Thursday, December 30, 2010

Ferromagnetic Detector for Safe MRI Practice

Tags: Ferromagnetic Detector, MRI Safety

Tuesday, May 11, 2010

MRI Tragedy

Another MRI tragedy that leads to the death of a field engineer...

Tags: GE Medical Systems, Signa HDX 1.5T, blower motor

Sunday, May 2, 2010

Brain MRI (Imaging Planes)

Tags: Brain MRI, imaging plane, bicommissural line, fastigium, 4th ventricle, sella turcica, corpus callosum

P.M. Parizel et al. Magnetic Resonance Imaging of the Brain. In: P. Reimer et al. (eds.), Clinical MR Imaging. Springer-Verlag: Berlin Heidelberg, 2010; 108-194.

Friday, April 9, 2010

Cardiac Pacemaker Designed for MRI Safety

Tags: MRI, cardiac pacemaker, implantable cardiac device, SureScan, Advisa MRI Pacemaker, EnRhythm MRI Pacemaker, CapSureFix MRI Lead

Cardiac Pacemaker & MRI

Tags: MRI, cardiac pacemaker, implantable cardiac device, EMI, electromagnetic interference

Tuesday, March 30, 2010

Ax Flies at MRI Fire

A firefighter chopping a hole in the roof of a burning medical building Sunday had his ax ripped from his hands and through the roof by the force of a magnet in an MRI machine below...

Tags: MRI fire, firefighter, Ax

Sunday, March 28, 2010

MRI Safety Alert

Magnet failed to quench as the quench button was pressed...

Tags: Magnet quench, quench button, fire

Saturday, March 13, 2010

SEGMENT (Medical Image Analysis Software) for Mac OS X

Click here for details.

Tags: Cardiac MRI, application software, SEGMENT

Friday, February 26, 2010

No Fear MRI

Useful information for both MRI techs & patients: No Fear MRI

Tags: Claustrophobia, successful MRI

Tuesday, February 2, 2010

Dynamic Susceptibility Contrast (DSC)

(Click on image to enlarge)

Tags: Cerebral perfusion, dynamic susceptibility contrast, DSC, signal-time curve, concentrative-time curve, arterial input function, AIF, relCBV, rCBF, MTT

Swanson SD. MR Methods to Measure Cerebral Perfusion. In: MR Imaging in White Matter Diseases of the Brain and Spinal Cord. Springer Berlin Heidelberg, 2005; 83-91.

Wednesday, January 27, 2010

New Blood Pool Contrast Agent - Ablavar


There have been quite a number of discussions recently on "Ablavar" - the newly FDA-approved blood pool contrast agent for use in magnetic resonance angiography (MRA) to evaluate aortoilac occlusive disease (AIOD) in adults with known or suspected peripheral vascular disease (PVD). Is anyone out there who has experience in the clinical use of Ablavar willing to share with us the safety and efficacy of this blood pool contrast agent? MRA images using Ablavar, if available, will be awesome and most welcome. The images can be sent to me through email and I'll post them up here for sharing.

Illustrated below is one of the clinical examples of the applicaton of blood pool contrast agent from



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I will update any changes to the above here in this post, which can be found in the entry labelled with "DISCLOSURE".

Wednesday, January 20, 2010

T1 Values in Infarcted & Noninfarcted Myocardium for Magnevist & MultiHance

Tags: Relaxation time, T1, Inversion time, TI, null point, Gadopentetate, Gadobenate, Magnevist, MultiHance, infarcted myocardium, noninfarcted myocardium

Schlosser et al. Myocardial infarct: depiction with contrast-enhanced MR imaging--comparison of gadopentetate and gadobenate. Radiology (2005) vol. 236 (3) pp. 1041-6.

Null Point for Late Gd Enhancement

Tags: Inversion Time, TI, Gadolinium, Late Gadolinium Enhancement, LGE

Yamrozik JA, Meister J, Geetha R, et al. Combined effects of Gadolinum dosage and delay on myocardial nulling. Journal of Cardiovascular Magnetic Resonance (2007) 9, 477–491.

