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Intravascular Imaging

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https://www.readbyqxmd.com/read/30314734/separating-high-z-oral-contrast-from-intravascular-iodine-contrast-in-an-animal-model-using-dual-layer-spectral-ct
#1
Todd C Soesbe, Matthew A Lewis, Khaled Nasr, Lakshmi Ananthakrishnan, Robert E Lenkinski
RATIONALE AND OBJECTIVES: To show that water and iodine two-material decomposition images from dual-layer dual-energy spectral X-ray computed tomography (DECT) can be used to separate intravascular iodine contrast from simultaneously administered oral tantalum, tungsten, or rhenium contrast in an animal model. MATERIALS AND METHODS: In this Institutional Animal Care and Use Committee approved study, four female Fischer rats were given simultaneous intravenous and oral X-ray computed tomography contrast...
October 9, 2018: Academic Radiology
https://www.readbyqxmd.com/read/30313105/intravascular-large-b-cell-lymphoma-presenting-as-multiple-stroke-a-case-report
#2
Muharrem Yunce, Nargiz Muganlinskaya, Stephen Selinger
INTRODUCTION: Intravascular large B-cell lymphoma (IVLBCL) is an uncommon disease with a poor prognosis if not diagnosed early. It can present with central nervous system (CNS) manifestations. The diagnosis of IVCBCL is difficult to make given its varied clinical manifestations and the lack of a specific diagnostic modality. CASE PRESENTATION: We report an interesting case of IVLBCL presenting as bilateral strokes. The diagnosis was made by a random skin biopsy, which confirmed IVLBCL...
October 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/30310541/acute-liver-failure-secondary-to-severe-systemic-disease-from-fatal-hemophagocytic-lymphohistiocytosis-case-report-and-systematic-literature-review
#3
Mitchell S Cappell, Ismail Hader, Mitual Amin
AIM: To systematically review liver disease associated with hemophagocytic lymphohistiocytosis (HLH), propose reasonable contraindications for liver transplantation for liver failure in HLH, and report an illustrative case. METHODS: Systematic review according to PRISMA guidelines of hepatic manifestations of HLH using computerized literature search via PubMed of articles published since 1980 with keywords ("hemophagocytic lymphohistiocytosis" or "HLH") AND ("liver" or "hepatic")...
September 27, 2018: World Journal of Hepatology
https://www.readbyqxmd.com/read/30305586/bifurcation-intervention-in-single-coronary-artery
#4
Akira Shikuma, Jun Shiraishi, Nariko Koshi, Yuki Matsubara, Tetsuro Nishimura, Keisuke Shoji, Daisuke Ito, Masayoshi Kimura, Eigo Kishita, Yusuke Nakagawa, Masayuki Hyogo, Takahisa Sawada
A 77-year-old man was referred to our hospital for angina on effort. Coronary angiography and computed tomography demonstrated a single coronary artery arising from the right sinus of Valsalva. The left circumflex coronary artery (LCx) anomalously deriving near from the ostium of right coronary artery exhibited severe stenosis in the bifurcation of the obtuse marginal branch. Although the bifurcation lesion still remains a therapeutic challenge for guide extension catheter (GEC)-based percutaneous coronary intervention, under the guidance of intravascular ultrasound imaging, we successfully implanted an everolimus-eluting stent at the bifurcated LCx lesion and performed kissing balloon inflation using 0...
October 10, 2018: International Heart Journal
https://www.readbyqxmd.com/read/30302770/laser-threshold-and-cell-damage-mechanism-for-intravascular-photoacoustic-imaging
#5
Timothy Sowers, Don VanderLaan, Andrei Karpiouk, Eleanor M Donnelly, Ethan Smith, Stanislav Emelianov
OBJECTIVES: Intravascular photoacoustic (IVPA) imaging is being developed to image atherosclerotic plaques, a leading cause of morbidity and mortality in the United States. However, the safety of this imaging modality, which requires repeated irradiation with short laser pulses, has not yet been investigated. This study has two objectives. First, determine in vitro the limit of cumulative fluence that can be applied to cells before death at IVPA relevant wavelengths. Second, evaluate if high single pulse fluences are a potential cause of cell death during IVPA imaging...
