Journals / Türk Kardiyoloji Derneği Arşivi / 2019 / Cilt: 47 - Sayı: 5

Comparison of automated quantification and semiquantitative visual analysis findings of IQ SPECT MPI with conventional coronary angiography in patients with stable angina

Konvansiyonel koroner anjiyografi ile IQ-SPECT kullanılarak yapılan otomatik ve görsel analiz yönteminin kararlı anjinalı hastalarda karşılaştırılması

Pages
357–364
Publication Date
2022-11-05
DOI
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AI Summary & Key Takeaways

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⚡ TL;DR(Too Long; Didn't Read)

To detect ischemia, the optimalcut-off points were 9.5 (sensitivity: 75%, specificity; 60%)for sTPD, and 4.5 (sensitivity: 56%, specificity: 73%) for iTPD.There were significant correlations between quantitative andsemi-quantitative methods in detection of significant coronaryartery disease (sTPD-SSS: r=0.954, sTPD-SDS: r=0.746,iTPD-SSS: r=0.654, iTPD-SDS: r=0.759; p

📌 3 Key Takeaways

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Objective & Hypothesis:Objective: The aim of this study was to assess the validity ofautomated quantitative and semiquantitative visual analysis oftotal perfusion deficit (TPD) using the IQ SPECT gamma camerasystem compared to conventional coronary angiographicallydetected significant coronary artery disease (CAD).Methods: The study included patients with suspected CADwho underwent myocardial perfusion single photon emissioncomputed tomography and conventional coronary angiography.The summed stress score (SSS), summed rest score(SRS), and summed difference score (SDS) (semiquantitativevisual analysis results) were assessed using a 5-point scalein a standard 17-segment model, and TPD (stress, rest, andischemic TPD) was quantified using automated software.Results: In all, 84 patients (Group 1, those who underwentrevascularization) had significant coronary artery lesions,and 81 (Group 2) had non-significant lesions.
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Key Findings & Data:The medianinterquartile range values were: stress-TPD (sTPD): 16 (3.5–33.5) vs 9.2 (2–17.9), rest-TPD: 9.4 (2.2–18.8) vs 4 (1–11),and 6.9 (1.9–14.1) vs 3.4 (1–6.1) for ischemic-TPD (iTPD) inGroup 1 and Group 2, respectively.
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Conclusion & Impact:To detect ischemia, the optimalcut-off points were 9.5 (sensitivity: 75%, specificity; 60%)for sTPD, and 4.5 (sensitivity: 56%, specificity: 73%) for iTPD.There were significant correlations between quantitative andsemi-quantitative methods in detection of significant coronaryartery disease (sTPD-SSS: r=0.954, sTPD-SDS: r=0.746,iTPD-SSS: r=0.654, iTPD-SDS: r=0.759; p
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Objective: The aim of this study was to assess the validity ofautomated quantitative and semiquantitative visual analysis oftotal perfusion deficit (TPD) using the IQ SPECT gamma camerasystem compared to conventional coronary angiographicallydetected significant coronary artery disease (CAD).Methods: The study included patients with suspected CADwho underwent myocardial perfusion single photon emissioncomputed tomography and conventional coronary angiography.The summed stress score (SSS), summed rest score(SRS), and summed difference score (SDS) (semiquantitativevisual analysis results) were assessed using a 5-point scalein a standard 17-segment model, and TPD (stress, rest, andischemic TPD) was quantified using automated software.Results: In all, 84 patients (Group 1, those who underwentrevascularization) had significant coronary artery lesions,and 81 (Group 2) had non-significant lesions. The medianinterquartile range values were: stress-TPD (sTPD): 16 (3.5–33.5) vs 9.2 (2–17.9), rest-TPD: 9.4 (2.2–18.8) vs 4 (1–11),and 6.9 (1.9–14.1) vs 3.4 (1–6.1) for ischemic-TPD (iTPD) inGroup 1 and Group 2, respectively. To detect ischemia, the optimalcut-off points were 9.5 (sensitivity: 75%, specificity; 60%)for sTPD, and 4.5 (sensitivity: 56%, specificity: 73%) for iTPD.There were significant correlations between quantitative andsemi-quantitative methods in detection of significant coronaryartery disease (sTPD-SSS: r=0.954, sTPD-SDS: r=0.746,iTPD-SSS: r=0.654, iTPD-SDS: r=0.759; p

Özet

Amaç: Bu çalışmada IQ SPECT gama kamera sistemi ile elde edilen total perfüzyon defekti (TPD) değeri ile yapılan görsel semikantitatif analizin konvansiyonel koroner anjiyografi ile karşılaştırmalı olarak ciddi koroner arter hastalığını (KAH) tespit etmedeki geçerliliği değerlendirilmiştir. Yöntemler: Çalışmaya KAH şüphesi ile miyokart perfüzyon SPECT değerlendirmesi ve sonucunda geleneksel koroner anjiyografi uygulanmış hastalar dahil edildi. Toplam stres skoru (SSS), toplam istirahat skoru (SRS) ve toplam fark skoru (SDS) ile yarı-nicel görsel analiz sonuçları, standart 17 segmentli bir modelde beş-puanlamalı bir ölçek üzerinde değerlendirildi. TPD (stres, dinlenme ve iskemik TDP) otomatik nicel ölçebilen yazılım ile değerlendirildi. Bulgular: Seksen dört hastada ciddi KAH saptanarak revaskülarizasyon işlemi uygulandı (Grup 1). 81 hastada ise nonkritik koroner lezyon izlendi (Grup 2). Ortanca ve çeyrekler arası aralık (IQR) değerler sırasıyla stres-TPD, 16’ya (3.5– 33.5) karşın 9.2 (2–17.9), istirahat TPD için 9.4’e (2.2–18.8) karşın 4 (1–11) ve iskemik-TPD için 6.9’a (1.9–14.1) karşın 3.4 (1–6.1) saptandı. İskemi tespit etmek için, en uygun kestirim noktası, stres TPD için 9.5 (duyarlılık %75, özgüllük %60) ve iskemik TPD için 4.5 (duyarlılık %56, özgüllük %73) idi. Nicel yöntem ile yarı-nicel yöntemin arasında KAH saptanması açısından anlamlı korelasyon izlendi (stres için TPD-SSS r=0.954, stres TPD-SDS için r=0.746, iskemik TPDSSS için r=0.654, iskemik TPD-SDS için r=0.759; tümü için p

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Cite This Article

Bayram, Z., Acar, R. D., Doğan, C., Candan, Ö., Çağatay, S., Çap, M., Karagöz, A., Uslu, A., Kaymaz, C., Özdemir, N., Çınaral, F., Hakgör, A., Erdoğan, E., Akbal, Ö. Y. (2022). Comparison of automated quantification and semiquantitative visual analysis findings of IQ SPECT MPI with conventional coronary angiography in patients with stable angina. Türk Kardiyoloji Derneği Arşivi, Cilt: 47 - Sayı: 5, 357–364. https://ajindex.com/articles/632066

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