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(MR mammography) Magnetic resonance imaging of the breast is particularly useful in evaluation of newly diagnosed breast cancer, in women whose breast tissue is mammographically very dense and for screening in women with a high lifetime risk of breast cancer because of their family history or genetic disposition.
Breast MRI can be performed on all standard whole body magnets at a field strength of 0.5 T - 1.5 Tesla. Powerful gradient strengths over 15 mT/m will help to improve the balance between spatial resolution, scanning speed, and volume coverage. The use of a dedicated bilateral breast coil is obligatory.
Malignant lesions release angiogenic factors that increase local vessel density and vessel permeability. Breast cancer is detectable due to the strong enhancement in dynamic breast imaging that peaks early (about 1-2 min.) after contrast medium injection. If breast cancer is suspected, a breast biopsy may be necessary to secure the diagnosis. See also Magnetic Resonance Imaging MRI, Biopsy and MR Guided Interventions.
Requirements in breast MRI procedures:
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Both breasts must be measured without gaps.
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For the best possible detection of enhancement fat signal should be eliminated either by image subtraction or by
spectrally selective fat saturation.
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Thin slices are necessary to assure absence of partial
volume effects.
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Imaging should be performed with a spatial
resolution in plane less than 1 mm.
For Ultrasound Imaging (USI) see Breast Ultrasound at Medical-Ultrasound-Imaging.com.
See also the related poll result: ' MRI will have replaced 50% of x-ray exams by' | | | | | | | | | | | | | | | | Further Reading: | | Basics:
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News & More:
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Technology advances in breast cancer screenings lead to early diagnosis Friday, 6 October 2023 by ksltv.com | | |
Are synthetic contrast-enhanced breast MRI images as good as the real thing? Friday, 18 November 2022 by healthimaging.com | | |
Abbreviated breast MRI protocols not as cost-effective as promised, new study shows Wednesday, 20 July 2022 by healthimaging.com | | |
Deep learning poised to improve breast cancer imaging Thursday, 24 February 2022 by www.eurekalert.org | | |
Pre-Operative Breast MRI Can Help Identify Patients Likely to Experience Nipple-Sparing Mastectomy Risks Wednesday, 7 April 2021 by www.diagnosticimaging.com | | |
Breast cancer screening recalls: simple MRI measurement could avoid 30% of biopsies Monday, 1 March 2021 by www.eurekalert.org | | |
A Comparison of Methods for High-Spatial-Resolution Diffusion-weighted Imaging in Breast MRI Tuesday, 25 August 2020 by pubs.rsna.org | | |
Pre-Operative Breast MRI Diagnoses More Cancers in Women with DCIS Thursday, 9 July 2020 by www.diagnosticimaging.com | | |
Breast MRI and tumour biology predict axillary lymph node response to neoadjuvant chemotherapy for breast cancer Thursday, 26 December 2019 by cancerimagingjournal.biomedcentral.com | | |
Breast MRI Coding Gets an Overhaul in 2019 Wednesday, 9 January 2019 by www.aapc.com | | |
How accurate are volumetric software programs when compared to breast MRI? Thursday, 27 July 2017 by www.radiologybusiness.com | | |
Additional Breast Cancer Tumors Found on MRI After Mammography May Be Larger, More Aggressive Wednesday, 9 December 2015 by www.oncologynurseadvisor.com | | |
Preoperative MRI May Overdiagnose Contralateral Breast Cancer Wednesday, 2 December 2015 by www.cancertherapyadvisor.com | | |
BI-RADS and breast MRI useful in predicting malignancy Wednesday, 30 May 2012 by www.oncologynurseadvisor.com |
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(dB) A customary logarithmic measure most commonly used (in various ways) for measuring sound.
If one sound is 1 bel (10 decibel) 'louder' than another, this means the louder sound is 10 times louder than the fainter one. A difference of 20 decibel corresponds to an increase of 10 x 10 or 100 times in intensity.
For sound pressure (the pressure exerted by the sound waves) 0 decibel equals 20 micropascal (μPa), and for sound power 0 decibel sometimes equals 1 picowatt.
See also Phon and Acoustic Noise. | | | | • View the DATABASE results for 'Decibel' (4).
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The dipole field is a field pattern produced by a closely spaced positive and negative electric charge or a north and south magnetic pole. At distances large compared to the dipole length, the field falls off as the third power of the distance away from the charges or poles producing it. | | | | | Further Reading: | Basics:
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Device Information and Specification
CLINICAL APPLICATION
Whole body
SE, IR, FSE, FIR, GE, SG, BASG, PBSG, PCIR, DWI, Radial, Angiography: TOF, FLUTE (Fluoro-triggered bolus MRA), Time-resolved MRA
IMAGING MODES
Single, multislice, volume study
Level Range: -2,000 to +4,000
POWER REQUIREMENTS
208/220/240 V, single phase
| | | | • View the DATABASE results for 'Echelon™ 1.5T' (2).
| | | • View the NEWS results for 'Echelon™ 1.5T' (3).
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