Respiratory Gating and the Performance of PET/CT in Pulmonary Lesions

Overview

Journal Curr Radiopharm

Publisher Bentham Science Publishers

Specialties Nuclear Medicine
Pharmacology
Radiology

Date 2020 Mar 19

PMID 32183685

Citations 2

Authors

Cinzia Crivellaro

Luca Guerra

Affiliations

Soon will be listed here.

Abstract

Background: Motion artifacts related to the patient's breathing can be the cause of underestimation of the lesion uptake and can lead to missing of small lung lesions. The respiratory gating (RG) technology has demonstrated a significant increase in image quality.

Objective: The aim of this paper was to evaluate the advantages of RG technique on PET/CT performance in lung lesions. The impact of 4D-PET/CT on diagnosis (metabolic characterization), staging and re-staging lung cancer was also assessed, including its application for radiotherapy planning. Finally, new technologies for respiratory motion management were also discussed.

Methods: A comprehensive electronic search of the literature was performed by using Medline database (PubMed) searching "PET/CT", "gated" and "lung". Original articles, review articles, and editorials published in the last 10 years were selected, included and critically reviewed in order to select relevant articles.

Results: Many papers compared Standardized Uptake Value (SUV) in gated and ungated PET studies showing an increase in SUV of gated images, particularly for the small lesions located in medium and lower lung. In addition, other features as Metabolic Tumor Volume (MTV), Total Lesion Glycolysis (TLG) and textural-features presented differences when obtained from gated and ungated PET acquisitions. Besides the increase in quantification, gating techniques can determine an increase in the diagnostic accuracy of PET/CT. Gated PET/CT was evaluated for lung cancer staging, therapy response assessment and for radiation therapy planning.

Conclusion: New technologies able to track the motion of organs lesion directly from raw PET data, can reduce or definitively solve problems (i.e.: extended acquisition time, radiation exposure) currently limiting the use of gated PET/CT in clinical routine.

Citing Articles

Impact of Respiratory-gated 4D PET/CT Scan for Motion Correction in Characterizing Lesions Adjacent to the Diaphragm - A Cross-sectional Study at a Tertiary Care Institute.

Patro S, Aland P, James V, Lele V Indian J Nucl Med. 2024; 39(3):177-184.

PMID: 39291077 PMC: 11404739. DOI: 10.4103/ijnm.ijnm_142_23.

[Research progress on the identification of central lung cancer and atelectasis using multimodal imaging].

Liu T, Zhu J, Li B Sheng Wu Yi Xue Gong Cheng Xue Za Zhi. 2023; 40(6):1255-1260.

PMID: 38151951 PMC: 10753321. DOI: 10.7507/1001-5515.202304016.

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