Novel Approach to Segment the Inner and Outer Boundaries of the Bladder Wall in...

• Autor(es): Zhen Ma ; Renato Natal Jorge ; T. Mascarenhas ; João Manuel R. S. Tavares
• Data: 2011
• Identificador Persistente: http://hdl.handle.net/10216/56354
• Origem: Repositório Aberto da Universidade do Porto
• Assunto(s): Ciências tecnológicas; Engenharia; Engenharia biomédica
• Tipo de Documento: Artigo
• Idioma: Inglês

Descrição

Diagnosis of bladder-related conditions needs critical measurements which require the segmentation of the inner and outer boundaries of the bladder wall. In T2-weighted MR images, the low-signal-intensity bladder wall can be identified due to the large contrast with the high-signal-intensity urine and perivesical fat. In this paper, two deformable models are proposed to segment the bladder wall. Based on the imaging features of the bladder, a modified geodesic active contour is proposed to segment the inner boundary. This method uses the statistical information of the bladder lumen and can handle the intensity variation in MR images. Having obtained the inner boundary, a shape influence field is formed and integrated with the Chan-Vese model to segment the outer boundary. The shape guided C-V model can prevent the overlapping between the two boundaries when the appearance of the bladder wall is blurred. Segmentation examples are presented and analyzed to demonstrate the effectiveness of this novel approach.