Microangiography

Microangiography
Purposeradiography of small blood or lymphatic vessel

Microangiography (/ˌmaɪkroʊˌændʒiˈɒɡrəfi/ MY-kroh-AN-jee-OG-rə-fee) [1] is a type of angiography that consists of the radiography of small blood or lymphatic vessels of an organ. While most other types of angiography cannot produce images of vessels smaller than 200 μm in diameter, microangiography does just that.[2] A microangiographic image is the result of injection of a contrast medium into either the blood or the lymphatic system and, then, enlargement of the resulting radiograph. Thus, an image is obtained in which there is contrast between vessel and surrounding tissue. It is often used in order to detect microvascular lesions in organs. But, it has been suggested that microangiography can also be used to detect tumors through visualization of tumor-induced small blood vessels. This is because tumor growths require vascularization before they can develop more rapidly.[3] A few of the commonly used types are fluorescent, silicone rubber, and synchrotron radiation microangiography.

Common types

Fluorescent microangiography

Also known as FMA, fluorescent microangiography is used to visualize and quantify changes in microvasculature.[4] It is different from other types of microangiography in that a fluorescent marker or contrast medium is used instead of something else. Fluorescein and indocyanine green are often used for this purpose.[citation needed]

Laser Doppler holography

Laser Doppler imaging by digital holography reveals retinal blood flow non invasively in the eye fundus [5].

Computational imaging with lasers, ultrahigh-speed cameras, commodity graphics cards, and state-of-the-art statistical filtering algorithms, emerges as a competitive alternative to dye angiographies. This class of non-invasive microangiography techniques can be advantageously applied to the eye fundus to reveal endoluminal blood flow profiles in the retina and choroid.[6] Laser Doppler imaging by holography provides high-contrast visualization of local blood flow in choroidal vessels in humans, with a spatial resolution comparable to state-of-the-art indocyanine green angiography.[citation needed]

Silicone rubber microangiography

This type of microangiography produces a three-dimensional image that depicts the distribution of vasculature in a tissue. It is commonly used to determine changes in microvasculature.[citation needed]

Synchrotron radiation microangiography

This type of microangiography uses monochromatic synchrotron radiation and a high-definition video system to provide an image of small collateral arteries with a diameter less than 100 μm.[2]

See also

References

  1. ^ "microangiography". The Free Dictionary.
  2. ^ a b Takeshita, Satoshi; Isshiki, Takaaki; Mori, Hidezo; Tanaka, Etsuro; Eto, Koji; Miyazawa, Yoshimichi; Tanaka, Akira; Shinozaki, Yoshiro; Hyodo, Kazuyuki; Ando, Masami; Kubota, Misao; Tanioka, Kenkichi; Umetani, Keiji; Ochiai, Masahiko; Sato, Tomohide; Miyashita, Hideo (1997). "Use of Synchrotron Radiation Microangiography to Assess Development of Small Collateral Arteries in a Rat Model of Hindlimb Ischemia". Circulation. 95 (4): 805–808. doi:10.1161/01.CIR.95.4.805. PMID 9054734. Retrieved 2009-06-10.
  3. ^ "Micro-angiography for tumor vessel imaging" (PDF). Retrieved 2009-06-10.
  4. ^ Bollinger A, Amann-Vesti BR (June 2007). "Fluorescence microlymphography: diagnostic potential in lymphedema and basis for the measurement of lymphatic pressure and flow velocity". Lymphology. 40 (2): 52–62. PMID 17853615.
  5. ^ Puyo, Léo, Michel Paques, Mathias Fink, José-Alain Sahel, and Michael Atlan. "Choroidal vasculature imaging with laser Doppler holography." Biomedical optics express 10, no. 2 (2019): 995-1012.
  6. ^ Puyo, L., M. Paques, M. Fink, J-A. Sahel, and M. Atlan. "In vivo laser Doppler holography of the human retina." Biomedical optics express 9, no. 9 (2018): 4113-4129.

Read other articles:

Elizabeth II

Queen of the United Kingdom from 1952 to 2022 Elizabeth of the United Kingdom redirects here. For other uses, see Elizabeth of the United Kingdom (disambiguation) and Elizabeth II (disambiguation). Elizabeth IIHead of the CommonwealthFormal portrait, 1959Queen of the United Kingdomand other Commonwealth realms (full list) Reign6 February 1952 – 8 September 2022Coronation2 June 1953PredecessorGeorge VISuccessorCharles IIIBornPrincess Elizabeth of Yo...