October 10, 2018: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/30292265/breast-cancer-staging-combined-digital-breast-tomosynthesis-and-automated-breast-ultrasound-versus-magnetic-resonance-imaging
#6
Rossano Girometti, Ludmila Tomkova, Lorenzo Cereser, Chiara Zuiani
PURPOSE: To investigate whether combined Digital breast tomosynthesis and Automated breast volume scanner (DBT-ABVS) are comparable to Magnetic resonance imaging (MRI) in staging breast cancer. METHODS: We retrospectively included seventy-three patients with histologically proven breast cancer who underwent preoperative DBT, ABVS and 1.5 T MRI in the period July 2015-July 2016. Two radiologists in consensus recorded the number, site and Breast imaging-reporting and data system (BI-RADS) category of breast findings during two independent reading strategies, i...
October 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/30286911/imaging-in-heart-transplant-patients
#7
REVIEW
Michael Olymbios, Jacek Kwiecinski, Daniel S Berman, Jon A Kobashigawa
Heart transplantation is an accepted treatment for select patients with end-stage heart failure. Improvements to immunosuppressive therapies and patient management have increased the half-life of heart transplant patients to over 10 years. Despite this success, rejection remains the "Achilles heel" of heart transplantation. The early detection of acute rejection and cardiac allograft vasculopathy are paramount to avoiding graft loss. Unlike in kidney and liver transplantation, there are no clinically validated biomarkers for detecting heart transplant rejection...
October 2018: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/30280797/correlation-between-adiponectin-polymorphism-and-atherosclerotic-plaque-compositions-under-intravascular-ultrasound-ivus
#8
X-S Qian, J-X Song, M-H Zhu
OBJECTIVE: To discuss the correlation between polymorphism of rs266729 (-11377C/G, Cytosine/Guanine) (adiponectin promoter) site and atherosclerotic plaque compositions as well as related indicators under intravascular ultrasound (IVUS). PATIENTS AND METHODS: 76 patients with coronary heart disease from December 2014 to December 2016 were enrolled. The PCR-RFLP method was used to analyze the adiponectin gene polymorphism in rs266729 site. All the objects were divided into CC type group (n=26), CG type group (n=23), and GG type group (n=27) according to the results of polymorphism...
September 2018: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/30279873/different-behaviors-of-bioresorbable-vascular-scaffold-in-different-types-of-calcified-lesion-insights-from-intravascular-imaging
#9
Satoru Mitomo, Akihito Tanaka, Luciano Candilio, Lorenzo Azzalini, Mauro Carlino, Azeem Latib, Antonio Colombo
A 55-year-old male underwent percutaneous coronary intervention (PCI) for left anterior descending artery chronic total occlusion. After lesion preparation with non-compliant (NC) balloon, two bioresorbable vascular scaffolds (2.5/28 mm, 3.0/28 mm, Absorb BVS, Abbott Vascular, Santa Clara, CA, USA) were implanted followed by 1:1 sized NC balloon post-dilatation at 20 atm. Final intravascular ultrasound (IVUS) showed acceptable BVS expansion in diffusely calcified lesions. Twenty-one months' follow-up coronary angiography revealed severe restenosis with reocclusion at the distal edge of the distal BVS...
April 2018: Journal of Cardiology Cases
https://www.readbyqxmd.com/read/30279864/time-course-of-restenosis-with-black-hole-on-intravascular-ultrasound-after-implantation-of-platinum-chromium-everolimus-eluting-stent-assessment-using-optical-frequency-domain-imaging
#10
Shinnosuke Kikuchi, Yukiko Morita, Masahiko Kanna, Toru Dejima, Mina Nakayama, Yuichi Okajima, Kiyoshi Hibi, Kazuo Kimura, Kouichi Tamura
Management of in-stent restenosis (ISR) remains challenging even in the drug-eluting stent era. We report the case of a Japanese female with repeated ISR after primary percutaneous coronary intervention (PCI) for acute coronary syndrome. We observed ISR tissue with "black hole" on intravascular ultrasound, which appeared to be heterogeneous tissue on optical frequency-domain imaging (OFDI). Paclitaxel-coated balloon dilatation of the ISR lesion with "black hole" was ineffective. The morphological assessment of ISR tissue using OFDI might be important to treat ISR lesions by PCI...
