely necessary if using the 3T. I am sending you some images with and without the Blanket. More than ever, even more so than for the 1.5, when using the 3T for extremities, the RF Blanket is an answer to our prayers. Time is cut down dramatically!!!. I will try to figure out how much exactly, but it is more than just significant. Thanks for all of your help with giving us this wonderful device. I am going to call my associates to tell them how we feel about the absolute need for RF Blankets for the 3T.
[Note: Kevin’s scans were used in the application for the knee found on the literature page on this site]
Kevin Dewey, RT (MR)
We have been using this product for more than 7 years now. These RF shields have been very useful in getting rid of the anatomy not of interest. Not having wrapping from adjacent anatomy on images is very important in clinical MRI. Accusorb RF shielding products prevent the technologist from putting patients in uncomfortable positions to avoid wrapping of anatomy. It is very simple to use just by covering the areas that you do not wish to see and anatomy disappears. This saves lots of energy and time for technologist.”
Edison, New Jersey