دورية أكاديمية
أعرض في EDS

Adjustment of acquisition arc in cardiac malposition during myocardial perfusion SPECT imaging: computer simulation based on deterministic modeling.

التفاصيل البيبلوغرافية
العنوان: Adjustment of acquisition arc in cardiac malposition during myocardial perfusion SPECT imaging: computer simulation based on deterministic modeling.
المؤلفون: Qutbi M; Department of Nuclear Medicine, Taleghani Hospital, School of Medicine, Shahid Beheshti University of Medical Sciences, Yaman St., Velenjak, 1985711151, Tehran, Iran. mohsen.qutbi@gmail.com.
المصدر: Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology [J Nucl Cardiol] 2023 Oct; Vol. 30 (5), pp. 1910-1921. Date of Electronic Publication: 2023 May 04.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: Elsevier Inc. on behalf of American Society of Nuclear Cardiology Country of Publication: United States NLM ID: 9423534 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1532-6551 (Electronic) Linking ISSN: 10713581 NLM ISO Abbreviation: J Nucl Cardiol Subsets: MEDLINE
أسماء مطبوعة: Publication: 2024- : New York : Elsevier Inc. on behalf of American Society of Nuclear Cardiology
Original Publication: St. Louis, MO : Mosby-Year Book, Inc., c1994-
مواضيع طبية MeSH: Dextrocardia* , Myocardial Perfusion Imaging*, Humans ; Computer Simulation ; Heart/diagnostic imaging ; Tomography, Emission-Computed, Single-Photon/methods ; Phantoms, Imaging ; Perfusion ; Image Processing, Computer-Assisted/methods
مستخلص: Objectives: To simulate cardiac malpositions, leftward and rightward shift and dextrocardia, and also to compare distribution of activity of septal and lateral walls of left ventricle acquired in standard acquisition arc and after relevant adjustment.
Methods: In this study, digital phantoms with cardiac malpositions are designed and procedure of acquisition of scan in standard arc (from right anterior oblique to left posterior oblique) and adjusted acquisition arc is simulated. The three situations of malposition including leftward and rightward shift and dextrocardia are considered. For all types, acquisition is conducted in standard and then adjusted arcs (from anterior to posterior and also from right to left for leftward and rightward shifts, respectively, and for dextrocardia, from left anterior oblique to right posterior oblique). All obtained projections are reconstructed using the algorithm of filtered back projection. During forward projection to obtain sinograms, radiation attenuation is also modeled by incorporation of a simplified transmission map to emission map. The resulting tomographic slices of the LV (septum, apex, and lateral wall) are presented visually and are compared by plotting intensity profiles of the walls. Finally, normalized error images are also computed. All the computations are performed in MATLAB software package.
Results: In transverse slice, septum and lateral wall are attenuated progressively from apex, which is closer to the camera, to the base in similar fashion. In tomographic slices of standard acquisition arc, the septum shows remarkably higher activity compared to lateral wall. However, after adjustment, both seems equally intense and progressively being attenuated from apex to base, similar to that found in phantom with normally positioned heart. Likewise, for the phantom with rightward shift, when the scanning was done in standard arc, the septum is more intense than the lateral wall. And similarly, adjustment of the arc renders both walls equally intense. In dextrocardia, level of attenuation of basal parts of septum and lateral wall is higher in 360° arc compared to adjusted 180° arc.
Conclusion: Adjustment of acquisition arc exerts perceptible changes in distribution of activity over LV walls which are more compatible with normally positioned heart.
(© 2023. The Author(s) under exclusive licence to American Society of Nuclear Cardiology.)
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فهرسة مساهمة: Keywords: acquisition arc; adjustment; cardiac malposition; myocardial perfusion SPECT; simulation
تواريخ الأحداث: Date Created: 20230504 Date Completed: 20231009 Latest Revision: 20240130
رمز التحديث: 20240130
DOI: 10.1007/s12350-023-03266-8
PMID: 37142878
قاعدة البيانات: MEDLINE
الوصف
تدمد:1532-6551
DOI:10.1007/s12350-023-03266-8