 

 

ألفريدو ميخيا

ألفريدو ميخيا (بالإسبانية: Alfredo Antonio Mejía Escobar)‏    معلومات شخصية الميلاد 3 أبريل 1990 (العمر 33 سنة) الطول 1.83 م (6 قدم 0 بوصة) مركز اللعب وسط الجنسية هندوراس  معلومات النادي النادي الحالي ليفادياكوس الرقم 12 المسيرة الاحترافية1 سنوات فريق م. (هـ.) 2010–2012 ريال إسبانيا 52 (...

 

 

Bradford-with-Beswick

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: Bradford-with-Beswick – news · newspapers · books · scholar · JSTOR (January 2021) (Learn how and when to remove this template message) Manchester parish map with Beswick in the center, abbreviated Bk An early 20th-century Ordnance Survey map of Manchester Bes...

Pennsylvania's 8th congressional district

U.S. House district for Pennsylvania Pennsylvania's 8th congressional districtInteractive map of district boundaries since January 3, 2023Representative  Matt CartwrightD–MoosicPopulation (2022)766,586Median householdincome$63,172Ethnicity74.6% White13.2% Hispanic6.3% Black3.3% Two or more races2.0% Asian0.6% otherCook PVIR+4[1] Pennsylvania's 8th congressional district is located in the northeastern region of the state. It encompasses all of Wayne, Pike, and Lackawanna Countie...

 

 

Spectral density

Relative importance of certain frequencies in a composite signal This article is about signal processing and relation of spectra to time-series. For further applications in the physical sciences, see Spectrum (physical sciences). Spectral power density redirects here. Not to be confused with Spectral power. The spectral density of a fluorescent light as a function of optical wavelength shows peaks at atomic transitions, indicated by the numbered arrows. The voice waveform over time (left) has...

 

 

Manuel Rosas Arreola

Questa voce sull'argomento calciatori messicani è solo un abbozzo. Contribuisci a migliorarla secondo le convenzioni di Wikipedia. Segui i suggerimenti del progetto di riferimento. Manuel Rosas Arreola Nazionalità  Messico Nicaragua (dal 2013) Altezza 181 cm Calcio Ruolo Centrocampista Squadra  Real Estelí Carriera Squadre di club1 2011- Real Estelí141 (13) Nazionale 2013- Nicaragua30 (2) 1 I due numeri indicano le presenze e le reti segnate, per le sole partite ...

Немезида

У этого термина существуют и другие значения, см. Немезида (значения). Немезидадр.-греч. Νέμεσις Мифология древнегреческая религия Сфера влияния наказание Пол женский Отец Эреб или Океан Мать Нюкта[1][2] или Тефида Дети Тельхины и Елена Прекрасная В иных кул�...

 

 

Nationale Volksarmee

Pour les articles homonymes, voir Armée populaire et Armée allemande. Armée populaire nationaleNationale Volksarmee Insigne de la NVA Fondation 1956 Dissolution 1990 Branches Landstreitkräfte (terre) Luftstreitkräfte (air) Volksmarine (marine) Quartier-général Berlin-Est (Strausberg) Main-d'œuvre Âges militaires 18 ans Actifs 155 319 (1989) Articles annexes Histoire Histoire militaire de l'Allemagne modifier  Garde d'honneur du régiment de la garde Friedrich-Engels de la ...

 

 

Thailand national under-17 football team

Team representing Thailand in international U-17 football competitions Thailand Under-17Nickname(s)ช้างศึก (Changsuek)(War elephants)AssociationFootball Association of ThailandConfederationAFC (Asia)Sub-confederationAFF (Southeast Asia)Head coachChayakorn Tanaddernkao (Interim)CaptainPacharaphol LekkunHome stadiumRajamangala StadiumFIFA codeTHA First colours Second colours Third colours FIFA U-17 World CupAppearances2 (first in 1997)Best resultRound 1 (1997, 1999)AFC U-17 Asian ...

East Tisted

Human settlement in EnglandEast TistedVillage pond at East TistedEast TistedLocation within HampshirePopulation221 [1] 209 (2011 Census)[2]OS grid referenceSU701322Civil parishEast TistedDistrictEast HampshireShire countyHampshireRegionSouth EastCountryEnglandSovereign stateUnited KingdomPost townAltonPostcode districtGU34PoliceHampshire and Isle of WightFireHampshire and Isle of WightAmbulanceSouth Central UK ParliamentEast Hampshire List o...

 

 

Fleuve Noir Anticipation

Pour les articles homonymes, voir Fleuve Noir et FNA. Logo des éditions Fleuve Noir entre 1967 et 1977 Le FNA période fusée, le FNA période blanche, puis une partie des suites... ...ultérieures. Fleuve Noir Anticipation (FNA) est une collection consacrée à la science-fiction qui fut créée en septembre 1951 par l'éditeur Fleuve Noir. Elle visait un public populaire et privilégiait le space opera et les sujets grand public[1]. Elle eut une durée de vie exceptionnelle et publia deux...

