Intracranial aneurysms: diagnostic accuracy of three-dimensional, Fourier transform, time-of-flight MR angiography.

Korogi, Yukunori; Takahashi, Masashi; Mabuchi, Nobuhisa; Miki, Hitoshi; Fujiwara, Satoru; Horikawa, Yo; Nakagawa, Toshio; O’uchi, Toshihiro; Watabe, T; Shiga, Hayao

doi:10.1148/radiology.193.1.8090889

Cited by 77 publications

(27 citation statements)

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“…The most common application of 3D TOF is intracranial angiography (25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35)(36). In particular, 3D TOF has been used for diagnostic imaging of intracranial occlusions (32,33) as well as aneurysms (34,35).…”

Section: Applicationsmentioning

confidence: 99%

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Non‐contrast enhanced MR angiography: Physical principles

Wheaton

Miyazaki

2012

Magnetic Resonance Imaging

140

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Noncontrast‐enhanced magnetic resonance angiography (NCE‐MRA) methods have been demonstrated in anatomies throughout the body. Previously established NCE‐MRA techniques suffered from long scan times or low sensitivity. Advances in hardware and software have made NCE‐MRA scan times clinically feasible. Recent concerns over the safety of gadolinium‐based contrast material combined with the expense of the material and its administration have generated a demand for NCE‐MRA. In response, several new NCE‐MRA methods have been developed. The physical mechanisms underlying five general classes of NCE‐MRA methods (inflow effect, flow‐dependency on cardiac phase, flow‐encoding, spin labeling, and relaxation) are explained. The original techniques of time‐of‐flight (TOF) and phase contrast MRA (PC‐MRA) are briefly introduced. New developments in NCE‐MRA, including hybrid of opposite‐contrast (HOP‐MRA), four dimensional PC‐MRA (4D Flow), cardiac‐gated 3D fast‐spin‐echo, flow‐sensitive dephasing (FSD), arterial spin labeling (ASL), and balanced steady‐state free‐precession (bSSFP) are highlighted. The primary applications, advantages, and limitations of established and emerging NCE‐MRA techniques are discussed. J. Magn. Reson. Imaging 2012;36:286–304. © 2012 Wiley Periodicals, Inc.

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Section: Applicationsmentioning

confidence: 99%

“…In particular, 3D TOF has been used for diagnostic imaging of intracranial occlusions (32,33) as well as aneurysms (34,35). The high resolution of the 3D acquisition provides excellent depiction of small intracranial vessels.…”

Section: Applicationsmentioning

confidence: 99%

Non‐contrast enhanced MR angiography: Physical principles

Wheaton

Miyazaki

2012

Magnetic Resonance Imaging

140

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“…TOF MRA provides information on vessel conformation and functional information, and allows high definition images of blood vessels within a relatively short time. These attributes have spurred its popularity [10][11][12][13]. TOF MRA produces a low signal by saturating the signal from a stationary object, and uses blood flow to yield a contrast difference between stationary anatomical objects and blood vessels [13].…”

Section: Discussionmentioning

confidence: 99%

“…These attributes have spurred its popularity [10][11][12][13]. TOF MRA produces a low signal by saturating the signal from a stationary object, and uses blood flow to yield a contrast difference between stationary anatomical objects and blood vessels [13]. Therefore, in TOF MRA variables related to imaging technique and fluid property may affect the images.…”

Section: Discussionmentioning

confidence: 99%

“…The difference between the stationary and flow matter is bigger than the difference of signal loss from the phase difference [15]. The difference in measured length from different devices is probably due to the variables related to the imaging techniques, which include repetition time, echo time, flip angle, slice thickness, and the matrix [13]. In this study there were difference in the repetition time, echo time, and matrix between the two Tesla techniques due to the difference in the default signal-to-noise ratio and difference in relaxation time according to the magnetic field strength.…”

Section: Discussionmentioning

confidence: 99%

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Accuracy Analysis of Magnetic Resonance Angiography and Computed Tomography Angiography Using a Flow Experimental Model

Heo¹,

Lee²,

Park³

et al. 2015

Journal of Magnetics

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This study investigated the accuracy of magnetic resonance angiography (MRA) and computed tomography angiography (CTA) in terms of reflecting the actual vascular length. Three-dimensional time of flight (3D TOF) MRA, 3D contrast-enhanced (CE) MRA, volume-rendering after CTA and maximum intensity projection were investigated using a flow model phantom with a diameter of 2.11 mm and area of 0.26 cm 2 . 1.5 and 3.0 Tesla devices were used for 3D TOF MRA and 3D CE MRA. CTA was investigated using 16 and 64 channel CT scanners, and the images were transmitted and reconstructed by volume-rendering and maximum intensity projection, followed by conduit length measurement as described above. The smallest 3D TOF MRA measure was 2.51 ± 0.12 mm with a flow velocity of 40 cm/s using the 3.0 Tesla apparatus, and 2.57 ± 0.07 mm with a velocity of 71.5 cm/s using the 1.5 Tesla apparatus; both images were magnified from the actual measurement of 2.11 mm. The measurement with the 16 channel CT scanner was smaller (3.83 ± 0.37 mm) than the reconstructed image on maximum intensity projection. The images from CTA from examination apparatus and reconstruction technique were all larger than the actual measurement.

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Time‐of‐flight MR‐angiography with a helical trajectory and slice‐super‐resolution reconstruction

Okanovic

Hillig

Breuer

et al. 2018

Magnetic Resonance in Med

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Intracranial aneurysms: diagnostic accuracy of three-dimensional, Fourier transform, time-of-flight MR angiography.

Abstract: MR angiography can depict intracranial aneurysms 5 mm or larger with good accuracy but is less useful for the identification of smaller aneurysms.

Cited by 77 publications

References 0 publications

Non‐contrast enhanced MR angiography: Physical principles

Non‐contrast enhanced MR angiography: Physical principles

Accuracy Analysis of Magnetic Resonance Angiography and Computed Tomography Angiography Using a Flow Experimental Model

Time‐of‐flight MR‐angiography with a helical trajectory and slice‐super‐resolution reconstruction

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