The Direction of Flow and Phase-encoding Schemes Effects on Signal Intensity in T1-weighted Inversion Recovery TurboFLASH Images

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NAZARPOOR MAHMOOD

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Journal Paper

Paper Information

Journal: JOURNAL OF BIOMEDICAL PHYSICS AND ENGINEERING Year:2023 | Volume:13 | Issue:1 Page(s): 45-54

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Title

The Direction of Flow and Phase-encoding Schemes Effects on Signal Intensity in T1-weighted Inversion Recovery TurboFLASH Images

Author(s)

NAZARPOOR MAHMOOD | Issue Writer Certificate

Keywords

Perfusion

Cerebrovascular Circulation

Signal-To-Noise Ratio

Inversion Recovery

Contrast Agent

Flow Measurement

Linear Phase-Encoding

Center Out Phase-Encoding

Abstract

Background: It is needed to minimize the effect of flow direction on the desired area, such as arterial input function (AIF) in magnetic resonance imaging (MRI). Objective: The current study aimed to investigate the effect of flow direction on different velocities (0–, 80. 39 cm/s) for the strength of the signal intensity (SI) at the linear phase-encoding (LPE) and the center out phase-encoding (COPE) schemes and to recommend the best flow direction in a selected slice and scheme for absolute perfusion measurement by inversion recovery T1-weighted turbo fast low-angle shot (TurboFLASH) MR images. Material and Methods: In this experimental study, the flow rates were measured using a flow phantom, and the signal intensity (SI) was measured at the two opposite flow directions in the Z-axis perpendicular to the coronal image at a concentration of 0. 8 mmol/L of gadolinium-diethylenetriaminepantaacetic acid (Gd-DTPA) by using the LPE and COPE schemes. Results: The increase in velocity along with the growth in SI and inflow affected the use of LPE and COPE acquisitions in both directions. The velocity of the arterial input function is needed to calculate the inflow correction factor by using two schemes in two opposite flow directions to investigate perfusion. Conclusion: The COPE scheme was better than the LPE scheme in measuring perfusion since the velocity and direction of blood flow affect SI less.

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APA: Copy

NAZARPOOR, MAHMOOD. (2023). The Direction of Flow and Phase-encoding Schemes Effects on Signal Intensity in T1-weighted Inversion Recovery TurboFLASH Images. JOURNAL OF BIOMEDICAL PHYSICS AND ENGINEERING, 13(1), 45-54. SID. https://sid.ir/paper/1099586/en

Vancouver: Copy

NAZARPOOR MAHMOOD. The Direction of Flow and Phase-encoding Schemes Effects on Signal Intensity in T1-weighted Inversion Recovery TurboFLASH Images. JOURNAL OF BIOMEDICAL PHYSICS AND ENGINEERING[Internet]. 2023;13(1):45-54. Available from: https://sid.ir/paper/1099586/en

IEEE: Copy

MAHMOOD NAZARPOOR, “The Direction of Flow and Phase-encoding Schemes Effects on Signal Intensity in T1-weighted Inversion Recovery TurboFLASH Images,” JOURNAL OF BIOMEDICAL PHYSICS AND ENGINEERING, vol. 13, no. 1, pp. 45–54, 2023, [Online]. Available: https://sid.ir/paper/1099586/en

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