MRI BLOG

Proton MRS Spectra for Selected Brain Pathologies

2012-01-28T22:28:00.000-08:00

Tags: MRS, MR Spectroscopy, Metabolites, Low Grade Astrocytoma, Anaplastic Astrocytoma, Glioblastoma, Metastasis, Meningioma

T2 Preparation Pulses for Coronary Artery Imaging

2012-01-01T03:45:00.000-08:00

Tags: T2 preparation pulse, arterial blood, venous blood, myocardium

Arterial Spin Labeling (ASL)

2011-12-27T02:21:00.000-08:00

Tags: Arterial spin labeling, ASL, pASL, CBF, PICORE, QUIPSS, Q2TIPS, Magnetization Transfer

Source:
Petersen. Non-invasive measurement of perfusion: a critical review of arterial spin labelling techniques. British Journal of Radiology (2006) vol. 79 (944) pp. 688-701

Jahng et al. Improved perfusion-weighted MRI by a novel double inversion with proximal labeling of both tagged and control acquisitions. Magn. Reson. Med. (2003) vol. 49 (2) pp. 307-314

Colombini MRI Case: Root Cause Analysis - Tobias Gilk & Reliability Center

2011-07-14T07:32:00.000-07:00

Tags: MRI safety, Root cause analysis, Colombini accident

MRI-Conditional Cardiac Pacemakers & Leads from St. Jude Medical (SJM)

2011-06-25T08:10:00.000-07:00

Tags: MRI, cardiac pacemaker, implantable cardiac device, Accent MRI Pacemaker, Tendril MRI Lead

Susceptibility Weighted Imaging (II/II) - Image Gallery

2011-04-02T04:59:00.000-07:00

Tags: Susceptibility Weighted Imaging, SWI, Cerebral Venous Sinus Thrombosis, Microbleeds

Source:

Mittal et al. Susceptibility-weighted imaging: technical aspects and clinical applications, part 2. AJNR American journal of neuroradiology (2009) vol. 30 (2) pp. 232-52

Susceptibility Weighted Imaging (I/II)

2011-04-02T04:51:00.000-07:00

Tags: Magnetic Susceptibility, SWI, Phase-weighted Magnitude Image, T2*

Magnetic Susceptibility Artefact

2011-04-01T18:02:00.000-07:00

Tags: Magnetic Susceptibility, Artefact, Susceptibility Gradient

MRI of Silicone Breast Implant

2011-04-01T08:47:00.000-07:00

Tags: Breast implant, Silicone implant, MR Mammography, Inversion Recovery, Spectral Water Suppression

Brachial Plexus MRI (II/II)

2011-03-13T03:14:00.001-07:00

Brachial Plexus MRI (I/II)

Tags: Brachial Plexus, 3D STIR SPACE, 3D MR Myelography

Source:

Vargas et al. New approaches in imaging of the brachial plexus. European journal of radiology (2010) vol. 74 (2) pp. 403-10

Pitfalls of Diffusion Weighted Imaging

2011-03-12T05:55:00.000-08:00

Tags: Diffusion Weighted Imaging, DWI, T2 Shine-through, T2 Washout, T2 Blackout

Source:

Pitfalls & Artifacts in DW Imaging. In: M. Toshio, E. Sven, W. Per-Lennart (eds.), Diffusion-Weighted MR Imaging of the Brain. Springer-Verlag: Berlin Heidelberg, 2nd ed., 2009: 23-29.

Protocol for MRI of the Brain

2011-03-05T18:40:00.000-08:00

Tags: Brain, Protocol, FLAIR, DWI, SWI

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.

Ferromagnetic Detection System

2011-02-19T02:34:00.000-08:00

Installation inside the Magnet Room for an out-swing door configuration

Pass-through perpendicular to the wall installation

Unobtrusive parallel to the wall installation

Tags: Ferromagnetic Detection System, MRI Safety

The First-ever Digital Broadband MR System

2011-01-19T05:45:00.000-08:00

DirectDigital -- Increase SNR by up to 40%

Philips-exclusive DirectDigital RF samples the MR signal directly in the coil on the patient, and sends it to the reconstructor via fiber-optic cable. The result is up to 40% higher SNR, and a dynamic range that exceeds 185dB.