 

 

2020年夏季奧林匹克運動會波蘭代表團

2020年夏季奥林匹克运动会波兰代表團波兰国旗IOC編碼POLNOC波蘭奧林匹克委員會網站olimpijski.pl（英文）（波兰文）2020年夏季奥林匹克运动会（東京）2021年7月23日至8月8日（受2019冠状病毒病疫情影响推迟，但仍保留原定名称）運動員206參賽項目24个大项旗手开幕式：帕维尔·科热尼奥夫斯基（游泳）和马娅·沃什乔夫斯卡（自行车）[1]闭幕式：卡罗利娜·纳亚（皮划艇）&#...

Філософія

Частина серії проФілософіяLeft to right: Plato, Kant, Nietzsche, Buddha, Confucius, AverroesПлатонКантНіцшеБуддаКонфуційАверроес Філософи Епістемологи Естетики Етики Логіки Метафізики Соціально-політичні філософи Традиції Аналітична Арістотелівська Африканська Близькосхідна іранська Буддій�...

 

 

Філософія

Частина серії проФілософіяLeft to right: Plato, Kant, Nietzsche, Buddha, Confucius, AverroesПлатонКантНіцшеБуддаКонфуційАверроес Філософи Епістемологи Естетики Етики Логіки Метафізики Соціально-політичні філософи Традиції Аналітична Арістотелівська Африканська Близькосхідна іранська Буддій�...

 

 

Філософія

Частина серії проФілософіяLeft to right: Plato, Kant, Nietzsche, Buddha, Confucius, AverroesПлатонКантНіцшеБуддаКонфуційАверроес Філософи Епістемологи Естетики Етики Логіки Метафізики Соціально-політичні філософи Традиції Аналітична Арістотелівська Африканська Близькосхідна іранська Буддій�...

قسطور

قسطورمعلومات عامةصنف فرعي من حاكم روماني جزء من هرم المناصب الروماني الاسم الأصل quaestor, oris (باللاتينية) البلد روما القديمة الاختصاص روما القديمة الفترة الزمنية كلاسيكية قديمة تعديل - تعديل مصدري - تعديل ويكي بيانات جزء من سلسلة مقالات عنالسياسة في روما القديمة الفترات المم�...

 

 

Observatory

Location used for observing terrestrial or celestial events For other uses, see Observatory (disambiguation). See also: Observational astronomy The Sphinx Observatory on a mountain top in the Swiss Alps at 3,571 m (11,716 ft) An observatory is a location used for observing terrestrial, marine, or celestial events. Astronomy, climatology/meteorology, geophysics, oceanography and volcanology are examples of disciplines for which observatories have been constructed. Historically, obser...

 

 

Chris Van Hollen

American lawyer and politician (born 1959) For his father, see Christopher Van Hollen (diplomat). In this Dutch name, the surname is Van Hollen. Chris Van HollenOfficial portrait, 2017United States Senatorfrom MarylandIncumbentAssumed office January 3, 2017Serving with Ben CardinPreceded byBarbara MikulskiChair of the Democratic Senatorial Campaign CommitteeIn officeJanuary 3, 2017 – January 3, 2019LeaderChuck SchumerPreceded byJon TesterSucceeded byCatherine Cortez Mas...

وليد الحربي

هذه المقالة يتيمة إذ تصل إليها مقالات أخرى قليلة جدًا. فضلًا، ساعد بإضافة وصلة إليها في مقالات متعلقة بها. (أغسطس 2019) وليد الحربي معلومات شخصية الاسم الكامل وليد معلا الحربي الميلاد 1 فبراير 1986 (العمر 38 سنة)السعودية  الطول 1.73 م (5 قدم 8 بوصة) مركز اللعب ظهير يمين الجن�...

 

 

Primera B Nacional 2012-2013

Primera B Nacional 2012-2013 Competizione Primera B Nacional Sport Calcio Edizione 27ª Organizzatore AFA Date dal 10 agosto 2012al 17 giugno 2013 Luogo  Argentina Partecipanti 20 Formula Girone all'italiana Risultati Vincitore  Rosario Central(1º titolo) Promozioni  Rosario Central Gimnasia (LP) Olimpo Retrocessioni  Nueva Chicago Deportivo Merlo Statistiche Miglior marcatore Luis Rodríguez (20) Incontri disputati 380 Gol segnati 775 (2...