Right and left lung perfusion: in vitro and in vivo validation with oblique-angle, velocity-encoded cine MR imaging.

Caputo, Gary R.; Kondo, Chisato; Masui, Takayuki; Geraci, Salvatore; Foster, Elyse; O’Sullivan, Margaret; Higgins, Charles B.

doi:10.1148/radiology.180.3.1871279

Cited by 122 publications

(37 citation statements)

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“…5,6 Figure 1A illustrates the positioning of a 2D phase-contrast slice through the ICAs and the BA. Several studies have shown that phase-contrast MR angiography is a reliable method to quantify volume flow 15,[26][27][28]40,54,57,62 and provides a useful, noninvasive technique to investigate flow changes in patients. 9,12,13,44,[66][67][68] On an independent workstation, quantitative flow values were calculated from the phase-contrast images by using interactive data language-based custom software (Cinetool version 4, General Electric Healthcare).…”

Section: Magnetic Resonance Angiographymentioning

confidence: 99%

Magnetic resonance imaging for quantitative flow measurement in infants with hydrocephalus: a prospective study

Leliefeld¹,

Gooskens²,

Vincken

et al. 2008

PED

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Object Raised intracranial pressure (ICP) that is associated with hydrocephalus may lead to alterations in cerebral hemodynamics and ischemic changes in the brain. In infants with hydrocephalus, defining the right moment for surgical intervention based on clinical signs alone can sometimes be a difficult task. Clinical signs of raised ICP are known to be unreliable and sometimes even misleading. Furthermore, when sutures are closed, ICP does not always correlate with the size of the ventricles or with the clinical signs or symptoms. In this study the authors investigated whether cerebral blood flow (CBF) can be measured by using quantitative MR angiography in infants with progressive hydrocephalus. In addition, the authors investigated the relationship between CBF and ICP, before and after cerebrospinal fluid (CSF) diversion. Methods Fifteen infants with progressive hydrocephalus (age range 1 day–7 months) were examined. All patients underwent anterior fontanel pressure measurement, MR angiography, and mean arterial blood pressure measurements before and after CSF diversion. Brain volume was measured to compensate for the physiological increase in CBF during brain maturation in infants. Results The mean preoperative ICP was 19.1 ± 8.4 cm H2O (± standard deviation). The mean postoperative ICP was 6.7 ± 4.0 cm H2O (p < 0.005). The mean preoperative CBF was 25.7 ± 11.3 ml/100 cm3 brain/min. After CSF diversion, CBF increased to 50.1 ± 12.1 ml/100 cm3 brain/min (p < 0.005). The mean arterial blood pressure did not change after surgical intervention. Conclusions Magnetic resonance imaging can be used to measure CBF in infants with hydrocephalus. Raised ICP was related to a decrease in CBF. After CSF diversion, CBF and ICP improved to values within the normal range.

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Section: Magnetic Resonance Angiographymentioning

confidence: 99%

Magnetic resonance imaging for quantitative flow measurement in infants with hydrocephalus: a prospective study

Leliefeld¹,

Gooskens²,

Vincken

et al. 2008

PED

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“…However, it is difficult to use this method in pediatric patients. Caputo et al performed phantom experiments that showed that cardiac output measured using VEC-MRI was slightly lower than the values obtained using echocardiography [18]. Kuehne et al used swine in their comparison between VEC-MRI and thermodilution, but to our knowledge, almost no studies have been conducted on pediatric patients [19].…”

Section: Investigation Of Usefulness In Pediatric Patientsmentioning

confidence: 99%

Assessment of Hemodynamics by Magnetic Resonance Imaging

Sugimoto

2014

Congenital Heart Disease

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In recent years, remarkable technological revolutions in cMRI methods have made it possible to better ascertain patients' conditions. For example, cine MRI makes it possible to take moving images while the patient is holding their breath, has excellent time resolution, and easily and accurately evaluates cardiac function. Compared to echocardiography, it provides a superior visual overview of blood vessels and allows the user to freely obtain section images without the interference of bones, the lungs, and other structures. The use of phase contrast technique makes it possible to perform quantitative evaluation of shunt volume and all types of valvular regurgitation. An imaging technique that allows the imaging of myocardial strain has also been developed, which has further improved the ability of MRI to evaluate cardiac function and cardiac wall motion. When MRI contrast medium is used, MRI is superior to myocardial scintigraphy for the diagnosis of myocardial ischemia, myocardial infarction, and cardiomyopathy. Currently, cMRI is an essential tool for the evaluation of cardiac function in the field of pediatric cardiology.

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“…The most widely used pulse sequence is a retrospective ECG-triggered cine phase contrast (PC), also known as velocity-encoded cine MRI (Brenner et al 1992;Caputo et al 1991;Helbing et al 1996;Hundley et al 1995;Powell and Geva 2000;Rebergen et al 1993aRebergen et al , b, 1995Sieverding et al 1992;Steffens et al 1994). The accuracy of this technique has been validated both in vitro and in vivo (Bogren et al 1989;Evans et al 1993;Firmin et al 1987;Frayne et al 1995;Kondo et al 1991a, b;Greil et al 2002a, b).…”

Section: Flow Quantificationmentioning

confidence: 99%