Dataset Information

Automatic image processing pipeline for tracking longitudinal vessel changes in magnetic resonance angiography.

ABSTRACT:

Background

Cerebral vessel diameter changes objectively and automatically derived from longitudinal magnetic resonance angiography (MRA) facilitate quantification of vessel changes and further modeling.

Purpose

To characterize longitudinal changes in intracranial vessel diameter using time-of-flight (TOF) MRA.

Study type

Retrospective longitudinal study.

Subject population

IN all, 112 pediatric patients, aged 9.96 ± 4.59 years, with craniopharyngioma from 2006-2011 scanned annually.

Field strength/sequence

1.5T and 3T TOF MRA.

Statistical tests

Chi-square and Wilcoxon-Mann-Whitney tests.

Assessment

Manual measurements using interventional angiography was established as a reference standard for diameter measurements. Constant and linear quantile regression with absolute difference, percentage difference, and relative difference was used for outlier detection.

Results

Major vessels surrounding the circle of Willis were successfully segmented except for posterior communicating arteries, mostly due to disease-related hypoplasia. Diameter measurements were calculated at 1-mm segments with a median computed vessel diameter of 1.25 mm. Diameter distortion due to registration was within 0.04 mm for 99% of vessel segments. Outlier detection using quantile regression detected less than 4.34% as being outliers. Outliers were more frequent in smaller vessels and proximity to bifurcations (P < 0.001).

Data conclusion

Using the proposed method, objective changes in vessel diameter can be acquired noninvasively from routine longitudinal imaging. High-throughput analyses of imaging-derived vascular trees combined with clinical and treatment parameters will allow rigorous modeling of vessel diameter changes.

Level of evidence

2 Technical Efficacy: Stage 2 J. Magn. Reson. Imaging 2019;50:1063-1074.

SUBMITTER: Hsu CY

PROVIDER: S-EPMC8720418 | biostudies-literature |

REPOSITORIES: biostudies-literature

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