Tags: Philips Healthcare, MRI Scanner, Ingenia 1.5T

MRI Shielding Installation

2010-12-30T02:00:00.000-08:00

Tags: RF Shield, LED Lighting, Backlit Graphic Panel, Ferromagnetic Detector

Ferromagnetic Detector for Safe MRI Practice

2010-12-30T01:40:00.000-08:00

Tags: Ferromagnetic Detector, MRI Safety

FDA updates warning labels on gadolinium contrast

2010-09-10T06:31:00.000-07:00

Tags: Gadolinium, Gd, FDA

Source:

U.S. Food and Drug Administration

Gadolinium & Nephrogenic Systemic Fibrosis

2010-06-25T15:51:00.000-07:00

Tags: Nephrogenic Systemic Fibrosis, NSF, ACR, Gadolinium, Gd

Source:

The ACR Contrast Media Guidelines Version 7, 2010

iPad for Imaging-guided Surgery

2010-06-05T20:35:00.000-07:00

iPad can be used to access images from the PACS system for imaging-based surgical guidance. Wrapped in a sterile wrapper around the iPad, the surgeons are able to use touch gestures to navigate through 3D surface rendered images to help guide their scalpel. See for yourself this latest innovation in radiology and mobile technology.

Tags: iPad, 3D image, surgery, radiology, PACS

MRI Tragedy

2010-05-11T06:04:00.000-07:00

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

PoleStar N30 Surgical MRI System

2010-05-10T06:40:00.000-07:00

PoleStar iMRI Navigation Suite: An integration of surgical navigation and intra-operative imaging for neuro-oncologic surgery.

Tags: iMRI, surgical intervention, neuro-oncologic surgery, PoleStar, Medtronic

Brain MRI (Imaging Planes)

2010-05-02T07:10:00.000-07:00

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.

MRI-Conditional Pacemakers & Leads from BIOTRONIK

2010-04-09T22:30:00.000-07:00

Tags: MRI, cardiac pacemaker, implantable cardiac device

Cardiac Pacemaker Designed for MRI Safety

2010-04-09T22:14:00.001-07:00

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

Cardiac Pacemaker & MRI

2010-04-09T21:16:00.001-07:00

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

Ax Flies at MRI Fire

2010-03-30T06:46:00.000-07:00

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

MRI Safety Alert

2010-03-28T03:31:00.000-07:00

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

Tags: Magnet quench, quench button, fire

SEGMENT (Medical Image Analysis Software) for Mac OS X

2010-03-13T17:55:00.000-08:00

Click here for details.

Tags: Cardiac MRI, application software, SEGMENT

No Fear MRI

2010-02-26T04:35:00.000-08:00

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

Tags: Claustrophobia, successful MRI

7" Forceps Left Inside Patient's Body

2010-02-12T07:25:00.000-08:00

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MUM Donna Bowett had a routine operation - and doctors left a seven-inch set of forceps inside her. It was only when she had the MRI exam that...

Read more...

Tags: Forceps, safety

HONcode Certification

2010-02-11T06:03:00.000-08:00

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The HONcode is the code of conduct of the Health On the Net Foundation and is applied for voluntary health/medical websites. It was initiated in 1995 and has since grown to become the most widely used and best trusted ethical code for health/medical websites.

This site (MRI BLOG) complies with the HONcode standard for trustworthy health information:
verify here.

Tags: HONcode, certification

Dynamic Susceptibility Contrast (DSC)

2010-02-02T07:14:00.001-08:00

(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

Source:

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.

New Blood Pool Contrast Agent - Ablavar

2010-01-27T06:37:00.000-08:00

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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 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.

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

2010-01-27T05:25:00.000-08:00

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Funding Source

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.

Advertising Policy

This site is developed basically for knowledge and information sharing and will not accept advertisement or sponsorship of any sort at this stage.

Confidentiality Policy

Reader’s privacy is highly respected. Information on internet browser used by readers, time of visit & pages read, internet service provider and IP address collected from the visitors will not be disclosed to other parties. These data will ONLY be used for statistics and site improvement purpose. Email address provided by individual readers will also ONLY be used by the author of this site.

