Why the study?
Intimal sarcoma of the pulmonary artery is a rare entity that mimics acute or chronic pulmonary thromboembolism.
Does 68Ga-FAPI-04 PET/CT improve tumor delineation compared to 18F-FDG PET/CT in a patient with intimal sarcoma of the pulmonary artery?
Does 68Ga-FAPI-04 PET/CT improve tumor delineation compared to 18F-FDG PET/CT in a patient with intimal sarcoma of the pulmonary artery?
68Ga-FAPI-04 PET/CT may offer superior tumor delineation over 18F-FDG PET/CT for intimal sarcoma of the pulmonary artery due to lower background uptake.
Answers are grounded in this paper and cite their sources.
May support FAPI PET/CT evaluation in pulmonary artery sarcoma; hypothesis-generating and should not yet change practice.
Intimal sarcoma of the pulmonary artery is a rare entity, mimicking acute or chronic pulmonary thromboembolism. We describe 68 Ga-FAPI-04 and 18 F-FDG PET/CT findings in a case with intimal sarcoma of the pulmonary artery. The intrapulmonary artery tumor showed inhomogeneously increased FDG and FAPI uptake. Compared with FDG PET/CT, FAPI PET/CT more clearly delineated the tumor partially because of a very low background FAPI activity in the walls of the main pulmonary artery and right ventricle, which showed diffuse FDG uptake.
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A 2022 study studied this question.
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