Tags: Ferromagnetic Detector, MRI Safety
Thursday, December 30, 2010
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
Source:
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...
Sunday, March 28, 2010
Saturday, March 13, 2010
Friday, February 26, 2010
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
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Illustrated below is one of the clinical examples of the applicaton of blood pool contrast agent from www.bloodpoolagents.com:
(Click on image to enlarge)
More information on Blood Pool Agents.
Tags: Ablavar, Gadofosveset trisodium, Gd, MRA, AIOD, PVD, blood pool contrast agent, aneurysm spurium, thrombosis
Reference:
Goyen M et al. MR angiography of aortoiliac occlusive disease: a phase III study of the safety and effectiveness of the blood-pool contrast agent MS-325.Radiology. 2005;236(3):825-833.
Goyen M et al. MR angiography of aortoiliac occlusive disease: a phase III study of the safety and effectiveness of the blood-pool contrast agent MS-325.Radiology. 2005;236(3):825-833.
Rapp JH et al. Aortoiliac occlusive disease in patients with known or suspected peripheral vascular disease: safety and efficacy of gadofosveset-enhanced MR angiography—multicenter comparative phase III study. Radiology. 2005;236(1):71-78.
Perreault P et al. MR angiography with gadofosveset trisodium for peripheral vascular disease: phase II trial.Radiology. 2003;229(3):811-820.
DISCLOSURE
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This blog is hosted by Blogger, a free publishing tool from Google, for sharing thoughts & ideas on Magnetic Resonance Imaging with the MRI community. I’ve to pay out of my own pocket at a later date when the volume of data of this site exceeds the free storage provided by Google. I take my own time to post here and read other sites; and am not paid by anybody to do this.
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This blog is open to the public and is therefore freely accessible by all internet users. Readers are encouraged to express their comments to any entries posted in this blog. Modification or removal of the comments posted is possible by notifying the author of this site through "CONTACT ME" near the right upper corner of this blog.
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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
Source:
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
Source:
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
Monday, January 18, 2010
Partial Tears of Achilles Tendon
(Click on image to enlarge)
Tags: Achilles tendon, ankle, partial tears
Source:
Sunday, January 17, 2010
New Standard for the Design of MRI Suite
(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
Sources:
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.
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
Sources:
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.
Read more...
"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.
Read more...
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