eprintid: 829
rev_number: 17
eprint_status: archive
userid: 35
dir: disk0/00/00/08/29
datestamp: 2011-09-07 13:48:06
lastmod: 2013-03-05 15:43:59
status_changed: 2011-09-07 13:48:06
type: conference_item
metadata_visibility: show
item_issues_count: 0
creators_name: Tsaftaris, Sotirios A.
creators_name: Tang, Richard
creators_name: Klein, Rachel
creators_name: Li, Debiao
creators_name: Dharmakumar, Rohan
creators_id: sotirios.tsaftaris@imtlucca.it
creators_id: 
creators_id: 
creators_id: 
creators_id: 
title: Visualizing and quantifying myocardial oxygenation changes with statistically optimal colormaps
ispublished: submitted
subjects: QA76
subjects: RC
subjects: TK
divisions: CSA
full_text_status: none
pres_type: poster
abstract: Blood-oxygen-level dependent (BOLD) MRI may be used for detecting myocardial oxygenation (MO) changes secondary to coronary artery stenosis. Under pharmacological stress, areas of the myocardium supplied by a stenotic coronary artery are hypointense relative to healthy regions. Visualizing these changes requires manual windowing. In this paper a method for automatic visualization and quantification of myocardial signal changes reflecting the regional variations in oxygenation is presented, using images obtained from a canine study under controlled conditions.
The objective of this study is to overcome the rather subjective step of windowing by establishing an optimal colormap that permits visualization of
statistical changes in signal intensities between healthy and pathological cases. In addition, graph theory is used to derive a quantitative metric indicative
of changes in myocardial oxygenation. The purpose of this effort is to facilitate the evaluation of myocardial BOLD images by automating the
detection of regional abnormalities in MO under pharmacological stress in the presence of coronary artery stenosis.
date: 2009
event_title: 17th Meeting of the  international society for magnetic resonance in medicine
event_location: Honolulu, Hawaii
event_dates: 18-24 April 2009
event_type: conference
refereed: TRUE
related_url_url: http://www.ismrm.org/09/index.htm
related_url_type: org
citation:   Tsaftaris, Sotirios A. and Tang, Richard and Klein, Rachel and Li, Debiao and Dharmakumar, Rohan  Visualizing and quantifying myocardial oxygenation changes with statistically optimal colormaps.  In: 17th Meeting of the international society for magnetic resonance in medicine, 18-24 April 2009, Honolulu, Hawaii       (Submitted)   (2009)