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Characterization of myocardial perfusion imaging systems - an extension of quality metrics 心肌灌注成像系统的特征--质量指标的延伸
IF 3.3 3区 医学 Q1 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING
Physica Medica-European Journal of Medical Physics
Pub Date : 2024-09-01 DOI: 10.1016/j.ejmp.2024.104510

Purpose

The aim of this study was to evaluate the performance of myocardial perfusion imaging (MPI) systems in detecting perfusion defects (PDs). The defect perfusion index (DPI) was introduced to extend and further advance the current MPI quality metrics.

Methods

An anthropomorphic phantom simulating normal and pathological myocardial perfusion conditions was imaged by various NaI-crystal detector systems with and without corrections for scatter (SC) and attenuation (AC) (Symbia, Symbia + SC, Symbia IQ + SCAC, Symbia IQ), and cadmium-zinc-telluride detector systems without corrections (DSPECT, D530c). The extent of PD and the summed score (SS) were obtained by comparing polar maps with ad hoc normal databases created for each MPI system by using phantom polar maps with normal perfusion. The segmental uptake (SU) and the global uniformity (GU) were evaluated. The DPI was calculated on segments included in the PD to minimize attenuation artifacts outside the PD. The 17 segmental model was used.

Results

The highest level of uniformity of polar map was obtained for Symbia IQ + SCAC. D530c showed the highest extent of PD and dependence of the extent on the PD position. It showed in general the lowest SU values and the highest GU due to attenuation artifacts. Nevertheless, D530c outperforms other MPI systems in terms of PD detection, showing the highest DPI value. DSPECT system showed the lowest SS value, and DPI values comparable to NaI-crystal detector systems.

Conclusion

The DPI can be evaluated to investigate the intrinsic ability of MPI systems to detect PDs, whatever the quantitative post-processing software used.

目的本研究旨在评估心肌灌注成像（MPI）系统在检测灌注缺损（PD）方面的性能。方法模拟正常和病理心肌灌注条件的拟人化模型，用不同的碘化钠晶体探测器系统（带或不带散射（SC）和衰减（AC）校正功能）（Symbia、Symbia + SC、Symbia IQ + SCAC、Symbia IQ）和不带校正功能的碲锌镉探测器系统（DSPECT、D530c）进行成像。通过使用正常灌注的幻影极坐标图，将极坐标图与为每种 MPI 系统创建的特设正常数据库进行比较，从而得出 PD 的范围和总分 (SS)。评估了节段摄取（SU）和全局均匀性（GU）。DPI 是根据 PD 中的节段计算的，以尽量减少 PD 以外的衰减伪影。结果 Symbia IQ + SCAC 获得的极坐标图均匀度最高。D530c 显示的极坐标范围最大，而且其范围与极坐标位置有关。总体而言，D530c 的 SU 值最低，衰减伪影导致的 GU 值最高。尽管如此，D530c 在 PD 检测方面仍优于其他 MPI 系统，显示出最高的 DPI 值。DSPECT系统的SS值最低，DPI值与NaI晶体探测器系统相当。
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IF 3.3 3区 医学 Q1 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING
Physica Medica-European Journal of Medical Physics
Pub Date : 2024-09-01 DOI: 10.1016/j.ejmp.2024.103486
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IF 3.3 3区 医学 Q1 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING
Physica Medica-European Journal of Medical Physics
Pub Date : 2024-09-01 DOI: 10.1016/j.ejmp.2024.103454
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IF 3.3 3区 医学 Q1 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING
Physica Medica-European Journal of Medical Physics
Pub Date : 2024-09-01 DOI: 10.1016/j.ejmp.2024.103471
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IF 3.3 3区 医学 Q1 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING
Physica Medica-European Journal of Medical Physics
Pub Date : 2024-09-01 DOI: 10.1016/j.ejmp.2024.103499
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IF 3.3 3区 医学 Q1 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING
Physica Medica-European Journal of Medical Physics
Pub Date : 2024-09-01 DOI: 10.1016/j.ejmp.2024.103466
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IF 3.3 3区 医学 Q1 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING
Physica Medica-European Journal of Medical Physics
Pub Date : 2024-09-01 DOI: 10.1016/j.ejmp.2024.103488
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Physica Medica-European Journal of Medical Physics
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Physica Medica-European Journal of Medical Physics
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Physica Medica-European Journal of Medical Physics
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