March 2018: Journal of Cardiology Cases
https://www.readbyqxmd.com/read/30279834/successful-angioplasty-with-intravascular-ultrasound-and-optical-frequency-domain-imaging-guidance-for-tandem-intramural-hematoma-caused-by-coronary-artery-spasm
#11
Mitsuru Kahata, Masato Otsuka, Shohei Kataoka, Kyoichiro Yazaki, Asako Kumagai, Koji Inoue, Hiroshi Koganei, Kenji Enta, Yasuhiro Ishii
A 39-year-old woman with no coronary risk factors was admitted due to repetitive morning chest pain. Coronary angiography revealed subtotal occlusion of the distal obtuse marginal branch that was not recanalized by intracoronary nitroglycerin administration. Intravascular ultrasound and optical frequency domain imaging showed tandem intramural hematomas in the culprit vessel. We performed cutting balloon angioplasty successfully with dual intracoronary imaging modality guidance. The 4-month follow-up angiography revealed favorable vascular healing and the provocation test induced multiple spasms, including in the culprit vessel, by intracoronary acetylcholine administration...
December 2017: Journal of Cardiology Cases
https://www.readbyqxmd.com/read/30279741/mri-and-histological-evaluation-of-pulsed-focused-ultrasound-and-microbubbles-treatment-effects-in-the-brain
#12
Zsofia I Kovacs, Tsang-Wei Tu, Maggie Sundby, Farhan Qureshi, Bobbi K Lewis, Neekita Jikaria, Scott R Burks, Joseph A Frank
Magnetic resonance imaging (MRI)-guided pulsed focused ultrasound (pFUS) combined with microbubbles (MB) contrast agent infusion has been shown to transiently disrupt the blood-brain barrier (BBBD), increasing the delivery of neurotherapeutics to treat central nervous system (CNS) diseases. pFUS interaction with the intravascular MB results in acoustic cavitation forces passing through the neurovascular unit (NVU), inducing BBBD detected on contrast-enhanced MRI. Multiple pFUS+MB exposures in Alzheimer's disease (AD) models are being investigated as a method to clear amyloid plaques by activated microglia or infiltrating immune cells...
2018: Theranostics
https://www.readbyqxmd.com/read/30277641/coronary-fractional-flow-reserve-derived-from-intravascular-ultrasound-imaging-validation-of-a-new-computational-method-of-fusion-between-anatomy-and-physiology
#13
Cristiano G Bezerra, Alexandre Hideo-Kajita, Carlos A Bulant, Gonzalo D Maso-Talou, Jose Mariani, Fabio A Pinton, Breno A A Falcão, Antônio Esteves-Filho, Marcelo Franken, Raúl A Feijóo, Roberto Kalil-Filho, Hector M Garcia-Garcia, Pablo J Blanco, Pedro A Lemos
OBJECTIVES: To evaluate the diagnostic performance of a novel computational algorithm based on three-dimensional intravascular ultrasound (IVUS) imaging in estimating fractional flow reserve (IVUSFR ), compared to gold-standard invasive measurements (FFRINVAS ). BACKGROUND: IVUS provides accurate anatomical evaluation of the lumen and vessel wall and has been validated as a useful tool to guide percutaneous coronary intervention. However, IVUS poorly represents the functional status (i...
September 12, 2018: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/30277462/pre-infarction-angina-and-culprit-lesion-morphologies-in-patients-with-a-first-st-segment-elevation-acute-myocardial-infarction-insights-from-in-vivo-optical-coherence-tomography
#14
Rong Sun, Sining Hu, Giulio Guagliumi, Haibo Jia, Jinwei Tian, Lulu Li, Shaotao Zhang, Yini Wang, Shaosong Zhang, Jingbo Hou, Bo Yu
AIMS: This study aimed to evaluate the relationship between pre-infarction angina (PIA) and in vivo culprit lesion characteristics as assessed by intravascular optical coherence tomography (OCT) in patients with a first ST-segment elevation myocardial infarction (STEMI). METHODS AND RESULTS: A total of 305 consecutive patients with a first STEMI who underwent OCT imaging of culprit lesions during primary percutaneous coronary intervention (PCI) were prospectively enrolled...
October 2, 2018: EuroIntervention
https://www.readbyqxmd.com/read/30270314/optical-frequency-domain-imaging-and-intravascular-ultrasound-for-adult-onset-kawasaki-disease-in-the-sub-acute-phase
#15
Toshiki Kuno, Akimichi Shibata, Masaki Kodaira, Yohei Numasawa
No abstract text is available yet for this article.
