Upload
albert-andaluz-gonzalez
View
268
Download
5
Embed Size (px)
Citation preview
Albert Andaluz [CVC] Francesc Carreras [CCB,HSP]Cristina Santa-Marta [HGM]Debora Gil [CVC]
http://iam.cvc.uab.es
Myocardial torsion estimation withTagged-MRI in the OsiriX platform
[1] Rosset, A., Spadola, L., Ratib, O.: Osirix: an open- source software for navigating in multidimensional dicom images. J Digit Imaging 17(3) (Sep 2004) 205--16[2] Carreras, F., Garcia-Barnes, J., Gil, D., et Al: Left ventricular torsion and longitudinal shortening: two fundamental components of myocardial mechanics assessed by tagged cine-mri in normal subjects. Int J Cardiovasc Imaging (Feb 2011)
References
Torsion estimation
Why Osirix?
Validation
Why Tagged-MRI?Tagged-MRIWhy torsion?
Validation
OsiriX[1]
DOMAIN: manual segmentation of LV Boundaries at reference frame
"Designed by physicians for physicians"Myocardial torsion follows myocardial functionality
Tag-grid deformation reflects intramural motion
CHALLENGE: heterogeneous image quality
[CVC]: Computer Vision Center, UAB. Barcelona,Spain [HSP]: Hospital de Sant Pau. Barcelona, Spain[CCB]: Clinica Creu Blanca. Barcelona, Spain [HGM]: Hospital Gregorio Maranon, Dpt Fisica Matematica y de Fluidos, UNED.
Affiliations
Source # Seqs Healthy? Modality DeviceCCB 21 Yes SPAMM SiemensHSP 8 No CSPAMM PhilipsCCB 12 No SPAMM SiemensHGM 7 No SPAMM Philips
40,0
60,0
100,0
20,0
80,00,0
-2,0
4,0
6,0
8,0
2,0
0,0
Torsion
Base rotation
Apex rotation
%ES
degrees
Left Ventricle
MOTION : HPF ensures robust tracking wihout overestimating injured areas [2]
TORSION: difference in basal/mid and apex global rotation in the LV domain
...Boundary evolution
t=ref t=ref+1 t=ES
Harmonic Phase Flow
PLUGIN: deployed at Sant Pau in September 2011
Conclusions and future work
Similar torsion trends for SPAMM acquisitions. C-SPAMM sequences too noisy for motion extraction.We will focus on quality indicators for improved reliability
HGM HSPCCB
PROTOCOL: different acquisitions, healthy and pathological cases
Base
Apex AMT
Dicom Viewer
Open Source
Image Processing
Oversaturation overlays tags over material points
+ =
t=ref t=ref+1 t=ref+2
100101010101010101010101001010
(devcom icon (C) Devcom. http://www.devcom.com/)
Base ApexScores