Comparison of 3D computer-aided with manual cerebral aneurysm measurements in different imaging modalities

Groth, Michael; Forkert, Nils D.; Buhk, Jan Hendrik; Schoenfeld, Myron R.; Goebell, Einar; Fiehler, Jens

doi:10.1007/s00234-012-1095-8

Cited by 12 publications

(13 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The size of aneurysm is generally assumed to be the maximum diameter, but the method used to measure the maximum diameter and the imaging modality to obtain the data significantly affects the measurement. 25 To improve the precision of the prediction and the clinical pertinence and usability, the assessment of the criteria needs to be improved and refined.…”

Section: Limitations Because Of Variable Measurement Lack Of Precisionmentioning

confidence: 99%

PHASES Score for the Management of Intracranial Aneurysm

Bijlenga

Gondar

Schilling

et al. 2017

Stroke

128

View full text Add to dashboard Cite

Background and Purpose-The aim of this study is to assess whether the PHASES score allows to (1) match decisions taken by multidisciplinary team whether to observe or intervene, (2) classify patients being diagnosed with a ruptured versus unruptured intracranial aneurysm (UIA), and (3) discriminate patients at low risk of rupture from the population of patients diagnosed with intracranial aneurysm. Methods-Population-based prospective and consecutive data were collected between 2006 and 2014. Patients (n=841) were stratified into 4 groups: stable UIA; growing observed UIA; immediately treated UIA; and aneurysmal subarachnoid hemorrhage (aSAH). All patients initially observed were pooled in a follow-up UIA group; patients from growing observed UIA, immediately treated UIA, and aSAH were pooled in a high risk of rupture group. 4,7]; stable UIA outcome prediction by PHASES score of ≤3: areas under these curves=0.76). Conclusions-There is a progression of PHASES score between stable UIA, growing observed UIA, immediately treated UIA, and aSAH groups. PHASES score of ≤3 is associated with a low but not negligible likelihood of aneurysm rupture, and specificity of the classifier is low.

show abstract

Section: Limitations Because Of Variable Measurement Lack Of Precisionmentioning

confidence: 99%

PHASES Score for the Management of Intracranial Aneurysm

Bijlenga

Gondar

Schilling

et al. 2017

Stroke

128

View full text Add to dashboard Cite

show abstract

“…Manual post-processing is time consuming and prone to error especially in the context of complex aneurysm shapes, which can be difficult to understand when presented in 2-dimensions. Specifically, it was shown that computer-aided segmentation significantly improves the otherwise limited intra- and inter-observer agreement of manual post-processing[13]. We therefore developed a software tool for the semi-automatic segmentation of cerebral aneurysms from the 4DCTA data.…”

Section: Introductionmentioning

confidence: 99%

Feasibility of Quantification of Intracranial Aneurysm Pulsation with 4D CTA with Manual and Computer-Aided Post-Processing

et al. 2016

View full text Add to dashboard Cite

Background and PurposeThe analysis of the pulsation of unruptured intracranial aneurysms might improve the assessment of their stability and risk of rupture. Pulsations can easily be concealed due to the small movements of the aneurysm wall, making post-processing highly demanding. We hypothesized that the quantification of aneurysm pulsation is technically feasible and can be improved by computer-aided post-processing.Materials and MethodsImages of 14 cerebral aneurysms were acquired with an ECG-triggered 4D CTA. Aneurysms were post-processed manually and computer-aided on a 3D model. Volume curves and random noise-curves were compared with the arterial pulse wave and volume curves were compared between both post-processing modalities.ResultsThe aneurysm volume curves showed higher similarity with the pulse wave than the random curves (Hausdorff-distances 0.12 vs 0.25, p<0.01). Both post-processing methods did not differ in intra- (r = 0.45 vs r = 0.54, p>0.05) and inter-observer (r = 0.45 vs r = 0.54, p>0.05) reliability. Time needed for segmentation was significantly reduced in the computer-aided group (3.9 ± 1.8 min vs 20.8 ± 7.8 min, p<0.01).ConclusionOur results show pulsatile changes in a subset of the studied aneurysms with the final prove of underlying volume changes remaining unsettled. Semi-automatic post-processing significantly reduces post-processing time but cannot yet replace manual segmentation.

show abstract

“…Another drawback of our study is the missing correlation with conventional angiography. However, the validity of the methods of semi-automatic volumetry and image registration has been shown in previous studies [10]. The use of MRA resembles the standard of care in many centers worldwide…”

Section: Discussionmentioning

confidence: 99%

“…Within this context, it was proposed to continuously quantify aneurysm recurrence volumes by applying a rigid registration and subsequent subtraction of vessel segmentations of consecutive 3-dimensional (3D) time-of-flight magnetic resonance (MR) angiography (TOF-MRA) datasets instead of visually assessing the dichotomous end point of a recurrence development [9,10]. Although a preliminary proof-of-concept lead to promising results in terms of a possible significant reduction of sample sizes required for the evaluation of new coils [9], a study comparing different coil types is still missing.…”

Section: Introductionmentioning

confidence: 99%

Aneurysm Recurrence Volumetry Is More Sensitive than Visual Evaluation of Aneurysm Recurrences

et al. 2014

Self Cite

View full text Add to dashboard Cite

show abstract

Comparison of 3D computer-aided with manual cerebral aneurysm measurements in different imaging modalities

Abstract: Computer-aided aneurysm measurement in 3D offers improved intra- and inter-observer reliability and a reproducible parameter extraction, which may be used in clinical routine and as objective surrogate end-points in clinical trials.

Cited by 12 publications

References 26 publications

PHASES Score for the Management of Intracranial Aneurysm

PHASES Score for the Management of Intracranial Aneurysm

Feasibility of Quantification of Intracranial Aneurysm Pulsation with 4D CTA with Manual and Computer-Aided Post-Processing

Aneurysm Recurrence Volumetry Is More Sensitive than Visual Evaluation of Aneurysm Recurrences

Contact Info

Product

Resources

About