September 29, 2018: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/30269287/coronary-thrombosis-in-acute-pancreatitis
#16
Saagar Sanghvi, Fahad Waqar, Mohamed Effat
The incidence of acute myocardial infarction in the setting of acute pancreatitis is very rare. The recognition of such complex diagnosis may be clinically challenging, as the symptoms of both conditions are often indistinguishable. We report a case in which we encountered both conditions concurrently, and hypothesize that the ambient inflammatory and pro-thrombotic milieu of acute pancreatitis resulted in acute coronary thrombosis despite the absence of significant coronary atherosclerosis. Among multiple coronary imaging modalities currently in use, optimal cohesion tomography provided a unique capability for direct visualization of the coronary thrombus...
September 29, 2018: Journal of Thrombosis and Thrombolysis
https://www.readbyqxmd.com/read/30268302/the-role-of-intraoperative-fluorescence-imaging-during-esophagectomy
#17
REVIEW
Simon R Turner, Daniela R Molena
Intraoperative fluorescence imaging (FI) with indocyanine green has several potential uses during esophagectomy. Intravascular injection for enhancing the visualization of conduit vascularity and assessing macro and microperfusion has the most literature support and may help reduce anastomotic leaks. Peritumoral injection has been reported for use in identifying sentinel nodes during lymphadenectomy and intralymphatic injection may be used to help preserve or ligate the thoracic duct. The authors' own technique of FI for conduit assessment is described...
November 2018: Thoracic Surgery Clinics
https://www.readbyqxmd.com/read/30267024/comprehensive-intravascular-imaging-of-atherosclerotic-plaque-in-vivo-using-optical-coherence-tomography-and-fluorescence-lifetime-imaging
#18
Min Woo Lee, Joon Woo Song, Woo Jae Kang, Hyeong Soo Nam, Tae Shik Kim, Sunwon Kim, Wang-Yuhl Oh, Jin Won Kim, Hongki Yoo
Comprehensive imaging of both the structural and biochemical characteristics of atherosclerotic plaque is essential for the diagnosis and study of coronary artery disease because both a plaque's morphology and its biochemical composition affect the level of risk it poses. Optical coherence tomography (OCT) and fluorescence lifetime imaging (FLIm) are promising optical imaging methods for characterizing coronary artery plaques morphologically and biochemically, respectively. In this study, we present a hybrid intravascular imaging device, including a custom-built OCT/FLIm system, a hybrid optical rotary joint, and an imaging catheter, to visualize the structure and biochemical composition of the plaque in an atherosclerotic rabbit artery in vivo...
September 28, 2018: Scientific Reports
https://www.readbyqxmd.com/read/30265435/cardiac-allograft-vasculopathy-a-review
#19
Michael S Lee, Rigved V Tadwalkar, William F Fearon, Ajay J Kirtane, Amisha J Patel, Chetan B Patel, Ziad Ali, Sunil V Rao
Cardiac allograft vasculopathy (CAV) is a complex disease that remains a significant cause of morbidity and mortality after orthotopic heart transplantation (OHT). Originating as a result of inflammatory response, the development and progression of CAV is attributed to endothelial dysfunction, cellular infiltration, and a wide-range of genetic and patient factors. The detection of CAV remains a diagnostic challenge, as symptoms can be variable or absent. While coronary angiography remains the initial test of choice for the diagnosis and surveillance of CAV, intravascular imaging (either by ultrasound or optical coherence tomography) and physiologic assessments are useful adjuncts in the cardiac catheterization laboratory...
September 28, 2018: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/30258668/automatic-analysis-of-bioresorbable-vascular-scaffolds-in-intravascular-optical-coherence-tomography-images
#20
Yihui Cao, Qinhua Jin, Yifeng Lu, Jing Jing, Yundai Chen, Qinye Yin, Xianjing Qin, Jianan Li, Rui Zhu, Wei Zhao
The bioresorbable vascular scaffold (BVS) is a new generation of bioresorbable scaffold (BRS) for the treatment of coronary artery disease. A potential challenge of BVS is malapposition, which may possibly lead to late stent thrombosis. It is therefore important to conduct malapposition analysis right after stenting. Since an intravascular optical coherence tomography (IVOCT) image sequence contains thousands of BVS struts, manual analysis is labor intensive and time consuming. Computer-based automatic analysis is an alternative, but faces some difficulties due to the interference of blood artifacts and the uncertainty of the struts number, position and size...
June 1, 2018: Biomedical Optics Express
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