Tuesday, January 19, 2010

Meniscal Tears

(Click on image to enlarge)

Tags: Meniscus, knee, full-thickness tear


Monday, January 18, 2010

Partial Tears of Achilles Tendon

(Click on image to enlarge)

Tags: Achilles tendon, ankle, partial tears


Sunday, January 17, 2010

New Standard for the Design of MRI Suite

Conceptual Layout of an MRI Suite in line with the 4-Zone Principle Affirmed by the American College of Radiology

(Click on image to enlarge)

(Click on image to enlarge)

An indispensable guide to the design of a contemporary MRI suite (with all the MRI safety requirements properly addressed) can be obtained from the U.S. Department of Veterans Affairs.

Tags: MRI safety, layout plan, 4-zone principle, MRI suite, ferromagnetic screening


Monday, January 11, 2010

Musculoskeletal MRI 101 (II/II)

Tags: Meniscal tears, FSE, echo train length, ETL, echo spacing, T2 decay, signal jump, image blur, magnetization transfer, k-space, artefact

Tuesday, January 5, 2010

FDA Warns of Sandbags in MRI Suites

Sandbags that contain metal shavings could pose a hazard in MRI suites, according to an alert issued by the U.S. Food and Drug Administration (FDA).

The FDA issued its warning after a report of a case in which healthcare staff placed a sandbag on a patient's groin to help facilitate hemostasis after a femoral artery puncture procedure. As the study began, the sandbag was pulled into the MRI scanner, damaging the system. The patient was not injured in the incident.

Staff had assumed that the sandbag contained only sand, but upon further investigation it was found to contain ferromagnetic shavings and iron pellets. The sandbag was originally purchased for the hospital's physical therapy department and shouldn't have been brought into the MRI suite, according to the FDA.

The FDA suggests that sites purchase only sandbags that are labeled with the MR Safe or MR Conditional icon. Ferromagnetic sandbags should be appropriately labeled as MR Unsafe to ensure that they aren't brought into the MRI suite, and unlabeled sandbags should not be brought into MRI rooms.

In addition, MRI staff should be educated to screen patients for ferromagnetic objects and should remove patients' blankets and sheets to search for objects. Patient records should be checked before MRI scans for recent procedures that may have required the use of a sandbag, and signs should be placed in visible areas outside the MRI room reminding staff to check for ferromagnetic objects.

Tags: MR safe, MR conditional, sandbag, ferromagnetic


Sunday, January 3, 2010

Encompass Group Voluntarily Recalls Thermoflect Product Line

FOR IMMEDIATE RELEASE – December 26, 2009 – McDonough, GA – Jea R. Gackowski, Encompass Group Corporate Compliance Officer announced today the company is voluntarily recalling the Thermoflect product line for relabeling regarding its use in the MR (Magnetic Resonance) environment.

"We are voluntarily recalling the product line from use in the Magnetic Resonance (MR) environment," Gackowski said. "We are requesting that the Thermoflect blankets and other products not be used in MR conditional or MR compatible environments. We are in the process of sending labels to our customers to be attached per instructions to remind the hospitals that the product line should not be used in the MR environment.

"In the past, we have stated that the Thermoflect product may be used in the MR environment. However, after being informed by the FDA, at this time we will not promote the products for use in the Magnetic Resonance Environment. However, the product is still safe and effective for use in treating hypothermia."

We have been advised by the FDA that a report has been filed of an injury to an (MRI) patient. Several items are under consideration, including all of the blankets used in the MRI environment, of which Thermoflect is one. There is no evidence that the Thermoflect blanket caused the injury but as a precautionary measure we are voluntarily recalling the product line for relabeling.


Tags: Safety, Thermoflect blanket, hypothermia

Saturday, January 2, 2010

Musculoskeletal MRI 101 (I/II)

Tags: MSK, musculoskeletal MRI, protocol, magnetization transfer, magnetization transfer suppression, magic angle effect, tissue contrast, pulse sequences