CT angiografie
description
Transcript of CT angiografie
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CT angiografie
Mark WinkensTweesteden Ziekenhuis, Tilburg
Cardiovasculair risicomanagement anno 2011
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CasusVrouw 1956VG: Hypercholesterolemie, Hypertensie
RF: Familiair belastRx: Simvastatine
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Casus
Presentatie EHH ivm zowel typische als atypische thoracale klachten
Lichamelijk onderzoek: RR 180/90 L=R, p 90 bpm, verder g.b.
Conclusie: deels typische deels atypische thoracale pijn bij 53 jarige vrouw
met verhoogd risicoprofiel en licht afwijkend ecg
lab: trop T < 0.01Grace score 6 maanden dood of MI: 7%
Plan: direct Cardiale CT ter rule out coronairlijden
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Detector array
At least 180 degrees of data are required for image reconstruction
X-ray tube
CT data collectionrotatie tijd 270 ms!!
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• Multislice scanners (MSCT), multi detector (MDCT)
• combi met PET • 4-16-40-64-128-256-320 slice• Philips, Toshiba, Siemens, GE
• Dual source scanners (Siemens) • Toekomst:
• Dual layer scanners• Dual energy scanners• Spectral CCT
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BU-CT, DACH, Gerold Krüger, Hamburg
Dose exposure
2Courtesy: Dr.O. Klass/Dr.M. Hoffmann
high endCardiac - CTa
1-3 mSv
Iterative reconstruction methods0,6-2 mSv
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Current status in coronary artery imaging (64 slice)
tekst
CCT; indications, applications, limitations, and traing requirements EHJ (2008) 29, 531-556
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Images Courtesy of: Medmar, Istanbul, Turkey
Current status : Low dose scanning @ higher HR with arrhythmia
• 128x0.625• RT 0.27s• S&S @40%• Scan Time 5s• Scan Length 12 cm• 120kV, 200mAs
2.8mSv
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Excellent robust image quality
• 128x0.625• RT 0.27s• S&S no tolerance• Sharp kernel XCC• Scan Length 28 cm• 100kV,150mAs
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1212
Acute chest pain, aortic dissection
46 yrs
Brilliance iCT• 100 kVp• Step & Shoot Complete• Adaptive Collimation• iDose4
• 3.5 mSv
Chest Pain Assessment1463 images reconstructed in 90 s!“ Triple rule out”
20778
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Fusion of Nuclear. Med and CT: PET and SPECT CT
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Cardiac CT the (non invasive) athero
burden read out of the future in your practice and
research??
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Accuracy of Plaque detection
Detection rate MSCT vs IVUS:
Soft Plaque:83% (54/65)
Mixed Plaque:94% (50/53)
Calcified Plaque:95% (41/43)
Leber et. al. Accuracy of 64-slice computed tomography to classify and quantify plaque volumes in the proximal coronary
system: a comparative study using intravascular ultrasound. J Am
Coll Cardiol, 47(3), 672-677, 2006.
Correlation IVUS vs CTquant: r2 0.6-0.8
Sample CT coronary angiogram
iCTLeber et. al. Accuracy of 64-slice computed tomography to classify and quantify plaque volumes in the proximal coronary system: a comparative study using intravascular ultrasound. J Am Coll Cardiol, 47(3), 672-677, 2006.
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Klass et al.; Int J Cardiovasc Imaging 2010
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Plaque Imaging
Softplaque
2005rule out indicati
on
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Plaque monitoring
Softplaque
2009-after 4 years of statin
therapy-
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The High risk plaque
JACC july 2009
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The Napkin-Ring Sign: the high risk coronary plaque?
JACC cv imaging Vol 3 No 4 2010 440-4: Maurovich, Hoffman, Virmani et al.
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JACC vol. 58 no.19 nov 1 2011:1989-97
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2222
Recurrent chest pain, old LAD stent
42 yrs
Brilliance iCT• 100 kVp• Step & Shoot• iDose4
• 3.0 mSv
• Myocardial Defect Assessment
5924
Improving Positive Predictive ValueAnatomy + Perfusion : One Stop Shop @ background radiation
tekst
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QuickTime™ en een-decompressor
zijn vereist om deze afbeelding weer te geven.
QuickTime™ en eenCinepak-decompressor
zijn vereist om deze afbeelding weer te geven.