从SPECT投影中约束IntraSPECT重建

1993 IEEE Conference Record Nuclear Science Symposium and Medical Imaging Conference Pub Date : 1993-10-31 DOI:10.1109/NSSMIC.1993.373561

S. Manglos, T. M. Young

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引用次数: 33

摘要

提出了一种新的层析图像重建方法，称为“本征传输SPECT”或简称“IntraSPECT”。它仅使用SPECT投影同时重建衰减图(/spl mu/)和衰减补偿活动图(A)。开发了一种改进的art算法(ART-IntraSPECT)，并在模拟胸腔中进行了测试。ART-IntraSPECT重建的/spl mu/-图像清晰地显示了所有相关的解剖结构，如肺和脊柱与软组织。然而，A和/spl mu/-图像在定量上都不准确。通过对/spl mu/-image.>应用合理的组织类型约束，精度得到了显著提高

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Constrained IntraSPECT reconstruction from SPECT projections

A new method is presented for tomographic image reconstruction, called "Intrinsic Transmission SPECT" or just "IntraSPECT". It simultaneously reconstructs both the attenuation map (/spl mu/) and an attenuation-compensated activity map (A), using only the SPECT projections. A modified ART-algorithm (ART-IntraSPECT) was developed and tested with a simulated thorax. The /spl mu/-image reconstructed with ART-IntraSPECT clearly exhibited all relevant anatomical structure, such as lungs and spine vs soft tissue. However, both A and /spl mu/-images were quantitatively inaccurate. The accuracy was considerably improved by applying reasonable tissue-type constraints to the /spl mu/-image.<>

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1993 IEEE Conference Record Nuclear Science Symposium and Medical Imaging Conference

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