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.

Link Exchange Disclaimer

Links to other sites are for information only and this site accepts no responsibility or liability for access to, or the material on, any site which is linked from or to this site.

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

T1 Values in Infarcted & Noninfarcted Myocardium for Magnevist & MultiHance

2010-01-20T21:21:00.000-08:00

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

2010-01-20T19:01:00.000-08:00

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.

Meniscal Tears

2010-01-19T23:49:00.000-08:00

(Click on image to enlarge)

Tags: Meniscus, knee, full-thickness tear

Source:

Araceli Cabanillas's Images from radRounds

Partial Tears of Achilles Tendon

2010-01-18T23:05:00.000-08:00

(Click on image to enlarge)

Tags: Achilles tendon, ankle, partial tears

Source:

Araceli Cabanillas's Images from radRounds

New Standard for the Design of MRI Suite

2010-01-17T12:52:00.000-08:00

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)

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:

ACR Guidance Document for Safe MR Practices: 2007

MRI Design Guide by U.S. Department of Veterans Affairs (April 2008)

Worst Date Ever? ... Dinner & an MRI

2010-01-15T22:11:00.000-08:00

An episode from "Parks & Recreation" - The Set Up.

The MRI techs may find the part of video starting from "12:35" interesting. Enjoy!

If video loading is too slow, try the following link:

http://www.imdb.com/video/hulu/vi2581922841/

Tags: MRI, Comedy

Musculoskeletal MRI 101 (II/II)

2010-01-11T22:59:00.000-08:00

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

Future PACS Workstation via Mixed Reality Glasses?

2010-01-07T07:32:00.000-08:00

Future PACS workstation via MIxed Reality Glasses? Check this video out from Nokia (http://research.nokia.com/). This concept allows you to experience immersion and effortless navigation in an Augmented Reality environment. New types of interactions involving near-to-eye displays, gaze direction tracking, 3D audio, 3D video, gesture and touch. Through these new types of social linkages people will be connected in innovative ways between the physical and digital worlds.

Tags: Mixed Reality, glasses, PACS

Sources:

radRounds Radiology Network

FDA Warns of Sandbags in MRI Suites

2010-01-05T07:08:00.000-08:00

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

Sources:

AuntMinnie.com

FDA Alert & Notices (Medical Devices)

Encompass Group Voluntarily Recalls Thermoflect Product Line

2010-01-03T08:13:00.000-08:00

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...

Tags: Safety, Thermoflect blanket, hypothermia

Musculoskeletal MRI 101 (I/II)

2010-01-02T07:40:00.001-08:00

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

Foot (Midfoot) MRI

2009-12-31T22:33:00.001-08:00

Imaging Planes

(Click on image to enlarge)

Tags: Foot, MSK, protocol, imaging planes

Source:

Moeller T B and Reig E. Magnetic Resonance Imaging: Bones, Joints. In: MRI Parameters and Positioning. Thieme: Stuttgart·NewYork, 2003; 134-136.

New Year's Eve 2010

2009-12-31T07:22:00.000-08:00

Brachial Plexus MRI (I/II)

2009-12-30T10:12:00.000-08:00

Gross Anatomy

MRI Anatomy

Brachial Plexus MRI (II/II)

Tags: Brachial Plexus, MSK, protocol, imaging planes, anatomy

Sources:

Sureka et al. MRI of brachial plexopathies. Clinical radiology (2009) vol. 64 (2) pp. 208-18.

Gerevini et al. Diagnostic value and surgical implications of the magnetic resonance imaging in the management of adult patients with brachial plexus pathologies. Surg Radiol Anat (2008) vol. 30 (2) pp. 91-101.

van Es H W, Witkamp T D and Feldberg M A M. Brachial Plexus. In: Imaging of the Shoulder. Springer: Berlin Heidelberg, 2006; 287-296.

