Time separation technique: Accurate solution for 4D C-Arm-CT perfusion imaging using a temporal decomposition model

2018 ◽  
Vol 45 (3) ◽  
pp. 1080-1092
Author(s):  
Sebastian Bannasch ◽  
Robert Frysch ◽  
Tim Pfeiffer ◽  
Gerald Warnecke ◽  
Georg Rose
Keyword(s):  
Perfusion Imaging ◽  
Ct Perfusion ◽  
Accurate Solution ◽  
Separation Technique ◽  
Time Separation ◽  
Decomposition Model ◽  
Ct Perfusion Imaging ◽  
Temporal Decomposition

Reproducibility of quantitative CT perfusion imaging

2001 ◽  
Vol 74 (882) ◽  
pp. 552-555 ◽  
Author(s):  
J H Gillard ◽  
N M Antoun ◽  
N G Burnet ◽  
J D Pickard
Keyword(s):  
Perfusion Imaging ◽  
Ct Perfusion ◽  
Quantitative Ct ◽  
Ct Perfusion Imaging

Abstract T P41: Determination of Collateral Supply Patterns Using MR or CT Perfusion Imaging

Stroke ◽  
2014 ◽  
Vol 45 (suppl_1) ◽  
Author(s):  
Cihat Eldeniz ◽  
Yueh Lee ◽  
Maria Gisele Matheus ◽  
Jeffery Keith Smith ◽  
James Faber ◽  
...  
Keyword(s):  
Perfusion Imaging ◽  
Ct Perfusion ◽  
Mapping Method ◽  
Collateral Flow ◽  
Scoring Method ◽  
Flow Mapping ◽  
Flow Maps ◽  
Ct Perfusion Imaging ◽  
Ischemic Tissue ◽  
Flow Information

Introduction: In this study, we sought to develop a collateral flow mapping method based on MR or CT perfusion imaging and compare this method with the digital subtraction angiography (DSA) method. Methods: Ischemic tissue supplied by collateral flow is likely to have delayed tracer arrival but relatively normal flow. In this study, abnormal Tmax (> 6 sec), MTT (4 sec or greater than unaffected hemisphere) and CBF (<40% of unaffected hemisphere) were labeled with green, red and blue, respectively (Fig. A). Any perfusion patterns can then be represented by a combination of this integrated RGB maps (Integrated Collateral flow Maps, iCMaps). 24 patients were included in this study. DSA images were obtained from all patients, whereas MR and CT perfusion images were acquired from 15 and 9 patients, respectively, within 30 hours after MCA occlusion. iCMaps collateral flow was scored independently as follows. iCMaps without any perfusion abnormality was assigned “1”. iCMaps with white as the dominant perfusion pattern was assigned a “5”; while those with a dominant green and yellow pattern were assigned a “2” or a “3”, depending on the relative green and yellow volume. Finally, iCMaps with a white region surrounded with yellow and green was assigned a “4”. Examples of iCMaps scoring are shown in Fig. B. Using a DSA scoring method in the literature5, a score of 1-5 was given independently based on the degree of retrograde collateralization (5: poor collateralization). Results: Good correlation was found between the MR perfusion iCMaps and DSA (DSA=0.70*MR iCMaps+0.54, R=0.75). Moderate correlation was obtained between the CT perfusion iCMaps and DSA (DSA=0.51*CT iCMaps+1.9, R=0.56). Conclusions: Based on the different characteristics of Tmax, MTT and CBF maps, the proposed MR or CT perfusion based iCMaps method can provide DSA comparable collateral flow information.

scholarly journals CT Perfusion Imaging as an Early Biomarker of Differential Response to Stereotactic Radiosurgery in C6 Rat Gliomas

PLoS ONE ◽  
2014 ◽  
Vol 9 (10) ◽  
pp. e109781 ◽  
Author(s):  
Timothy Pok Chi Yeung ◽  
Maher Kurdi ◽  
Yong Wang ◽  
Baraa Al-Khazraji ◽  
Laura Morrison ◽  
...  
Keyword(s):  
Stereotactic Radiosurgery ◽  
Perfusion Imaging ◽  
Ct Perfusion ◽  
Differential Response ◽  
Ct Perfusion Imaging ◽  
Early Biomarker
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