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Unrestricted © Siemens AG 2014 All rights reserved.
Magnetic Resonance Magnetic Resonance
Unrestricted © Siemens AG 2013 All rights reserved.
Growth with Body MRI
H.-Hartziekenhuis Lier
40 oz/d tussen 8 en 21 uur
3-5 body mri/d
Aparte protocols voor
leverletsels / pancreas, mrcp
rectum, ovarium, cervix / uterus, pelvimetrie
anus / fistula
enteroclyse, prostaat
Body MRI
Unrestricted © Siemens AG 2014 All rights reserved.
Magnetic Resonance Magnetic Resonance
Unrestricted © Siemens AG 2013 All rights reserved.
Growth with Body MRI
Technische uitdaging,
onderzoek gebeurt best
snel en robuust
Body MRI
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Magnetic Resonance Magnetic Resonance
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Growth with Body MRI
Mentale uitdaging want…
overweldigende en vaak
verwarrende
Body MRI
Unrestricted © Siemens AG 2014 All rights reserved.
Magnetic Resonance Magnetic Resonance
Unrestricted © Siemens AG 2013 All rights reserved.
Growth with Body MRI
Mentale uitdaging want…
overweldigende en vaak
verwarrende
Acronym Hell
Body MRI
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Magnetic Resonance Magnetic Resonance
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Growth with Body MRI
or ... Heaven !
Overweldigend performant
en vlot in gebruik
Body MRI
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Magnetic Resonance Magnetic Resonance
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Growth with Body MRI
Uitdaging
Contrast bolus timing
Ademhalings artifacten
Kwantitatieve beeldvorming
Lever MRI
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Magnetic Resonance Magnetic Resonance
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Growth with Body MRI
Met welke TRICKS?
Oud acroniem voor Time Resolved Imaging of Contrast KineticS,
(Oorspronkelijk voor MR-angiografie)
Lever MRI
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Magnetic Resonance
Growth with Body MRI
Nieuwe Zekerheid
in Lever MRI.
Met FREEZEit en
LiverLab1.
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Magnetic Resonance
FREEZE-it is not an acronym but a commercial slogan
for applied accelaration techniques
FREEZE-it
• adds imaging speed and motion compensation for
higher quality diagnostic imaging of the liver
• TWIST-VIBE = ultimate TRICKS = speed
• STAR-VIBE = motion compensation
Unrestricted © Siemens AG 2014 All rights reserved.
Magnetic Resonance
FREEZE-it is not an acronym but a commercial slogan
for applied accelaration techniques
TWIST-VIBE Time resolved angiography With Stochastic (non
Cartesian) Trajectories
(K-space sampling technique, i.e. Keyhole-imaing,
increases temporal resolution without loss of
spatial resolution)
Volumetric Interpolated Breath-hold Examination
allows imaging the entire arterial phase of the liver
with multiple 3D datasets within seconds while
maintaining a high spatial resolution
6 s 3 s
Unrestricted © Siemens AG 2014 All rights reserved.
Magnetic Resonance
FREEZE-it is not an acronym but a commercial slogan
for applied accelaration techniques
TWIST-VIBE Time resolved angiography With Stochastic (non
Cartesian) Trajectories
(K-space sampling technique, i.e. Keyhole-imaing,
increases temporal resolution without loss of
spatial resolution)
Volumetric Interpolated Breath-hold Examination
allows imaging the entire arterial phase of the liver
with multiple 3D datasets within seconds while
maintaining a high spatial resolution
6 s 3 s
allows for detection of more lesions and more
accurate differential diagnosis
Unrestricted © Siemens AG 2014 All rights reserved.
Magnetic Resonance
FREEZE-it is not an acronym but a commercial slogan
for applied accelaration techniques
Star-VIBE combination of compressed sensing, parallel imaging and
golden-angle radial sampling (“stack of stars”)
central K-space points (defining image contrast) are sampled in
every line, allowing the low-resolution images from individual
lines to be compared for in-plane rotation and translation (which
can be corrected) and through-plane motion (which motivates
re-acquisition of that line of data)
a final high-resolution image is constructed once all the lines of
data are acquired
Unrestricted © Siemens AG 2014 All rights reserved.
Magnetic Resonance
FREEZE-it is not an acronym but a commercial slogan
for applied accelaration techniques
Star-VIBE combination of compressed sensing, parallel imaging and
golden-angle radial sampling (“stack of stars”)
central K-space points (defining image contrast) are sampled in
every line, allowing the low-resolution images from individual
lines to be compared for in-plane rotation and translation (which
can be corrected) and through-plane motion (which motivates
re-acquisition of that line of data). A final high-resolution image
is constructed once all the lines of data are acquired
Star-VIBE allows motion compensation and enables CE liver
imaging during free breathing
Conventional
StarVIBE2
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Magnetic Resonance Magnetic Resonance
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TWIST-VIBE 2
Altijd het juiste contrast
in dynamicsche lever MRI.
StarVIBE2
Free-breathing contrast-
enhanced body imaging.
LiverLab1
Kwantitative lever imaging,
niet-invasief.
Nieuwe Zekerheid in Lever MRI
Oplossing – FREEZEit technologie en LiverLab1
University Hospital IKRN, Mannheim, Germany
FREEZEit
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Magnetic Resonance
Some more terms
DIXON Not an acronym
implementation of Dixon’s method of acquiring in-
phase and out-of-phase images (i.e. 2 echoes) and
calculating water-only and fat-only images
Older concept, mid-80’s
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Magnetic Resonance
Some more terms
DIXON Not an acronym
implementation of Dixon’s method of acquiring in-
phase and out-of-phase images (i.e. 2 echoes) and
calculating water-only and fat-only images
Older concept, mid-80’s
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Magnetic Resonance
Some more terms
eDIXON Not an acronym
Implementation of Dixon’s method for quantification and evaluation of fat and iron
deposition in liver tissue = LiverLab
first step in monitoring early stages of liver diseases
enables non-invasive identification of patients with fatty liver and iron overload already
at an early disease stage, helps to minimize the need for biopsy
fat and iron screening part (First look Dixon) + two methods for evaluation: HISTO
(voxel based) and Multi-echo Dixon VIBE (image based), provides a clinical report
Unrestricted © Siemens AG 2014 All rights reserved.