Hip MRI

2009-12-30T07:34:00.000-08:00

Imaging Planes

Imaging Protocol

(Click on the image to enlarge)

Coil Positioning

Tags: Hip, MSK, protocol, imaging planes

Source:

MSK Protocols for MAGNETOM Avanto - Hip

Application Hints & Video - Hip (Siemens)

Elbow MRI

2009-12-30T07:25:00.000-08:00

Imaging Planes

Imaging Protocol

Coil Positioning

Tags: Elbow, MSK, protocol, imaging planes

Source:

MSK Protocols for MAGNETOM Avanto - Elbow

Application Hints & Videos - Elbow (Siemens)

Shoulder MRI

2009-12-29T22:00:00.000-08:00

Imaging Planes

Imaging Protocol (with iPAT)

(click on image to enlarge)

Coil Positioning

Tags: Shoulder, Imaging planes, protocol, parallel imaging

Source:

MSK Protocols for MAGNETOM Avanto – Shoulder

Application Hints & Videos - Shoulder (Siemens)

FiatLux Visualization Software

2009-12-28T04:47:00.000-08:00

Another free medical visualization software, FiatLux Visualize™ Free, from FiatLux Imaging, Inc. The software, designed to run on any computer with Windows, is a 2D/3D DICOM viewer for CT and MRI.

Tags: 2D, 3D DICOM viewer, FiatLux Visualize

Product page: FiatLux Visualize™ Free

Cardiomyopathies by Cardiac MRI

2009-12-27T05:33:00.000-08:00

Tags: CMR, cardiomyopathies

Source:

radRounds

Merry Christmas, Everyone

2009-12-25T20:30:00.001-08:00

Ziosoft 3D Imaging Solutions

2009-12-25T19:11:00.000-08:00

zioTerm™ from Ziosoft provides a free basic 2D/3D application to the academic and research community for reviewing DICOM 3.0-compatible imaging data from CT, MR, PET, ultrasound, and X-ray on a local computer connected to the internet. zioTerm is currently not intended for patient diagnostic purposes.

Published features:

3D volume rendering
2D slab MIP
2D fusion
2D viewer
Maximum intensity projection (MIP)
Multi-planar reformat (MPR)
Manual curved planar reformat (CPR)
Multi-volume overlay
Measurement tools
Sculpting tools
Comparison tools
Snapshot and batch tools
Customizable color opacity presets

Tags: 3D, application software, zioTerm, Ziosoft

Product page: zioTerm Basic 2D/3D Application...

International CT Image Contest by Siemens

2009-12-24T18:15:00.000-08:00

A meaningful activity in the CT arena is worth sharing with you all. Getting the highest possible CT image quality at the lowest possible radiation dose to benefit the patients is challenging. Radiation dose reduction is currently the focus of attention of both the physicians and equipment vendors. Check out the Siemens International CT Image Contest - "highest image quality at lowest dose".

Samples of submitted 3D CT images...

Tags: CTA, cerebral CTA, cerebral CTV, coronary CTA

Source:

International CT Image Contest

Arrhythmogenic Right Ventricular Dysplasia/Cardiomyopathy (ARVD/C)

2009-12-24T09:09:00.000-08:00

Tags: ARVD, ARVC, fatty infiltration, myocardial fibrosis, traiangle of dysplasia, protocol, RV 2-chamber view

Sources:

Standardized CMR protocols from SCMR

Jain et al. Role of cardiovascular magnetic resonance imaging in arrhythmogenic right ventricular dysplasia. Journal of cardiovascular magnetic resonance : official journal of the Society for Cardiovascular Magnetic Resonance (2008) vol. 10 (1) pp. 32

Salary Data for MRI Technologists in the USA

2009-12-20T04:53:00.000-08:00

Tags: Salary, MRI Technologist

Source: Salary.com, December 2009

Dural Sinus Thrombosis

2009-12-19T20:18:00.001-08:00

MR Anatomy of Cerebral Venous System

MR Imaging Techniques

Tags: Dural sinus thrombosis, cerebral veins, time-of-flight, phase contrast, CE-MRA, MRA, MRV, MR Venography

Sources:

F. Allan Midyett F A, Fisher L, and Suresh Mukherji S. Imaging Dural Sinus Thrombosis. In: Current Protocols in Magnetic Resonance Imaging. John Wiley & Sons, 2003; A2.1.1 - A.2.1.12.

Anzalone N and Tartaro A. Intracranial MR Angiography. In: Magnetic Resonance Angiography, Techniques,Indications and Practical Applications. Springer: Verlag Italia, 2005; 109-122.

