Author name cluster

Qi Ge

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4 papers

1 author row

YNIMG Journal 2026 Journal Article

Standardized quantification of [18F]Florbetazine amyloid PET with the Centiloid scale

Meiqi Wu
Menglin Liang
Chenhui Mao
Liling Dong
Qi Ge
Yuying Li
Jingnan Wang
Chao Ren

C]PiB across different image-processing pipelines and effective image resolutions (EIRs). METHODS: C]PiB SUVR were evaluated under different EIRs. RESULTS: F]FBZ SUVR were observed across EIRs with the SPM pipeline, whereas regression parameters varied across EIRs with the FreeSurfer pipeline. CONCLUSION: F]FBZ demonstrated equal or improved quantification precision, supporting its broader use in clinical and research Aβ imaging.

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YNIMG Journal 2024 Journal Article

Evaluation of a novel PET tracer [18F]-Florbetazine for Alzheimer's disease diagnosis and β-amyloid deposition quantification

Meiqi Wu
Chao Ren
Chenhui Mao
Liling Dong
Bo Li
Xueqian Yang
Zhenghai Huang
Haiqiong Zhang

F]-92) is a selective PET tracer for β-amyloid (Aβ) depositions with a novel diaryl-azine scaffold to reduce lipophilicity and to achieve higher gray-to-white matter contrast. We aimed to assess its diagnostic value in Alzheimer's disease (AD) and pharmacokinetics characteristics in human subjects. METHODS: F]-Florbetazine and a structural MRI scan. The time-activity-curves (TACs) for volumes of interest (VOIs) in cerebral cortex, cerebellar cortex and cerebral white matter was depicted and their standardized uptake value ratios (SUVRs) with cerebellar cortex as reference were compared between HCs and AD patients. The cerebral gray-to-white matter SUV ratio (GWR) was also calculated. RESULTS: In HCs, radioactivities in the cerebral cortex VOIs were homogeneously low and at the same level as in cerebellar cortex, while in AD patients, cortical VOIs expected to contain Aβ exhibited high radioactivity. Cerebral cortex SUVRs remain relatively low in HCs while keep increasing along with time in AD patients. After 15 min, the cerebral cortex SUVRs became significant higher in AD patients compared to HCs with 100 % discrimination accuracy. In AD patients, GWR remained over 1.3 for all time intervals and visual inspection showed lower uptake in cerebral white matter compared to cerebral cortex. CONCLUSION: F]-Florbetazine can be potentially used for detection and quantification of Aβ depositions in the living human brain.

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IJCAI Conference 2017 Conference Paper

Interactive Image Segmentation via Pairwise Likelihood Learning

Tao Wang
Quansen Sun
Qi Ge
Zexuan Ji
Qiang Chen
Guiyu Xia

This paper presents an interactive image segmentation approach where the segmentation problem is formulated as a probabilistic estimation manner. Instead of measuring the distances between unseeded pixels and seeded pixels, we measure the similarities between pixel pairs and seed pairs to improve the robustness to the seeds. The unary prior probability of each pixel belonging to the foreground F and background B can be effectively estimated based on the similarities with label pairs (F, F), (F, B), (B, F) and (B, B). Then a likelihood learning framework is proposed to fuse the region and boundary information of the image by imposing the smoothing constraint on the unary potentials. Experiments on challenging data sets demonstrate that the proposed method can obtain better performance than state-of-the-art methods.

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TCS Journal 2006 Journal Article

Approximating the minimum weight weak vertex cover

Yong Zhang
Qi Ge
Rudolf Fleischer
Tao Jiang
Hong Zhu

Accurate network flow measurement is important for a variety of network applications, where the “flow” over an edge in the network is intuitively the rate of data traffic. The problem of efficiently monitoring the network flow can be regarded as finding the minimum weight weak vertex cover for a given graph. In this paper, we present a ( 2 - 2 ν ( G ) ) -approximation algorithm solving for this problem, which improves previous results, where ν ( G ) is the cyclomatic number of G.

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