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Edge Packing Artifact Mimicking Lytic–Sclerotic Lesion in Bone Scan Due to Spontaneous Malfunction of Photomultiplier Tubes in the Gamma Camera

Edge packing is a kind of nonuniformity artifact, which usually appears as an accumulation of counts at the edge of the field of view compared to the central region. The common causes of edge packing artifact in the image are defective collimator, noncalibrated photomultiplier tube (PMT), and improp...

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Detalles Bibliográficos
Autores principales: Nautiyal, Amit, Mitra, Deepanjan, Mukherjee, Anirban, Chatterjee, Piyali, Roy, Anindya
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Wolters Kluwer - Medknow 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6481219/
https://www.ncbi.nlm.nih.gov/pubmed/31040526
http://dx.doi.org/10.4103/ijnm.IJNM_168_18
Descripción
Sumario:Edge packing is a kind of nonuniformity artifact, which usually appears as an accumulation of counts at the edge of the field of view compared to the central region. The common causes of edge packing artifact in the image are defective collimator, noncalibrated photomultiplier tube (PMT), and improper adjustment of deflector plates of CRT. We hereby discuss the occurrence of edge packing artifact due to a problem with the PMTs in the anterior head of gamma camera system during acquisition of bone scintigraphy which mimics as pathological lytic–sclerotic lesion during whole-body image at anterior acquisition. The artifact was successfully removed after the replacement of malfunctioning PMTs.