Leach et al. Imaging of cerebral venous thrombosis: current techniques, spectrum of findings, and diagnostic pitfalls. Radiographics : a review publication of the Radiological Society of North America, Inc (2006) vol. 26 Suppl 1 pp. S19-41; discussion S42-3.

Bergen D C, Fagnou J M and Sevick R J. Cerebrovascular Disease. In: Magnetic Resonance Tomography. Springer: Berlin Heidelberg, 2008; 329.

Magic Angle Phenomenon

2009-12-16T05:04:00.000-08:00

Illustrations

Tags: Magic angle effect, magic angle phenomenon, tendon, hyaline cartilage, fibrous cartilage, degeneration, tendinitis, partial tear

Sources:

Li and Mirowitz. Manifestation of magic angle phenomenon: comparative study on effects of varying echo time and tendon orientation among various MR sequences. Magnetic resonance imaging (2003) vol. 21 (7) pp. 741-4.

Erickson et al. The "magic angle" effect: background physics and clinical relevance. Radiology (1993) vol. 188 (1) pp. 23-5.

Mengiardi et al. Magic angle effect in MR imaging of ankle tendons: influence of foot positioning on prevalence and site in asymptomatic subjects and cadaveric tendons. Eur Radiol (2006) vol. 16 (10) pp. 2197-2206.

MR Signal Intensity of Aging Blood

2009-12-12T11:02:00.000-08:00

Bilateral subdural hematomas of differing age

Tags: Haemoglobin, haemosiderin, hemichromes, oxyhaemoglobin, deoxyhaemoglobin, methaemoglobin, signal evolution.

Reference:

Bradley W G. “MR appearance of hemorrhage in the brain.” Radiology 189, no. 1 (October 1993): 15-26

Bergen D C, Fagnou J M and Sevick R J. Intracerebral Hemorrhage Etiology. In: Magnetic Resonance Tomography. Springer: Berlin Heidelberg, 2008; 335.

Webcast Seminar

2009-12-07T09:36:00.000-08:00

Tags: Parallel imaging

Diffusion-weighted MR Imaging

2009-12-07T08:17:00.000-08:00

Tags: Diffusion-weighted imaging, b-factor, sensitization gradients, trace image, ADC map, T2 shine-through, stroke, DW-EPI

Source: Bitar et al. MR pulse sequences: what every radiologist wants to know but is afraid to ask. Radiographics : a review publication of the Radiological Society of North America, Inc (2006) vol. 26 (2) pp. 513-37

Pink Glove Dance

2009-12-04T05:43:00.000-08:00

Take a look at this viral video, though not MRI-related

The clever employees of Providence St. Vincent Medical Center in Portland, Ore. created their oh-so-cute video, "Pink Glove Dance" to the tune of Jay Sean's hit song, "Down" in order to raise money and awareness to fight breast cancer.

Tags: breast cancer awareness, pink glove dance, viral video

Hepatic Cavernous Hemangioma

2009-12-03T04:02:00.000-08:00

Tags: Liver, hepatic cavernous hemangioma, heavily T2-weighted sequence, centripetal fill-in.

Reference:

The American College of Radiology, Resident & fellow Section

Clinical Applications of In-& Out-of-Phase Imaging

2009-11-30T07:06:00.000-08:00

Adrenal MR Imaging

Liver MR Imaging

Spine MR Imaging

Tags: In-phase, out-of-phase, chemical shift of the second kind, adrenal adenoma, microscopic intracellular fat, macroscopic fat, Indian ink artifact, fatty liver infiltration, hemochromatosis, benign fracture, osteoporotic fracture, pathologic fracture, neoplastic fracture, wedging.

Reference:

The American College of Radiology, Resident & fellow Section

Carestream Health's Welcome to RSNA 2009

2009-11-29T05:16:00.000-08:00

Sneak-peak to the introduction of Carestream Health's "Jumbotron" video for RSNA 2009, showing a nurse walking through "radiology time."

