Pixel profile improvement by frequency sweeping in burst imaging

Yong Man Ro; Ho Kyung Kang; Kwan Jin Jung

doi:10.1117/12.349558

28 May 1999 Pixel profile improvement by frequency sweeping in burst imaging

Yong Man Ro, Ho Kyung Kang, Kwan Jin Jung

Proceedings Volume 3659, Medical Imaging 1999: Physics of Medical Imaging; (1999) https://doi.org/10.1117/12.349558
Event: Medical Imaging '99, 1999, San Diego, CA, United States

Abstract

A pixel profile in the conventional burst sequence is so poor that excited area by burst sequence is a small portion of a pixel. This causes poor signal to noise ratio in burst image. In this paper, a frequency sweeping of RF pulse for burst imaging sequence is proposed to improve pixel profile. A burst pulse train is shaped by linear or nonlinear frequency sweeping function so that all the spins within a pixel are excited, thereby improving the signal to noise ratio. It also shows that the pixel profiles are dependent on how the frequency sweep is made. Computer simulations with Bloch equation and experimental results obtained using a 1.0 T NMR imaging system are presented.

Citation Download Citation

Yong Man Ro, Ho Kyung Kang, and Kwan Jin Jung "Pixel profile improvement by frequency sweeping in burst imaging", Proc. SPIE 3659, Medical Imaging 1999: Physics of Medical Imaging, (28 May 1999); https://doi.org/10.1117/12.349558

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