Echo Train Length (ETL) refers to the number of echoes collected in a single repetition time (TR) during a fast spin echo MRI sequence, which directly impacts image quality and acquisition time. A longer ETL can reduce scan time but may compromise image contrast and resolution due to increased T2 decay effects.

Echo Train Length

number of echoes

Repetition time (TR) is a crucial parameter in magnetic resonance imaging (MRI) that refers to the time interval between successive pulse sequences applied to the same slice. It influences the contrast and signal-to-noise ratio of the image, playing a significant role in determining the type of tissue contrast obtained in MRI scans.

repetition time

fast spin echo MRI sequence

Image quality refers to the perceived clarity, detail, and visual fidelity of an image, often influenced by factors such as resolution, color accuracy, and noise. It is crucial in various fields such as photography, medical imaging, and digital media, where high image quality can significantly impact the effectiveness and interpretation of visual information.

image quality

Acquisition time refers to the duration required to obtain sufficient data or information to achieve a particular objective, often in contexts like imaging, data collection, or learning. Optimizing acquisition time is crucial for efficiency, cost-effectiveness, and ensuring high-quality results in various applications such as medical imaging, market research, and machine learning.

acquisition time

scan time

Image contrast refers to the difference in luminance or color that makes an object distinguishable within an image. High contrast images have a wide range of tones, while low contrast images have a narrow range, affecting the visibility of details and the overall perception of the image.

image contrast

Image resolution refers to the amount of detail an image holds, typically measured in pixels per inch (PPI) for digital images or dots per inch (DPI) for printed images. Higher resolution means more pixels, resulting in clearer and more detailed images, but also larger file sizes and increased processing requirements.

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