T2* Measurement of Myocardial Iron in Thalassemia (Part III)

2009-11-27T19:42:00.001-08:00

T2* Measurement of Myocardial Iron in Thalassemia (Part I)

T2* Measurement of Myocardial Iron in Thalassemia (Part II)

Keywords: Thalassemia, hemochromatosis, hemosiderosis, iron overload, Kupffer cells

Source:

Hussain SM. Thalassemia with Iron Deposition. In: Liver MRI. Springer: Berlin Heidelberg, 2007; 180-181.

AVM of the Left Arm

2009-11-25T06:59:00.000-08:00

Equilibrium MRA with blood-pool contrast agent

Time-resolved MRA with blood-pool contrast agent.

T2* Measurement of Myocardial Iron in Thalassemia (Part II)

2009-11-24T07:10:00.001-08:00

T2* Measurement of Myocardial Iron in Thalassemia (Part I)

Note: Data in Figure 1 are hypothetical.

If you need a copy of the relevant paper for reference, email me and I'll send you one.

SEGMENT (Medical Image Analysis Software)

2009-11-20T08:44:00.000-08:00

3D visualization of the left ventricle

Main Features of SEGMENT

Video Tutorials

Download SEGMENT

Breast MRI

2009-11-17T08:05:00.000-08:00

Stay tuned, more to come...

Keywords: Breast MRI, DynaVIEWS, Multiple Measurement Protocol

MRI Safety Quiz

2009-11-15T05:58:00.000-08:00

Invite Comments & Critiques

2009-11-11T05:16:00.000-08:00

Intraoperative Magnetic Resonance Imaging (iMRI)

2009-11-11T03:30:00.000-08:00

Keywords: Digital Lightbox, iMRI, Intraoperative Magnetic Resonance Imaging

Covidien contraindicates use of its Optimark gadoversetamide injection

2009-11-09T06:36:00.000-08:00

Click here to learn more...

Keywords: GBMCA, NSF, Nephrogenic Systemic Fibrosis

Cardiac MRI - Imaging Planes for Valves

2009-11-07T18:53:00.000-08:00

Aortic Valve

Pulmonary Valve

Mitral Valve

Tricuspid Valve

Source:

Cardiovascular MR Imaging Planes and Segmentation (book chapter, 2005) by Andrew M. Taylor and Jan Bogaert.

Cardiac MRI - Quick Guide to Imaging planes

2009-11-07T06:41:00.000-08:00

Source:

Philips Medical Systems

Delayed Hyper-enhancement (HE) Patterns in CMR

2009-11-05T07:53:00.000-08:00

Keywords: Subendocardial Infarct, Transmural Infarct, Midwall HE, Epicardial HE, Global Endocardial HE, Ischemic, Non-ischemic.

Source:

Weinsaft et al. MRI for the assessment of myocardial viability. Cardiology clinics (2007) vol. 25 (1) pp. 35-56, v

CMR Imaging of Thrombus

2009-11-05T06:49:00.000-08:00

Keywords: CINE-CMR, DE-CMR, Thrombus, Clot

Imagery of Cardiac Pathology

2009-11-01T03:30:00.000-08:00

Source:

Ischemic Heart Disease (book chapter, 2005) by Steven Dymarkowski, Jan Bogaert, and Yicheng Ni

Keywords: Eosinophilic Myocarditis, Ischemic Cardiomyopathy, Dilated Cardiomyopathy, Hypertrophic Cardiomyopathy, Amyloidosis, Sarcoidosis, Myocarditis, Infiltrative Myocardial Infarct, Thrombus, Arrhythmogenic Right Ventricular Dysplasia, Vacsulitis

Myocardial MR Perfusion - Semiquantification

2009-11-01T03:13:00.001-08:00

Keywords: Myocardial Perfusion, Upslope, Myocardial Perfusion Reserve Index (MPRI)

Myocardial MR Perfusion - Pattern Recognition

2009-10-31T07:50:00.001-07:00

Keywords: Myocardial Perfusion, Artifacts, Perfusion Defects.

