Real-time volume rendering for three-dimensional fetal ultrasound using volumetric photon mapping  

作　　者：Jing Zou Jing Qin 

机构地区：[1]Centre for Smart Health,School of Nursing,the Hong Kong Polytechnic University,Hong Kong,China

出　　处：《Visual Computing for Industry,Biomedicine,and Art》2024年第1期83-97,共15页工医艺的可视计算(英文)

基　　金：supported by a grant from General Research Fund of Hong Kong Research Grants Council,No.15218521;a grant under the scheme of Collaborative Research with World-leading Research Groups in the Hong Kong Polytechnic University,No.G-SACF。

摘　　要：Three-dimensional(3D)fetal ultrasound has been widely used in prenatal examinations.Realistic and real-time volumetric ultrasound volume rendering can enhance the effectiveness of diagnoses and assist obstetricians and pregnant mothers in communicating.However,this remains a challenging task because(1)there is a large amount of speckle noise in ultrasound images and(2)ultrasound images usually have low contrasts,making it difficult to distinguish different tissues and organs.However,traditional local-illumination-based methods do not achieve satisfactory results.This real-time requirement makes the task increasingly challenging.This study presents a novel real-time volume-rendering method equipped with a global illumination model for 3D fetal ultrasound visualization.This method can render direct illumination and indirect illumination separately by calculating single scattering and multiple scattering radiances,respectively.The indirect illumination effect was simulated using volumetric photon mapping.Calculating each photon’s brightness is proposed using a novel screen-space destiny estimation to avoid complicated storage structures and accelerate computation.This study proposes a high dynamic range approach to address the issue of fetal skin with a dynamic range exceeding that of the display device.Experiments show that our technology,compared to conventional methodologies,can generate realistic rendering results with far more depth information.

关 键 词：Three-dimensional fetal ultrasound Volume rendering Photon mapping Global illumination 

分 类 号：R71[医药卫生—妇产科学]