Magnetic Resonance
Some more terms
eDIXON Not an acronym
Implementation of Dixon method in quantification and evaluation of fat and iron
deposition in liver tissue = LiverLab
first step in monitoring early stages of liver diseases
enables non-invasive identification of patients with fatty liver and iron overload already
at an early disease stage, helps to minimize the need for biopsy
fat and iron screening part (First look Dixon) + two methods for evaluation: HISTO
(voxel based) and Multi-echo Dixon VIBE (image based), provides a clinical report
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Magnetic Resonance
Some more terms
CAIPIRINHA
true acronym
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Magnetic Resonance
Some more terms
CAIPIRINHA
true acronym
evolution of sense and grappa
Controlled Aliasing In Parallel Imaging Results In Higher Acceleration
dedicated sampling pattern to distribute k-space points more uniformly
to reduce pixel aliasing and overlap on reconstructed images
improved algorithm for reconstruction of datasets
single digit (<10 sec) breath-holds possible for 3D-T1 exams
higher SNR enables higher spatial resolution
higher PAT factors enabled with excellent image quality
reduced patient stress and increased patient compliance
CAIPIRINHA pattern with
acceleration in two directions
plus phase shift of alternate
rows
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Magnetic Resonance
Some more terms
CAIPIRINHA
true acronym
“software package for specific data acquisition technique”
Controlled Aliasing In Parallel Imaging Results In Higher Acceleration
can be combined with 3D T1 VIBE (allows for SPectral Attenuated
Inversion Recovery and spectral FS)
or 3D Dixon (Four contrasts: in phase, opposed phase, fat and water) in a
single short breath-hold
COMING UP NEXT: CAIPIRINHA-DIXON-TWIST-VIBE
(29 seconds free breathing, 14 high spatial resolution 3D datasets using
view sharing, temporal resolution 2,1 seconds)
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Magnetic Resonance
Some more terms
BLADE
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Magnetic Resonance
Some more terms
BLADE
Not an acronym
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Magnetic Resonance
Some more terms
BLADE
Not an acronym
Refers to Siemens name for PROPELLER
(Periodically Rotated Overlapping ParallEL Lines with
Enhanced Reconstruction)
(non-Cartesian k-space data acquisition, in small groups of
parallel lines through the center of k-space, the groups rotated
with respect to one-another)
used for motion correction in TSE sequences
Unrestricted © Siemens AG 2014 All rights reserved.
Magnetic Resonance
Some more terms
BLADE
Not an acronym
Refers to Siemens’ name for PROPELLER
(Periodically Rotated Overlapping ParallEL Lines with
Enhanced Reconstruction)
(non-Cartesian k-space data acquisition, in small groups of
parallel lines through the center of k-space, the groups rotated
with respect to one-another)
used for motion correction in TSE sequences
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Magnetic Resonance Magnetic Resonance
Unrestricted © Siemens AG 2013 All rights reserved.
MR leverletsel in 7 min transversale haste T2-opnamen (48/27)
coronale haste-T2-opnamen zonder en met fatsat (2x48/23)
transversale ademhalingsgetriggerde TSE-T2-opnamen met fatsat (3 min, var)
transversale trufi-T2-opnamen (58/33)
transversale epi-diffusie opnamen (B0, 50, 300, 500, 800 en ADC-map = 3 min 51 sec)
transversale e-dixon-vibe-T1-opnamen (in, opp, F en W, segmentatie en report, 14/64)
transversale dynamische twist-vibe T1-opnamen voor, tijdens en laattijdig na intraveneuze
injectie van Gadolinium (3 x 4 fasen) (3 x 8+3,2+3,2+3,2=17,6 sec)
coronale vibe-dixon-T1 opnamen (in, opp, F, W) (13/72)
transversale vibe-T1-pnamen met fatsat (12/72)
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Magnetic Resonance Magnetic Resonance
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MR prostaat in 15 min cor en sag BLADE-T2 opnamen (1min24/36 en 1min40/24)
trans q-TSE-T2 (3min17/28)
trans epi-diffusie (B0, B750 en B1000 en ADC-map = 3 min 51 sec)
trans q-TSE-T1 fat sat (1min12/24)
trans dynamische twist-vibe T1-opnamen voor, tijdens en laattijdig na intraveneuze injectie van
Gadolinium (40 fasen) (40x4,7=3min7)
cor en trans q-TSE-T1 fatsat (1min31/24 en 1min12/24)
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Magnetic Resonance Magnetic Resonance
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MR enteroclyse in 6 min MR onderzoek uitgevoerd na perorale maagdarm voorbereiding met 2 liter mannitol oplossing
free breathing
cor haste-T2 (48/27)
cor trufi fat sat (48/27) en cor haste-T2 fatsat (48/27)
trans trufi (36/32) en trans haste (34/35)
trans vibe-dixon T1-gewogen (in, opp, F, W) (15/64)
coronale dynamische 2D flash-T1 na intraveneuze injectie van Buscopan en vervolgens
Gadolinium (10 fases, 7/19, free breathing)
trans en cor dixon-vibe-T1 (in, opp, F, W) (2x15/64)
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Magnetic Resonance
Answers for life. Unrestricted © Siemens AG 2014 All rights reserved.
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