• Title/Summary/Keyword: Gated blood pool scan

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Evaluating Usefulness of Deep Learning Based Left Ventricle Segmentation in Cardiac Gated Blood Pool Scan (게이트심장혈액풀검사에서 딥러닝 기반 좌심실 영역 분할방법의 유용성 평가)

  • Oh, Joo-Young;Jeong, Eui-Hwan;Lee, Joo-Young;Park, Hoon-Hee
    • Journal of radiological science and technology
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    • v.45 no.2
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    • pp.151-158
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    • 2022

  • The Cardiac Gated Blood Pool (GBP) scintigram, a nuclear medicine imaging, calculates the left ventricular Ejection Fraction (EF) by segmenting the left ventricle from the heart. However, in order to accurately segment the substructure of the heart, specialized knowledge of cardiac anatomy is required, and depending on the expert's processing, there may be a problem in which the left ventricular EF is calculated differently. In this study, using the DeepLabV3 architecture, GBP images were trained on 93 training data with a ResNet-50 backbone. Afterwards, the trained model was applied to 23 separate test sets of GBP to evaluate the reproducibility of the region of interest and left ventricular EF. Pixel accuracy, dice coefficient, and IoU for the region of interest were 99.32±0.20, 94.65±1.45, 89.89±2.62(%) at the diastolic phase, and 99.26±0.34, 90.16±4.19, and 82.33±6.69(%) at the systolic phase, respectively. Left ventricular EF was calculated to be an average of 60.37±7.32% in the ROI set by humans and 58.68±7.22% in the ROI set by the deep learning segmentation model. (p<0.05) The automated segmentation method using deep learning presented in this study similarly predicts the average human-set ROI and left ventricular EF when a random GBP image is an input. If the automatic segmentation method is developed and applied to the functional examination method that needs to set ROI in the field of cardiac scintigram in nuclear medicine in the future, it is expected to greatly contribute to improving the efficiency and accuracy of processing and analysis by nuclear medicine specialists.

  • https://doi.org/10.17946/JRST.2022.45.2.151 인용 PDF KSCI

Clinical Study of Ventricular Function Following Open Heart Surgery by Radionuclide Angiocardiogram - left ventricular ejection fraction by ECG gated blood pool scan - (방사성 동위원소를 이용한 개심술 전후의 심실기능 변화에 관한 연구: ECG gated blood pool scan을 이용한 ejection fraction 검사)

  • Lee, Jeong-Cheol;Kim, Gyu-Tae
    • Journal of Chest Surgery
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    • v.19 no.1
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    • pp.25-34
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    • 1986

  • Recently, radionuclide angiocardiogram is one of the most common procedure for assessment of ventricular performance due to its distinctive advantages such as safety, accuracy, and ease of repeated studies. Also, measurement and comparison between pre and postoperative left ventricular ejection fraction [LVEF] are meaningful for assessing the severity of myocardial damage which occurred during open heart surgery and the status of myocardial recovery. We obtained pre and post operative LVEF using radionuclide angiocardiogram on 30 patients composed of atrial septal defect, ventricular septal defect, cyanotic congenital heart disease, and valvular heart disease who undergone the open heart surgery from March to august 1984. The study revealed that ventricular septal defect and mitral valvular heart disease showed 8.1% and 6.2% decreases of postoperative LVEF, respectively. But, there are little increases of postoperative LVEF in the atrial septal defect and cyanotic congenital heart disease. In ventricular septal defect, each group of Qp/Qs over 2.0 and systolic pulmonary artery pressure over 50mmHg showed significant 17% and 14.7% decreases of postoperative LVEF, respectively. Considering the duration of the aortic cross clamping times and closing methods of VSD, each group of duration over 30 min. and of patch closure showed 13.9% and 14.2% decreases of LVEF between pre and postoperative status respectively which was significant finding statistically.

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Comparison between Myocardial Perfusion and Function in Rest State in Coronary Artery Disease - Dipyridamole $^{99m}Tc-MIBI$ SPECT and Rest Gated Blood Pool Scan - (관상동맥질환에서 휴식기의 심근관류 정도와 휴식기 심기능 변화의 비교 - Dipyridamole 부하 $^{99m}Tc-MIBI$ SPECT와 휴식기 Gated Blood Pool Scan -)

  • Choi, Chang-Woon;Lee, Dong-Soo;Kim, Sang-Eun;Bae, Sang-Kyun;Yang, Hyung-In;Chung, June-Key;Lee, Myoung-Mook;Lee, Myung-Chul;Park, Young-Bae;Seo, Jung-Don;Lee, Young-Woo;Koh, Chang-Soon
    • The Korean Journal of Nuclear Medicine
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    • v.26 no.2
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    • pp.265-273
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    • 1992

  • Rest gated blood pool scan (Rest GBP scan) and dipyridamole $^{99m}Tc-MIBI$ SPECT were Performed in 34 patients with or suspected coronary artery disease. Both studies were performed within $2\sim32$ days (mean 8.1 days). A significant correlation was present between left ventricular ejection fraction (r= -0.7356, p<0.001) and peak ejection rate and peak filling rate in rest GBP scan and perfusion defect in MIBI SPECT. And there were acceptable correlations (0.05$26.2{\pm}10.8%$, severe hypokinesia, akinesia or dyskinesia in 16 regions: $78.2{\pm}23.7$, p<0.001). These data indicate there is a significant coupling between the degree of myocardial perfusion and the myocardial functional change in coronary artery disease.

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