Follow-up in patients with subdural haematomas using near-infrared spectroscopy (NIRS)

1998 ◽  
Author(s):  
Hans-Juergen Hennes ◽  
Barbel Richter ◽  
Carsten Lott ◽  
Wolfgang Dick ◽  
Stephan Boor ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared

scholarly journals Follow-up near-infrared spectroscopy of ultraluminous infrared galaxies observed by ISO

2005 ◽  
Vol 441 (3) ◽  
pp. 999-1010 ◽  
Author(s):  
H. Dannerbauer ◽  
D. Rigopoulou ◽  
D. Lutz ◽  
R. Genzel ◽  
E. Sturm ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Infrared Galaxies ◽  
Ultraluminous Infrared Galaxies

scholarly journals Target Lesion Lipid Content Detected by Near-Infrared Spectroscopy After Stenting and the Risk of Subsequent Target Lesion Failure

2021 ◽  
Author(s):  
Ryan D. Madder ◽  
Takashi Kubo ◽  
Yasushi Ino ◽  
Takeyoshi Kameyama ◽  
Kosei Terada ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Intravascular Ultrasound ◽  
Near Infrared Spectroscopy ◽  
Lipid Content ◽  
Near Infrared ◽  
Target Lesion ◽  
Ultrasound Images ◽  
Characteristic Analysis ◽  
Target Lesion Failure

Objective: After percutaneous coronary intervention (PCI), it is unknown whether retained lipid content in the stented segment increases the risk of target lesion failure (TLF). This study evaluated the association between retained lipid content in the stented segment detected by post-PCI intracoronary near-infrared spectroscopy and TLF. Approach and Results: After the performance of PCI, post-PCI near-infrared spectroscopy–intravascular ultrasound images were acquired and analyzed by an independent core laboratory for retained lipid content in the stented segment, quantified by the maximum lipid core burden index in 4 mm (maxLCBI 4mm ). The primary outcome was TLF during follow-up, defined as a composite of cardiovascular death, target vessel myocardial infarction, and clinically driven target lesion revascularization. Among 202 patients with 209 target lesions treated by PCI and followed for 3.5±1.4 years, baseline post-PCI near-infrared spectroscopy–intravascular ultrasound images revealed a significantly greater maxLCBI 4mm in stented lesions with (297 [211, 401]) versus without (119 [9, 258]) TLF during follow-up ( P =0.006). By multivariate logistic regression, maxLCBI 4mm in the stented segment was independently associated with subsequent TLF (odds ratio, 1.6 [95% CI, 1.2–2.1] for every 100-unit increase, P =0.004). By receiver-operating characteristic analysis, the optimal residual maxLCBI 4mm threshold in the stented segment for subsequent TLF was 200. Stented lesions with a residual maxLCBI 4mm >200 had significantly greater TLF during follow-up than stented lesions with a maxLCBI 4mm ≤200 (15.0% versus 3.1%, P =0.002). Conclusions: Retained lipid content detected by near-infrared spectroscopy in the stented segment after PCI was associated with an increased risk of subsequent TLF.

scholarly journals Near infrared spectroscopy and optical coherence tomography derived plaque characteristics associated with increased plaque progression over 12-month follow up

2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
M Tomaniak ◽  
E.M.J Hartman ◽  
M.N Tovar Forero ◽  
J.J Wentzel ◽  
J Daemen
Keyword(s):  
Optical Coherence Tomography ◽  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Funding Source ◽  
Optical Coherence ◽  
Plaque Progression ◽  
Coronary Syndrome ◽  
Nirs Signal

Abstract Background Serial intravascular ultrasound (IVUS) studies demonstrated patterns of either plaque progression, regression or stabilization during pharmacotherapy including statin. At present little is known on specific plaque characteristics that are associated with excessive plaque growth. Purpose To evaluate the utility of near infrared spectroscopy (NIRS) and optical coherence tomography (OCT) to identify characteristics of non-culprit plaques associated with an increase in wall thickness (WT). Methods In this prospective, single-center study, patients with acute coronary syndrome (ACS) underwent, after successful treatment of the culprit lesions, both NIRS-IVUS and OCT assessment of a non-culprit artery at baseline and 12-month follow-up. For each vessel, 1.5-mm segments were identified, matched and divided into 45° sectors. A sector was considered as NIRS positive or labeled as OCT-detected fibrous cap atheroma (FCA), lipid rich or fibrous plaque when >75% of the sector area exhibited NIRS signal or specific OCT-detected feature. The relationship between change in IVUS-based WT, and the presence of NIRS positive signal or OCT-detected plaque components (FCA, lipid rich, fibrous) was evaluated using mixed ANCOVA, with NIRS status and OCT plaque components as fixed factors, and patient as random factor, adjusting for clustering effect of the data. All analyses of plaque WT change were adjusted for baseline WT. To examine the value of NIRS and OCT-detected plaque components in predicting plaque progression, a logistic mixed model was built with plaque progression defined as WT increase >0.2mm over the 12-month follow-up. Results A total of 38 patients (92% male, 21% diabetic) with 9167 matched sectors were analyzed at baseline and 12 months. Mean change in WT between baseline and 12 months was 0.014mm (95% confidence interval [CI] 0.011–0.018, p<0.001). Positive NIRS sectors showed more pronounced plaque progression than NIRS negative sectors (0.057mm, 95% CI 0.032–0.084 vs 0.014mm 95% CI 0.010–0.017, p=0.001) (Figure 1). FCA showed significant progression of WT over the 12-month follow-up (0.104mm, 95% CI 0.007–0.201), whereas a decrease in WT was observed in sectors with fibrous tissue (−0.031mm, 95% CI 0.048–0.014) (p=0.022). Baseline NIRS positive (OR 1.88, 95% CI 1.34–2.64) and OCT-detected lipid rich plaque (OR 1.47, 95% CI 1.20–1.81) were associated with 12-month plaque progression (>0.2mm) by logistic regression. Conclusions Positive NIRS signal and OCT-detected lipid plaque components imaged at baseline in non-culprit coronary arteries of patients presenting with ACS could identify vessel wall regions prone to plaque progression over a 12-month period. Figure 1. Plaque progression and NIRS Funding Acknowledgement Type of funding source: Other. Main funding source(s): M. Tomaniak acknowledges funding received as a Laureate of the European Society of Cardiology Research and Training Programme in the form of the ESC 2018 Grant.

scholarly journals Machine learning augmented near-infrared spectroscopy: In vivo follow-up of cartilage defects

2020 ◽  
Author(s):  
J.K. Sarin ◽  
N.C.R. te Moller ◽  
A. Mohammadi ◽  
M. Prakash ◽  
Jari Torniainen ◽  
...  
Keyword(s):  
Machine Learning ◽  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Cartilage Defects
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