Intra- and inter-observer variability in intracranial aneurysm segmentation: comparison between CT angiography (semi-automated segmentation software stroke VCAR) and digital subtraction angiography (3D rotational angiography)

Autor: C. Ciardi, A Infante, M. Scarabello, Francesco D'Argento, Iacopo Valente, Edoardo Leone, Alessandro Pedicelli, Andrea Alexandre, Cesare Colosimo, Emilio Lozupone
Rok vydání: 2019
Předmět:
Adult
Male
Subarachnoid hemorrhage
Stroke VCAR
Adolescent
Computed Tomography Angiography
Partial volume
Statistics
Nonparametric
Young Adult
Aneurysm
Multidetector Computed Tomography
medicine
Humans
Radiology
Nuclear Medicine and imaging
Segmentation
cardiovascular diseases
Stroke
Settore MED/36 - DIAGNOSTICA PER IMMAGINI E RADIOTERAPIA
Aged
Retrospective Studies
Aged
80 and over
Observer Variation
Artifact (error)
medicine.diagnostic_test
business.industry
Inter-observer variability
Angiography
Digital Subtraction
Reproducibility of Results
Innovative biotechnologies
Intracranial Aneurysm
General Medicine
Digital subtraction angiography
Middle Aged
Reference Standards
Subarachnoid Hemorrhage
medicine.disease
Cerebral Angiography
CT angiography
Angiography
Female
business
Nuclear medicine
Zdroj: La Radiologia medica. 126(3)
ISSN: 1826-6983
Popis: To compare size and morphologic features of three-dimensional aneurysm models, obtained with a semi-automated segmentation software (Stroke VCAR, GE, USA) from cerebral CT angiography (CTA) data, to three-dimensional aneurysm models obtained with digital subtraction angiography (DSA, with 3D rotational angiography acquisition—3DRA), considered as the reference standard. In this retrospective study, we reviewed 132 patients, with a total number of 137 intracranial aneurysm, who underwent CTA and subsequent DSA examination, supplemented with 3DRA. We compared neck length, short axis and long axis measured on 3DRA model to the same variables measured on 3D-CTA model by two blinded readers and to the automatic software dimensions. Therefore, statistics analysis assessed intra-observer and inter-observer variability and differences between patients with or without subarachnoid hemorrhage (SAH). There were no significant differences in short-axis and long-axis measurements between 3D angiographic and 3D-CTA models, while comparison of neck lengths revealed a statistically significant difference, which tended to be greater for smaller neck lengths (partial volume effect and “kissing vessels” artifact). There were significant differences between manual and automatic data measured for the same three variables, and the presence of SAH did not affect aneurysm 3D reconstruction. Inter-observer agreement resulted moderate for neck length and substantial for short axis and long axis. The examined 3D-CTA segmentation system is a reproducible procedure for aneurysm morphologic characterization and, in particular, for assessment of aneurysm sac dimensions, but considerable carefulness is required in neck length interpretation.
Databáze: OpenAIRE
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