Pressure Gradient Measurement in CMR

2009-10-30T07:51:00.000-07:00

Source:

Tanaka et al. Correlation of Aortic Valve Area Obtained by the Velocity-Encoded Phase Contrast Continuity Method to Direct Planimetry using Cardiovascular Magnetic Resonance. J. of Cardiovascular Magnetic Resonance (2007) vol. 9 (5) pp. 799-805

Keywords: Continuity Equation, Modified Bernoulli Equation, Peak Velocity, CMR

CMR Imaging of Aortic Valve

2009-10-30T06:50:00.000-07:00

Keywords: Continuity Equation, Modified Bernoulli Equation, Peak Velocity, CMR

Flow Measurement in Main Pulmonary Artery

2009-10-29T07:10:00.001-07:00

Read here for alternate way of planning for RVOT.

Keywords: Free Breathing, Long Term Averaging, Retrospective Gating

T2* Measurement of Myocardial Iron in Thalassemia (Part I)

2009-10-23T21:42:00.000-07:00

If you need further details on getting the exponential trendline, feel free to let me know.

You may refer to Part II of this post for the derivation of T2* values.

References:

Leung et al. Magnetic resonance imaging assessment of cardiac and liver iron load in transfusion dependent patients. Pediatr. Blood Cancer (2009) vol. 53 (6) pp. 1054-1059

Westwood et al. Intercentre Reproducibility of Magnetic Resonance T2* Measurements of Myocardial Iron in Thalassaemia. The international journal of cardiovascular imaging (2005) vol. 21 (5) pp. 531-538

Westwood et al. A single breath-hold multiecho T2* cardiovascular magnetic resonance technique for diagnosis of myocardial iron overload. J. Magn. Reson. Imaging (2003) vol. 18 (1) pp. 33-9

Westwood et al. Interscanner reproducibility of cardiovascular magnetic resonance T2* measurements of tissue iron in thalassemia. J. Magn. Reson. Imaging (2003) vol. 18 (5) pp. 616-620

Anderson. Cardiovascular T2-star (T2*) magnetic resonance for the early diagnosis of myocardial iron overload. European Heart Journal (2001) vol. 22 (23) pp. 2171-2179

MRI Safety Alerts

2009-10-23T17:59:00.000-07:00

Contrast-enhanced FLAIR for Infectious Leptomeningitis

2009-10-22T09:48:00.000-07:00

If you're interested in knowing more about the T1 contrast characteristics of the long-TE FLAIR, leave me a note and I'll try to explain.

Reference:

Parmar et al. Contrast-enhanced flair imaging in the evaluation of infectious leptomeningeal diseases. European journal of radiology (2006) vol. 58 (1) pp. 89-95

Navigator-gated T2W Abdomen

2009-10-21T21:49:00.000-07:00

Reference:

Klessen et al. Magnetic resonance imaging of the upper abdomen using a free-breathing T2-weighted turbo spin echo sequence with navigator triggered prospective acquisition correction. J. Magn. Reson. Imaging (2005) vol. 21 (5) pp. 576-82

Interesting MRI Brain Localization

2009-10-20T09:58:00.000-07:00

Click here to learn more.

Acute Myocardial Infarction (AMI)

2009-10-19T07:16:00.000-07:00

Orientation Distribution of Spins

2009-10-18T02:00:00.000-07:00

Detailed CMR Anatomy

2009-10-17T22:29:00.001-07:00

Transverse Views

Legends

Coronal Views

Sagittal Views

Short Axis Views

Horizontal Long Axis Views

Vertical Long Axis Views

Left Ventricular Outflow Tract Views

Right Ventricular Outflow Tract Views

Source:

Bogaert J, Dymarkowski S, Tayor AM. Cardiac Anatomy. In: Clinical Cardiac MRI. Springer: Berlin Heidelberg, 2005; 61-83.

Phase Sensitive Inversion Recovery

2009-10-15T09:14:00.000-07:00

Keywords: Phase sensitive image reconstruction, IR TurboFLASH, 2D Single-shot IR TrueFISP, 3D navigator-gated IR TurboFLASH

Brain MRI - Neonates

2009-10-13T07:01:00.001-07:00

Keywords: Neonates, Brain, Gray Matter, White Matter

Source:

Jones RA., Palasis S., Grattan-Smith JD. MRI of the Neonatal Brain: Optimization of Spin-Echo Parameters. AJR 2004:182 367-372

GBMCA & NSF

2009-10-11T08:38:00.000-07:00

Other relevant document(s) for reference: