» Articles » PMID: 32602084

Ultrafast Ultrasound Imaging for Super-Resolution Preclinical Cardiac PET

Overview
Publisher Springer
Date 2020 Jul 1
PMID 32602084
Citations 1
Authors
Affiliations
Soon will be listed here.
Abstract

Purpose: Physiological motion and partial volume effect (PVE) significantly degrade the quality of cardiac positron emission tomography (PET) images in the fast-beating hearts of rodents. Several Super-resolution (SR) techniques using a priori anatomical information have been proposed to correct motion and PVE in PET images. Ultrasound is ideally suited to capture real-time high-resolution cine images of rodent hearts. Here, we evaluated an ultrasound-based SR method using simultaneously acquired and co-registered PET-CT-Ultrafast Ultrasound Imaging (UUI) of the beating heart in closed-chest rodents.

Procedures: The method was tested with numerical and animal data (n = 2) acquired with the non-invasive hybrid imaging system PETRUS that acquires simultaneously PET, CT, and UUI.

Results: We showed that ultrasound-based SR drastically enhances the quality of PET images of the beating rodent heart. For the simulations, the deviations between expected and mean reconstructed values were 2 % after applying SR. For the experimental data, when using Ultrasound-based SR correction, contrast was improved by a factor of two, signal-to-noise ratio by 11 %, and spatial resolution by 56 % (~ 0.88 mm) with respect to static PET. As a consequence, the metabolic defect following an acute cardiac ischemia was delineated with much higher anatomical precision.

Conclusions: Our results provided a proof-of-concept that image quality of cardiac PET in fast-beating rodent hearts can be significantly improved by ultrasound-based SR, a portable low-cost technique. Improved PET imaging of the rodent heart may allow new explorations of physiological and pathological situations related with cardiac metabolism.

Citing Articles

Acute stress induces long-term metabolic, functional, and structural remodeling of the heart.

Yoganathan T, Perez-Liva M, Balvay D, Le Gall M, Lallemand A, Certain A Nat Commun. 2023; 14(1):3835.

PMID: 37380648 PMC: 10307856. DOI: 10.1038/s41467-023-39590-3.

References
1.
Jeppesen J, Kiens B . Regulation and limitations to fatty acid oxidation during exercise. J Physiol. 2012; 590(5):1059-68. PMC: 3381814. DOI: 10.1113/jphysiol.2011.225011. View

2.
Haas F, Jennen L, Heinzmann U, Augustin N, Wottke M, Schwaiger M . Ischemically compromised myocardium displays different time-courses of functional recovery: correlation with morphological alterations?. Eur J Cardiothorac Surg. 2001; 20(2):290-8. DOI: 10.1016/s1010-7940(01)00781-3. View

3.
Vesely M, Dilsizian V . Nuclear cardiac stress testing in the era of molecular medicine. J Nucl Med. 2008; 49(3):399-413. DOI: 10.2967/jnumed.107.033530. View

4.
Hernandez-Esquivel L, Marin-Hernandez A, Pavon N, Carvajal K, Moreno-Sanchez R . Cardiotoxicity of copper-based antineoplastic drugs casiopeinas is related to inhibition of energy metabolism. Toxicol Appl Pharmacol. 2005; 212(1):79-88. DOI: 10.1016/j.taap.2005.06.023. View

5.
Luo J, Konofagou E . Imaging of wall motion coupled with blood flow velocity in the heart and vessels in vivo: a feasibility study. Ultrasound Med Biol. 2011; 37(6):980-95. PMC: 4009734. DOI: 10.1016/j.ultrasmedbio.2011.03.004. View